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 of
f.
Turn
of
f 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
of
f 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 of
f.
Turn
of
f 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 of
f.
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 T
ransformer of the
heater
burnout detector).
Close the contactor with switch SW
1
turned on. Confirm that the
alarm
indicator remains of
f.
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
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