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