Jhok-zbg2 leakage relay

brand ：JOSEF Joseph

Product model ：JHOK-ZBG1 20/5A 75/5

Action current ：0.03mA~9.99A

Working voltage ：AC220V/AC380V

Action time ：0.02~99.99S

Installation mode ： Guide rail in cabinet / Embedded panel

Zero sequence aperture ：25mm~220mm

Host size ：883660mm

The product name ： Multi shift leakage （ The remaining ） Relay

One 、 Product overview

JHOK-ZBG series

Leakage relay （ Hereinafter referred to as relay ） Suitable for AC voltage to 660V Or higher TN、TT、 and IT System , The frequency is 50Hz. Detect the zero sequence current exceeding the setting value through the zero sequence current transformer （ The remaining ） Leakage current . The relay is connected with the circuit breaker of shunt release or voltage loss release 、 AC contactor 、 Magnetic starter and other components of leakage protection device , For leakage and electric shock protection , Can be equipped with buzzer 、 Signal and other acoustooptic devices are combined to form a leakage alarm device . Derive multiple models , Prefix such as HLJ、RLJ、ULJ Series and other models , It is actually a similar product . It plays a very important role in the power system , It is the basis to ensure the reliability of power supply .

Two 、 Product use

The leakage protection relay has small volume 、 Easy to install and use 、 Reliable movement 、 Continuous power supply is stable and easy to operate . Can adapt to users everywhere , It can be used to protect the line from ground fault , It is mainly used to prevent equipment accident or electrical fire caused by grounding fault current , It can also be used to provide indirect contact protection for the release of human electric shock .

The leakage relay can be connected with the circuit breaker with shunt release or voltage loss release 、 AC contactor 、 Magnetic starter and other components of leakage protection device , For leakage and electric shock protection , It can also be equipped with buzzer 、 Signal lamp and other acousto-optic devices are combined to form a leakage alarm device . With reset 、 instructions 、 Call the police 、 Reset and other functions .

It is not suitable for the central grounding point of power supply or direct grounding system 、 Low voltage distribution system . It is a network reform product for safe use . The action time of the relay is divided into fast type and delay type , When used together, the trunk line and branch line shall be protected by classification , It can completely replace the past LLJ-□F（S）、LLJ-□H（S）、JD1 And JD3 Series leakage relay .

3、 ... and 、 Product parameters

● Rating

Voltage rating ： Rated voltage AC380V、AC660V、AC690V、AC1140V.

Working voltage value ：DC24V、AC110V、AC127V、AC220V、AC380V. It can also be customized according to customer requirements .

Allowable variation range of power supply voltage ： The voltage variation is the rated voltage 0.7 to 1.3 Times or wide power circuit .

Rated current value ：16A、25A、32A、40A、63A、80A、100A、125A、200A、250A、320A、400A、630A、800A、1000A、1500A、1600A、2000A. Non standard point current can also be customized .

● Action value

Leakage action current ： General or user-defined , Can also be 50-500mA Split gear or adjustable .

Leakage non action current ： Half of the leakage action current .

Leakage action time ： Delay type 0.2-2S.

Fast type ≤0.1S .

● Important parameter

The aperture of the transformer is round （L type ）：M25、M45、M75、M100、M150、M160、M220.

Rectangular square （ Runway type ）：45160、45220、45260、45320、45*450 etc. .

Four 、 working principle

The relay is an electronic current operated leakage relay , It is mainly composed of zero sequence current transformer 、 Electronic circuits 、 The working principle of the test circuit and outlet relay is as follows ： The wiring is shown in the figure （1）, Zero sequence transformer passing through the main line , When there is no leakage in the main line , The sum of vectors is equal to zero or minimal , When there is leakage or electric shock on the main line , The zero sequence transformer senses an unbalanced current vector and signal , When the circuit of zero sequence current transformer leaks to the ground iA+iB+iC≠0. Send it to the host for amplification , Check whether the leakage current exceeds the setting value , And send the results to the actuator for execution . At this time, the zero sequence current transformer will generate an induction signal , This signal is processed by electronic circuit , When the leakage current reaches the action value , Make the thyristor contact and make the relay act , Use relay normally open 、 The closing point controls the disconnection of the main circuit breaker or contactor , Cut off the fault line to achieve the purpose of protection . The test circuit is composed of resistors, buttons and other components , Press the test button , There is a current flowing through the transformer , Equivalent to the leakage current of the main line , The indicator light is on , The outlet relay should be able to act . Press the reset button , The light goes out , Outlet relay returns .

5、 ... and 、 Order needs to know

Rated current of the product 、 Leakage current 、 Transformer aperture . Rated voltage and working voltage . If delay is required , You have to specify the time .

JHOK-ZBG2 Leakage relay

1. Prevent electric shock accidents caused by leakage of electrical equipment and electrical lines ;

2. Prevent single-phase electric shock accidents during power use ;

3. Timely cut off the single-phase grounding electric shock fault in the operation of electrical equipment , Prevent fire accidents caused by electric leakage .

The working principle of leakage relay is as follows : Zero sequence transformer will pass through the main line , When there is no leakage in the main line , The sum of vectors will be equal to 0 Or very small . however , If there is leakage in the main line , The zero sequence transformer can sense that the vector sum is unbalanced , And the current vector will also send a signal to the zero sequence transformer , And send the signal to the host for amplification , We can check whether the leakage current exceeds the setting value , If the current exceeds the setting value , We can send the test results to the actuator , Let the actuator carry out maintenance, etc . Another way is , If the main line leaks electricity , The indicator light will be on , The outlet relay will also have a certain action and send a signal .

Shanghai Joseph relay business department