how to read circuit breaker markings and symbols low...

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ON Trip (Mid position) OFF Current Rating 60A - 60 ampere MCB Symbol (isolation capable) Curve C3 - Curve 3 Rated Voltage 240V - 240 volt Frequency 50Hz - 50 hertz Interrupting Capacity 3 kA - 3 kiloampere Model Code - QA Pole type - 1 / single Width - 13 mm Energy Efﬁciency (QA only) low voltage How to read Circuit Breaker Markings and Symbols x 2N N 1 24 3 1 x x 1 N 2 N x N 2 1 N 24 3 1 Plus: Positive Polarity Minus: Negative Polarity DC Direct Current AC Alternating Current Circuit Breaker Disconnector / Isolator Double Pole Circuit Breaker 1 Pole + Neutral Circuit Breaker Double Pole Switch Disconnector Earth Leakage Type A with Overload Earth Leakage Type C without Overload For further information contact CBI-electric: low voltage: Tel: +27 11 928 2000 - Email: [email protected] - Website: www.cbi-lowvoltage.com

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Page 1: How to read Circuit Breaker Markings and Symbols low …cbi-lowvoltage.co.za/sites/default/files/downloads/... · Circuit Breaker 1 Pole + Neutral Circuit Breaker Double Pole Switch

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: [email protected] - Website: www.cbi-lowvoltage.com

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