+84-28-3742 1888
+84-28-3742 1888

MSLE-63Residual Current Operated Circuit BreakerwithOver-currentProtection (EarthLeakageCircuit BreakerwithOverCurrentProtection)

  • Our RCBOs have been designed to combine earth leakage and overload protection in one compact unit. All have a sensitivity setting of 30mA, 100mA, 300mA and are availablein various current ratings. These protection devices are suitable for domestic, commercial and industrial applications.

1. Application.

MSLE-63 series leakage breaker is suitable for the leakage protection of the line of AC 50/60Hz, rated voltage single phase 240V, rated current up to 63A. When there is human electricity shock or if the leakage current of the line exceeds the prescribed value, it will automatically cut off the power within 0.1s to protect human safety and prevent the accident due to the current leakage. MSLE-63 series leakage breaker can protect against overload and short-circuit. It can be used to protect the line from being overloaded and short-circuited as well as infrequent changeover of the line in normal situation. It complies with standard of IEC/EN61009-1 and GB16917.1.

msle 63


2. Main Technical Parameter.


Type MSLE-63
Frame 63A
Rated working voltage 240V
Rated frequency 50/60Hz
Rated working current 2,3,6,16,20,25,32,40,50,63A
Rated residual operating current 0.01,0.03,0.1,0.3A
Rated residual un-operating current 0.005,0.015,0.05,0.15A
Sensibility A & ACType
Maximum operating time I△n t≤0.1s , 5I△n t≤0.04
Rated making and breaking capacity In≤50A 500A,In=63A 630A,In=63A 1500A
Instant release type B & C Type
Limiting value of un-operating current 6In
Rated Tripping Current 30mA,100mA,300mA
Rated limiting short-circuit current 4500, 6000, 10000A
Pole number 1P+N; 3P+1N
Mechanical life 4000
Electric life 20000
Termianl Capacity: cable up to 25mm2



3. Principle Operation.


msle 63 principle operation
msle 63 principle operation


4. Dimension.


msle 63 dimension
msle 63 dimension


5. The over-current tripping unit protection feature.


Sequence NO. Release Test current I/In Start state Tripping time Expected restlt
1 C 1.13In Cold state t≤1h Not tripping
2 C 1.45In

Start right after the

serial NO.1 test

t<1h tripping
3 C 2.55In Cold state 1s<t<60s tripping
4 C 5In Cold state t≤0.1s Not tripping
5 C 10In Cold state t<0.1s tripping


We are also one of the leading manufacturers and exporters of a wide range of SMC Pole Mounted Junction Boxes (Street Light Boxes). These are manufactured using high grade material and are provided with a protection cover to avoid shocks. These boxes are highly durable and are offered in standard specifications to our clients.

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We apply a policy of continuous development of its products and reserves the right to make changes in the specifications and technical characteristics without notice, For further information please contact Morstar.

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