Omron K2CU Manual page 8

K2CU
In a Three-phase, Delta Network
Set the operating current to be 0.6 times the heater current.
Close the contactor with switches SW
that the alarm indicator remains off.
Turn off SW and confirm that the alarm indicator comes on, and that
2
the output relay operates.
Turn on SW set the operating current to be 0.9 times the heater cur-
1
rent, and confirm that the alarm indicator goes off and the output
relay releases.
Turn off SW and confirm that the alarm indicator comes on, and that
1
the output relay operates.
S1
S2
K2CU-F
In a Three-phase, Star Network
Set the operating current to be 0.9 times the heater current.
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.
S1
S2
SW
1
8
and SW turned on. Confirm
1 2
Contactor
SW
1
SW
2
Heater
turned on. Confirm that the
1
Contactor
K2CU-F
Heater
In a Three-phase, V Network 1
Set the operating current to be 0.3 to 0.35 times the heater current.
Close the contactor with switch SW
alarm indicator remains off.
Turn off SW1 and confirm that the alarm indicator comes on, and
that the output relay operates.
S1
S2
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 contactor with switch SW
alarm indicator remains off.
Turn off SW1 and confirm that the alarm indicator comes on, and
that the output relay operates.
K2CU-P
Contactor
SW
1
Heater
K2CU
turned on. Confirm that the
1
Contactor
K2CU-F
SW
1
Heater
turned on. Confirm that the
1
1
2
K2CU-P