BS 5620:1995

This standard BS 5620:1995 Specification for 200 A 1100 V flameproof restrained and bolted plugs and sockets for use in coal mines is classified in these ICS categories:

• 29.260.20 Electrical apparatus for explosive atmospheres

This British Standard specifies the constructional and test requirements for 200 A flameproof restrained and bolted plugs, sockets and plug coupling units suitable for single voltages of 650 V and 1 100 V and dual voltage of 650/1 100 V. They are primarily intended for use with mining apparatus which is connected to its power supply by means of a flexible cable.

Three types are covered and designated as:

• type 1S: 200 A, 650 V single voltage, restrained and bolted;
• type 1D: 200 A, 650/1 100 V dual voltage, restrained and bolted;
• type 2: 200 A, 1 100 V single voltage, restrained only.

Type 1 and 2 configurations are not interchangeable.

The plugs, sockets and plug coupling units incorporate three power contacts, a pilot contact for electrical interlocking and a scraping earth contact. The dual voltage plugs and sockets are intended for use either on a 650 V or 1 100 V supply, the appropriate arrangements including selection of voltage by orientation of insulator and pins to ensure non-interchangeability for other than the appropriate voltage.

In addition to the definitive requirements, this standard also requires the items detailed in clause 3 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied.

NOTE The figures in this standard show only those features and dimensions essential for function interchangeability.

Specifies constructional and test requirements for 650V and 650/1100V restrained and bolted types and also 1100V restrained type only.