ANSI/IEEE DEVICE NUMBERS

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Last updated 8:19 PM on 7/9/26
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17 Terms

1
New cards

25

Synchronizing or Synchronism-Check Device

2
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27

Undervoltage Relay

3
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32

Directional Power Relay

4
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43

Manual Transfer or Selector Switch

5
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46

Phase-Balance Current Relay

6
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47

Phase Sequence or Phase-Balance Voltage Relay

7
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50

Instantaneous Overcurrent Relay

8
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51

AC Time Overcurrent Relay

9
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52

AC Circuit Breaker

10
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55

Power Factor Relay

11
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59

Overvoltage Relay

12
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65

Governor

13
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72

DC Circuit Breaker

14
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81

Over/Under Frequency Relay

15
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83

Automatic Selective Control or Transfer Relay

16
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86

Lockout Relay

17
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87

Differential Protective Relay