Huawei TP48200A-D14A1 Telecom Power User Manual page 38

TP48200A-D14A1 Telecom Power
User Manual
DC Contactor
Table 5-3 DC contactor description
Position Type
Load Closed type, (when
Disconnected the contactor without
Branch electricity, the state is
closed)
Battery Fuse or Open type, (when the
battery circuit contactor without
breaker Branch
electricity, the state is
open)
Figure 5-1 DC contactor
Issue 04 (2019-12-20)
Check Method
 When there is no voltage at the control poles of the contactor,
check whether the input and output poles of the contactor are
proper by using the multimeter. For example, the contactor of
the power system is closed type contactor as shown in Figure
5-1. When there is no voltage at control poles 1 and 2 but
measuring shows that the input and output poles 3 and 4 are
disconnected, it indicates that the contactor is faulty.
 When there is voltage at the control poles of the contactor,
check whether the input and output poles of the contactor are
proper by using the multimeter. For example, the contactor of
the power system is a closed type contactor as shown in
Figure 5-1. When there is voltage at control poles 1 and 2 but
measuring shows that the input and output poles 3 and 4 are
connected, it indicates that the contactor is faulty.
 When there is no voltage at the control poles of the contactor,
check whether the input and output poles of the contactor are
proper by using the multimeter. For example, the contactor of
the power system is an open type contactor as shown in
Figure 5-1. When there is no voltage at control poles 1 and 2
but measuring shows that the input and output poles 3 and 4
are connected, it indicates that the contactor is faulty.
 When there is voltage at the control poles of the contactor,
check whether the input and output poles of the contactor are
proper by using the multimeter. For example, the contactor of
the power system is an open type contactor as shown in
Figure 5-1. When there is voltage at control poles 1 and 2 but
measuring shows that the input and output poles 3 and 4 are
disconnected, it indicates that the contactor is faulty.
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5 System Maintenance
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