System Control Instructions; Starting The Ups System In Double Conversion Mode; Starting The Ups System In Bypass Mode - Santak CASTLE Series User Manual

6.3. System Control Instructions

6.3.1.

Starting the UPS System in Double Conversion Mode

The UPS system can consist of a single UPS or several parallel UPSs.
To start the UPS system:
1. Unfasten the front door latch and swing the door open.
2. (If the UPS contains) Verify that rectifier input switch, output switch, bypass switch are
closed the UPS system, and close the front door.
3. Close the UPS input feeder circuit breaker.
4. Close the UPS bypass input feeder circuit breaker.
5. Observe the UPS control panel display becoming active, indicating logic power. Repeat
steps 1-5 for each individual UPS in the system.
6. Press the Controls button in the main menu. The System Controls screen appears.
7. On the System Controls screen, the system status should indicate SHUTDOWN.
8. Press the Go online button on the System Controls screen. If Auto Bypass is enabled,
the critical load is immediately supplied by the bypass source, in Bypass Mode, until the
inverter turns on and the UPS transfers to Double Conversion Mode. The status indicator
on the UPS control panel indicates the UPS is in Bypass Mode. If auto bypass is not
enabled, the UPS output remains off until the UPS system transfers to Double Conversion
Mode.
9. Observe the following messages appear sequentially on the System Controls screen:
The rectifier and inverter turn on. The DC voltage continues to ramp up to full voltage.
Once the DC link reaches full voltage, and the battery breaker is closed, the UPS output
relay K3 closes and the static switch turns off. Power is now supplied to the Critical load
in Double Conversion Mode. It takes approximately 20 seconds for the UPS system to
achieve Double Conversion Mode.
10. The UPS system is now operating in Double Conversion Mode and the NORMAL status
indicator is illuminated in all UPSs in the system.
6.3.2.

Starting the UPS System in Bypass Mode

If the inverter output of the UPS is not available and the critical load needs to be energized,
perform the following procedure:
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3C3 HD 400-600 kVA UPS
Installation and Operation Manual
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