TCM FB30-8 - CM Contactor

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2. ELECTRICAL PARTS AND PROCEDURES FOR CHECKING
2.2.13 CM CONTACTOR
The CM contactor is used for the on-board battery charger. During charging, 3-phase AC is owing
through the contactor to open the contact B, thus shutting off the control circuit power supply for the
controllers and other devices. Under normal conditions, it opens the 3-phase contacts to prevent the
charge current from owing.
Applicable truck
model
CM contactor
Thermal relay
setting
Input voltage
Thermal relay
setting range
FB10-8
FB15-8
FB18-8
281E2-62661 13A
3 ø 50/60Hz 380/390 V
430/440 V
9 to 13 A
FB20-8
FB25-8
281E2-62651 18A 12 to 18 A
FB25-8LB
FB25-8V
FB30-8
FB30-8V
FB35-8S
281U2-62661 26A 18 to 26 A
Checking procedure
(1) Checking coil resistance
Measure the resistance between points “a” and “b”.
The resistance should be 0.1 to 0.3 kΩ.
(2) Checking for continuity of contact B
Measure the resistance between points “c” and “d”.
There should be no continuity while the button “e” at the center
is being pressed.
Coil
3-phase AC
Contact B