1-10 Ansi Standard Device Function Numbers For Automatic Switchgear

Front 1

1

Back 1

Master element

Front 2

2

Back 2

Time delay starting or closing relay

Front 3

3

Back 3

Checking or interlocking relay

Front 4

4

Back 4

Master contactor

Front 5

5

Back 5

Stopping device

Front 6

6

Back 6

Starting circuit breaker

Front 7

7

Back 7

Rate of change relay

Front 8

8

Back 8

Conttol power disconnecting device

Front 9

9

Back 9

Reversing device

Front 10

10

Back 10

Unit sequence switch