Intrisically-safe remote-control circuits associated with restrained plugs and sockets for use in coal mines
Design and operating conditions to ensure that remote-control units distant from gate-end boxes can be used with any gate-end box whose circuit complies with the specification. Essential components with reference to basic circuit; limits of voltage, current, resistance, temperature in relation to ci...
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| Language: | English |
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London
BSI
1959
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