Shanghai Huabang Industrial Business Network - Explosion proof relay

[Explosion proof relay]JJB-660/380 Mining explosion-proof leak detection relay

2026-6-13 19:30:29

JJB-660/380 (formerly JY82-380/660A, B) mining explosion-proof leak detection relay is suitable for underground coal mines with explosive gases and coal dust. In a three-phase neutral point to ground insulated power supply network with AC 50Hz and voltage up to 660V, it cooperates with the main feeder switch to achieve first level leakage protection or two-level selective leakage protection, to prevent personal electric shock accidents and limit the expansion of other accidents caused by leakage.

JJB-660/380 Mining Explosion proof Leak Detection Relay Model

Technical parameters of JJB-660/380 mining explosion-proof leak detection relay

Network voltage		380V	660V
Action resistance value		3.5K��	11K��
Single phase path 1K �� grounding action time	Without delay	��50ms	300~400ms
	Add delay
After compensation, the maximum ground current for single-phase grounding through a 1K �� resistor			120A

Note:
(1) The network distribution capacitance of the ground current after compensation is 0~1 microfarads per phase to ground;
(2) The contact group of the relay in the product can divide 1A current in a network with a voltage of 600V, frequency of 50Hz, and COS diameter of 0.4.

[Explosion proof relay]JY82-2/3 Mining explosion-proof leak detection relay

2026-6-13 18:46:08

·Scope and Application

JYB82-2/3 mining explosion-proof leak detection relay is suitable for underground coal mines with explosive gas mixtures (methane) and coal dust. In a three-phase neutral point insulated power supply network with AC 50Hz and voltage of 660V or 380V, it cooperates with the main feeder switch to achieve one pole leakage protection or two pole selective leakage protection, to prevent personal electric shock accidents and limit the expansion of other accidents caused by leakage.

·Model and meaning

·Main technical parameters of JY82-2/3 mining explosion-proof leak detection relay:

Model, Specifications	Network voltage ��V��	Action resistance value ��k��	Single phase grounding action time of 1k ��		Compensated single-phase 1k �� Maximum ground current mA for resistor grounding
			No delay ms	Add delay ms
JY82	three hundred and eighty	three point five	��50	300-400	��120
	six hundred and sixty	eleven

Note: a. The network distribution capacitance of the ground current after compensation is pseudo. 1 microfarad/per phase to ground;
b. The contact group of the relay in the product can switch on and off 1 ampere current in a network with a voltage of 60V, frequency of 50Hz, and COS �� pseudo. 4.