Scan code consultation:
0755-2102 2109
Current location: Home Service Explosion proof certification and certificate of conformity
Three criteria for evaluating explosion-proof intrinsically safe circuits

SINO Testing Services

| 2024-04-10|Return

Intrinsically safe circuits should meet the following three basic criteria:

a) According to the protection level and equipment category specified for electrical equipment, when testing or evaluating circuits according to corresponding standard requirements, spark ignition should not occur. When evaluating, data related to voltage, current, and circuit parameters, such as capacitance and inductance at the ignition boundary, are required to assess the circuit as inherently safe from the perspective of spark ignition.

b) The temperature group of intrinsic safety devices should comply with the temperature requirements specified in the relevant standards of GB/T3836 to avoid ignition caused by hot surfaces. The temperature group is not applicable to the associated device. This criterion can be used to calculate or determine the maximum surface temperature of a component based on its known thermal characteristics and the maximum power it may withstand under appropriate fault conditions to meet specified requirements.

c) Intrinsically safe circuits should be fully isolated from other circuits. By specifying sufficient creepage distance and electrical clearance, as well as using reliable components that meet standard requirements (such as transformers and current limiting resistors).

Related Recommendations
Contact us
0755-2102 2109
Address: 1302-1, Building C, Kangjia Guangming Technology Center, No. 288 Xingxin Road, Guangming District, Shenzhen
Follow us
Copyright: Shenzhen Zhongnuo Testing Technology Co., Ltd. 粤ICP备18004888号
点击这里给我发消息 在线咨询
点击这里给我发消息 在线咨询