Electromagnetic Relay

Electromagnetic relay, EMR for short, controls the current through a coil to produce electromagnetic attractive force that drives the moveable part of the magnetic circuit. Then it achieves the opening, closing or switching of the contact.

 

Refer to diagram 1 of its working characteristic.

 

No matter what the structures of electromagnetic relays are, they are composed of inductive part(to receive input signal), comparative part(to provide comparison) and executive part(to output circuit).

 

Refer to diagram 2 of its working theory.

 

Notice for Purchasing

1. Model Number Structure

2. Combination Forms of Common Contact

Name	Definition	Structure Form	Symbol	Code
				USA	CHN
Normally Open Contact	Contact group that makes controlled circuit open after relay operates			H	A
Normally Closed Contact	Contact group that makes controlled circuit closed after relay operates			D	B
Transferable Contact	Contact group that makes one controlled circuit break at first, then makes another controlled circuit closed			Z	C

 

3. Load Property and Surge Current

Characteristics	Surge Current	Surge Time(s)	Remark
Resistance	Steady State Current	/	L ≤ 10-4H or COSF = 1
Inductivity	3~5 Times of Steady State Current	1~50	/
Electric Motor	5~10 Times of Steady State Current	0.2~0.5	Can use 5~6 times resistant load instead for testing
Lamp Property	10~15 Times of Steady State Current	1	/
Capacity	20~40 Times of Steady State Current	1~50	Long transmission line, filter and power supply should be considered as capacitive load
Wave

 

4. Installation Mode

Installation Mode	Structure Form	Product Model	Remark
Welding Type		Tip leading out terminal type of relay	Including PCB type
Socket Type		HH Series, 13F Series, LR Series, MK, JTX-10F, JQX-38F, JQX40-2Z	Including socket type
Screw Type		JQX-40/1Z, JQX-59F, JQX-60F, JQX-62F, JQX-63F, JQX-80F	/