Multicore bushing insulators type *7-91 are used to transfer electrical signals in explosion-proof enclosures. These may be connections between one flameproof compartment and another explosion proof compartment conforming with the standard PN-EN 60079-0 or between different flameproof enclosures.
Explosion protection
Labeling
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
| Degree of protection | IP54 or IP65 |
| Ambient temperature | -20 ° C to + 40 ° C |
| Rated voltage | max 1140 V (depending on the version) |
| Rated current | max. 200 A (depending on the version) |
| Dimensions without grooves | 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 | * | . | * | . | * |
Degree of protection of the housing
none – IP54
1 – IP65
Rated voltage
1 – ≤ 250V
2 – ≤ 500V
3 – ≤ 690V
4 – ≤ 1000V
5 – ≤ 1140V
Height of the enclosure
1 – 110 mm
2 – 150 mm
3 – 95 mm
Other elements of the equipment (e.g. number and type of inlets, connectors) should be agreed individually with the manufacturer.