The flameproof OSR *.*.* type distribution box is used to connect and branch electrical circuits supplied via tire wires or cables. It is equipped with cable entries and connection terminals. The OSR *.*.* box is intended for operation in zones at risk of methane and/or coal dust explosion (group I), as well as in zones at risk of explosion of gases classified as group IIA and dusts classified as group IIIC. The junction box casing is an independent flameproof cover. Thanks to its compact and massive structure, it can be used in difficult operating conditions, without the need to use additional mechanical covers.

Ognioszczelna skrzynka przelotowo-rozgałęźna dla górnictwa

Explosion protection

I M2 Ex db I Mb
I M2 (M1) Ex db [ia Ma] I Mb
II 2G Ex db IIA T6 Gb
II 2(1) G Ex db [ia Ga] IIA T6 Gb
II 2D Ex tb IIIC T100°C Db
II 2(1) D Ex [ia Da] tb IIIC T100°C Db

Certificate: OBAC 08 ATEX 257

Rated values

Ingress protection rating IP54 or IP65
Ambient temperature
-20°C to +40°C
Rated voltage
max 1140 V  (depending on execution)
Rated current
max. 200 A (depending on execution)
Dimensions (without cable glands)
OSR 1.*.* 250 x 270 x 110 mm
OSR 2.*.* 250 x 270 x 150 mm
OSR 3.*.* 170 x 235(275) x 95 mm


O S R * . * . *

Housing protection
none – IP54
1 – IP65

Rated voltage
1 – ≤ 250V
2 – ≤ 500V
3 – ≤ 690V
4 – ≤ 1000V
5 – ≤ 1140V

Housing height
– 110 mm
2– 150 mm
3 – 95 mm

Other elements of equipment (e.g. number and type of cable glands, connectors) should be agreed individually with the manufacturer.