1. Function
Mine explosion-proof low voltage side protection box for mobile substation is applicable in
underground coal mines with explosive and dangerous gas (methane) and coal dust, it is
equipped on low voltage side of dry type transformer for mine explosion-proof type mobile
substation, it is a mine explosion-proof type mobile substation when it is combined with dry
type transformer for mine explosion-proof type mobile substation and mine explosionproof type high-voltage vacuum distribution device. It can detect each kind of fault of lowvoltage network and send the fault signal to high-voltage vacuum distribution device for
cutting off high-voltage power supply.

2. Model



3. Characteristics
3.1 Real-time English display work data such as parameter of three-phase current, threephase voltage, insulating resistance etc.
3.2 Standard RS485 communication interface.
3.3 Various kinds of protective functions for overload, short circuit, under voltage, over
voltage, loss of phase, electric leakage, three-phase imbalance, fan and power supply
lockout, gas lockout etc.
3.4 It realizes cutting off power supply on high-voltage side for fault on low-voltage side by
being equipped with mine explosion-proof type high-voltage vacuum distribution
device as mine explosion-proof type mobile substation.