KXB2-63 high breaking capacity miniature circuit breaker
Application:
KXB2-63 high breaking miniature circuit breaker have advanced structure, reliable performance, high breaking capacity, compact and elegant exterior etc features. Apply to the place with circuit of AC 50Hz or 60Hz, rated working voltage 400V or lower that it, rated current from 3A to 63A.Widely used in office building, residential for lighting, distribution system for overload, short circuit protection, also can be used for circuit infrequence converting in normal condition.
Model No. and meaning:
Technical parameter:
Rated current(A) | Pole | Voltage(V) | Breaking Capacity(A) | Mechanical life() | Electric life |
3-40 | 1P,2P | 230 | 4000 | 20000 | 8000 |
2P,3P,4P | 400 | 4000 | 20000 | ||
50-63 | 1P,2P | 230 | 4000 | 20000 | |
2P,3P,4P | 400 | 4000 | 20000 |
Function:
1. Short circuit protection, overload protection, control, isolation
2. Limiting degree:3
3. Close rapidly: Ensure reliable working in impacted load, extend circuit breaker electric life
4. Wire connect terminal area: lower than 25A can connect several 16mm2 flexible wire, or single 25mm2 hard wire, 32A-63A can connect several 25mm2 flexible wire, or single 35mm2 hard wire
Over current tripping characteristic diagram:
Testing current(A) | Rated current(In) | Schedule time | Expect result | Initial status | Remark |
1.13In | Any | T≥1h | Non trip | cold | Current rise to setting parameter in 5s |
1.45In | Any | T﹤1h | Trip | cold | |
2.55In | In3≤2A | 1s ﹤t﹤60s | Trip | cold | |
2.55In | In＞32A | 1s ﹤t﹤120s | Trip | cold | |
5In(C type) | Any | T≥0.1s | Non trip | cold | Close auxiliary switch connect power supply |
10In(C type) | Any | T﹤0.1s | Trip | cold | Close auxiliary switch connect power supply |
10In(D type) | Any | T≥0.1s | Non trip | cold | Close auxiliary switch connect power supply |
14In(D type) | Any | T﹤0.1s | Trip | cold | Close auxiliary switch connect power supply |
Action characteristic curve:
Overall and installation size:
Note: Installation rail adopt JB6525
Bimetal: Actually, it contains three metals iron, copper, cadmium, galvanized. Three metals with different coefficients of thermal expansion, bending cause thermal Pick reflect and making the breaker disconnect. This is the most import parts of the circuit breaker. The Bimetal is the use of different materials under different breaker amperage.
Coil: It's the important parts for the reaction of the Magnetic Trip. It's always 9 ring. As a matter of fact, the number of Coil with Different Amperage.For example, 1A reaches over 100 ring, and 63A is used to 56 ring. The Diameter Thickness is also different for Amperage.
Action Contactor(Sliver Point): It's the main point for the Reaction of Trip. Under normal conditions, keeping closed. When overload and short circuit, It will be breaking.
Arc Chute: Playing a role in destroying the arc. Generally tend to produce a large number of Moving and Static Contactor from the contactor, arc, even emerge spark.
