KJ-63 miniature circuit breaker
one. Use
DZ47-63(C45-63)miniature circuit breaker(hereinafter referred tocircuit breaker) is mainly used for communication50Hz/60Hz,rated voltage400V, current63Aelectrical circuits and equipment can also be used for infrequent switching of circuits.
At present, the maximum current of small circuit breakers produced by our company can reach125A,63Aof the current arrangements are80A,100A,125A.
miniature circuit breakers are dividedCandDtype, general household useCtype circuit breaker, selected in the power system.Dtype circuit breaker.
2.Product Model and Meaning
3.product classification
are classified according to the number of poles:
Unipolar (1P)circuit breaker
bipolar (2P)circuit breaker
Level 3 (3P)circuit breaker
quadrupole (4P)circuit breaker
are divided according to rated current:
6A,10A,16A,20A,25A,32A,40A,50A,63A,80A,100A,125A.
rated operating voltage single pole230V/400V,Two poles, three levels, and four levels are400V.
are divided according to instantaneous trip currentCandD.
4.
ambient air temperature is not lower-5.+40. The daily average is not more+35degrees.
The altitude of the installation site shall not exceed2000meters.
atmospheric relative humidity, at the highest temperature+4050%, there can be higher humidity at lower temperatures, such as the wettest monthly average temperature does not exceed+25degrees, the monthly average relative temperature does not exceed90%, and allows condensation on the surface of the product due to temperature changes.
circuit breakerThe pollution level of the place of use is2.
circuit breaker adoptsTH35-7.5section steel mounting guide rail installation.
circuit breakeris usuallyII,III.
circuit breaker shall be installed according to the normal working position, and the slope between the installation surface and the vertical surface shall not be greater than positive or negative.5degrees.
circuit breaker wiring method, press the wiring with screws.
circuit breaker has an isolation function.
5.technical data
overcurrent trip characteristics
circuit breaker at reference ambient temperature30 to 35degree shall conform to the table.1regulations.
This product meets the standardGB14048.2/GB10963.1.
rated short-circuit on-off capacity:Ics=Icn=4500A (is greater than or equal40A)/3000A(less than or equal50A).
remaining short-circuit connection and disconnection capacity:Im=2000A
Table 1 Overcurrent Tripping Characteristics
rated currentIn(A) | Start status | inspection currentA | specified timet | expected results | check ambient temperature |
≤63A | cold state | 1.13In | t≥1h | does not release | 30℃to 35℃ |
≤63A | cold state | 1.45In | t≥1h | release | 30℃to 35℃ |
≤32A | cold state | 2.55In | t≥1h | release | 30℃to 35℃ |
> 〉32 | cold state | 2.55In | 1s〈t〈120s | release | 30℃to 35℃ |
≤63A | cold state | 5In | t≥0.1s | does not release | 30℃to 35℃ |
≤63A | cold state | 10In | t≥0.1s | release | 30℃to 35℃ |
6. Structural Characteristics and Working Principle
The circuit breaker is composed of contacts, arc extinguishing system, electromagnetic system, trip mechanism and operating mechanism. The electromagnetic system adopts precision and resistance bimetallic materials. The contacts are silver cadmium oxide contacts. In addition, new materials such as enhanced arc-resistant plastics are selected to ensure product performance.
circuit breaker:
, under the normal working condition of the circuit breaker, press the operating mechanism to turn on the power supply. At this time, the trip mechanism is locked and the contact does not move. When the current is too large, the bimetallic sheet of the electromagnetic system is deformed and the lock is pushed to make the iron The core is attracted, and the contact is disconnected under the action of the release spring to complete the breaking protection of the circuit breaker.
vii. Outline and installation dimensions
circuit breakers2and figure3
Dimensions (Table2)
technology/symbol | A | B | C | D | E | F | G |
1P | 77±1 | 72±1.5 | 18±0.55 | 42±0.8 | 66±1 | 45±0.8 | 35±0.8 |
2P | 75±1.5 | 36±0.8 | |||||
3P | 54±1 | ||||||
4P | 72±1 |
Outline and Dimension Indications (Figure3)
8.installation and adjustment
circuit breaker, pay attention to the following matters:
check the circuit breaker to make sure it is intact and flexible;
Check whether the sign of the circuit breaker meets the normal working conditions used.
circuit breaker. Install correctly.
cannot be adjusted by itself and maintenance is not required.
installation and removal methods:
Align the circuit breaker into the rail with the lower end of the mounting rail so thatcircuit breakerupward in the direction of the arrow, and press the arrow to push the recess to the upper end of the mounting rail with confidence, and let go.
contrary to the installation process, make the circuit breaker top up in the direction of the arrow and turn the circuit breaker in the opposite direction to remove it.
9.use and maintenance
circuit breakers (including packed products) shall not be attacked by rain during transportation and storage. The products shall be placed in an environment without rain and snow intrusion and air circulation, and the monthly average relative humidity shall not be greater90%(in20±5℃), the air temperature is not higher+40℃ and not less-25℃.
circuit breakers should be checked regularly during operation to remove dust and dirt on the incoming and outgoing lines and product surfaces. The power supply should be cut off during inspection. The inspection cycle depends on the working conditions.
