UL Standard for Safety Electronically Protected Motors
|Publication Date:||21 June 2018|
This Standard is intended to be read together with the Standard for Rotating Electrical Machines - General Requirements, UL 1004-1. The requirements in this Standard supplement or amend the requirements in UL 1004-1. The requirements of UL 1004-1 apply unless modified by this Standard.
Motors covered by this Standard, whose overheating protection is provided by an electronic circuit, shall additionally comply with the requirements contained in the Standard for Thermally Protected Motors, UL 1004-3, with regard to Construction, Performance, Manufacturing and Production Tests, Markings, and Instructions unless modified by this Standard.
This Standard applies to motors that rely upon an electronic circuit to prevent overheating of the motor.
The requirements in this Standard are intended to evaluate a specific motor/electronic protector combination. When the motor, the electronic protector, or the motor/electronic protector combination is changed, the combination shall be reevaluated.
The requirements in this Standard do not cover sealed (hermetic) type compressor motors.
This Standard does not apply to motors that comply with the Standard for Impedance Protected Motors, UL 1004-2, or the Standard for Thermally Protected Motors, UL 1004-3, independent of the electronic circuit.