Nema Device Numbers: 21 - 30

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  1. 21
    Distance Relay
  2. 22
    Equalizer Circuit Breaker
  3. 23
    Temperature Control Device
  4. 24
    Volts Per Hertz Relay
  5. 25
    Synchronizing or Synchronism Check Device
  6. 26
    Apparatus Thermal Device
  7. 27
    Undervoltage Relay
  8. 28
    Flame Detector
  9. 29
    Isolating Contactor or Switch
  10. 30
    Annunciator Relay
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141265
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Nema Device Numbers: 21 - 30
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Nema Device Numbers: 21 - 30
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