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: “Isolate the Uninterruptible Power Supply (UPS) as instructed in the User Guide before working on the circuit.”

Note: The installation of the External Bypass Static Switch 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.

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