nvent 910 Series Installation, Operating And Maintenance Instructions page 38

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Alarm Mask: ENABLE or DISABLE
Range: 0.3 to 100.0 Amps
Procedure: Adjust the HIGH CURRENT ALARM level to the desired value. Note that the HIGH
CURRENT ALARM must be enabled in order to adjust the HIGH CURRENT ALARM level.
IMPORTANT: As the HTC automatically protects itself from overload, it would not normally
be necessary to enable this alarm. This automatic protection can be used effectively to
guard against accidental paralleling of heating circuits. In-rush, or cold start currents typically
associated with self-regulating cables, may cause nuisance HIGH CURRENT ALARMS. If this is
undesirable this alarm should be disabled.
5.5.4 HIGH LOAD CURRENT ALARM FILTER TIME SETTING
Purpose: The HIGH CURRENT ALARM FILTER will prevent HIGH LOAD CURRENT ALARMS
from being indicated until a high current condition has existed for the duration of the HIGH
CURRENT ALARM FILTER time.
Range: 0 to 12 seconds
Procedure: Adjust the HIGH CURRENT ALARM FILTER time to the desired value. Note that the HIGH
CURRENT ALARM must be enabled in order to adjust the HIGH CURRENT ALARM FILTER time.
IMPORTANT:
• If an alarm condition appears and then disappears before the alarm filter time has expired,
the filter timer is reset and the alarm condition must exist again for the entire alarm filter
time before the corresponding alarm will be indicated.
• If the user resets an alarm while the alarm condition is still exists, then the alarm will not be
indicated again until the entire alarm filter time has expired.
5.5.5 HIGH GROUND FAULT CURRENT ALARM
Purpose: Alarms ground fault current levels which are higher than a preset limit for the
application.
Alarm Mask: ENABLE or DISABLE
Range: 20 to 250 mAmps
Procedure: Adjust the HIGH GFI ALARM level to the desired value. Note that the HIGH GFI
ALARM must be enabled in order to adjust the HIGH GFI level.
5.5.6 HIGH GROUND FAULT CURRENT ALARM FILTER TIME SETTING
Purpose: The HIGH GFI ALARM FILTER will prevent HIGH GFI ALARMS from being indicated
until a high GFI condition has existed for the duration of the HIGH GFI ALARM FILTER time.
Range: 0 to 12 seconds
Procedure: Adjust the HIGH GFI ALARM FILTER time to the desired value. Note that the
HIGH GFI ALARM must be enabled in order to adjust the HIGH GFI ALARM FILTER time.
IMPORTANT:
• If an alarm condition appears and then disappears before the alarm filter time has expired,
the filter timer is reset and the alarm condition must exist again for the entire alarm filter
time before the corresponding alarm will be indicated.
• If the user resets an alarm while the alarm condition is still exists, then the alarm will not be
indicated again until the entire alarm filter time has expired.
5.5.7 GROUND FAULT TRIP ALARM
Purpose: This value sets the upper limit of allowable ground fault leakage current. Exceeding
this limit will result in the output switch being latched off and the GFI TRIP ALARM activated to
indicate a ground fault condition.
Alarm Mask: ENABLE or DISABLE
Range: 20 to 250 mAmps
Procedure: If ground fault tripping is desired, enable the GFI TRIP ALARM and adjust the G.F.
TRIP CURRENT to the desired value. To disable ground fault tripping, disable the alarm.
Note that the