What are the steps of using DC Molded Case Circuit Breaker?

DC Molded Case Circuit Breaker is used in industrial and urban low-voltage factories, with working current from 1 - 1000A. They are installed in DC and AC distribution cabinets for motor protection (motor control centers), generator protection, capacitor protection and end-users.

What are the main features of the DC Molded Case Circuit Breaker?

What should be paid attention to when using DC Molded Case Circuit Breaker?

What does DC Molded Case Circuit Breaker maintenance work include?

What are the main features of the DC Molded Case Circuit Breaker?

1. Structure and working principle of DC Molded Case Circuit Breaker The low-voltage circuit breaker is composed of operating mechanism, contacts, protection devices (various releases), arc extinguishing system, etc.

2. The role of the DC Molded Case Circuit Breaker is to cut off and connect the load circuit, as well as cut off the faulty circuit, prevent the accident from expanding, and ensure safe operation.

3. The high-voltage circuit breaker needs to break 1500V arcs with a current of 1500 to 2000A. These arcs can be stretched to 2m and continue to burn without being extinguished. Therefore, arc extinguishing is a problem that high-voltage circuit breakers must solve.

What should be paid attention to when using DC Molded Case Circuit Breaker?

The DC Molded Case Circuit Breaker will not trip if the fault current exceeds the Ultimate Short Circuit Breaking Capacity. In this case, another protection mechanism with higher breaking capacity must be operated. This demonstrates the operational reliability of the DC Molded Case Circuit Breaker.

It should be noted that if the fault current exceeds Ics but not IcuDC Molded Case Circuit Breaker can still be troubled, but may be damaged and need to be replaced.

We need to pay attention to the mechanical life when using, this is the maximum number of times the DC Molded Case Circuit Breaker can be manually operated before it fails. At the same time, we also need to focus on electrical life, which is the maximum number of times a DC Molded Case Circuit Breaker can trip before it fails.

What does DC Molded Case Circuit Breaker maintenance work include?

DC Molded Case Circuit Breakers withstand high currents; therefore, maintenance of DC Molded Case Circuit Breakers is critical to reliable operation. Some maintenance procedures are discussed below:

1. Visual inspection

When doing a visual inspection of the DC Molded Case Circuit Breaker, it is important to look for deformed contacts or cracks in the case or insulation. Any burn marks on the contacts or housing should be handled with care.

2. Lubrication

Some DC Molded Case Circuit Breakers require adequate lubrication to ensure smooth operation of the manual circuit breaker and internal moving parts.

3. Cleaning

Dirt deposits on the DC Molded Case Circuit Breaker can degrade the DC Molded Case Circuit Breaker components. If the dirt includes any conductive material, it can create current paths and cause internal failures.

4. Test

Three main tests were performed as part of the DC Molded Case Circuit Breaker maintenance program.

Zhejiang Shilong Electric Technology Co., Ltd has focused on the development and production of DC Molded Case Circuit Breakers for several years. And it commits to providing perfect service for every customer from all over the world.