Interlocking control device of multiple-unit train safety circuit
First Claim
1. An interlocking control device for a multiple-unit safety circuit, comprising:
- a protective grounding switch control branch which comprises;
a pantograph rising pneumatic circuit cut-off valve, a protective grounding switch turn-off pneumatic circuit cut-off valve and a protective grounding switch turn-off solenoid valve which are connected in series, whereinwhen high-voltage equipment of a multiple-unit train is under inspection and maintenance or is powered by an external power supply, a protective grounding switch is turned on, a cock of the pantograph rising pneumatic circuit cut-off valve and a cock of the protective grounding switch turn-off pneumatic circuit cut-off valve are rotated to open a cover of a key box, the protective grounding switch control branch is disconnected, the protective grounding switch turn-off solenoid valve connected in series in the protective grounding switch control branch is powered off to maintain the protective grounding switch in an on state; and
the cover of the key box is mechanically locked by means of the pantograph rising pneumatic circuit cut-off valve and the protective grounding switch turn-off pneumatic circuit cut-off valve.
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Accused Products
Abstract
An interlocking control device for a multiple-unit safety circuit is provided, which includes: a protective grounding switch control branch which includes: a pantograph rising pneumatic circuit cut-off valve, a protective grounding switch turn-off pneumatic circuit cut-off valve and a protective grounding switch turn-off solenoid valve which are connected in series. When high-voltage equipment of a multiple-unit train is under maintenance or is powered by an external power supply, a protective grounding switch is turned on, cocks of the pantograph rising pneumatic circuit cut-off valve and the protective grounding switch turn-off pneumatic circuit cut-off valve are rotated to open a cover of a key box, the protective grounding switch control branch is disconnected, the protective grounding switch turn-off solenoid valve connected in series in the protective grounding switch control branch is powered off to maintain the protective grounding switch in an on state.
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Citations
10 Claims
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1. An interlocking control device for a multiple-unit safety circuit, comprising:
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a protective grounding switch control branch which comprises;
a pantograph rising pneumatic circuit cut-off valve, a protective grounding switch turn-off pneumatic circuit cut-off valve and a protective grounding switch turn-off solenoid valve which are connected in series, whereinwhen high-voltage equipment of a multiple-unit train is under inspection and maintenance or is powered by an external power supply, a protective grounding switch is turned on, a cock of the pantograph rising pneumatic circuit cut-off valve and a cock of the protective grounding switch turn-off pneumatic circuit cut-off valve are rotated to open a cover of a key box, the protective grounding switch control branch is disconnected, the protective grounding switch turn-off solenoid valve connected in series in the protective grounding switch control branch is powered off to maintain the protective grounding switch in an on state; and the cover of the key box is mechanically locked by means of the pantograph rising pneumatic circuit cut-off valve and the protective grounding switch turn-off pneumatic circuit cut-off valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification