LiuGong CLG835H, Руководство по обслуживанию

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8-24
Structure Function Principle
January 24, 2017
Starting module CLG835H
Start Contactor
A contactor of 100A is equipped in the machine
to control the start. The rated load current of the
contactor contact circuit is 100A, only a group of
operating contacts are provided as normally
open contacts. Apply +24V voltage to the contac-
tor coil, and the generated electromagnetic force
drives the internal armature to switch on the
operating contact-normally open contact against
the spring force. Whereby, the external circuit, of
which the rated load current is 100A, is con-
nected. Disc24V applied voltage to the
contactor coil, the contactor recovers to reset
condition.
Precautions
A1+ indicates the current input direction, and A2-
shows the current output direction. In the case of
connection error, the inoperative magnetic blow-
out function of contactor will shorten its service
life.
Troubleshooting procedures of contactor
1. Turn the digital multimeter to 200 Ω of Ω posi-
tion.
2. Connect both probes of DMM to the connec-
tor terminals of the contactor respectively, the
value displayed on DMM shall be around
"96
Ω " thereby.
3. Connect both probes of DMM to the bolts
(the operating contact terminals) of the con-
tactor respectively, the value displayed on
DMM shall be around "1" thereby.
4. Apply +24 V power to the connector (coil ter-
minal) of contactor, while connect both
probes of DMM to the bolts of contactor
respectively, the value displayed on DMM
shall be around "0" thereby.
After completing the above steps, if the values
displayed on DMM conform to that described in
the steps, the contactor is in good service condi-
tion. The above steps are inapplicable to the
operating contacts (normally open) where the
abrasion is very severe.
Relay
The rated load current of MINI relay is 10A/20A
with two groups of operating contacts equipped,
therein, the load current of normally open contact
is 20A, while that of normally closed contact is
10A. Apply +24V voltage to the relay coil, and
the generated electromagnetic force switches on
the operating contact-normally open contact.
Whereby, the external circuit, of which the rated
load current is 20A, is connected. Disconnect
+24V voltage to the relay coil, the relay recovers
to reset condition.
P18E00019
P18E00020