Leakage Detection Function; Detection Function; Available Ct; Notes - Omron KE1 User Manual

Functions

3.4 Leakage detection function

This function allows detecting electric leakage arising from insulation deterioration of electrical
machinery and apparatus in a low voltage circuit.
PGR1C PVS1C
(Electric power (Electric power
/leakage) /voltage sag)
○
O: With function X: Without function
• PGR1C (power/leakage) is capable of monitoring one circuit and ZCT8E (ZCT extension)
eight circuits.
• The logging function allows storing max. and min. values. (PGR1C (power/leakage) only)
[Measurement range] 30 to 1000 mA (Minimum unit of 1 mA)
* As ZCT8E (ZCT extension) is not provided with the capability of the logging function,
storing measured values is unavailable with the unit.
 Detection function
If measurement continues to provide a value within a range specified as leakage comparison value
for the duration longer than the leakage operating time, issuing an alarm is determined.
[Setting range]
Leakage comparison value: 30 to 1000 mA (Default: 30 mA)
Leakage operating time:
• Leakage monitoring is available in single-phase 2-wire, single-phase 3-wire, 3-phase
3-wire, and 3-phase 4-wire systems.
• To allow signal output at the time of detecting a leakage, assign the function to an output
terminal. For information on the output terminal function setting, refer to page 3-18.
• ZCT input allows Io of current to be measured.
 Logging of measured value
• The logging function allows storing max. and min. values. It also allows storing an alarm
history separately.
PGR1C (Electric power/leakage)
ZCT8E (ZCT extension)
 Available CT
CT for earth wire only:
Split core type ZCT:
Through type ZCT:
* Connect to the ZCT terminal of each unit.
 Notes
• Do not use on the inverter secondary side.
3-14
VSU1B
(Voltage sag) (Voltage/current)
× ×
0.1 to 20.0 s (Default: 0.5 s)
Max. value
○
×
Model K6ER-CN22 (With cable)
Model OTG-CN52 Model OTG-CN77
Model OTG-CN36W
Model OTG-L21 Model OTG-L30
Model OTG-L68 Model OTG-L82
Model OTG-LA30W
VAU1B CTD8E
(CT extension) (ZCT extension)
× ×
Min. value Alarm history
○ ○
× ○
Model OTG-CN112
Model OTG-L42
Model OTG-L156
ZCT8E
○