Insulating and flameproof bushing type IPO-G .. and IPO-W ..


Izolacyjny Przepust Ognioszczelny


Insulating IPO type flameproof bushings are used in the connection of electrical circuits between the chambers of casing of flameproof electrical devices of group I. IPO-W .. cylindrical flameproof connection.


Technical parameters of the IPO-G .. and IPO-W ..:

Cable type 1:
Cable type 2:rated voltage 600/1000V
Conductor cross-section:1,5mm2
Rated Current:10A / 1 wire
Environment:moderately chemically aggressive
Number of wires:1 – 3
1 – 5
1 – 8
1 – 12
1 – 24
Thread size (table 1):from M20x1,5 to M50x1,5
The dimension of the cylindrical bushing (table 2):from Ø20 to Ø50
Working temperature range:-20ºC ÷ +100ºC
Relative humidity:up to 95%
Work location:any
Temperature rise of the 24-wire bushing:<20ºC


Table 1 – Flameproof threaded insulating bushings IPO-G..:

Type of culvertNumber of wiresThread of the threaded connection
IPO-G201 – 3M20x1,5
IPO-G241 – 5M24x1,5
IPO-G321 – 8M32x1,5
IPO-G361 – 10M36x1,5
IPO-G381 – 12M38x1,5
IPO-G421 – 20M42x1,5
IPO-G451 – 20M45x1,5
IPO-G501 – 24M50x1,5


Table 2 – Insulating cylindrical flameproof bushings IPO-W..:

Type of culvertNumber of wiresThread of the threaded connection
IPO-W201 – 3Ø20
IPO-W241 – 5Ø24
IPO-W321 – 8Ø32
IPO-W361 – 10Ø36
IPO-W381 – 12Ø38
IPO-W421 – 20Ø42
IPO-W451 – 20Ø45
IPO-W501 – 24Ø50



Central Mining Institute on 18.07.2012 issued a supplementary WE-type examination certificate: KDB 06ATEX158U/4

IPO-G .. and IPO-W .. insulating flameproof culverts have the WE type examination certificate: KDB 06ATEX158U of 26.06.2006.

Central Mining Institute, Notified Body No. 1453 in accordance with Article 9 of Directive 94/9 / EC of 23 March 1994, confirms that the part or subassembly being the subject of this certificate meets the essential health and safety requirements for the design and construction of protective equipment and systems intended for use in potentially explosive atmospheres listed in Annex 2 to Directive 94/9 / EC (Chapter 2 of the Ordinance of the Minister of Economy of December 22, 2005, Journal of Laws No. 263, item 2203)

The basic requirements of safety and health protection were implemented by meeting the requirements of the standards:

  • PN-EN 60079-0:2009
  • PN-EN 60079-1:2010

IPO-G .. and IPO-W .. insulating fireproof bushings are marked with:

I M2 Ex d I Mb


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iconaInsulating and flameproof culvert type IPO-G .. and IPO-W..

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