Electrical Installation: Relay Board (Optional)
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.
Use Normally Closed (NC) contacts for Fail safe Mode and Normally Open (NO) for Active on.
Note
Relay | Name | Events that will trigger the alarm | Mode | Comment | |
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K1 | Common Alarm | • Any of the functions below, except relays | Fail safe | Warning | |
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| K8, K9, K10, K11; |
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| • Inverter section fault; |
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| • Main PSU fault; |
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| • System locked in operation mode; |
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| • Internal memory fault; |
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| • Internal communication fault. |
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K2 | Battery voltage out of | • DC voltage is too high (shut down); | Fail safe | Warning | |
| tolerance | • DC voltage is under warning level; |
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| • DC voltage is low (shut down). |
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K3 | Mains out of tolerance | • Mains voltage RMS value is out of | Fail safe | Warning | |
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| tolerance; |
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| • Mains waveform not accepted (fast |
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| detector); |
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| • Mains frequency is out of tolerance. |
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K4 | Bypass out of tolerance | • Bypass voltage RMS value is out of | Fail safe | Warning | |
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| tolerance; |
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| • Bypass waveform not accepted (fast |
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| detector); |
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| • Bypass frequency is out of tolerance. |
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K5 | Battery condition fault | • Battery monitor has detected a weak | Fail safe | Fault | |
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| battery; |
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| • Battery monitor has detected a defective |
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| battery. |
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K6 | Battery disconnected | • Battery breaker tripped/open. | Fail safe | Fault | |
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K7 | System overload | • Output load exceeded 100%; | Fail safe | Fault | |
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| • Delta Inverter current limiter is active; |
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| • Main Inverter current limiter is active. |
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K8 | Output out of tolerance | • Output voltage RMS value is out of | Fail safe | Fault | |
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| tolerance; |
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| • Output waveform not accepted (fast |
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| detector); |
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| • Output frequency is out of tolerance. |
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K9 | Normal operation | • UPS is running in normal operation. | Active on | Opr. mode | |
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K10 | Battery operation | • UPS is running in battery operation. | Active on | Opr. mode | |
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24 | Symmetra MW 1000 kW 480 V Installation - |