BZZ-2.5, 40 Mining Explosion proof Coal fired Drilling Integrated DeviceDetailed product description：

Scope and Application
BZZ-2.5、 The 40 mine explosion-proof coal-fired brick drill comprehensive device is suitable for remote control of 127V handheld coal-fired drills or rock drills in environments with explosive mixtures such as methane and coal dust in underground coal mines and surrounding media. It has functions such as short circuit, overload, leakage protection, and cable insulation risk reduction indication.

·Model and meaning


·Main technical parameters of BZZ-2.5 and 40 mining explosion-proof coal drill comprehensive device:

Model, Specifications	main transformer			Controlled electric drill Power (kW)	Leakage resistance action （kΩ）	earth leakage protection Action time (s)	Short circuit protection distance and Action Time
	Rated voltage (V)	Rated current (A)	wiring method
BZZ-2.5	660/133 380/133	two point two 3.6/10.9	Y/△ △/△	one point two	Factory setting value <1.5 (0-3 adjustable)	≤0.25	Protection distance 0-150mm Action time ≤ 0.25s