POWER PROTECTION Static Transfer Switch 100 to 1200 Amps Installation & Operation Manual
TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 Unpacking and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1.1 1.1.2 1.1.3 1.1.4 1.1.5 1.1.6 1.1.7 1.2 Unpacking and Preliminary Inspection . . . . . . . . . . .
FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Typical Static Switch Cabinet Data, Ratings Up to 250 Amps . . . . . . . . . . . . . . . . . . . . . . . . . 3 Typical Static Switch Cabinet Data, 400 and 600 Amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS Save these instructions This manual contains important instructions that should be followed during the installation and maintenance of the Static Transfer Switch. ! WARNING THE UNIT IS SUPPLIED BY MORE THAN ONE POWER SOURCE. UNIT CONTAINS HAZARDOUS VOLTAGES IF ANY OF THE INPUT SOURCES IS ON, EVEN WHEN THE UNIT IS IN BYPASS. TO ISOLATE THE UNIT, TURN OFF AND LOCK OUT ALL INPUT POWER SOURCES.
1.0 INSTALLATION 1.1 Unpacking and Installation NOTE Read the entire manual before installing and operating the system. Upon receipt of the Precision Power Center Static Switch, the installer should perform the following steps to assure a high-quality installation. 1.1.1 Unpacking and Preliminary Inspection A high-quality installation begins on the receiving dock. 1. Upon receipt and before unpacking, inspect the shipping crate for damage or mishandling. Check the Shock-Watch™ indicator.
Figure 1 Typical Static Switch Cabinet Data, Ratings Up to 250 Amps Installation 3
Figure 2 4 Typical Static Switch Cabinet Data, 400 and 600 Amps Installation
Figure 3 Typical Static Switch Cabinet Data, 800 and 1200 Amps Installation 5
1.1.3 Unit Preparation To remove unit from the shipping pallet, set the pallet in a level area where there is enough room to maneuver and remove the unit. Remove the rear and side panels (if furnished) to provide access to the unit frame and to prevent damage to the exterior panels during handling. Be sure to carefully disconnect the panel ground wires by pulling the quick-disconnect terminals at the unit frame before lifting off the panels.
Figure 4 Recommended Derating for High Altitude Operation 100 Rating (%) 98 96 94 92 90 88 10000 9500 9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 0 86 Altitude (Feet Above Sea Level) Maximum Ambient Temperature for Full Load Operation at Higher Altitudes 10000 9500 9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 40 39 38 37 36 35 34 33 32 31 30 0 Max.
1.1.5 Floor Pedestal Installation Floor pedestals are optional equipment intended to provide bottom cable clearance without relying on a raised floor to support the unit. The pedestals are adjustable over a limited range (approximately 3 1/2 in. [89 mm]) to allow leveling of the unit and minor adjustments of the installed height. If floor pedestals are used for the Precision Power Center, additional floor pedestals are required for the Static Switch.
1.1.6 Attachment of the Static Switch to the Precision Power Center The Static Switch can be bolted to either the left or right side of a Precision Power Center having the same height and depth. For Static Switches applied on the input to the Precision Power Center (see Figure 7), left side mounting is preferred. For Static Switches applied on the output of the transformer (see Figure 8), the Static Switch is recommended to be located in between the two Precision Power Centers.
Figure 7 Typical Static Switch One-Line Diagram SOURCE 1 SOURCE 2 STS1 CB1 STS2 CB2 K2 K1 K2 K3 CB4 CB3 K1 K3 CB5 OUTPUT Figure 8 Typical One-Line Diagram for Static Switch on the Output of the Precision Power Center Transformers SOURCE 1 SOURCE 2 MICB1 MICB2 ISOLATION TRANSFORMER CB1 STS1 ISOLATION TRANSFORMER STS2 K2 K1 K2 K3 225A 1.
1.2.1 Input And Output Power Connections If the unit is furnished with input junction boxes, the input power connections are made to the input power terminals located in the junction boxes. Input power cables, furnished with the input junction boxes, are shipped unattached to the unit for connection between the junction boxes and the lugs provided inside the unit. If junction boxes are not furnished, the input power connections are made to the lugs provided inside the unit.
1.2.2 Input Junction Box Installation (If Used) The input junction box option is available to simplify input connections to the Static Switch. Two input junction boxes and the associated flexible 10 foot long (3 meters) input cables are provided. (This option is available only with bottom cable entrance, typically when the unit is located on a raised floor.) The junction boxes, if used, can be shipped with the unit or advanced shipped for installation during the rough-in stage of construction.
For alarm annunciation with Precision Power Centers, it is recommended that the N.O. summary alarm contact and N.C. auto transfer enable contact be connected to two of the Precision Power Center PMP N.O.
2.0 OPERATING INSTRUCTIONS NOTE Before unit is placed into service for the first time, after equipment relocation, or after the equipment has been de-energized for an extended period of time, a thorough equipment inspection and supervised start-up by qualified personnel are strongly recommended. Contact your local Liebert representative or Liebert Global Services at 1-800-543-2378 to arrange for equipment inspection and start-up.
Figure 10 Typical Operator Control Panel (Showing the Monitor/Mimic Display Screen) CB4 CB1 STS 1 A-B B-C C-A 480V 480V 480V 150A 150A 150A 60.0 Hz Preferred CB2 STS 2 A-B B-C C-A 480V 480V 480V 0A 0A 0A 60.0 Hz Alternate UP 2.2 DOWN SELECT Auto Retransfer Disabled History Stored OUTPUT KVA KW 125 101 Transfers CB3 Load 10 Transfer Inhibit Peak-I1 OVLD CB5 ALARM RESET ALARM SILENCE Operator Controls The operator control panel is furnished with five push-button switches.
2.4 Menu Screens Figure 11 shows the menu tree for the screens available to the operator on the LCD. The Master Menu, shown in Figure 12, contains the primary menu selections for monitoring and controlling the operation of the static switch. From any of the primary screens (accessed directly from the Master Menu), pushing the Select switch once will return to the Master Menu. From any of the secondary screens, pushing the Select switch twice will return to the Master Menu.
Monitor/Mimic Display The Monitor/Mimic screen is the primary display screen for the static switch. This screen mimics the power flow through the static switch and indicates source status, breaker status, switch status, source voltage and current readings, output power measurements, and active alarm messages. Pressing the Select switch will return the display to the Master Menu. Figure 13 Monitor/Mimic Display Screen CB4 CB1 STS 1 A-B B-C C-A 480V 480V 480V 150A 150A 150A 60.
Present Status The Present Status screen displays the present (real-time) conditions of the static switch, which is updated every second while the screen is displayed. It includes active alarms, source voltages, source currents, frequency, and the output kVA and kW.
frame when the fault occurred, and the next 23 frames. The 64 frames of History Status can be a very useful diagnostic tool. As such, it is recommended that the History Status buffer not be reset until the designated fault condition that caused the buffer to be latched is viewed and investigated by a qualified service technician. After the alarm condition has been corrected, the History Status buffer can be reset (unfrozen) by pressing and holding the Alarm Reset switch for at least 5 seconds.
System Configuration The System Configuration screen displays the Static Switch and site “personality” information. Some of this information, including the system parameters, model number, and order number, is set at the factory and should be changed only by qualified service personnel. The time, date, and auto dial parameters may be changed by qualified user personnel. The Language Selection allows the displays to be changed to English, French, German, Italian, or Spanish.
Auto Dial Setting The Auto Dial Setting screen (which is accessed from the System Configuration screen) controls the settings of the optional, internal modem. To change any of the auto dial settings, use the Up or Down push-button switches to move the cursor to the setting to be changed and push the Select switch. Use the Up or Down push-button switches to toggle the selected values to the desired setting, then press the Select push-button switch to select the desired value.
Setpoints The Setpoints screen is used to adjust the user-accessible switch settings. To limit access to the settings to qualified personnel, Security Access is required to make changes to the settings. The retranslate delay settings are the time delays in auto retranslates back to the preferred source after the preferred source is restored. The phase difference setting is the allowable phase difference between the input sources before disabling manual or auto retranslates.
Start-Up Procedures The Start-Up Procedures screens display the typical switch turn-on procedures after the initial switch start-up has been completed. These guidelines should be reviewed for any special equipment modifications, load equipment considerations, special site conditions, or company policies that may require changes to the standard equipment start-up procedures.
Bypass Procedures The Bypass Procedures screens display the typical switch bypassing procedures. Screen 1 displays instructions to bypass the switch to the current input source. Screen 2 displays instructions to return from bypass to normal operation. Figure 26 Bypass Procedures Screen 1 DOWN : NEXT PAGE SELECT : MASTER MENU BYPASS PROCEDURES (to SOURCE 1) 1.
Figure 28 Meter Calibration Screen SECURITY ACCESS UP : CURSOR UP DOWN : CURSOR DOWN SELECT : CHOOSE METER CALIBRATION EXIT SOURCE 1 VOLTS PHASE A-B SOURCE 1 VOLTS PHASE B-C SOURCE 1 VOLTS PHASE C-A SOURCE 1 AMPS PHASE A SOURCE 1 AMPS PHASE B SOURCE 1 AMPS PHASE C SOURCE 2 VOLTS PHASE A-B SOURCE 2 VOLTS PHASE B-C SOURCE 2 VOLTS PHASE C-A SOURCE 2 AMPS PHASE A SOURCE 2 AMPS PHASE B SOURCE 2 AMPS PHASE C Customer Alarm Interface/Remote Source Select The Customer Alarm Interface Definitions Screen is used
2.5 Operating Guidelines After the initial equipment start-up, the following operating guidelines can be used for standard equipment operation. These guidelines should be reviewed for any special equipment modifications, special site conditions, or company policies that may require changes to the standard equipment operation. 2.5.
2.5.3 Maintenance Bypass The static switch is equipped with bypass breakers CB4 and CB5 to allow manual bypass of the switch electronics to either input source in case of switch failure or for maintenance of the switch. Through proper operation, the static switch can be bypassed without de-energizing the load using a make-before-break switching sequence.
2.6 Alarm Messages The static switch monitoring system detects and annunciates a comprehensive set of alarm conditions. Alarm messages are displayed on the Monitor/Mimic screen below the Output box. Alarm messages remain active until the alarm condition has been corrected and the Alarm Reset switch has been pushed. All active alarms are displayed on the Present Status screen. A record of the last 128 alarms is stored in nonvolatile memory and can be viewed from the Event History screens.
. Table 1 Alarm Messages Alarm Message Source1 Fail Description/Cause Action Input Source 1 voltages are above or below acceptable thresholds. F, L, D, A Source2 Fail Input Source 2 voltages are above or below acceptable thresholds. F, L, D, A OF/UF Source frequencies are above or below user-adjustable thresholds. A Shorted SCR1 One or more of the SCRs in STS1 have failed shorted. F, L, D, A Shorted SCR2 One or more of the SCRs in STS2 have failed shorted.
2.7 Communication Interfaces The static switch monitoring system includes two RS-232 communication ports, an optional modem, an optional RS422 SiteScan Communications Port, and switch status contacts for remote monitoring of the static switch. One of the RS-232 ports is intended for the connection to a local terminal. The other RS-232 port is for connection to the optional modem.
3.0 MAINTENANCE ! WARNING ONLY QUALIFIED SERVICE PERSONNEL SHOULD PERFORM MAINTENANCE ON THE STATIC SWITCH. LETHAL VOLTAGES EXIST INSIDE THE UNIT DURING NORMAL OPERATION. THE UNIT IS SUPPLIED BY MULTIPLE AC POWER SOURCES. DISCONNECT AND LOCK-OUT ALL POWER SOURCES BEFORE WORKING INSIDE UNIT. Minimal periodic maintenance of the Static Switch is required.
32 Maintenance
Static Transfer Switch 100 - 1200 amps Technical Support U.S.A. Outside the U.S.A. 1-800-LIEBERT +614-841-6755 or 1-800-222-5877 U.K. +44 (0) 1628 403200 France +33 (0) 1 43 60 01 77 Germany Italy Netherlands E-mail Web site Worldwide FAX tech support +49 89 99 19 220 +39 2 98250 1 +31 (0) 475 503333 upstech@liebert.com http://www.liebert.
