Complex Transformer Equipment of Mine Explosion-Proof Electric Coal Drill used in underground mine.

The series mining flame-proof coal electric drill transformer integrated unit used in underground mine which has explosive gas mixture in surrounding atmosphere, hand-held special tool (electric coal drill) for controlling mining coal face of drilling and shooting, according to the rules of Coal Safety Regulation Clause. 457 ( 2004), this unit has the function of remote open and close the coal electric drill, leakage electric locking,  short-circuit, overload, phase-failure and leakage protection, etc.

Technical parameter of ZBZ Complex Transformer Equipment of Mine Explosion-proof Electric Coal Drill 

Type/ Specification	Rated capability  (KV)	Capability of Main Transformer			The Power of the Controlled Electric Drill (KW)	Leakage Protection		overload protection
		Connection Mode	Rated Voltage (V)	Rated Current( A)		Working Value	Working Time
ZBZ-2.5/ 660(380)Z	2.5	Y/Δ	660/133	2.19/10.8	1.2	Can be adjusted from 1~3KΩ	<0.1s	Can be adjusted from 10A to 30A
		Δ/Δ	380/133	3.79/10.85
ZBZ-2.5/ 1140(660)Z	2.5	Y/Δ	660/133	2.19/10.85
		Δ/Δ	1140/133	1.26/10.85
ZBZ-4.0/ 660(380)Z	4	Y/Δ	660/133	3.50/17.4	2.2
		Δ/Δ	380/133	6.1/17.4
ZBZ-4.0/ 1140(660)Z	4	Y/Δ	660/133	3.50/17.4
		Δ/Δ	1140/133	2.02/17.4
ZBZ-2.5/ 660(380)M	2.5	Y/Δ	660/133	2.19/10.8	1.2	Can be adjusted from1~3KΩ	<0.1s	Can be adjusted from 10A to 12.14A
		Δ/Δ	380/133	3.79/10.85
ZBZ-4.0/ 660(380)M	4	Y/Δ	660/133	3.50/17.4	2.2
		Δ/Δ	380/133	6.1/17.4

Complex Transformer Equipment of Mine Explosion-proof Electric Coal Drill(ZBZ )