Protective device for electric motors

Details Protective device for electric motors Protective device for electric motors

1992-04-24

1994-06-21

Logan, Sharon D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 25, 361 27, 361103, H02H 708

Patent

active

053232879

ABSTRACT:
A protective device for electric motors for protecting electric motors from high operational temperatures, has an element for determining an operational temperature of an electric motor and an element for automatically switching off of the electric motor when a predetermined limiting operational temperature is exceeded. The determining element is formed as electronic element for determining the operational temperature indirectly from an at least another operational parameter of the electric motor. The element for automatically switching off is formed as electronic element for automatically switching off of the electric motor.

REFERENCES:
patent: 4547826 (1985-10-01), Premerlani
patent: 4573132 (1986-02-01), Boothman

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