BKD19-400I Mining Explosion proof Vacuum Feed SwitchDetailed product description：

One purpose

BKD19-400 Ⅰ mining explosion-proof vacuum feeder switch is suitable for underground coal mines containing methane mixed gas and explosive hazards. It is used as a distribution main switch, distribution branch switch, or for infrequent starting of electric motors in power grids with neutral characteristics of AC 50Hz, rated voltage 1140V and below.

Two functions
Overload and short circuit multiples can be set through plug-in dialing;
It has protection functions such as short circuit, overload, and leakage lockout;
Equipped with wind power gas locking function;
Cooperating with JY82 leak detection relay can achieve leakage protection function.

Three technical parameters and specifications

model	Rated Current	Ultimate breaking capacity kA		short circuit protection		Overload protection setting range A	Selective leakage
		660V	1140V	Setting range A	Working hours
BKD19-400Ⅰ	four hundred	nine		600-2400	<100ms	120-400	nothing