APC Symmetra MW Installation Guide download pdf (Page 30)

Electrical Installation: Relay Board (Optional)

24 Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B

Relay Board functions

The Relay Board informs the user of the operation mode, status, and alarm conditionsand has 8 ports

on the input side and 16 output terminals.

Note

Use Normally Closed (NC) contacts for Fail safe Mode and Normally Open (NO) for

Active on.

Relay

Name Events that will trigger the alarm Mode Comment

K1 Common Alarm • Any of the functions below, except relays

K8, K9, K10, K11;

• Inverter section fault;

• Main PSU fault;

• System locked in operation mode;

• Internal memory fault;

• Internal communication fault.

Fail safe Warning

K2 Battery voltage out of

tolerance

• DC voltage is too high (shut down);

• DC voltage is under warning level;

• DC voltage is low (shut down).

Fail safe Warning

K3 Mains out of tolerance • Mains voltage RMS value is out of

tolerance;

• Mains waveform not accepted (fast

detector);

• Mains frequency is out of tolerance.

Fail safe Warning

K4 Bypass out of tolerance • Bypass voltage RMS value is out of

tolerance;

• Bypass waveform not accepted (fast

detector);

• Bypass frequency is out of tolerance.

Fail safe Warning

K5 Battery condition fault • Battery monitor has detected a weak

battery;

• Battery monitor has detected a defective

battery.

Fail safe Fault

K6 Battery disconnected • Battery breaker tripped/open. Fail safe Fault

K7 System overload • Output load exceeded 100%;

• Delta Inverter current limiter is active;

• Main Inverter current limiter is active.

Fail safe Fault

K8 Output out of tolerance • Output voltage RMS value is out of

tolerance;

• Output waveform not accepted (fast

detector);

• Output frequency is out of tolerance.

Fail safe Fault

K9 Normal operation • UPS is running in normal operation. Active on Opr. mode

K10 Battery operation • UPS is running in battery operation. Active on Opr. mode

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APC Symmetra MW Installation Guide Page 30

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