Distribution box for intrinsically safe circuits

1. The junction box complies with the simple equipment specified in GB 3836.4-2010 and can only be used in intrinsically safe circuits that have passed inspection.

2. During maintenance, the electrical parameters and model specifications of intrinsic safety circuits and components related to intrinsic safety circuits must not be changed!

1、 Scope of application

JHH-2 intrinsically safe circuit distribution box (hereinafter referred to as distribution box) is suitable for cable distribution and connection in communication systems in environments with dust and gas explosion hazards underground in coal mines. Distribution box execution MT

166-87 and Q/HHL34-2018 standards.

2、 Product Features

The junction box is made of flame-retardant and anti-static ABS plastic.

3、 Usage conditions

⑴ Atmospheric pressure: 80kPa~110kPa;

⑵ Environmental temperature: -5 ℃ to+40 ℃;

⑶ Average relative humidity: not greater than 95% RH (+25 ℃);

In situations where there is no severe vibration or impact;.

4、 Main technical parameters

The explosion-proof type of the junction box is intrinsically safe for mining use, which complies with the provisions of simple equipment in GB3836.4-2010, and the explosion-proof mark is Exib Ⅰ Mb.

⑵ Working voltage: ≤ 60V DC;

⑶ Working current: ≤ 2A DC;

⑷ Contact resistance: ≤ 0.01 Ω; (Under normal circumstances)