Ceiec Electric Technology
35
holding down the <System>
button for 3 seconds or via
communications.
Table 4-4 Digital Input Setpoint Details
4.3.3 I residual Setpoints
The I residual Setpoints can be used to monitor residual current and provide alarming and control
capability if the residual current exceeds a pre-determined level. The PMC-53 provides two types of I
residual Setpoints: ALARM and TRIP. The programming of the I residual Setpoints is supported
through front panel operation and via communications. These two setpoints can be individually
enabled, and their programming and operational details are illustrated in the following table.
1) I residual >= 0.9 × ALARM
Setpoint Limit
2) The ALARM Setpoint becomes
active when I residual has
exceeded 0.9 x ALARM Setpoint
Limit for a duration longer than
the Action Delay time.
3) When ALARM is active, an SOE
event would be generated, the
front panel Alarm LED would be
lit and the Alarm buzzer would
sound.
4) If Setpoint Trigger is enabled,
DO1 would close.
5) While ALARM is active, the
Alarm buzzer can be muted by
holding down the <Phase>
button for 3 seconds.
1) I residual >= I residual TRIP
Setpoint Limit
2) The TRIP Setpoint becomes
active when I residual has
exceeded the TRIP Setpoint
Limit for a duration longer
than the Action Delay time.
3) When TRIP is active, an SOE
event would be generated
and DO2 would close.
1) I residual < 0.8 × ALARM
Setpoint Limit
2) The ALARM Setpoint becomes
inactive when I residual is less
than 0.8 x ALARM Setpoint Limit
for a duration longer than the
Release Delay time.
3) The front panel Alarm LED, the
Alarm buzzer, and DO1 (if
1) I residual < 0.8 × TRIP
Setpoint Limit
2) The TRIP Setpoint becomes
inactive when I residual is less
than 0.8 x TRIP Setpoint Limit
for a duration longer than the
Release Delay time.
3) DO2 would open
automatically.
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