Specification for control and interlock circuits primarily associated with flameproof restrained plugs and sockets for use in coal mines

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-12-1986

Publisher

British Standards Institution

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Control circuit requirements
4. Control circuit connections
5. Component requirements
6. Control circuit requirements when a resistor
proving system is provided
7. Interlock circuit requirements
Appendices
A. Associated controlled devices and systems
B. Conditions under which the control and interlock
circuit can be considered as intrinsically safe
Figures
1. Connections for remote control
2. Connections for local control
3. Connections for interlock circuits

Specifies characteristics and operating conditions, to ensure that components of control units both local and remote from the supply and control unit are interchangeable. Provides for optional interlock circuits and resistor proving systems.

This British Standard specifies requirements for control and interlock circuits which are required to be intrinsically safe and which are primarily associated with the pilot contacts of flameproof restrained plugs and sockets for use in coal mines. Provision is made for the control circuit to operate in local or remote control. When a resistor proving system is provided the operational requirements are given in clause 6.

NOTE 1. Appendix A gives recommended operational requirements for equipment using a control circuit complying with this standard.

NOTE 2. The titles of the publications referred to in this standard are listed on the inside back cover.

Committee	W/-
DevelopmentNote	Supersedes 85/74238 DC and BS 3101(1959) (07/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
DocumentType	Standard
Pages	10
PublisherName	British Standards Institution
Status	Current
Supersedes	BS 3101:1959