PREM-GO flameproof switchgear is dedicated for electrical energy distribution in alternating current grids with rated frequency of 50 Hz and operating voltage up to 10 kV. Primarily in underground mining plants.
PREM-GO flameproof switchgear is designed for methane-free and methane areas, mining headings classified under methane explosion and coal dust explosion hazard categories.
Equipment will automatically trip-off in case if allowed methane gas concentration will be exceeded.
PREM-GO flameproof switchgear is indoor, stationary, free-standing, draw-out type, double compartmented switchgear, which consists of PREM GO** cubicles. The insulated bulbar system of this air-insulated switchgear contains IZP Ex type busbar-bushing insulators and IZM Ex type spout insulators manufactured by ELEKTROBUDOWA SA.
Switchgear cubicle is electrical-arc resistant (pressure rise), occurring inside the enclosure in case of eventual arc fault.
Flameproof enclosure withstands the explosion pressure and effectively prevents the explosion distribution to the outside of the enclosure without damage and permanent deformation of the cubicle.
|Type of the switchgear||PREM-GO **|
|Power frequency withstand voltage||kV||20/38|
|Lightning impulse withstand voltage||kV||60/75|
|normal of main busbars
witch a circuit breaker
witch a contactor
short-time withstand current
peak withstand current
|up to 1250
up to 1250
up to 400
up to 25/1
up to 63
|Internal arc withstand current||kA/s||25/0,3|
|Degree of protection||IP 54|
|WE type test certificate||KDB 12 ATEX 0091X|
|Explosion proof design marking||I M2 Ex [ia, Ma] d I Mb|
|Dimensions of cubicles:|
|Internal Arc Classification||BFLR|
|Compliance with standards||PN-EN 60079-0, PN-EN 60079-1, PN-EN 60079-11, PN-EN 60079-28|
Product card in pdf format Switchgears for mining industry PREM-GO series plik .pdf
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