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POWER DISTRIBUTION
STS2/PDU
INSTALLATION, OPERATION & MAINTENANCE MANUAL
250A - 800A
Three Phase
60 Hz
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CONTACTING LIEBERT FOR SUPPORT To contact Liebert Global Services for information or repair service in the United States, call 1-800-LIEBERT (1-800-543-2378). Liebert Global Services offers a complete range of start-up services, repair services, preventive maintenance plans and service contracts. For repair or maintenance service outside the 48 contiguous United States, contact Liebert Global Services, if available in your area. For areas not covered by Liebert Global Services, the authorize
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TABLE OF CONTENTS CONTACTING LIEBERT FOR SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.0 UNPACKING AND INSPECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.1 External Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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8.0 INTRODUCTION TO STS2/PDU OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69 8.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 8.1.1 Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 8.1.2 Reliability and Agency Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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12.0 COMMUNICATION INTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87 12.1 Using the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 12.1.1 Connecting and Using a Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 12.1.2 Configuring the STS2/PDU via the Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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15.0 EVENT MESSAGE HELP TEXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121 16.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144 16.1 Proper Tightening of Nuts and Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 16.2 Testing the STS2/PDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Figure 36 Electrical field connections, 8600A STS2/PDU with left side output breaker. . . . . . . . . . . . . . . . 46 Figure 37 Electrical field connections, 800A STS2/PDU interconnect wiring . . . . . . . . . . . . . . . . . . . . . . . . 47 Figure 38 Electrical field connections, 800A STS2/PDU interconnect wiring, breaker section . . . . . . . . . . 48 Figure 39 Electrical field connections, 800A STS2/PDU interconnect wiring, STS section . . . . . . . . . . . . . 49 Figure 40 Electrical field
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TABLES Table 1 Shipping weights (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 2 Heat output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 3 Altitude conversionfeet to meters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4 Input/output conduit plate spe
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during the installation and maintenance of the Liebert Static Transfer Switch 2 Power Distribution Unit (STS2/PDU). Read this manual thoroughly, paying special attention to the sections that apply to your installation, before working with the Static Transfer Switch 2 Power Distribution Unit. Retain this manual for use by installing personnel. Refer to 1.2.1 - Handling Cons
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A thorough equipment inspection and supervised start-up by qualified service personnel are strongly recommended at these times: 1. Before unit is placed into service for the first time 2. After equipment relocation, and 3. After the unit has been de-energized for an extended period of time CAUTION ! This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J of the FCC rules and EN550022. These limits provide reasonable protection against harmful interferen
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Unpacking and Inspections 1.0 UNPACKING AND INSPECTIONS NOTE Read the entire manual before beginning to install the STS2/PDU. Upon delivery of the STS2/PDU, the installer should perform the following steps to ensure a high-quality installation. A high-quality installation begins on the receiving dock. The STS2/PDU and its packaging should be inspected when the unit is delivered. If the packaging is not damaged, unpack the unit and conduct- ing internal inspection before beginning the installa
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Unpacking and Inspections 1.2.1 Handling Considerations The STS2/PDU is bolted to a wood shipping pallet to allow handling by forklift equipment or a pallet jack. WARNING ! Exercise extreme care when handling STS2/PDU cabinets to avoid equipment damage or injury to personnel. The cabinet can be safely tilted 15 degrees in any direction by forklift. If moving the unit up a ramp on its casters (if the unit is so equipped) or a pallet jack, ensure that the incline does not exceed 15 degrees. Loc
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Location Considerations 2.0 LOCATION CONSIDERATIONS The STS2/PDU should be placed in a clean, cool and dry location. The 250A unit without an output cabinet requires only front access for installation and maintenance. Both front and side access are required for installation and maintenance of 400-800A units and 250A units with output cabinet. The output cabinet comes factory installed or either the right or left side depending on how it was ordered. It cannot be moved from one side to the ot
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Location Considerations 2.4 Altitude The standard units are designed for full load operation up to 4000 feet (1200m) above sea level. See Figure 1 for recommended deratings for altitudes greater than 4000 feet (1200m). Figure 1 Recommended derating for high altitude operation 100 98 96 94 92 90 88 86 Operation at full load at a higher altitude can be accommodated in ambient temperatures less than 104°F (40°C) ambient. Figure 2 shows the maximum allowable ambient temperature for full load oper
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Locating The STS2/PDU 3.0 LOCATING THE STS2/PDU This section provides instructions for leveling the STS2/PDU and anchoring the unit to the floor, should that be required. 3.1 Anchoring the Unit to the Floor The STS2/PDU can be anchored to the concrete floor to ensure stability for the unit in the event of seismic activity. 3.2 Leveling of the 250A Only STS2/PDU Without Anchoring The 250A Static Transfer Switch 2 Power Distribution Unit is furnished with casters and leveling feet. After final
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Power and Control Wiring 4.0 POWER AND CONTROL WIRING All power and control wiring must be installed by a licensed, qualified electrician. All power and con- trol wiring must comply with the National Electrical Code and all applicable local codes. Unless oth- erwise labeled, use the recommended tightening torque shown in Table 29. The input power busbars are accessible through the front of the unit. Lieberts 250A units have PEM nut inserts designed to allow one-handed tightening. Busbars in th
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Power and Control Wiring Figure 3 Typical STS2/PDU, one-line diagram Figure 4 Typical STS2/PDU, one-line diagram, with dual static switch output circuit breakers (not available on 250A units) 9
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Power and Control Wiring Figure 5 Typical STS2/PDU, one-line diagram, with inline distribution, dual static switch output circuit breakers Figure 6 Typical STS2/PDU, one-line diagram, with I-Line distribution, dual static switch output circuit breakers The input and output power wire size should be based on the overcurrent protection device, observing the NEC and local codes. The STS2/PDU output power, ground and neutral busbars accommodate a wide range of wire sizes. The STS2/PDU busbars ac
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Power and Control Wiring 4.2 System Grounding Equipment groundingGrounding is primarily for equipment and personnel safety, although proper grounding also enhances equipment performance. All input and output power feeds must include an equipment grounding means as required by the NEC and local codes. An insulated equipment ground conductor is recommended to run with each input and output power feed. The equipment ground conductors should be at least the minimum size conductor per the NEC ba
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Power and Control Wiring 4.5 Power Supply The STS2/PDU is supplied with redundant power supplies that are designed to operate from a voltage range of 200V to 600V. The unit is set at the factory to match the nameplate voltage. Field adjust- ments are not necessary. If the unit needs to operate at a voltage other than what is listed on the nameplate, contact Liebert Global Services or your local Liebert representative. Table 6 provides transformer tap information. Table 6 Terminal block 1 and
