English

Zonsen

Language

English

NEWS

home

/

/

/

Why can't the miniature circuit breakers be used in the reactive power capacitor compensation cabinet?

Why can't the miniature circuit breakers be used in the reactive power capacitor compensation cabinet?

Categories:Industry News
Author:
Origin:
Time of issue:2021-05-20
Views:

(Summary description)The reactive power low voltage capacitor compensation cabinet is installed on the outlet side of the transformer. In the event that any of branch circuit of the in reactive power low voltage capacito

Why can't the miniature circuit breakers be used in the reactive power capacitor compensation cabinet?

Why can't the miniature circuit breakers be used in the reactive power capacitor compensation cabinet?





Why can't the miniature circuit breakers be used in the reactive power capacitor compensation cabinet?

(Summary description)The reactive power low voltage capacitor compensation cabinet is installed on the outlet side of the transformer. In the event that any of branch circuit of the in reactive power low voltage capacito

Categories:Industry News
Author:
Origin:
Time of issue:2021-05-20 14:30
Views:

Information

The reactive power low voltage capacitor compensation cabinet is installed on the outlet side of the transformer. In the event that any of branch circuit of the in reactive power low voltage capacitor compensation cabinet is short circuited of each , this is equivalent to the short circuit of the transformer outlet, and the short circuit current is quite large, which can reach more than 20kA. For example, it is not reasonable for each branch circuit of the reactive power low voltage capacitor compensation cabinet to use the micro circuit breaker as its short circuit protection, because the maximum breaking current of the micro circuit breaker is only 15 kA, which obviously can not performing the switching off function, resulting in the short circuit in two phase or three phases of the reactive power low voltage capacitor compensation cabinet, and the components of each branch circuit may be subjected to accidents such as damaged, burned down and explosions; or in other cases, the transformer outlet circuit breaker may perform abnormal tripping, resulting in forced power outage of all the electrical equipment on the output end of the transformer, this may seriously affect the lives and work of the user and inestimable losses will be resulted in!

cabinet

Losses which are caused by the short circuit protection that has a switching on and switching off capacity which is not sufficient

The micro circuit breaker is used as the overload and short circuit protector. In the case of an overload or short circuit, its current is large, the fuse element emits heat and reaches the melting point and then melts. At this time, the circuit is disclosed to play the role of protection. On the micro circuit breaker, the rated breaking capacities of 4.5kA,6kA,10kA and so on are available, which are quite below the values of overload current and the short circuit current. On the other hand, the breaking current of the fuse can be as high as 100kA. In the event of a short circuit, the fuse will quickly disconnect the short circuit current, stop the development of the accident. The short circuit breaking current of the fuse is completely determined by its physical characteristics, and there will never be the case in which the short circuit current can’t be disconnected or disconnected accidentally. So the roles of overload protection and short circuit protection are played in their real sense!

Comparisons made between the fuse and the miniature circuit breaker

	Fuse	Miniature circuit breaker
Operating principle	The metal conductor is used as the fuse element and mounted in series in the circuit. When the overload or short circuit current passes through the fuse element, it will become melted because of its own heating, thus disconnecting an electrical appliance in the circuit. The short circuit breaking current is completely determined by the physics characteristics and is an electrical equipment with physical characteristic.	It is composed of the operating mechanism, the contact, the protective device (all kinds of releases), the arc extinguishing system and so on, it has the mechanical characteristics. When the circuit is short circuited or seriously overloaded, the armatures of the overcurrent release are actuated, so that the free tripping mechanism acts and the main contacts shut down the main circuit. When the circuit is overloaded, the thermal element of the thermal release device causes the bimetallic sheet to bend and actuates the free trip mechanism. When the circuit is under voltage, the armatures of the undervoltage release are released.
Overload and short circuit breaking capacity	The breaking capacity is as high as 100KA.	The breaking capacity covers the range of 6~10KA
Breaking (response) time	Ampere-second characteristics: The action of the fuse element is realized by the melting of the melt element. When the current is large, the time required for the fuse element to melt is very short.	It is an electrical equipment with mechanical characteristic , its breaking time is long, its response is not timely, and it has the mechanical fatigue characteristics.

Based on the above analysis, it can be concluded that the micro circuit breakers can not be used as the overload and short circuit protection of the branch circuits of the reactive power low voltage capacitor compensation cabinet. Only the fuses can be used as the overload and short circuit protection of the branch circuits of the reactive power low voltage capacitor compensation cabinet!

DELITER has always regard the safety and reliability as the development concept of the company. It has committed to providing the users with theproducts of the best quality. In the new generation of intelligent reactive power low voltage capacitor compensation cabinet module, the fuses are fully used as the overload and short-circuit protection switches. As the result, the safety and reliability of the reactive power low voltage capacitor compensation cabinet are greatly improved. It has received warm welcome as soon as it was put into the market!

into the market!

Scan the QR code to read on your phone

Previous: An initial analysis on the reactive power capacitor compensation modes for the power distribution system

Next: How to choose a reactive power high voltage capacitor compensation cabinet?

Previous: An initial analysis on the reactive power capacitor compensation modes for the power distribution system

Next: How to choose a reactive power high voltage capacitor compensation cabinet?

Latest News

Why should reactive power compensation be carried out? What is the principle and form of reactive power compensation?

Why should reactive power compensation be carried out? What is the principle and form of reactive power compensation?

1、 Why should reactive power compensation be carried out? Reactive power is by no means useless power. In the AC power supply system, inductance and capacitance are essential loads, such as ferromagnetic loads such as motors and transformers. If there is no excitation of inductive reactive power, the equipment cannot work normally. For example, the line itself that transmits power at a fixed distance is a capacitive load. As long as it is transmitting power, it will be equivalent to the capacitor working. In other words, in the AC power supply system, the existence of reactive power is of great significance to the transmission and exchange of energy, which is indispensable, or the exchange system without reactive power can not work normally.

The significance of reactive power compensation

 2022-05--17

Improve power factor and treat harmonic-MEC

 2022-05--16

How to solve harmonic in Industry

 2022-02--25

LG Energy Center-20kV SVG

 2021-12--03

这是描述信息

2726472126

+86 17333251758

zsdnzl@gmail.com

Feidong Economic Development Zone LiuZi Road, Anhui Hefei，China

Whatsapp

+86 17333251758

E-mail

zsdnzl@gmail.com

Wechat

Wechat

TOP

Copyright © 2020 Anhui Zonsen Electric Power Technology Co,Ltd. Powered by www.300.cn 皖ICP备18026616号