how to read circuit breaker markings and symbols low voltage · mcb symbol (isolation capable)...
Post on 30-May-2020
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ON
Trip (Mid position)
OFF
Current Rating60A - 60 ampere
MCB Symbol(isolation capable)
CurveC3 - Curve 3
Rated Voltage240V - 240 voltFrequency50Hz - 50 hertz
Interrupting Capacity3 kA - 3 kiloampere
Model Code - QAPole type - 1 / singleWidth - 13 mm
Energy Efficiency(QA only)
low voltageHow to read Circuit Breaker
Markings and Symbols
x
2 N
N1
2 4
31x x
1
N2
Nx
N2
1 N
2 4
31
Plus: Positive Polarity
Minus: Negative Polarity
DCDirect Current
ACAlternating Current
CircuitBreaker
Disconnector /Isolator
Double PoleCircuit Breaker
1 Pole + NeutralCircuit Breaker
Double Pole Switch Disconnector
Earth Leakage Type Awith Overload
Earth Leakage Type C without Overload
For further information contact CBI-electric: low voltage:
Tel: +27 11 928 2000 - Email: cbi@cbi-electric.com - Website: www.cbi-lowvoltage.com
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