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.
Explosion protection
Marking:
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 |
Coding
| O | S | R | * | . | * | . | * |
Housing protection
none – IP54
1 – IP65
Rated voltage
1 – ≤ 250V
2 – ≤ 500V
3 – ≤ 690V
4 – ≤ 1000V
5 – ≤ 1140V
Housing height
1 – 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.