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Hydropower > Device Names With Definitions > Flashcards

Flashcards in Device Names With Definitions Deck (9)
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1
Q

Master element

A

The initiating device to place an equipment in or out of operation

2
Q

Time delay starting or closing relay

A

Gives a desired amount of delay between operations in an automatic sequence

3
Q

Master contactor or relay

A

Generally controlled by device no. 1, to place an equipment into operation under the desired conditions and to take it out of operations under other or abnormal conditions

4
Q

Stopping device

A

Primary function is to place and hold an equipment out of operation

5
Q

Starting circuit breaker, contactor or switch

A

Principal function is to connect a machine to its source of starting voltage

6
Q

Anode circuit breaker

A

Used in the anode circuits of a power rectifier primarily to interrupt the rectifier circuit on arc back

7
Q

Control power switch

A

Manually operated switch or circuit breaker used for the express purpose of connecting and disconnecting the source of control power to and from the control bus or equipment

8
Q

Reversing device

A

Used to reverse the shunt field connections of a synchronous converter during the starting sequence or for other special reversing functions

9
Q

Unit sequence switch

A

Used to change the sequence of placing units in and out of service in multiple unit equipment

Decks in Hydropower Class (81):