Pentair 920 Series Installation, Operating And Maintenance Instructions page 34

INDUSTRIAL HEAT TRACING SOLUTIONS
• If the user resets an alarm while the alarm condition is still exists, the alarm will not be
indicated again until the entire alarm filter time has expired.
3.8.3 hIGh Load Current aLarm
purpose: Alarms current levels that are higher than a preset limit for the application.
alarm mask: ENABLE or DISABLE
range: 0.3 to 100.0 amps
(CURRENT TURNS RATIO = 1.00)
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. Also note
that the HIGH CURRENT ALARM level is affected by the CURRENT TURNS RATIO setting. The
absolute maximum adjusted HIGH CURRENT ALARM level is 300.0 amps. The absolute minimum
adjusted HIGH CURRENT ALARM level is 0.1 amps. See section 3.5.22 on page 26 for more
information regarding the CURRENT TURNS RATIO function.
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 the
alarm should be disabled.
3.8.4 hIGh Load Current aLarm fILter tIme settInG (v3.11 and up)
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, the alarm will not be
indicated again until the entire alarm filter time has expired.
3.8.5 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.
3.8.6 hIGh Ground-fauLt Current aLarm fILter tIme settInG (v3.11 and up)
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.
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