3300 Series DC Power Supplies Operation Manual PowerTen 9250 Brown Deer Road San Diego, CA 92121-2294 1-800-978-6680 Tel: (858) 458-0253 Fax: (858) 458-0237 Email: sales@powerten.com www.powerten.com ©2002 by PowerTen. This document contains information proprietary to PowerTen. The information contained herein is not to be duplicated or transferred in any manner without prior written permission from PowerTen. January 11, 2002 Document No.
Safety Notice Before applying power to the system, verify that the unit is configured properly for the user's particular application. The 3300 series of power supplies is intended for rack mounted application only. Use of the power supplies outside of a rack mount enclosure will expose the user to high voltage and/or high current sources. Extreme caution must be used under these circumstances.
SERVICE SAFETY NOTICES WARNING! HAZARDOUS VOLTAGES IN EXCESS OF 480 V RMS, 700 V PEAK MAY BE PRESENT WHEN COVERS ARE REMOVED. QUALIFIED PERSONNEL MUST USE EXTREME CAUTION WHEN SERVICING THIS EQUIPMENT. CIRCUIT BOARDS, TEST POINTS, AND OUTPUT VOLTAGES MAY BE FLOATING ABOVE CHASSIS GROUND. WARNING! TO GUARD AGAINST RISK OF ELECTRICAL SHOCK DURING OPEN COVER CHECKS, DO NO TOUCH ANY PORTION OF THE ELECTRICAL CIRCUITS. EVEN WHEN THE POWER IS OFF, CAPACITORS CAN RETAIN AN ELECTRICAL CHARGE.
FCC NOTICE This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
About This Manual This manual has been written expressly for the Power Ten 3300 Series of power supplies.
TABLE OF CONTENTS Chapter 1 DESCRIPTION OF EQUIPMENT____________________________________ 1-1 1.1 PURPOSE AND CAPABILITIES _______________________________________________ 1-1 1.2 TECHNICAL CHARACTERISTICS_____________________________________________ 1-1 Chapter 2 INSTALLATION __________________________________________________ 2-1 2.1 INSPECTION _______________________________________________________________ 2-1 2.2 INPUT/OUTPUT CONNECTORS ______________________________________________ 2-1 2.
LIST OF TABLES TABLE 1-1 3300 SERIES TECHNICAL CHARACTERISTICS ...................................................... 1-2 TABLE 1-2 3300 SERIES TECHNICAL CHARACTERISTICS ...................................................... 1-4 TABLE 2-1 3300 SERIES INPUT/OUTPUT CONNECTORS ........................................................ 2-2 TABLE 3-1 3300 SERIES CONTROLS AND INDICATORS.......................................................... 3-5 TABLE 3-2 BARRIER STRIP (TB1) DESIGNATIONS AND FUNCTIONS ...........
Chapter 1 DESCRIPTION OF EQUIPMENT 1.1 PURPOSE AND CAPABILITIES The Power Ten 3300 Series power supplies are general purpose power supplies designed specifically for laboratory test and systems applications requiring variable DC sources with good regulation and low output ripple characteristics. Models of the 3300 Series are constant current/constant voltage supplies with an automatic crossover feature. They provide up to 1000 watts of DC power over a wide range of voltage and current levels. 1.
Table 1-1 3300 Series Technical Characteristics PARAMETERS SPECIFICATIONS PHYSICAL CHARACTERISTICS: Width Depth Height Weight 19.00 in. 18.50 in 1.75 in. 15 lb. max. ELECTRICAL CHARACTERISTICS: Input Power (Standard) Voltage Frequency Phases 95 to 127 VAC, 190 to 253 VAC (Option) 47 to 63 Hz Single, 2-wire plus gnd Regulation (Line or Load) Voltage Current 0.1% of max. output voltage 0.1% of max. output current Noise and Ripple (RMS) 30 mV max.
Table 1-1 3300 Series Technical Characteristics - Continued PARAMETERS SPECIFICATIONS Remote Programming Resistive: Constant Voltage (0-100%) Constant Current (0-100%) 0 - 5k ohms 0 - 5k ohms Voltage: Constant Voltage (0-100%) Constant Current (0-100%) 0 - 5 VDC 0 - 100 mV Current: Constant Voltage (0-100%) Constant Current (0-100%) 0 - 1 mA 0 - 1 mA Remote Sensing Terminals are provided to sense output voltage at point of load. Maximum line drop 3% of rated voltage per line.
Table 1-2 3300 Series Technical Characteristics MODEL NUMBER OUTPUT DC VOLTS OUTPUT DC AMPS OUTPUT RIPPLE (RMS) 7.575 0-7.5 75 30 mV 7.5125 0-7.
Chapter 2 INSTALLATION 2.1 INSPECTION Inspect the shipping carton for possible damage before unpacking the unit. Carefully unpack the equipment. Save all packing materials until inspection is complete. Verify that all items listed on the packing slips have been received. Visually inspect all exterior surfaces for broken knobs, connectors or meters. Inspect for dented or damaged exterior surfaces. External damage may be an indication of internal damage.
Table 2-1 Output Connection Descriptions SUPPLY TYPE CONNECTION DESCRIPTION Output <=60V Bus Bar with hole for 1/4” bolt Output >=80V Terminal Block with 6-32 screws Table 2-2 Input Connection Descriptions SUPPLY TYPE CONNECTION DESCRIPTION 3300, 3300I Terminal Block with 6-32 screws Table 2-3 3300 Series Input/Output Connectors CONNECTOR FUNCTION CONNECTS TO TB2 - AC TB2 - AC CHASSIS - GND Prime Power Input (Std)* Prime Power Input (Std)* 95 to 127 VAC 47 to 63 Hz Power Source Pos.
2.4 WIRE SIZING Care must be taken to properly size all conductors for the input and output of the power supply. Table 2-5 below gives minimum recommended wire size for the input. This table is derived from the National Electrical Code and is for reference only. Local laws and conditions may have different requirements. The table is for copper wire only. Table 2-4 Minimum Wire SizeTable SIZE AWG MCM 14 12 10 8 6 4 3 2 1 0 2.
NEG TB1 POS TB2 16.75 Ø0.25 2 PL 1.00 18.15 0.125 1.75 19.
Chapter 3 OPERATING INSTRUCTIONS 3.1 CONTROLS AND INDICATORS Front panel controls and indicators for the 3300 Series are identified in Figure 3-1 with index numbers keyed to Table 3-1. Table 3-1 provides a description of all operator controls and indicators. 3.1.1 Local Operation Units are shipped from the factory configured for local voltage/current control and local voltage sensing.
Table 3-1 3300 Series Controls and Indicators FIGURE & INDEX NO. CONTROL/INDICATOR FUNCTION 3-1 1 Circuit Breaker Provides fault protection 2 Power Switch Applies AC power to the power supply. 3 VOLTAGE Meter Measures voltage output. 4 Voltage Mode Indicator Indicates the power supply is operating in the voltage mode. 5 Current Mode Indicator Indicates the power supply is operating in the current mode 6 CURRENT Meter Measures current output.
Table 3-2 Barrier Strip (TB1) Designations and Functions TB1 DESIGNATOR SCHEMATIC SYMBOL FUNCTIONAL DESCRIPTION 1 V+ Positive output voltage for local voltage sensing. 2 VS+ Positive voltage sensing terminal.* 3 VPROG 1 milliamp current source for either local or remote voltage programming using resistance. 4 VCONT Voltage control input terminal. 5 VSET 6 VS- Front panel voltage control potentiometers for local control. . Negative voltage sensing terminal.
Table 3-2 Barrier Strip (TB1) Designations and functions - Continued TB1 DESIGNATOR SCHEMATIC SYMBOL FUNCTIONAL DESCRIPTION 15 ON/OFF AC/DC RTN Return for AC/DC voltage source used for remote on/off control. 16 ON/OFF AC/DC Externally supplied AC/DC voltage source for on/off output voltage control. This is a positive (+) terminal for DC voltage. 3.1.
programming, the programming coefficient is 0.1 volt per percent of rated output or 10 volts = 100%. See Figure 3-6 for connection requirements. 3.1.4 Remote Sensing In applications where the load is located some distance from the power supply, or the voltage drop of the power output leads significantly interferes with load regulation, remote voltage sensing may be used. When remote sensing is used, voltage is regulated at the load versus the power supply output terminals.
NOTE The following modes of operation are used for applications requiring more current or voltage than is available from a single power supply. To meet the requirements for greater output voltage or current, two or more supplies may be connected in series or parallel. 3.1.6 Auto-Parallel Operation In the auto-parallel mode of operation, a master/slave configuration is established.
Individual current controls on both master and slave(s) remain active. See Figure 3-12 for connection requirements. 3.1.9 Output overvoltage Protection If the power supply is equipped with an overvoltage crowbar, the front panel will contain overvoltage adjustment. The potentiometer controlling overvoltage may be adjusted through an access hole in the front panel. NOTE All overvoltage circuitry has been properly adjusted to their respective unit before leaving the factory.
Figure 3-2 Normal Connection pattern Figure 3-3 Remote Resistance Programming of Output Current M520086-01 3-11
Figure 3-4 Remote Voltage Programming of Output Current Figure 3-5 Remote Resistance Programming of Output Voltage M520086-01 3-12
Figure 3-6 Remote Voltage Programming of Output Voltage Figure 3-7 Remote Sensing Operation M520086-01 3-13
Figure 3-8 Remote On/Off Control by Contact Closure Figure 3-9 Remote On/Off Operation Using AC/DC Voltage Source M520086-01 3-14
Figure 3-10 Auto-Parallel Operation M520086-01 3-15
Figure 3-11 Auto-Series Operation M520086-01 3-16
Figure 3-12 Auto-Tracking Operation M520086-01 3-17
Chapter 4 MAINTENANCE AND CALIBRATION 4.1 INTRODUCTION This chapter contains preventive maintenance information and calibration procedures for the 3300 Series. WARNING All maintenance that requires removal of the cover of the unit should only be done by properly trained and qualified personnel. Hazardous voltages exist inside the unit. 4.2 PREVENTIVE MAINTENANCE Preventive maintenance for the 3300 Series consists of scheduled inspection and cleaning. a. Schedule.
Table 4-2 Inspection and Corrective Action ITEM External Connector plugs and jacks INSPECT FOR Looseness, bent or corroded contacts, damage or improper seating in mating connector CORRECTIVE ACTION Clean contacts with solvent moistened cloth, soft bristle brush, small vacuum or low compressed air. Replace connectors damaged, deeply corroded, or improperly seated in mating connector. Chassis, blower & extruded heatsinks Dirt and Corrosion Clean with cloth moistened with soapy water.
4.3 CALIBRATION AND ADJUSTMENTS To perform the following calibration and adjustment procedures, the cover must be removed from the power supply. Because removal of the cover allows access to potentially hazardous power voltages (up to 253 VAC or 358 VDC) and because of the importance of accurate readings to performance, only technically trained personnel should perform calibration procedures. WARNING Hazardous voltages (up to 253 VAC or 358 VDC) during equipment operations.
b. Set voltage control potentiometer on front panel fully counterclockwise. c. Connect a precision DMM to TB1-8(+) with reference to TB1-11(-). Set DMM to DC milliamps and 2 milliamp range. d. Apply power to power supply. e. Adjust R71 for 1.000 milliamps on DMM. Current Zero Calibration The voltage control circuit (U8) zero is adjusted by R106. The following sequence is recommended. a. Connect jumper (short circuit) between TB1-4 and TB1-6. b.
e. Adjust R87 until the power supply output voltage starts to increase in normal polarity. Reverse adjustment direction of R87 until output voltage decreases to zero reading on the DMM. Do not continue adjustment when the output reads zero volts. Current Full-Scale Calibration Full-scale current calibration is accomplished by adjusting R88. The following sequence is recommended. a.
Current Monitor/Parallel Tracking Amplifier Full-Scale Calibration The current monitor/parallel tracking amplifier is accomplished by adjusting R77. The following sequence is recommended. a. Connect an external calibrated current shunt between the power supply negative output and a resistive load bank capable of full-rated power. (As an option, the shunt may be connected between the power supply positive and negative output bus bars.) b. Connect a DMM across the current shunt sensing. c.
