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Table 2 Internal accessory code
Imm
(A)
I
II
III
Notes
Code
Description
Code
Description
Code
Description
63
100
250
0
N/A
0-2
Number of
auxiliary
contacts
0–2
Number of
alarm
contacts
1
Shunt trip
0–1
0–1
2
Undervoltage
release
0–1
0–1
400
0
N/A
0–5
0—2
II+
III≤
7
1
Shunt trip
0-3
0–2
II+
III≤
5
2
Undervoltage
release
0-3
0–2
II+
III≤
5
3
Shunt/Undervolta
ge release
0–1
0–1
II+
III≤
2
630
800
0
N/A
0–8
0–3
II+
III≤
11
1
Shunt trip
0-6
0–3
II+
III≤
8
2
Undervoltage
release
0–6
0-3
II+
III≤
8
3
Shunt/Undervolta
ge release
0–3
0–2
II+
III≤
5
4 Normal Working Conditions
The circuit breaker is suitable for the following working conditions:
4.1 The ambient air temperature shall not be higher than +40°C or lower than -5°C.
4.2
Altitude ≤ 2,000 m.
4.3 The relative air humidity shall not exceed 50% at the maximum temperature of
+40°C. A higher relative humidity is allowed at a lower temperature. The average
minimum temperature of the wettest month shall not 25°C, and the
average maximum relative humidity of that month shall not exceed 90%.
4.4 Contamination grade: Grade 3. There is no explosion danger and no gas or
conductive dust that corrodes metals or damages insulation in the surrounding
air.
4.5 The installation category is Grade III.
4.6 The "1, 3, 5 and N1" terminals of the circuit breaker are connected to the power
supply, and the "2, 4, 6 and N2" terminals are connected to the load, which
cannot be reversed.
4.7 The installation surface of the circuit breaker shall be vertical to the horizontal
plane. The circuit breaker is basically installed vertically, with the power supply
terminal at the top and the load terminal at the bottom, and can also be installed
horizontally.
