Revision D July 1996 Copyright © 1993-1996 by California Instruments. All rights reserved.
SAFETY SUMMARY This power source contains high voltage and current circuits which are potentially lethal. Because of its size and weight, mechanical stability must be ensured. The following safety guidelines must be followed when operating or servicing this equipment. These guidelines are not a substitute for vigilance and common sense. California Instruments assumes no liability for the customer's failure to comply with these requirements. BEFORE APPLYING POWER 1.
TABLE OF CONTENTS 1. INTRODUCTION AND SPECIFICATIONS .......................................................................................................1 1.1. INTRODUCTION ..................................................................................................................................................1 1.2. GENERAL DESCRIPTION ...................................................................................................................................1 2.
3.7.2. MESSAGE FORMAT .....................................................................................................................................57 3.7.3. NUMERIC DATA FIELD...............................................................................................................................60 3.7.4. PROGRAM HEADERS ..................................................................................................................................60 3.7.5. OUTPUT PROGRAMMING .................
.6. PHASE B/C BOARD .........................................................................................................................................103 5.7. DISPLAY BOARD.............................................................................................................................................103 5.8. CURRENT LIMIT BOARD...............................................................................................................................103 5.9. MOTHER BOARD...............
9.6. TEST SPECIFICATION ....................................................................................................................................144 9.6.1. NORMAL STATE .........................................................................................................................................144 9.6.1.1. NORMAL STATE MINIMUM VOLTAGE AND FREQUENCY TEST...............................................................144 9.6.1.2. NORMAL STATE MAXIMUM VOLTAGE AND FREQUENCY TEST ...........
FIGURE 3-3: FUNCTION SYNC CONNECTIONS................................................................................................................31 FIGURE 3-4: KEYPAD ....................................................................................................................................................32 FIGURE 3-5: REMOTE COMMAND SEQUENCES ..............................................................................................................
1. INTRODUCTION AND SPECIFICATIONS 1.1. INTRODUCTION This instruction manual contains information on the installation, operation, calibration, and maintenance of all power systems that use the FCS-18-P. 1.2. GENERAL DESCRIPTION The FCS-18-P is a high efficiency power source that provides a low distortion output. The output can be configured in either a single or three-phase configuration. A number of FCS-18’s can be configured to supply full output power up to 54KVA.
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Figure 1 Model FCS-18(11 X 14 SINGLE SIDED) 3
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SPECIFICATIONS (All specifications apply for one FCS18 chassis with a 135 volt output voltage range, constant line voltage, under no-load and with External Sense Lines connected unless specified otherwise.
* Denotes guaranteed specifications. All other specifications are supplementary. Protection Input Under Voltage/Phase Loss Sense Line Fault Temperature Incorrect Signal Frequency Measurements (23°°C ±5°°C) Range * Voltage 0 to 312V 0 to 200V (HV4 Option 200 to 400V * Current 133 1333 * Power 18kW 180kW * Frequency 45 to 99.99 100 to 499.9 500 to 999.9 1000 to 1200 * Phase Angle 0 to 360 Yes Open, short, reversal Shutdown, no automatic reset Shutdown, no automatic reset Resolution 0.1 volt 0.1 volt 0.
1000-1200 1 ±0.005% 60 Hz (Limited to 1000 for HV4) * Phase Angle 0 - 360° 0.5° ±3° B=240 C=120 * Current Limit 0 to Full0.5A to +5 to +15% Maximum Scale 200 Current 5.0A above 200 +5 to +15% Voltage Stability (24 Hrs) 0.25% FS, 15 minute warm-up Features • 1ø, 3ø operation - user configurable for single cabinet, factory/field configurable by manufacturer for multi-cabinet systems. • Remote Sense - allows correction for load wiring losses (up to 2% at full load).
• Panel Meter - analog voltmeter with output phase selector switch. • Function Sync - A 400 µs logic low output when any output is programmed.
Systems POWER CURRENT PER PHASE (IN AMPS) (At full output voltage) MODEL TOTAL VOLTAGE RANGE PER PHASE 135 156 270 312 400 (HV1) (HV2) (HV3) (HV4) FCS-18-3 18KW 6KW 44.4 38.4 22.2 19.2 15.0 FCS-18-1 18KW 18KW 133.2 115.2 66.6 57.6 45.0 FCS-36/2-3 36KW 12KW 88.8 76.9 44.4 38.4 30.0 FCS-36/2-1 36KW 36KW 266.4 230.7 133.2 115.2 90.0 FCS-54/3-3 54KW 18KW 133.2 115.4 66.6 57.6 45.0 FCS-54/3-1 54KW 54KW 399.6 346.2 199.8 173.1 135.
OUTPUT CURRENT VS OUTPUT VOLTAGE 10
CAUTION VOLTAGES UP TO 480 VAC ARE PRESENT IN CERTAIN SECTIONS OF THIS POWER SOURCE. THIS EQUIPMENT GENERATES POTENTIALLY LETHAL VOLTAGES. DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.
2. INSTALLATION AND ACCEPTANCE 2.1. UNPACKING Inspect the unit for any possible shipping damage immediately upon receipt. If damage is evident, notify the carrier. DO NOT return an instrument to the factory without prior approval. Do not destroy the packing container until the unit has been inspected for damage in shipment. 2.2. POWER REQUIREMENTS The AC Power System has been designed to operate from a three-phase AC line voltage.
Table 2-1: Input Transformer, Circuit Breaker, EMI Filter Configuration NOMINAL INPUT VOLTAGE TRANSFORMER CONNECTIONS CIRCUIT BREAKER EMI FILTER 208 (187 - 229) jumper 1, 5, 19, 23 jumper 3, 7, 9, 13 jumper 11, 15, 17, 21 100 amp 270162 250558 240 (216 - 264) jumper 1, 5, 20, 24 jumper 4, 8, 9, 13 jumper 12, 16, 17, 21 100 amp 270162 250558 380 (342 - 418) jumper 1, 22 jumper 2, 5 jumper 6, 9 jumper 10, 13 jumper 14, 17 jumper 18, 21 50 amp 270175 250567 415 (374 - 456) jumper 1, 23 jumper
2.5. OUTPUT CONNECTIONS 2.5.1. OUTPUT WIRING The output terminal block, TB3, is located at the rear of the power system. The external sense inputs allow the power system output voltages to be monitored directly at the load and must be connected. The external sense wires are connected at TB2 on the rear panel. Refer to Figure 2-1 for all connections.
Figure 2-1: FCS-18P Rear Panel Connections 15
Table 2-2: Wire Size LOAD CURRENT 45A 90A 135A 199A WIRE GAGE 8 AWG 4 AWG 2 AWG 0 AWG For multiple cabinet systems, refer to Figure 2-2 thru Figure 2-5 for connection details. 2.6. OUTPUT VOLTAGE RANGES The 0-135 Volt output is standard. The following outputs are available with an optional transformer: 0-156V, 0-270V, 0-312V, 0-400V 2.7. FUNCTION TEST Refer to Figure 2-6 for the test setup. Perform the following test sequence for 135 VAC output unit.
6) Apply full loads to each phase. Verify that the voltage of each phase remains within 0.135 volts of the no-load voltage. The waveforms shall still appear clean on the oscilloscope and have less than 2% distortion. (Full load is 3.0A per 6KVA phase at 135 volts output.) 7) Program the Current Limit to 25.0 amps: 8 ENT 25 PRG ENT 8) The display should show the error message 'CRL FAULT'. The output will default to a programmed value of 0.0 volts.
Figure 2-2: FCS-54-3/3 Cabinet 3 Phase System 18
Figure 2-3: FCS-54-1/3 Cabinet 1 Phase System 19
Figure 2-4: FCS-36-1/2 Cabinet 1 Phase System 20
Figure 2-5: FCS-36-3/2 Cabinet 3 Phase System 21
Figure 2-6: Power System FCS-18 22
3. OPERATION 3.1. GENERAL The AC Power System may be programmed from the front panel or through the IEEE-488 remote interface. The rear panel of the AC Power System holds the power input and output terminals, external sense connector, system interface connector, IEEE-488 interface connector and the chassis ground stud. 3.2. FRONT PANEL CONTROLS All front panel controls are shown in Figure 3-1. The front panel has two subpanels. A voltmeter selector switch is located on the left subpanel.
Figure 3-1: Front Panel Controls and Indicators 24
The right subpanel has a liquid crystal display and a REMOTE lamp. The liquid crystal display shows the numeric value of all programmed output parameters. It also shows all error messages and measured values. The REMOTE lamp illuminates when the AC power system has been addressed through the IEEE-488 interface (GPIB). 3.4. REAR PANEL CONNECTIONS (Refer to Figure 3-2 for all rear panel connections.) 3.4.1. POWER INPUT TB1 is the terminal block for the 3-phase input voltage.
3.4.4. IEEE-488 CONNECTOR J1 is the IEEE-488 (GPIB) connector for the AC system master only. 3.4.5. SYSTEM INTERFACE J2 is the System Interface connector. Table 3-3 identifies the pins of the System Interface connector.
J2 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Description CL A, Phase A DC current limit D COM, Digital common 270 4 FLT B, Phase B current limit fault FSTB HI, Function sync output HI EX SYNC HI, External sync input HI Solid State C, control the solid state option switch for Phase C. Solid State A, control the solid state option switch for Phase C.
Figure 3-2: FCS-18P Rear Panel Connections 28
J2-1 ANALOG COMMON: This is the common for all analog signals on the connector. J2-2 MRB: This is the input signal to the phase B amplifier from the internal oscillator drive signal. Make no connection to this pin except for troubleshooting. J2-3 ANALOG COMMON: See J2-1. J2-4 CSB: Current sum for the phase B output. Make no connections to the pin. J2-5 CT COMMON: J2-6 OSC B: This is the output from the internal phase B oscillator. Use this pin as an input if an oscillator is not installed. A 5.
J2-23 SHARE A: Make no connection J2-24 SHARE B: Make no connection J2-25 SHARE C: Make no connection J2-26 MRC: This is the input signal to the phase C amplifier from the internal oscillator drive signal. Do not make any connection to this pin except for troubleshooting. J2-27 MRA: This is the input signal to the phase A amplifier from the internal oscillator drive signal. Do not make any connection to this pin except for troubleshooting. J2-28 CSC: Current sum for the phase C output.
J2-39 EX SYNC HI: External Sync High signal. This is an input that can be used to synchronize the outputs of the AC Power System. This input requires a logic high level of at least +4.5 VDC at 5 MA. The input should have a duty cycle 50 ±30%. J2-15 is the common input. The External Sync input is optically isolated. It must also be enabled from the SNC screen. J2-40 Solid State C: Control the solid state option switch for Phase C. J2-41 Solid State A: Control the solid state option switch for Phase A.
3.5. FRONT PANEL OPERATION 3.5.1. KEYPAD The front panel keypad is enabled whenever the REMOTE light is not lit. The AC Power System may be manually programmed by using the keypad and observing the front panel LCD display. Figure 3-4 shows the front panel keypad. Table 3-4 lists each key and a brief description. While viewing any Output Parameter screen (Ref.Table 3-5), the screens may be viewed in increasing order by depressing the MON key and in decreasing order by depressing the PRG key.
Table 3-4: Keypad Key Description KEY SNW/0 SQW/1 INT/2 EXT/3 4 through 9 MNU/. A B C ↑/REG ↓/REC CLR/SRQ MON PRG ENT DESCRIPTION Inputs the value "0" for all output parameters or to select screen "0" when followed by the ENT key. Also used to select sine wave waveform. Inputs the value "1" for all output parameters or to select screen "1" when followed by the ENT key. Also used to select the square wave waveform.
3.5.2. DISPLAY SCREENS A display of data on the front panel LCD display is called a screen. There are five types of screens: menu, output parameter, measurement, calibration and configuration screens. Menu screens display the screen abbreviation with its equivalent number. The numeric value for each item in a menu screen is the code that may be used to select the screen. Table 3-5 through 3-8 show the numeric values for all screens. Without the aid of the tables the MNU key may be used.
Table 3-5: Output Parameter Screen NO. SCREEN EXT. ARGUMENT NAME The following are for changing the output: 1 SNC INT, EXT 2 DRP 4 RNG 5 AMP 6 FRQ 7 PHZ 8 9 A, B, C 1-5 Range limit A, B, C 0-RNG limit Sets the output frequency. A, B, C, 0-±999.9 Sets the output phase angle. CRL A, B, C Sets the output current limit. RMP A DLY 0 to MAX current 0.001-9999 RMP B NOTE: Selects phase A to be synchronized to an external input. Set the number of Drop Cycles.
Table 3-6: Measurement Screens NO. SCREEN EXT. ARGUMENT NAME The following are for measured values. 11 ELT H, M, S Hrs,Min,Sec 21 VLT A, B, C 0-400.0 22 CUR A, B, C 23 PWR A, B, C 24 PWF A, B, C 0.0-200.0 or 0000-2000 0.00-27.00KW or 0.0-270.0KW 0-1.000 25 APW A, B, C 26 FQM 27 PZM A, B, C ACTION TAKEN Reports the total accumulated run time up to 9,999 hours. Measures the TRMS output voltage. Measures the TRMS output current in Amps. Range depends on maximum current per phase.
Table 3-7: Calibration Screen NO. EXT. ARGUMENT 12 SCREEN NAME CAL AMP A, B, C 0 - 255 13 CAL VLT A, B, C 14 CAL CUR A, B, C 15 CAL PWR A, B, C Actual output voltage Actual output current (amps) Actual output power 20 POF A, B, C 0-±359.9 37 ACTION TAKEN Calibrates the programmed output voltage. Calibrates the measured voltage to be the same as argument. Calibrates the measured current to be same as argument. Calibrates the measured power to be same as argument.
Table 3-8: Configuration Screens NO. 16 17 18 19 29 SCREEN NAME CFG ALM FLM CLM INI EXT ARGUMENT ACTION TAKEN A(LSN) 0-30 B(CFG) *92 C(PHZ) *120 A(RNG) 0 B(LLM) *135 C(HLM) *135 A(FRQ) 60 Sets the IEEE-488 (GPIB) Listen Address. Defines the features enabled for Power Source compatibility. Defines the phase C initial value for power system configuration. Code that defines the default voltage range. Defines the upper limit of the lower voltage range.
3.5.3. OUTPUT PROGRAMMING 3.5.3.1. VOLTAGE RANGE (RNG=4) The RNG screen is used to select an upper voltage limit less than that specified by the ALM screen, HLM value. For an AC power system with a maximum voltage range of 270, set a program amplitude limit of 250 volts, by performing the key sequence below: 4 ENT 250 PRG ENT If the Programmable Range Change (PRC) Option is installed, the RNG screen has two purposes.
3.5.3.2.VOLTAGE AMPLITUDE (AMP=5) NOTE: The external sense lines must be connected to TB2 on the rear panel of the AC Power System. If they are not properly connected an OUTPUT FAULT message will result when the amplitude is programmed. Refer to Figure 2-6. The output voltage Amplitude may be programmed independently or simultaneously for each phase. Select the Amplitude (AMP) screen by entering keystrokes: 5 ENT The display now shows the AMP parameter screen: AMP MON B = 5.0 NOTE: A = 5.0 C = 5.
Program the output to 60.23 hertz: 60.23 PRG ENT To incrementally increase the output frequency to a desired value: ↑ (Hold until desired frequency is reached.) The output frequency may be programmed down to 17 Hz if the programmed voltage amplitude (AMP)is less than the full scale voltage range. The low frequency limit can be determined from the following formula: FRQ = 45 * (AMP)/Voltage Range 3.5.3.4.PHASE ANGLE (PHZ=7) Select the Phase (PHZ) screen by entering: 7 ENT Program phase C to .
NOTE The PHZ A value is maintained in nonvolatile memory. The last programmed value is retained at power-up. 3.5.3.5.CURRENT LIMIT (CRL=8) The Current Limit can be programmed independently or simultaneously for each phase of the AC Power system. 1. Select the Current Limit screen by entering: 8 ENT 2. Program all phases to 5 amps: 5 PRG ENT 3.5.3.6.
The following key sequence will program 130V for 2.5 seconds and then return to a final value of 115V. 1. Select the AMP screen and enable 130 volts to be programmed: 5 ENT 130 PRG (*) 2. Select the RMP screen, program a DLY of 2.5, a final VAL of 115 volts and run the program: 9 ENT A 2.5 PRG C 115 PRG ENT The next example will illustrate a ramp program. The following sequence will ramp the frequency from 60 hertz to 400 hertz in .1 hertz steps with a delay (DLY) for each step of .003 seconds.
(*)If the ENT key is depressed at this point, the AMP would be programmed to and remain at 130 volts. 5. Execute the program by depressing the ENT key. Two output parameters may be ramped simultaneously. The parameter programmed just prior to entering the RMP A screen will be the independent parameter and will be identified in that screen. The parameter loaded prior to the independent parameter will be the dependent parameter. The following example will ramp frequency from 360 to 440 Hz at a rate of .
FINAL AMP VALUE = 10 + .5 X 400 = 210 Volts If the final value exceeds the RNG value, an error message will be generated. NOTE Any ramp may be terminated at any time by depressing the ENT key. 3.5.3.7.EXTERNAL SYNCHRONIZATION (SNC=1) The SNC screen displays whether the external or internal SNC mode of operation has been selected.
The following program will program 135 volts and 60 hertz on all outputs for 10 seconds before reducing the output to 115 volts and store the test in register 0. 1. Select the FRQ screen and program 60 hertz: 6 ENT 60 PRG 2. Select the AMP screen and program 135 volts: 5 ENT 135 PRG 3. Select the RMP screen and program DLY = 10 and VAL = 115 9 ENT A 10 PRG C 115 PRG 4.
5. Store this program in Register 1: 1 REG ENT The second portion of the program will be stored in Register 2. 6. Select the FRQ screen and program 62 Hz: 6 ENT 62 PRG 7. Select the AMP screen and program 135 volts: 5 ENT 135 PRG 8. Select the RMP screen and program DLY = 0.01, STP = 0.1 and VAL = 115: 9. Store this program in Register 2: 2 REG ENT To initiate the program: 1 REC ENT 3.5.3.9.SIMULTANEOUS RAMPS Two outputs may be simultaneously ramped or stepped by enabling two parameter screens.
3. Select the RMP A screen and specify the ramp parameters of the independent parameter, FRQ, of DLY = .2 seconds, STP = .2 Hz and VAL = 440 Hz: 9 ENT A 0.2 PRG B 0.2 PRG C 440 PRG 4. Select the RMP B screen and specify the ramp parameter of the dependent parameter, AMP, of STP = .5 volts: 10 ENT B 0.5 PRG 5. At this point the program may be executed by depressing the ENT key or stored in a register. 3.5.3.10.
To set any of the default values, perform the following steps: 1. Depress the MNU key several times until the first menu screen is displayed as illustrated below: SNC = 01 RNG = 04 2. Enter the key sequence: 9 5 9 ENT 3.
To program the default Current Limit, perform steps 1 through 3. Next enter the key sequence: 2 9 ENT C At this point any value may be entered up to the maximum current available per phase.
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3.5.3.12.1 OR 3 PHASE MODE (MOD=30) The MODE selection is an optional feature. With this option the AC Power System may be programmed to either be a 1-phase or a 3-phase power system. CAUTION: Do not program the Phase Mode without first configuring the output wiring. Refer to Section 2. If the MODE Option is installed, relays will automatically change the output wiring between 1-phase and 3phase configurations.
3.5.4. ERROR MESSAGES Table 3-9 shows all of the possible error messages displayed on the front panel display. The cause of the error messsage is also shown. Table 3-9: Front Panel Display Error Messages ERROR MESSAGE CRL FAULT CAUSE Indicate output current exceeds program current. OUTPUT (1) FAULT Incorrect sense line connection. Overload on indicated output.
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3.6. OUTPUT MEASUREMENT Seven measurement screens display the output voltage, current, power, apparent power, power factor phase and frequency. The phase A, B and C output values are shown simultaneously for 3-phase systems. While viewing any measurement screen, except ELT, any other measurement screen may be displayed by repeatedly depressing either the MON or PRG key. The screen may also be displayed by entering its equivalent screen number followed by depressing the ENT key.
3.6.6. OUTPUT POWER FACTOR (PWF=24) This screen displays the power factor from 0 to 1.000 with 0.001 resolution. The PWF screen will read unity for loads less than 10 digits of apparent power on the Apparent Power (APW) screen. When this screen is displayed after another screen, it takes approximately two seconds to update the screen. 3.6.7. OUTPUT APPARENT POWER (APW=25) This screen is accessed by its screen number, 25. It displays KVA. 3.6.8.
Repeatedly depress the MNU key until the menu screen #5 is displayed as illustrated below: CFG = 16 FLM = 18 ALM = 17 CLM = 19 Enter the key sequence: 16 ENT The CFG screen will now be displayed. Depress the A key to display the present Unit Address. It may be changed to any value from 0 to 30 and will be stored in non-volatile memory. The new unit address will not be updated until power is shut off and reapplied to the power system.
Table 3-10: Commonly Used GPIB Abbreviations ABBREVIATION ATN CR DCL END EOI EOS GET GTL IFC LF LLO REN SDC DEFINITION Attention. A logic line on the GPIB asserted only by the controller to indicate the data on the bus represents a bus message. An ASCII carriage return. Device Clear. A universal bus message to initialize all instruments to their power-on states. End. A message conveyed when a talker uses the EOI line with the last data byte of a data string. End or Identify.
Table 3-11: Unit Address Group LISTEN ADDRESS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 UNL HEX 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F BINARY A5 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 001 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 A4 A3 A2 A1 DECIMAL ASCII 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0
3.7.3. NUMERIC DATA FIELD Parameter values may be sent as an unsigned value with a decimal point or a decimal point with an exponent. The phase value may be sent as a signed value. The Decimal Point for numeric data values may be either sent or inferred. The two following ASCII strings will represent 115 volts. AMP115 AMP115.0 There may be any number of digits following the decimal point, not to exceed the 256 byte DAM buffer, but only the Least Significant Digit (LSD) of resolution will be recognized.
Figure 3-5: Remote Command Sequences IEEE-488 PROGRAM SYNTAX TO PROGRAM OUTPUT PARAMETERS: −> AMP FRQ CRL RNG PHZ DRP − − A B C − (n) −> OPN −> SNC − INT −> −>REC−(n) −>REG-(n) −>* CLS CLK EXT -------------------------->------------>------------------------------>------------------------>---------------->---------> TO RAMP OR STEP ONE OUTPUT PARAMETERS: −> −> AMP FRQ CRL PHZ AMP FRQ CRL PHZ − − − A B C − A B C − (n) − −>STP − (n) − −>DLY − (n) − −>VAL − (n) − − −> * −>DLY − (n) − −>VAL − (n) −
Figure 3-4: Remote Command Sequences (continued) IEEE-488 PROGRAM SYNTAX TO SPECIFY THE SERVICE REQUEST INTERRUPT: − −>SRQ − (n) − − − > * TO CALIBRATE OUTPUT: −> −−− AMP − − − (n) − −>DLY − (n) −STP − (n) − >VAL − (n) − − − − −> * A B C − − − − − − − − − − − − − − − − − − − − − − − − −> * TO CALIBRATE MEASUREMENT: − −>CAL −> VLT CUR PWR − − − (n) − − − −> * A B C TO REQUEST TALKING A PROGRAMMED PARAMETER OR MEASURED VALUE: − −>TLK −> AMP − FRQ CRL RNG PHZ SNC CLK MNU ELT VLT CUR PWR APW PWF ALM FL
Table 3-12: Program Headers HEADER AMP EXTENSION A, B, C CAL CAL VLT A, B, C A, B, C ARGUMENT # or numeric from 0.0 to RNG value 0 - 255 Actual voltage CAL CUR CAL PWR CRL A, B, C A, B, C A, B, C Actual current Actual power 0 to maximum DLY 0.000 to 9999 FRQ 45.00 to 1200 PHZ PRG REC A, B, C REG RNG 0 through 15 A, B, C SNC DRP 0 to 999.0 0 through 15 0 through 15 A, B, C 0.
HEADER TRG EXTENSION OPN DEFINITION Execute (Trigger) set-up parameters on GPIB "GET" message. Final ramp or step value in volts, hertz, amps, degrees,sine wave or square wave. Open output relays. CLS Close output relays. VAL VLT ARGUMENT From parameter minimum to maxi mum value A, B, C Used with TLK to request measurement of the output voltage. Used with TLK to request total accumulated run time. Used with TLK to request measurement of the outputload current.
3.7.5. OUTPUT PROGRAMMING 3.7.5.1.OUTPUT VOLTAGE AMPLITUDE (AMP) The AMP header with the optional A, B or C extension is used to identify the amplitude command. The argument is a numeric data field from 0.0 to the limit set by the RNG value. An attempt to program a value higher than this value will generate an error and a SRQ on the GPIB. The following ASCII strings will program the voltage given in the left column: A,B,C 0.0 volts AMP0 or AMPA0AMPB0AMPC0 A,B,C 10.5 volts AMP10.5 or AMP1.
The following example will program phase B to 240.5 degrees and phase C to 119.3 degrees leading phase A. PHZB 240.5 PHZ C 119.3 The PHZA value can be used to control the point of the phase A waveform where the change will occur. The following string will drop the phase A waveform at 90 degrees for one (1) period of programmed frequency: PHZA 90 DRPA 1 The following example will program the phase A output voltage to 135 volts for 0.017 seconds starting at the 90 degree point of the waveform.
When an AMP header with an argument of 0 is used, the waveform will stop and drop to zero volts at the point specified by the PHZ A value. The following ASCII string will stop the waveform at 0 degrees for .01 seconds and return to 115 volts: PHZ A 0 AMP 0 DLY .01 VAL 115 The STP header is used to identify the following argument numeric value as the increment or decrement value for a FRQ, CRL, AMP, PHZ, THD, or CAL ramp. The following example will ramp all outputs from 130 volts in 1.5 volt/.5 sec.
The following ASCII string will program the phase A output to 0 degree relative to the external sync input and select the external sync mode. PHZA0 SNC EXT Sending the ASCII string SNC INT will disable the sync input. 3.7.5.7.DROP CYCLE (DRP) The DRP header is used to identify the Drop Command. The argument is a numeric data field from 1 to 5. The following string will drop the output voltage for phase B for five complete cycles and start at 0 degree of the wave form PHZ 0 DRP B 5 3.7.5.8.
AMP135.0 CALA# DLYSTP1 VAL0 Again the ramp must be terminated with the bus “GET” meassage when the external AC calibration DVM indicates the correct voltage. The CAL header is used with the headers VLT, CUR and PWR to calibrate the respective measurement function. An A, B or C extension follows the headers to designate a specific measurement channel. If the extension is omitted, the calibation coefficeints for all measurement channels will be the same and will depend on only value for phase A.
The following is an example of register linking. The voltage and frequency is maintained at 115 volts and 60 Hz for 5 seconds and then the program contained in register 0 is recalled and executed. The program is stored in register 1. FRQ60 AMP115 DLY5 VAL115 REC0 REG1 The program is initiated by the following ASCII string: REC1 3.7.5.11.VOLTAGE RANGE (RNG) The RNG header is used to set an amplitude limit. The numeric value following the RNG header will define the upper limit for the AMP value.
The following example will program the default frequency to 400 Hz. FLM A 400 3.7.5.14.TO PROGRAM THE DEFAULT OUTPUT VOLTAGE (INI A) The default voltage is the output voltage after power-up, IEEE-488 Device Clear or an Amplitude fault. The following example will program the default voltage to 5 volts. INI A 5 NOTE: If the default voltage is programmed to a value less than 5 volts, the settling time will increase.
3.7.5.17.TO TALK (TLK) MEASURED AND PROGRAMMED DATA The TLK header will setup the AC Power System to talk data. The TLK header will setup the AC Power System to report a programmed output parameter if the program header is the argument for the TLK header. To setup the AC Power System to report a measured value, attach a measurement header as the TLK argument. The measurement headers are VLT, CUR, PWR, APW and PWF with an A, B or C extension and FQM with no extension.
3.7.5.20.TO TALK THE MEASURED OUTPUT POWER (TLK PWR) PWR may be used as an argument to the header TLK with an A, B or C extension. When used as an argument, it will set up the AC Power System to measure the output power in kilowatts. When PWR is used as a header in a string with no argument, it will cause the front panel to display the output power. 3.7.5.21.TO TALK THE MEASURED OUTPUT POWER FACTOR (TLK PWF) PWF may be used as an argument to the header TLK with an A, B or C extension.
3.7.5.24.TO TALK THE MEASURED OUTPUT PHASE ANGLE (TLK PZM) PZM may be used as an argument with an extension A, B or C for the header TLK. When used as an argument, PZM will set up the AC Power System to measure the phase angle of phase B and C relative to phase A. The measurement is made at the External Sense terminals. Phase A is the reference phase and will always be reported as 000.0 degrees unless the AC Power System is operating in the external sync mode.
Table 3-13: TLK Arguments ARGUMENT EXT DATA REPORTED ALM A B C 0 *135.0 *135.0 AMP DEFINITION Default voltage range code. Voltage Range limit High Voltage Range. 0 to 270.0 Programmed voltage Amplitude value in volts. APW A,B,C 0 to maximum apparent power in KVA CFG A B C 0 to 30 *92 *120 CLM A See MAXIMUM CURRENT TABLE 2 1 B C Output KVA IEEE-488 Listen Address Configuration Code Phase C initial Value.
ARGUMENT EXT DATA REPORTED PWR A, B, C 0 to MAX POWER PZM A, B, C 0 to 359.9 REG 0 to 15 Contents of Reg RNG None 0 to 270.0 SRQ None 0, 1 or 2 Programmed SRQ status VLT A, B, C 0.0 to 400.0 Measured output voltage (*) DEFINITION Output KW Measured phase B and C output phase angle relative to A. A is always 0.0 Talk contents of register Programmed range and limit Standard values shown. Values will be different for other ranges, output power and options.
Table 3-14: Example Talk Response (3-Phase System) ASCII STRING SENT TLK ALM RESPONSE AFTER ADDRESSED TO TALK ALMA0000 B135.0 C135.0 TLK AMP AMPA000.0 B000.0 C000.0 TLK APW APWA10.03 B0985 C1507 TLK CFG CFGA0001 B0156 C0120 TLK CRL CRLA44.44 B44.44 C44.44 TLK CUR CURA030.1 B027.5 C041.5 TLK ELT ELTH0147 M0051 S0033 TLK FLM FLMA0060 B0045 C0550 TLK FQM FQM59.97 TLK FRQ FRQ60.00 TLK SNC SNC INT TLK PHZ PHZA000.0 B240.0 C120.0 TLK PWF PWFA1.000 B1.000 C1.
3.7.5.25.MESSAGE SEPARATORS A complete message consists of a header and an argument. Since more than one message can be sent in a setup string, message separators included in the string between the message will make it more readable to the human operator. Three message separators are recognized: the comma (,), semicolon (;) and a space. Since these separators are ignored, they may be dispersed throughout a setup string.
3.7.5.28.END OF STRING The End of String (EOS) delimiter recognized by the AC Power System is the ASCII Line Feed (LF). Carriage Return (CR) followed by Line Feed may also be used for EOS. The End or Identify (EOI) IEEE-488 message END will also be recognized. The END message is sent by setting the IEEE-488 End or Identify line true with the last data byte. 3.7.5.29.ERROR MESSAGES Table 3-15 shows all of the possible error messages that can be generated by the AC Power System.
Table 3-15: Status Byte Values SRQ 1 0 REPORTED MESSAGE CAUSE STATUS BYTE 64 65 66 67 68 69 70 0 1 2 3 4 5 6 OUTPUT A FAULT OUTPUT B FAULT OUTPUT AB FAULT OUTPUT C FAULT OUTPUT AC FAULT OUTPUT BC FAULT OUTPUT ABC FAULT 72 8 MODULE FAILURE 90 26 RNG RANGE ERROR RNG value greater than highest range 91 92 27 28 AMP RANGE ERROR FRQ RANGE ERROR AMP value greater than RNG value FRQ value is less than 45 or greater than 550.
CAUTION VOLTAGES UP TO 480 VAC ARE PRESENT IN CERTAIN SECTIONS OF THIS POWER SOURCE. THIS EQUIPMENT GENERATES POTENTIALLY LETHAL VOLTAGES. DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.
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4. CALIBRATION PROCEDURE 4.1. GENERAL The calibration is divided into two categories; a periodic and a nonperiodic calibration. The periodic calibration should be performed at a 1 year interval. The nonperiodic calibration should only be performed if the periodic calibration cannot be performed or if an adjustable subassembly is replaced. The following is a listing of paragraphs that may be performed to fix an indicated problem.
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4.2. TEST EQUIPMENT The following equipment or their equivalents are required to completely test the AC Power System. TEST EQUIPMENT FOR PERIODIC CALIBRATION 1. Digital Voltmeter: Fluke Model 8840A (modified per CIC005) or equivalent. 2. 100 Amp Current Transformer: 3. Resistive Loads: Full resistive load value from Table 4-1 4. Extender Board: California Instruments part number 5000-709-1 Pearson Model 3468 ADDITIONAL TEST EQUIPMENT 1. Frequency Counter: Philips PM 6671 2.
Figure 4-1: Gain Adjustment Potentiometer Location 86
Figure 4-2: Front Panel/ Keyboard Display Removal Trim Capacitor C43 on phase A (Printed Circuit Board.
Table 4-1: Full Resistive Load Table CONFIGURATION STD, 135V -HV1, 156V -HV2, 270V -HV3, 312V -HV4, 400V SINGLE CABINET SINGLE-PHASE 1.01Ω 18KW 1.35Ω 18KW 4.05Ω 18KW 5.41Ω 18KW 8.89Ω 18KW SINGLE CABINET THREE-PHASE 3.04Ω 6KW 4.06Ω 6KW 12.2Ω 6KW 16.2Ω 6KW 26.7Ω 6KW TWO CABINET SINGLE-PHASE 0.506Ω 36KW 0.676Ω 36KW 2.03Ω 36KW 2.70Ω 36KW 4.44Ω 36KW TWO CABINET THREE-PHASE 1.52Ω 12KW 2.03Ω 12KW 6.08Ω 12KW 8.11Ω 12KW 13.3Ω 12KW THREE CABINET SINGLE-PHASE 0.338Ω 54KW 0.451Ω 54KW 1.
4.3. PERIODIC CALIBRATION The following periodic calibration adjustments should be performed on a 1 year interval. 4.3.1. VOLTAGE CALIBRATION Apply power to the AC Power System and allow at least fifteen minutes for temperature stabilization. Program the output to 60 Hz , 135 volts and perform the following steps: 1) Connect the AC voltmeter to the phase to be calibrated. 2) Depress the MNU key several times until the first menu screen is displayed as illustrated below.
2. Depress the MNU key several times until the Menu screen is displayed as illustrated below: SNC = 01 RNG= 04 3. Enter the key sequence: 959 ENT. 4. Depress the MNU key several times until the configuration menu screen is displayed. CFG = 16 FLM = 18 ALM = 17 CLM = 19 5. Enter the key sequence 13 ENT to access the CAL VLT screen. 6. Example: If the maximum output voltage is 135 volts and if all phases of the voltage measurement are to be calibrated to 135.
Figure 4-3: Equipment Hookup for Periodic Calibration 91
4.3.3. CURRENT MEASUREMENT CALIBRATION For calibration of current measurement perform the following steps: 1. Program 60 Hz, 135.0 volts and the maximum Current Limit value. 2. If any calibration screen is already displayed, the Current Calibration screen (CAL CUR) may be displayed by repeatedly depressing either the MON or PRG keys and then skip to step 6. If a calibration screen is not displayed, press the MNU key several times until the screen shown below is displayed: SNC = 01 RNG = 04 3.
(Measured phase C current) C PRG ENT 4.3.4. POWER MEASUREMENT CALIBRATION For calibration of power measurement perform the following steps: 1. Program 60 Hz and 135.0 volts and the maximum Current Limit value. 2. If any calibration screen is already displayed, the Power Calibration screen (CAL PWR) may be displayed by depressing either the MON or PRG keys and then skip to step 6.
(Measured phase C power) C PRG ENT 4.3.5. REMOTE MEASUREMENT CALIBRATION The measurement function of the AC Power System may be remotely calibrated. The equipment hookup is the same as before except an IEEE-488 Controller must be used to program the AC Power System. The values for the VLT, CUR and PWR strings must be derived from the external AC Digital Voltmeters and Current Transformer. To calibrate the measured voltage, first program the AC Power System to 135.0 volts and 60 Hz.
Figure 4-4: Flow Diagram 95
96
4.4. NONPERIODIC CALIBRATION A nonperiodic calibration will only be required if a related assembly is repaired or if the performance is out of specification. 4.4.1. OUTPUT FREQUENCY CALIBRATION Connect the Frequency Counter to the phase A output. Program the output to 135.0 volts and 400.0 Hz. Engage the low-pass filter on the Frequency Counter to obtain the output frequency. If the Frequency Counter does not indicate 400.000 ±0.004 Hz, adjust C43 for the correct frequency. Refer to Figure 4-2. 4.4.2.
4.4.3. OUTPUT PHASE ANGLE CALIBRATION The phase calibration values for phases B and C are entered on the Phase Offset (POF) screen. To calibrate the output phase angle, connect either a Phase Meter or an oscilloscope between the phase to be calibrated and the phase A output. Program the phase B or C value to be calibrated from the Phase screen (PHZ). If an oscilloscope is used the calibration is best performed with a programmed angle of 0 degrees. To calibrate the output phase angle, program 120.
5. THEORY OF OPERATION 5.1. GENERAL An explanation of the circuits within the AC Power System is given in this section. Refer to Figure 5-1 for a block diagram of the AC Power System. 5.2. OVERALL DESCRIPTION Input power from the rear panel is routed through an EMI filter, the circuit breaker, and to the input transformer, T1. The input transformer provides three isolated six phase supplies each of which are rectified to supply 300 VDC for the power amplifiers.
Figure 5-1: AC Power System Block Diagram 100
Figure 5-2: Programmable Oscillator Module 101
5.4. CPU/GPIB BOARD The CPU/GPIB board, A2A3, provides the control and measurement functions of the module. A microprocessor circuit accepts commands from the GPIB and the front panel keyboard. It sends digital programming information to set the output parameters of the power source. Data from measurement circuits is accepted and reported to the display and GPIB. Measurement calibration coefficients are stored in a memory backed up by a battery. The battery has a 10 year life expectancy.
5.6. PHASE B/C BOARD The Phase B/C board, A2A4, uses the DC voltage references and programmable clock from the Phase A/Ref board to generate the Phase B and C oscillator waveforms. External sense circuits control the Phase B and C output amplitudes. 5.7. DISPLAY BOARD The Display Board, A2A1, is connected to the oscillator mother board by a short ribbon cable. The Display Board holds the 20 button keyboard and a 32 character liquid crystal display.
5.9. MOTHER BOARD The mother board, A6, has no active circuits. This board connects signals between the oscillator assembly, current limit assembly, the three power amplifiers, current transformer assembly, GPIB and system interface connectors, and the isolated three phase AC power. 5.10. POWER AMPLIFIERS The AC power system has three power amplifiers, A3, A4, and A5. In the three phase mode, one amplifier is used for each of the three outputs.
5.12. AUXILIARY POWER SUPPLY The auxiliary power supply uses the 300 VDC bus to generate all of the low voltage DC supplies needed for amplifier operation. This switching supply delivers the following voltages: 1) ±15 VDC to the control board 2) +16 VDC to the lower gate drives on the front and rear amplifier boards 3) +16 VDC to the top rear amplifier 4) +16 VDC to the top front amplifier 5) +24 VDC to the DC fan. All five DC supplies are isolated from one another.
Power amplifier switch current is sensed by current transformers and used on the control board to provide peak and average current limiting. Thermal switches mounted to the amplifier heat sink and one of the snubber resistors are used to sense overtemperature conditions. If either of the switches is activated, the amplifier output is disabled until the overheated component cools down. A power supply comparator on the control board disables the amplifier output if the supply is below a safe level. 5.15.
Figure 5-3: Theory of Operation Exploded Layout 107
CAUTION VOLTAGES UP TO 480 VAC ARE PRESENT IN CERTAIN SECTIONS OF THIS POWER SOURCE. THIS EQUIPMENT GENERATES POTENTIALLY LETHAL VOLTAGES. DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.
6. MAINTENANCE AND TROUBLESHOOTING 6.1. GENERAL This section describes the suggested maintenance and troubleshooting procedures. Table 6-1 lists the paragraph titles and page numbers for the Troubleshooting section. If the AC Power System does not appear to function normally, use this section to isolate the problem. If the problem cannot be found using these steps, consult the factory. Table 6-1: Troubleshooting Procedures PARAGRAPH 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6.2.
6.3. POOR OUTPUT VOLTAGE REGULATION If the AC Power System exhibits poor voltage regulation the following item may be at fault: 1. The External Sense lines are not connected at the same point monitored by the external voltmeter used for load regulation check. SOLUTION: Connect AC voltmeter to External Sense lines. If the AC Power System exhibits poor voltage regulation in the single phase mode driving more than approximately 15% of rated load, the following items may be at fault: 1.
SOLUTION: Observe amplifiers from the front of the power source cabinet. Note the condition of the green LED on the upper left side of each amplifier front panel. The green LED is normally on. A module fault in a specific amplifier is indicated when its LED is not on. Replace the fuse or amplifier whose LED is not lit. Refer to paragraph 6.11. 6.5. OVERTEMPERATURE LAMP ON If the power source OVERTEMP lamp is on, the following may be at fault: 1. Ambient temperature is too high.
6.7. CAN'T PROGRAM AC POWER SYSTEM ON GPIB If the power source does not respond to IEEE-488 GPIB programming, the following items may be at fault: 1. The power source unit address is wrong. SOLUTION: Update address. See paragraph 3.7.1. 2. GPIB cable is loose at power source rear panel. SOLUTION: Check connection, tighten jack screws. 3. The oscillator has failed. SOLUTION: Replace the oscillator. See Paragraph 6.10. 6.8.
2. When the output is overloaded an error message will be generated. SOLUTION: Remove the overload. Observe the output power capabilities. Refer to Section 1. 3. There is no input to the power amplifiers from the oscillator. Check the oscillator signals at the system interface connector: J2-31 J2-6 J2-30 J2-7 Oscillator Phase A Oscillator Phase B Oscillator Phase C Oscillator common/return Program maximum output voltage. The three signals should be 5.0 ±0.10 VAC.
6.10. OSCILLATOR ASSEMBLY REMOVAL/REPLACEMENT If a fault is found that requires the replacement of the oscillator assembly, perform the following steps. Refer to Figure 6-1. 6.11. 1. Turn off the front panel circuit breaker. 2. Unscrew the two captive screws holding the oscillator panel to the cabinet panel. 3. Unplug the oscillator module from the front panel. 4. To replace the assembly follow the above steps in reverse order.
5. Unplug the heavy gauge 4-wire connector from the failed amplifier. 6. Unplug the 16-pin ribbon cable from the failed amplifier. 7. Remove the #8 screw that holds the back flange of the failed amplifier to the amplifier module rack. 8. Withdraw the amplifier from the front of the cabinet. 9. To replace the amplifier, follow the above steps in reverse order. 10. Check the input and output fuses associated with the failed amplifier. They may have blown open and must be replaced.
Figure 6-1: Cabinet Front View, Door Removed 116
Figure 6-2: Fuse Locations, Right Side Panel Removed 117
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7. REPLACEABLE PARTS 7.1. GENERAL This section contains ordering information and a list of replaceable parts. The list includes the parts description and California Instruments part numbers. 7.2. ORDERING INFORMATION In order to ensure prompt, accurate service, please provide the following information, when applicable for each replacement part ordered. a. Model number and serial number of the instrument. b. c. California Instruments part number for the subassembly where the component is located.
TOP ASSEMBLY REPLACEABLE PARTS FOR FCS-18-3P TOP ASSEMBLY NO: 5000-400-1/-2 SEQ NO. A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 CR1 CR2 CR3 CR4 CR5 CR6 F1 F2 F3 F4 F5 F6 F7 F8 F9 COMPONENT ITEM NO.
8. MIL-STD-704D 8.1. GENERAL The MIL-704D option is capable of performing all sections of MIL-STD-704D. It will perform all tests in the order listed below or part of the test. There is a 5 second delay between tests to allow the operator to evaluate the result of the test. 8.2. INITIAL SETUP Nominal parameters for the AC Power Source shall be as follows: 8.3. OUTPUT VOLTAGE: 115 L-N OUTPUT FREQUENCY: 400 OUTPUT PHASE ANGLE: B 240 C 120 TEST PERFORMED 8.3.1. STEADY STATE TEST.
8.3.3. ABNORMAL OPERATION 1. Abnormal voltage (Refer to MIL-704D Doc. Figure 7, page 134). Overvoltage per Figure 10, page 136. Undervoltage per Figure 11, page 136. 2. Abnormal frequency (Refer to MIL-704D Doc. Figure 8, page 135) Overfrequency per Figure 12, page 137. Underfrequency per Figure 13, page 137. 8.3.4. EMERGENCY OPERATION (REFER TO MIL-704D DOC. 5.2.5) 1. Voltage per Figure 14, page 138. 2. Frequency per Figure 15, page 138. 8.4.
Press MNU to Select Test The MNU screen has two lines of selection shown at a time. There are 3 different types of operations that can be selected from a MENU acreen. If the word MENU appears for the item selected, another MENU screen will be displayed. If the word TEST appears for the item selected, the test will start. The display will return to the previous screen if the word RETURN appears for the item selected.
If key 2 is selected from the Transient Menu the following Menu will appear: 1=High Freq Test 2=Low Freq Test 3=Freq Trns Test 4=Return If key 3 is selected "Abnormal" from the Main Menu, the following Menu will appear: 1=Abnl Volt Menu 2=Abnl Freq Menu 3=Abnormal Test 4=Return to Main Menu If key 1 is selected from the "Abnormal" Menu, the following Menu will appear: 1=Overvolt Test 2=Undervolt Test 3=Abnl Volt Test 4=Return If key 2 is selected from the "Abnormal" menu, the following Menu will appear: 1=O
8.5. GPIB OPERATION (Refer to syntax diagram) The following command will be used to execute the appropriate part of all of the test.
8.6. TEST SPECIFICATION 8.6.1. STEADY STATE 1. Steady state voltage test (Figure 1, page 133). MIL704D[A][B][C] :STEady state :VOLTage This test will change the output voltage simultaneously from 115 volts to 108 volts for 5 seconds to 118 volts for 5 seconds. The unselected phases will remain at 115 volts. 2. Steady state voltage unbalance test (Figure 2, page 133).
6. Steady state test MIL704D[A][B][C] :STEady state This test will perform all the above five tests in the same order above. A 5 second pause between tests is asserted. 8.6.2. TRANSIENT 1. Transient high voltage test (Figure 6, page 134). MIL704D[A][B][C] :TRANsient :VOLTage :HIGH This test requires a power source with a voltage range of 180 volts or higher. A range change will take place if the power source is not set for the high range.
4. Transient high frequency test (Figure 8, page 135). MIL704D :TRANsient :FREQuency:HIGH This test will step up the frequency from 400 Hz to 425 Hz. The frequency will step down to 400 Hz in the following sequence: 425 Hz for 1 second 420 Hz for 4 seconds 410 Hz for 5 seconds 407 Hz for 4 seconds 5. Transient low frequency test (Figure 9, page 135). MIL704D :TRANsient :FREQuency:LOW This test will step down the frequency from 400 Hz to 375 Hz.
The output will go to 180 volts for 50 msec and will drop gradually to 125 volts in 450 msec. The output voltage will remain at 125 volts for 9.5 seconds before it drops to 115 volts. After 5 seconds, a range change will take place to the original setup. This is a simultaneous test to all selected phases. 2. Abnormal undervoltage test (Figure 11, page 136). MIL704D[A][B][C] :ABNormal :VOLTage :UNDer The output voltage will drop to 0 volts for 7 seconds.
6. Abnormal frequency test MIL704D :ABNormal :FREQuency This test will combine the Abnormal overfrequency and the Abnormal underfrequency . There is a pause for 5 seconds between tests. 8.6.4. EMERGENCY 1. Emergency voltage test (Figure 14, page 138). MIL704D[A][B][C] :EMERgency :VOLTage This test will step down the voltage to 104 volts for 5 seconds. Also it will step up the voltage to 122 volts for another 5 seconds. 2. Emergency frequency test (Figure 15, page 138).
Figure 8-1: Flow Diagram 131
Figure 8-2: Syntax Flow 132
Figure 8-3: Figure 1,2,3,4,5 133
Figure 8-4: Figure 6,7 134
Figure 8-5: Figure 8,9 135
Figure 8-6: Figure 10,11 136
Figure 8-7: Figure 12,13 137
Figure 8-8: Figure 14,15 138
9. RTCA/DO-160C 9.1. GENERAL The RTCA/DO-160C option is capable of performing all sections of RTCA/DO-160C for the AC Source signal. 9.2. INITIAL SETUP Nominal parameters for the AC Power source shall be as follows: Output Voltage Output Frequency Output Phase Angle 9.3. 115V L-N 400 Hz B 240 C 120 TEST PERFORMED 9.3.1. NORMAL STATE 1. 2. 3. 4. 5. 6. 7.
9.3.3. ABNORMAL TEST 1. 2. 3. 9.4. Abnormal Voltage and Frequency test Momentary Undervoltage test Voltage Surge test KEYPAD ENTRY (Refer to Figure 9-1 for Keyboard Flow Chart) To perform a test from the keyboard, the following key sequence is required: 160 ENT The following screen will appear: DO160C: Sel A, B, C ENT = all CLR = EXIT Pressing the A, B, C or any combination selects the phase in test. Press ENT without the phase select for simultaneous three phase test.
There are three different types of operations that can be selected from the MENU screen. If the word MENU appears for the items selected, another MENU screen will be displayed. If the word Test appears for the item selected, the test will start. The display will return to the previous screen if the word RETURN appears for the item selected.
If Key 1 is selected "Volt/Freq Menu" from the Emergency Menu, the following Menu will appear: 1 = Emg Vunder Test 2 = Emg Vover Test 3 = Return If Key 1 is selected "Volt Menu" from the Abnormal Menu, the following Menu will appear: 1 = Ab Vunder Test 2 = Ab Vover Test 3 = Return 142
If Key 3 or Key 7 is selected from the "Normal Menu", another screen will appear as follows: Enter Modulation Rate in Hz and ENT. The numeric value must be within the limits for the test performed. See Figure 9-2 and Figure 9-3. If Key 4 is selected from the "Normal Menu", the following screen will appear as follows: Enter Test Number 1 to 15 and ENT (see Figure 9-4) 9.5. GPIB OPERATION The following command will be used to execute the appropriate section of DO-160C.
9.6. TEST SPECIFICATION 9.6.1. NORMAL STATE 9.6.1.1.NORMAL STATE MINIMUM VOLTAGE AND FREQUENCY TEST DO160[A][B][C] :NORMal state :VOLT_FREQ :MINimum This test will change the output voltage for single phase from 115V to 104V and for three-phase from 115V to 105.5V and the frequency from 400 Hz to 380 Hz. The test will last for 30 minutes. The CLR Key in local operation will terminate the test at any time. Group execute trigger will terminate the test remotely.
9.6.1.5.NORMAL STATE VOLTAGE MODULATION DO160[A][B][C] :NORMal state :VOLTage :MODulation This test requires a numeric value equal to the modulation rate in Hz. See Figure 9-2. The amplitude modulation is calculated based on the modulation rate. This test will last for 2 minutes. 9.6.1.6.NORMAL STATE FREQUENCY MODULATION DO160[A][B][C] :NORMal state :FREQency :MODulation This test requires a numeric value equal to the modulation rate in Hz. See Figure 9-3.
9.6.2. EMERGENCY TEST This test could be performed in addition to the Normal State test for equipment designed to operate under emergency electrical system. 9.6.2.1.EMERGENCY STATE MINIMUM VOLTAGE AND FREQUENCY TEST DO160[A][B][C] :EMERgency :VOLT_FREQ :MINimum This test is similar to the test at 6.1.1 except the output frequency changes from 400 Hz to 360 Hz. 9.6.2.2.EMERGENCY STATE MAXIMUM VOLTAGE AND FREQUENCY TEST DO160[A][B][C] :EMERgency :VOLT_FREQ :MAXimum This test is similar to the test at 5.1.
This test will raise the output voltage from 115 volts to 135 volts for 5 minutes. 9.6.3.3.ABNORMAL STATE UNDERVOLTAGE DO160[A][B][C] :ABNormal stage :VOLTage :UNDer This test will drop the output voltage from 115 volts to 60 volts for 7 seconds. 9.6.3.4.ABNORMAL STATE VOLTAGE SURGE DO160[A][B][C] :ABNormal state :VOLTage :OVER This test requires an output voltage range of 180 volts.
Figure 9-1: Keyboard Flow Diagram 148
Figure 9-2: Frequency Voltage 149
Figure 9-3: Frequency Modulation 150
Figure 9-4: Table 1 151
ONE YEAR WARRANTY CALIFORNIA INSTRUMENTS CORPORATION warrants each instrument manufactured by them to be free from defects in material and workmanship for a period of one year from the date of shipment to the original purchaser. Excepted from this warranty are fuses, and batteries which carry the warranty of their original manufacturer where applicable.
