Scope of application

3TB1 series miniature circuit breaker, with advanced structure, reliable performance, high breaking capacity, beautiful appearance, small, etc. Suitable for ac 50 hz or 60 hz, rated voltage up to 400 v, rated current is 63 a and below. Mainly used in office buildings, residential buildings and similar lighting, power distribution lines and equipment overload, short circuit protection, can also be used in normal circumstances, for the use of lines do not frequent conversion. The product meets the requirement of IEC60898, GB10963 standards.

Normal working conditions

• Upper limit of ambient air temperature is not more than + 40 ˚ C, the lower limit is generally not more than 5 ˚ C. Above + 40 ˚ C or below - 5 ˚ C under the conditions of use should be negotiated with factory.

• Install location is generally not more than 2000 m above sea level.

• The air is clean, and in the highest temperature + 40 ˚ C, air relative humidity but more than 50%.

• At lower temperatures allow larger relative humidity, such as + 20 ˚ C, relative humidity of 90%.

• It should be noted that due to temperature changes, may occasionally have a moderate amount of condensation, at this time should be take appropriate push (such as drain).

• Circuit breaker installed vertically, and the inclination of the vertical plane was less than 5 & deg; .

• No significant shaking shock and vibration.

• If installed in a closed enclosure, and more close when installation should be use, optional capacity coefficient 0.7 ~ 0.8, protective shell can be used for metal high value, on all plastic enclosure, can adopt low.

Structural features

• All components within the circuit breaker by plastic shell. The outer flame retardant arc resistance of high strength plastic, new so good resistance to impact strength and flame retardant properties. Contact system USES electric repulsion mechanism, current limiting effect is remarkable, greatly improving the breaking capacity of circuit breaker. Tripping device adopts solenoid electromagnetic tripping, accurate and stable setting current. Multipolar composed of unipolar assembled products.

• Circuit breaker designed to apply to not professionally trained personnel to use, the need for maintenance. Overcurrent trip protection characteristics by the factory setting, users cannot adjust, lest affect performance.

• Design the circuit breaker in side assemble all kinds of accessories, such as leakage trip, shunt tripping device, auxiliary contacts, alarm contacts the first attachment.

• The wire connection mode, maximum 25 m ㎡ round copper wire. Installation guide for TH35-7.5 standard steel rail.