HKel Electrical Appliances (Shanghai) Co., Ltd. is a professional low-voltage electrical appliances OEM licensing production and sales as one of the enterprises. Hangkai Professional Molded Case Circuit Breaker Manufacturer, mainly produces HKM1 Molded Case Circuit Breaker, HKM3 Molded Case Circuit Breaker, providing product maintenance, type selection, knowledge and other services. Tel: 021-57161889
MoreOverview of DC Molded Case Circuit Breakers:
The operating mechanism of DC plastic case circuit breaker has the functions of fast closing and fast breaking, compact structure, small volume and convenient use. It is suitable for DC power network circuits with rated voltage DC250V-DC1000V and rated current 10A-1250A. The circuit breaker has the functions of overload long-delay protection and short-circuit instantaneous protection. It is used to distribute electric energy and protect power lines and equipment from overload and short-circuit.
DC plastic case circuit breaker meets the standard:
1. General Provisions of IEC 60947-1 GB14048.1;
2. IEC60947-4-1 GB14048.4 contactor and motor starter;
3. IEC60947-2 GB14048.2 circuit breaker;
4. IEC60947-5-1 GB14048.5 electromechanical control device.
Functional characteristics of DC plastic case circuit breaker:
1. The operating mechanism has the functions of fast closing and fast breaking.
2. The installation of dynamic and static contacts in the contact arc extinguishing system is based on the principle of parallel conductors. The H-type static contacts can be repulsed, which is conducive to the fast breaking of high current. The components made of high arc-resistant materials are installed around the dynamic and static contacts, which is conducive to fast arc rest.
3. Compact structure and small volume;
4. Thermomagnetic, leakage, DC and intelligent unified shape size;
5. Accessories are installed independently. Users can install and replace accessories simply by opening the accessory cover.
6. Mechanical and electrical interlocking can be installed between two circuit breakers.
7. Zero or short flying arc, safe and reliable operation;
8. Easy to use, user can install on site;
9. Maintenance-free life of 10,000 times, including electrical life of 3,000 times, mechanical life of 7,000 times.
Conditions for use of DC plastic case circuit breakers:
1. The altitude of the installation site shall not exceed 2000m.
2. The ambient air temperature should not be higher than + 40 or lower than - 5 and the 24-hour average should not exceed + 35 except for special orders.
3. Relative humidity of the air at the installation site. The maximum temperature + 40 C should not exceed 50%. Higher relative humidity can be allowed at lower temperatures, such as up to 90% at 2O C. Special measures should be taken for the occasional condensation caused by the change of dry temperature.
4. There is no explosive dangerous medium in the air and no gas or conductive dust which can corrode metals and destroy insulation.
5. Where there is no rain or snow;
6. The pollution grade is 3.
7. Installation Category: Installation Category of main circuit of circuit breaker is III, and installation Category of auxiliary circuit and control circuit which are not connected to main circuit is II.
8. Circuit breakers should be installed and used according to the instructions of the products.
The source of this article is reproduced in Baidu Encyclopedia by Hangkai Electrical Appliances (Shanghai) Co., Ltd. http://www.hangkaiele.com/.
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