Omron K2CU Manual page 7

K2CU
In a Three-phase, V Network 1
Set the operating current to be 0.3 to 0.35 times the heater current.
Close the SW with switch SW
2
indicator remains off.
Turn off SW1 and confirm that the alarm indicator comes on, and
that the output relay operates.
SSR
G+
G–
S1
S2
SW
1
Heater
K2CU-F, K2CU-P
The operation of the heater burnout detector can be easily checked
as follows:
In a Single-phase Circuit
Set the operating current to be 0.55 to 0.6 times the heater current.
S1
S2
turned on. Confirm that the alarm
1
SW
2
K2CU-F
Contactor
K2CU-F
SW
1
Heater
In a Three-phase, V Network 2
Set the operating current to be 0.6 times the heater current (of the
phase connected between terminals 1 and 2, or the one passed
through the window of the window-type Current Transformer of the
heater burnout detector).
Close the SW with switch SW
2
indicator remains off.
Turn off SW1 and confirm that the alarm indicator comes on, and
that the output relay operates.
SSR
SW
1
Heater
Close the contactor with switch SW
alarm indicator remains off.
Turn off SW and confirm that the alarm indicator comes on, and that
1
the output relay operates.
Contactor
1
2
SW
1
Heater
K2CU
turned on. Confirm that the alarm
1
SW
2
G+
G–
S1
S2
K2CU-F
turned on. Confirm that the
1
K2CU-P
7