AC Power For Business-Critical Continuity™ Liebert® GXT2-PP20KRT208™ User Manual–Parallel POD for Liebert GXT2-10000RT208
TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.6 Remove a Single UPS from the Paralleling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.7 Replacing a Faulty Power Module or UPS Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . 24 8.8 Overload Condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8.9 Battery Low Voltage—Battery Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 9.
IMPORTANT SAFETY INSTRUCTIONS ! WARNING Risk of electric shock. Can cause equipment damage, injury or death. Extreme caution is required when performing maintenance. Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations and manufacturers’ specifications. Be constantly aware that the UPS system contains high DC voltages as well as high AC voltages.
GLOSSARY OF SYMBOLS Risk of electrical shock ! Indicates caution followed by important instructions AC input AC output i - Suggests the user consult the manual + Indicates the presence of a valve-regulated lead acid battery PbH2SO4 R Recycle DC voltage Equipment grounding conductor Bonded to ground AC voltage WEEE logo 2
Introduction 1.0 INTRODUCTION Congratulations on your choice of the Liebert GXT2-PP20KRT208 parallel POD. It allows parallel connection of input and output up to three Liebert GXT2-10000RT208 UPSs. The Liebert GXT2-PP20KRT208 parallel POD features an N+1 redundancy. While one Liebert GXT2-10000RT208 UPS is available at 10kVA nominal power rating, connecting three UPSs in parallel provides 20kVA of output power, plus redundancy of one 10kVA UPS. The Liebert GXT2-PP20KRT208 is a compact, parallel POD.
System Description 2.0 SYSTEM DESCRIPTION 2.1 Compatibility The Liebert GXT2-PP20KRT208 parallel POD is compatible only with the Liebert GXT2-10000RT208 UPS. No more than three Liebert GXT2-10000RT208 UPSs can be connected to the parallel POD. 2.2 Redundancy Design During normal operation with parallel connection of three Liebert GXT2-10000RT208 UPSs, the parallel POD supplies 20kVA of output power plus redundancy of one 10kVA UPS.
System Description 2.4 Liebert MultiLink™ Shutdown The parallel POD supports the orderly shutdown of computer operating system through its compatibility with Liebert MultiLink 1.5 software. When properly configured to operate with Liebert MultiLink 1.5, the parallel POD will operate as a complete system; On Battery and Low Battery events will not be sent from the UPS when it is operating in redundant mode and the remaining UPS is able to support the total load.
System Description Figure 3 Configure Liebert MultiLink 1.5 for shutdown to work with a parallel system Select this option either while installing the software or later through the connection options Enable shutdown ... ...
Major Components 3.0 MAJOR COMPONENTS The Liebert GXT2-PP20KRT208 has five main components (see Figure 4): • • • • • Figure 4 UPS input / output circuit breakers Main input / output terminal blocks Parallel communication ports Maintenance bypass breaker Input and output slots for each UPS Liebert GXT2-PP20KRT208 components Main Input / Output Terminal Blocks Parallel Communication Ports UPS Input / Output Circuit Breakers Maintenance Bypass Breaker Input and Output Slots for UPS 3.
Major Components 3.5 Parallel Communication Port The Liebert GXT2-PP20KRT208 parallel POD has three 15-pin parallel communication ports on the upper right of the parallel POD. Several signals are provided on this port to communicate with each UPS. Use the parallel communication cables for the connection between the parallel POD and each UPS. When the UPS is powered on, it enters parallel mode automatically. Refer to 5.
What’s Included 4.
What’s Included 4.1 What You Need You will need the following tools for assembly of the parallel system connections.
Installation 5.0 INSTALLATION This section includes instructions on how to set up the connections between the parallel POD and the UPS, connect wiring to the terminal block, install the Liebert GXT2-PP20KRT208 parallel POD in a rack or on a wall and add an optional distribution POD. Do NOT attempt to start the UPS, turn on any circuit breaker or energize the input power until instructed to do so in 6.0 - Initial Startup and Electrical Checks.
Installation 5.1.2 Mount the Liebert GXT2-PP20KRT208 on a Wall Mounting the parallel POD on a wall requires eight field-supplied wall inserts and eight field-supplied screws. The minimum size for the wall insert is 5x30 and for the screw, M5x30. 1. Secure the four fixed brackets to the rearmost screw holes on either side of the Liebert GXT2-PP20KRT208 (see Figure 10). 2. Use the electric drill to drill the holes with suitable depth (could be the length of the wall inserts) in the wall. 3.
Installation 5.2 Paralleling System Connections The Liebert GXT2-PP20KRT208 is shipped with the input and output slots for UPS and the optional output power distribution section covered. Installation of the paralleling system requires: parallel power cables, fixed plates and cable clamps. These are included in Liebert GXT2-20KPC-6 kit (see Figure 7). Follow the procedure below to start the installation. ! WARNING Risk of electric shock. May cause property damage, personal injury or death.
Installation 10. 11. 12. 13. 14. 10 If the Liebert GXT2-10000RT-208 UPS was a stand-alone unit but now will be part of a parallel system, remove the input and output cables from the rear terminal block and cover the terminal block with the original conduit box. Secure the cables to the housing with two cable clamps, 10mm hex driver required. Put the cover plate on the housing and secure it with two screws. Repeat Steps 2 through 11 to connect the other parallel power cables to the other UPSs.
Installation 5.3 Main Input and Output Terminal Block Connections Conduit entry holes are provided on the front top of the removable cover plate for the parallel POD. Input and output wiring should be run in separate conduit. See the following requirements and label to connect the wires.
Installation 5.4 Add an Output Power Distribution Module—Optional ! WARNING Risk of electric shock. Can cause equipment damage, injury or death. Lethal voltages may exist within the UPS and parallel POD as long as the UPS is connected. Before beginning to install the optional output distribution module, make sure the paralleling system and all connected UPSs are completely powered off. To add an optional output distribution module to the Liebert GXT2-PP20KRT208: 1.
Installation 5.5 Parallel POD Main Electrical Connection—Must Be Installed Electrical connections are made through a removable conduit box that attaches to the top of the parallel POD. A branch breaker is required for short circuit or overcurrent protection. The installer must provide a 120A (@ 208V to 240V) branch circuit breaker.
Initial Startup and Electrical Checks 6.0 INITIAL STARTUP AND ELECTRICAL CHECKS This section includes the procedures on how to install the paralleling system for the first time and how to perform initial system checks of each UPS individually before connecting them in parallel. NOTICE Miswiring power to the input terminal block (L1-L2-N-G) may damage the UPS. For the initial installation, perform the following: 1. Verify that the input and output circuit breakers on UPS are Off (open).
Configuration 7.0 CONFIGURATION The Liebert GXT2-PP20KRT208 parallel POD allows connecting a maximum of three UPSs in parallel. See the following table for the maximum output power. Table 2 Maximum output power from paralleled UPSs Method 7.1 Number of UPSs Maximum Output Power Redundancy Paralleling for Capacity 2 20kVA — Paralleling for Capacity and Redundancy 3 20kVA 10kVA Paralleling for Capacity When two UPSs are connected to the paralleling system, the maximum output power is 20kVA.
Operation 8.0 OPERATION 8.1 Operating Modes 8.1.1 Online Mode NOTICE Verify the operation of each UPS as detailed in 6.0 - Initial Startup and Electrical Checks before powering On the parallel system as detailed below. To power On the paralleling system: 1. Connect all parallel power cables and parallel communication cables between the UPSs and parallel POD. 2. Switch all output circuit breakers on the parallel POD to the On (closed) position. 3.
Operation 8.1.2 Bypass Mode ! WARNING Risk of electric shock. Can cause equipment damage, injury or death. Lethal voltages may exist within the UPS and parallel POD as long as the UPS is connected. Do not open the maintenance bypass breaker cover unless the operating procedure instructs you to do so or conditions require it. If the mains fails, the connected load will lose input power. NOTICE Risk of loss of power. May cause equipment damage.
Operation 8.1.3 Output Off Mode To transfer the paralleling system to Output Off Mode: 1. Make sure that each UPS is in Bypass Mode. If a UPS is not in Bypass Mode, press the UPS’ Off button once (see 8.1.2 - Bypass Mode). 2. Press the Off button on the first UPS twice within four seconds. 3. Perform Step 2 on each UPS in the paralleling system within one minute, otherwise the paralleling system cannot enter Output Off Mode. 4. Each UPS will transfer to Output Off Mode synchronously.
Operation 8.5 Add a Single UPS to the Online Paralleling System 1. Make sure that breakers on the UPS to be added and the corresponding breakers on the parallel POD are in the Off position. 2. Connect the parallel power cables between the UPS and the parallel POD. 3. Turn On the corresponding input breaker (do NOT turn On the corresponding output breaker) on the parallel POD and make sure the input phase of the UPS is correct. 4. Turn On the input and output breakers on the UPS. 5.
Operation 8.7 Replacing a Faulty Power Module or UPS Internal Battery 1. Press the UPS’ Off button twice within four seconds to turn off the UPS. The UPS will transfer to Output Off Mode. 2. Turn Off the input and output breakers on the UPS and the corresponding input and output breakers on the parallel POD. 3. Make sure that the single UPS has shut down. 4. Disconnect the parallel communication cable between the UPS and parallel POD. 5.
Operation 8.9 Battery Low Voltage—Battery Mode See the following conditions when the battery low voltage is detected in the paralleling system. • If one UPS battery is running low, it will transfer to Output Off Mode. The other UPSs continue to supply power to the load. • If all UPS batteries are running low, the devices will transfer to Output Off Mode and shut down simultaneously. When utility power returns, the paralleling system will restart automatically.
Communication 9.0 COMMUNICATION 9.1 Communication Interface The Liebert GXT2-PP20KRT208 parallel POD has three communication connectors for communication between the UPSs. These connectors must not be used for any other monitoring applications. Each connected Liebert GXT2-10000RT208 UPS can be monitored as described in 2.4 - Liebert MultiLink™ Shutdown. The recommended monitoring configuration is with the Liebert IntelliSlot SNMP card option.
Communication Figure 15 Calculating total load per UPS 2 UPSes Connected to a Parallel Pod 3 UPSes Connected to a Parallel Pod L1 N L2 G L1 N L2 G L1 N L2 G L1 N L2 G L1 N L2 G UPS1 UPS2 UPS1 UPS2 UPS3 I/P O/P I/P O/P Optional Output Distribution Module I/P O/P L1 N L2 G I/P O/P Input I/P O/P Optional Output Distribution Module I/P O/P L1 N L2 G Input Maintenance Breaker Maintenance Breaker Output Table 3 Output L1 N Load L2 G L1 N Load L2 G Calculating total load, 20kVA examp
Communication 9.3 UPS Configuration Settings Refer to the Liebert GXT2-10000RT208 user manual, SL-23444, for additional information on using the UPS Configuration Program. When the configuration program is used with any of the connected Liebert GXT2-10000RT208 UPSs, options selected are changed in all operational UPSs connected to the parallel POD with the parallel communication cable.
Specifications 10.0 SPECIFICATIONS Table 5 Parallel POD specifications Model Number Liebert GXT2-PP20KRT208 Model Rating 20,000VA / 16,000W at 120/208 or 120/240 VAC Dimensions, in (mm) Unit, W x D x H in. (mm) 16.94 x 9.85 x 16.61 (430 x 250 x 422) Shipping, W x D x H in. (mm) 23.05 x 16.74 x 19.38 (585 x 425 x 492) Weight, lb (kg) Unit 41.89 (19) Shipping 48.94 (22.
Specifications Table 7 Optional output distribution specifications—PD-201 Model Number PD-201 Dimensions, in (mm) Shipping W x D x H in. (mm) 10.44 x 8.87 x 7.88 (265 x 225 x 200) Weight, lb (kg) Unit 5.29 (2.4) Shipping 6.39 (2.
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