Welcome to Shenzhen KINRI Energy Technology Co.,Ltd. official website!
Language：

Shenzhen KINRI Energy Technology Co.,Ltd.

SHENZHEN KINRI ENERGY

Huizhou (HK) Yingyuan Technology

Support Hotline

137-2371-6834 Timber (WhatsApp)

Shenzhen KINRI Energy Technology Co.,Ltd.
Knowledge
Current Location: Home > Knowledge > Knowledge

Knowledge

0755-29665062

Certificate

Shenzhen KINRI Energy Technology Co.,Ltd.
Knowledge

What is the difference between PC level and CB level dual power switch?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.28
In many critical electric fields, the stable supply of electricity undoubtedly becomes the top priority to ensure smooth operation. For this reason, we often ensure the reliability of power supply by installing a dual power switch. When the main power supply is interrupted for some reason, this switch can quickly switch to the backup power supply, thereby avoiding the inconvenience and losses caused by power outages. The dual power switch market is full of options, with PC and CB grades being the most common. So, what is the difference between these two and how should we choose? Let's compare and analyze below.



Let's first take a look at the concept:

PC level: capable of connecting, carrying, but not used for breaking short-circuit currents.

Choose a load switch without an overcurrent release as the actuator. It does not have a protective function, but it has a high tolerance and connection ability, which can ensure the safety of the switch itself and not be damaged due to overload or short circuit faults, ensuring reliable connection of the circuit in this situation.

CB level: equipped with overcurrent release, its main contact can be connected and used to break short-circuit current.

Choose a circuit breaker with an overcurrent release as the actuator. Equipped with selective protection function, it can provide short circuit and overload protection for the load and cable at the lower end; Its ability to make and break is much greater than using other components such as contactors and relays.

Due to the different design structures of the two switching switches, there are differences in their performance. Let's analyze the following main differences to understand how to choose between 

PC grade or CB grade:

1) Action time: There is a significant difference in action time between the two, such as in an operating room, which usually requires a switching time of less than 0.5 seconds. In similar situations, PC level must be selected;

2) Reliability: The purpose of installing a dual power switch is to provide safer and more reliable power supply; From this perspective, choosing a PC grade would be better;

3) Protection function: Due to different actuators, PC level has no overload and protection functions. From this perspective, it cannot be said which is better, PC grade or CB grade. It depends on whether the distribution system requires overload and short circuit protection. For example, for fire loads, according to regulatory requirements, overload protection should not be installed or overload protection should only act on alarms. Obviously, PC level can meet the usage requirements, while CB level depends on the protection function of the circuit breaker.

From the above analysis, the performance of PC grade is better, and it is also the mainstream dual power switching switch that can meet the requirements of most situations. But it doesn't mean that CB level cannot be used, and there is not a high requirement for switching time. In situations where the circuit breaker can match the system protection, CB level can be chosen completely, after all, the price is more affordable. As for reliability, it is a relative concept that requires a balance between reliability and economy, with a degree in everything.
Back List
Shenzhen KINRI Energy Technology Co.,Ltd.

Scan And Follow Us

  • Phone:+86-137-2371-6834 Timber (WhatsApp)
  • Tel:+86-0755-29665062
  • Email:mkt1@jinruipower.com
  • Add: No. 13A16 Huafeng International Commercial Building, No.4018 Bao’an Avenue, Xixiang, Baoan District, Shenzhen China
Copyright © 2009 Shenzhen KINRI Energy Technology Co.,Ltd. All Rights Reserved.
Clients: Mexican Telecom, ZTE, Mindray, Sony, Microsoft, Toshiba, Ohm Electronics, MT, MG and so on international famous brands