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Possible Causes

• •Current exceeds instantaneous trip level calculated based on current transformer ratio and application power rating
• •Current exceeds thermal damage curve limit
• •Output voltage on any phase exceeds pre-set values
• •Voltage on any phase has dropped below a pre-set value
• •Thermal damage curve exceeded
• •Instantaneous trip level exceeded based on current transformer ratio and application power rating
• •Utility failure
• •Output voltage on any phase exceeds pre-set values (adjustable from 105-130% of nominal voltage)
• •Voltage on any phase drops below pre-set value (adjustable over a range of 50-95% of reference voltage)
• •Current exceeds thermal damage curve or instantaneous trip level
• •Loss of utility power source
• •Voltage on any phase has dropped below a pre-set value (adjustable over a range of 50-95% of reference voltage)
• •Current exceeds thermal damage curve
• •Current level exceeds the instantaneous trip level calculated based on the thermal damage curve, current transformer ratio, and application power rating
• •Thermal damage curve limit exceeded
• •Output voltage on any phase exceeds pre-set values (105-130% of nominal voltage)
• •Voltage on any phase drops below pre-set value (50-95% of reference voltage)
• •Thermal damage curve limit or instantaneous trip level exceeded based on current transformer ratio and application power rating
• •Utility power outage or failure
• •Current exceeds thermal damage curve or instantaneous trip level calculated based on current transformer ratio and application power rating

Suggested Actions

1. 1Automatic transfer and re-transfer of the load from utility to generator set and vice-versa
2. 2Automatically start and stop the generator set
3. 3AMF feature provides automatic transfer of the load from utility to generator set
4. 4AMF feature automatically starts the generator set
5. 5Automatic transfer and re-transfer of the load from utility to generator set via built-in AMF feature
6. 6Automatic start and stop of the generator set
7. 7High AC voltage shutdown (with adjustable time delay from 0.1 - 10 seconds)
8. 8Low AC voltage shutdown (with adjustable time delay from 2-20 seconds)
9. 9Overcurrent warning
10. 10Overcurrent shutdown
11. 11Automatic transfer and re-transfer of the load from utility to generator set via the built-in AMF feature
12. 12Automatic start-stop of the generator set
13. 13Automatically starts-stops the generator set
14. 14Adjust voltage threshold settings within 105-130% of nominal voltage
15. 15Adjust time delay within 0.1-10 seconds
16. 16Adjust voltage threshold settings within 50-95% of reference voltage
17. 17Adjust time delay within 2-20 seconds
18. 18High AC voltage shutdown (trips after delay of 0.1 - 10 seconds; default 110% for 10 seconds)
19. 19Low AC voltage shutdown (trips after delay of 2-20 seconds; default 85% for 10 seconds)
20. 20Connect a utility voltage monitoring sensor to the 1302 control

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