APC MW II Relay Boards

13Symmetra MW II 1200 kW 3 x 400/230 V Installation - 990-1979E-001

Relay Boards

Location of relay boards

Communication cables with optional Relay Board

UPS Summary

Normal

Relay boards

Fan C

N X008

Backplane X008

Contents

Main Installation Symmetra MW II Normal UPS Summary 1200 kW 400 V Page Contents Safety ............................................... .......................1 System Overview............................ ..........................3 UPS Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 External Bypass Static Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Specifications ........................................................ 17 Required Breaker Settings (400 V Systems) . . . . . . . . . . . . . . . 20 Appendix ...................................................... ........ 23 TT Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 IT Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Safety IMPORTANT SAFETY INSTRUCTIONS - SAVE THESE INSTRUCTIONS EPO Symbols used in this guide Installation safety Page System Overview UPS Sections Serial number Inverter Section Control/Input/Output Section External Bypass Static Switch Serial number 5Symmetra MW II 1200 kW 3 x 400/230 V Installation - 990-1979E-001 Electrical Installation Typical UPS Wiring Principle Power wiring overview See separate guide on parallel operation for wiring overview in parallel systems. External disconnection switches Input/Output wiring precautions Page Battery cables connection 9Symmetra MW II 1200 kW 3 x 400/230 V Installation - 990-1979E-001 X405 UPS Summary ~~ External Bypass Static Switch Wiring 11Symmetra MW II 1200 kW 3 x 400/230 V Installation - 990-1979E-001 Top cable entry L3 OUT L2 OUT Communication cable overview X184 UVR 31 X181 Relay Boards Relay board 1 connections Relay board 2 connections Page Specifications Low-Impedance/High-Impedance Earthing Electrical Specifications AC Input DC Input AC Output AC Input External Bypass SSW Heat dissipation Notes Torque specifications Required Breaker Settings (400 V Systems) Input and upstream breakers Output and downstream breakers Page Appendix System and Protective Earthing TN Systems Reference to IEC 60364-4-41 413.1.3 Reference to IEC 60364-5-54 546.2.3 Additional requirements for generating sets (IEC 60364-5-55 551.4.2) Protective devices in TN systems TT Systems Reference to IEC 60364-4-41 413.1.4 Protective devices in TT systems IT Systems Reference to IEC 60364-4-41 413.1.5 Protective devices in IT systems Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-00128 Symmetra MW See: IEC 60364-4-41 413.1.3 Switchgear box 29Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-001 Symmetra MW See: IEC 60364-4-41 413.1.4 and "Strkstrmsbekendtgrelsen" 551.6.3, Note ( 551.6.3 is missing in IEC 60364-5-55 ) Strkstrmsbekendtgrelsen 551.6.3 Note Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-00130 Symmetra MW See: IEC 60364-4-41 413.1.3 box breaker 31Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-001 Symmetra MW See: IEC 60364-4-41 413.1.3 This system configuration is not recommended Switchgear Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-00132 Symmetra MW Owing to parallel return path for the fault current used at this point. Residual current protective device can not be 33Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-001 Symmetra MW impedance Grounding Z Page Page 4/2009990-1979E-001 *990-1979E-001* APC Worldwide Customer Support