Voltage Operated Earth Leakage Circuit Breaker , Outdoor Circuit
Breaker
GENERAL
STC series adjustable residual current circuit breaker is suitable
for AC 50/60Hz,230/400V circuit,prevents from
overloading,short-circuit etc.On the occasion of shock hazard or
earth leakage,it will trip immediately.At the same time,the rated
current of overload protection can be adjustable.
The mccb can be sorted to C type (basic),L type (standard),M type
(high breaking), H type(higher breaking) according to its rated
limit short circuit breaking capacity.
The mccb has the features small volume, breaking capacity high,
electric arcing short ,anti-vibration. It is the ideal product for
application in land and ship.
SPECIFICATION
| Type | STC230 | STC420 |
| Rated Current(A) | 10A,15A,20A,25A,32A,40A,50A,60A | 10A,15A,20A,25A,32A,40A,50A,60A |
| Pole Number | 2Pole | 4Pole |
| Leakage acting current(mA) | 300mA,500mA | 300mA ,500mA |
| Range of break-off | 0.5~1.0X IΔn | 0.5~1.0X IΔn |
| Rated Voltage(V) | 220V-250VAC | 240V/415VAC |
| Tripping time | 100ms | 100mS |
| Life | 100000 times | 100000 times |
| Ambient Temperature | -5°C ~ +55 °C | -5°C ~ +55 °C |
An Earth-leakage circuit breaker (ELCB) is a safety device used in
electrical installations with high Earth impedance to prevent
shock. It detects small stray voltages on the metal enclosures of
electrical equipment, and interrupts the circuit if a dangerous
voltage is detected. Once widely used, more recent installations
instead use Residual Current Circuit Breakers which instead detect
leakage current directly.
The main purpose of Earth leakage protectors is to prevent injury
to humans and animals due to electric shock.
There are two types of Earth-leakage circuit breaker:
· voltage operated (referred as ELCB in this article) and,
· current operated (referred to as RCCB in this article).
