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4.17
Data is subject to errors and technical modifications.
Residential
Distribution
Miniature Circuit Breakers
Torque Settings, Electrical Characteristics
Torque Settings
Pz No.
(mm)
Cables >1.5mm
2
Tightening torque (N.m)
Cables ≤1.5mm
2
Tightening torque (N.m)
Cable Stripping (mm)
Single Cable Multi Cables Single Cable Multi Cable
Consumer unit terminals
Earth and neutral terminal bars
2
6.5
2
2
1.5
1.5
10
Isolation
SB switch disconnectors
2
6.5
3.6
3.6
3.6
3.6
15
Circuit protection
MTN MCB
2
6.5
2.8
2.8
2.8
2.8
13
NBN/NCN/NDN MCB
2
6.5
2.8
2.8
2.8
2.8
13
RCBO
2
5.5
2.1
2.1
2.1
2.1
13
RCCB
2
5.5
2.8
2.8
2.8
2.8
13
Power Loss
The power loss of MCB’s is closely controlled by the standards and is calculated on the basis of the voltage drop across the main
terminals measured at rated current. The power loss of hager circuit breakers is very much lower than that required by the British Standard, so in consequences
run cooler and are less affected when mounted together.
The table below gives the watts loss per pole at rated current.
MTN Electrical Characteristics.
MCB Rated current (A)
0.5 1 2 3 4 6 10 13 16 20 25 32 40 50 63
Watts loss per pole
1.2 1.3 1.5 2.0 1.8 1.4 1.9 2.1 2.5 2.8 3.2 3.8 4.0 4.5 5.1
Poles
Rated
Operational
Voltage U e (V)
Nominal
Current
Breaking
Capacity (I cn
)
to BS EN 60898
Breaking
Capacity (I cs
)
to BS EN 60898
Rated
Insulation
Voltage
Ul (V)
Rated Impulse
Voltage
Uimp (kV)
Electrical
Endurace
Connection of
Auxiliaries
Single Pole 230
6 - 63A
6kA
6kA
500V
4kV
10,000
cycles
No