Locked rotor or Stall or Jam protection are one and same in protection philosophy. Difference comes only if protection used during motor starting condition or running condition i.e Locked rotor during starting, Starting Stall, Jam during starting are one and same. Similarly Locked rotor during running, Running Stall, Jam during running are one and same. Different relay manufacturers often confuses by interchangeably using these words
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Difference between lock rotor & Stall protection.
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Locked rotor or Stall or Jam protection are one and same in protection philosophy. Difference comes only if protection used during motor starting condition or running condition i.e
Locked rotor during starting, Starting Stall, Jam during starting are one and same.
Similarly Locked rotor during running, Running Stall, Jam during running are one and same.
Different relay manufacturers often confuses by interchangeably using these words