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7 Use and Maintenance
7.1 Considerations before installation of the circuit breaker
The appearance of the circuit breaker is in good condition, and no-load
operation works normally.
The insulation resistance between the poles of the circuit breaker and
the incoming and outgoing line terminals of the same pole in the
interrupting state shall
not be less than 1.5 MΩ.
The rated values of the circuit breaker and its accessories shall be
consistent with the working conditions of the installation site.
There shall be no significant impact vibration at the installation, which
meets the normal working conditions.
7.2 The cross-section area of the connecting conductor of the circuit breaker
shall not be less than that specified in Table 8, and the connecting
screws shall be tightened.
Table 8 Cross-section area of the connecting conductor
Rated current In
(A)
10 16
20 32
40
50 63 80 100
125
150
160
175
200
225 250
300
350 400
Cross-section
area of the
conductor
(mm
2
)
1.5 2.5 6
10 16 25 35 50 70 95 120 185 240
Rated current In
(A)
500
630
700, 800
Copper
conduct
or
Pcs
2
2
2
Cross-section
area
(mm
2
)
150
185
240
Copper
busbar
Pcs
2
2
2
Cross-section
area
(mm
2
)
30×5
40×5
50×5
7.3 Various characteristics of the circuit breaker and its accessories are set
by our company according to the order requirements, and cannot be
adjusted freely during use.
7.4 The handle of the circuit breaker can be in three positions: "Closed",
"Open" and "Tripped". When the handle is in the trip position, it shall be
pulled in the "Open" direction to make the circuit breaker trip again, and
then the "Closing" operation can be carried out.
7.5 During the installation of the internal accessories, the circuit breaker
must be tripped and interrupted before installation.
