APC MW II External Bypass Static Switch Wiring

Symmetra MW II 1200 kW 3 x 400/230 V Installation - 990-1979E-00110

External Bypass Static Switch Wiring

Warning: Before you start the installation, verify that all AC and DC power source

breakers are in the open position.

Warning: Use only manual reset protection as input over-current protection.

Warning: Over-current protection required by national wiring rules.

Warning: The UPS has no built-in disconnect devices to switch off external AC (Q1 and

Q5) and DC (Q7 and Q8) input power. Ensure that the disconnect devices are available

as separate components for this installation.

Caution: The External Bypass Static is not provided with built-in backfeed protection. Use

suitable breakers with a minimum of 0.8 in/20 mm air gap and trip function. The breaker is

controlled from the External Bypass SSW and will be tripped in case of backfeed.

Note: The installer must provide each external disconnect device for this UPS system with

labels displaying the following text: “Isola te the Uninterruptible Power Supply (UPS) as

instructed in the User Guide before working on the circuit.”

Note: The installation of the External Bypass Static S witch must comply with local and

national regulations.

Note: Run matched set of phase cables in the same cable run(s). Do not separate phases into

different cable runs.

Note: Use only copper conductors.

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