Molded case circuit breaker circuit breaker and frame difference
Molded case circuit breaker and frame circuit breaker with breaker products is widely used products, but many people do not understand the difference of the two, is in choose and buy when also often hesitate about what move to make. I faced some customers also often have such problems, so I according to this problem, consult factory three senior engineer, and they usually buy some experiences are summarized here, said moulded case circuit breaker and breaker framework for the difference between the two, as well as the use need to pay attention to the local.
Molded case circuit breakers applied to do the tributary protection switching
Frame breaker all parts are mounted in an insulated metal framework, often open, can be equipped with a variety of accessories, replacing the contact and the part is more convenient, more in the end of power switch. The overcurrent tripping device with electromagnetic, electronic and intelligent releaser of several. A circuit breaker having a long delay, short-time delay, instantaneous and grounding fault protection four segments, each kind of protection setting value according to its frame size in a certain range adjustment. Manual and electric operations have, along with the development of microelectronic technology, the intelligent circuit breaker having a zone selective interlocking function, and fully guarantee the action sensitivity and selectivity.
Molded case circuit breaker is earthing terminal, the outer contact arc-extinguishing chamber, breaker and operating mechanism are installed in a plastic outer shell, are generally not considered suitable for repair, slip protection switch, the overcurrent tripping device with electromagnetic and electronic two, general electromagnetic type molded case circuit breaker based on nonselective circuit breaker, only a long time delay and instantaneous two protected mode, electronic type molded case circuit breaker with long time delay, short time delay, instantaneous and grounding fault protection function four. Part of the electronic type molded case circuit breaker new products with zone selective interlock function. The majority of molded case circuit breaker for manual operation, some with motor operation.
Frame circuit breaker interrupting capacity and perfect function
Molded case circuit breaker with plastic structure, is characterized in that the circuit breaker enclosure, using the framework of plastic to suppress, contact, arc-quenching system are placed on the insulating chamber, preventing the interphase short circuit, ensure the arc sprayed upwards, to ensure reliable contact system of breaker. While the frame circuit breaker with modular structure, divided into frame, contact arc extinguishing system, a manual operating mechanism, operating mechanism, intelligent controller and a drawer seat part. Each part becomes a complete and independent parts, assembly only when 1-2 screws can be fixed, convenient assembly and disassembly for maintenance.
Molded case circuit breaker product variety, which is characterized by compact structure, easy operation, relatively simple function, the general configuration of overcurrent release and instantaneous tripping device, frame circuit breaker is perfect function, especially in recent years, single chip technology, frame circuit breaker with high performance, easy maintenance, network development.
At rated current, molded case circuit breaker for general 630A ( some new products can be achieved under 1600A ), while the frame breaker rated current to be much larger, usually 630A-6300A ( such as our company production of DW15, DW16 and DW17 series of frame breaker have achieved this standard ). In addition to the competence, frame circuit breaker molded case circuit breaker high than.
In practical application, the 800A above the loop or the competence requirements are particularly high loop or need more functional loop should adopt frame breaker, following the 630A loop, the general use of molded case circuit breaker.
The information above in electrical switch factory provide for reference, www.jiandq.com