Nowadays, electric furniture is not only more and more common in our life, but also more and more electric furniture brands are going abroad and sold to the world. The motor is an important component to provide power for electric furniture,
ankor Jie will simply lower the motor U for everyone. l 1004 certification standards applicable motor type and motor locked rotor test method.
Product range to which UL 1004 standard applies:
name of UL 1004-1 Standard: General Requirements for Rotating Electrical Machines (Rotating Electrical Machines - General Requirements)
Product range to which UL 1004-1 applies:
1. Including field-installed and factory-installed wound rotating motors with a rated voltage of 460 volts or less, and all other AC and DC rotating motors and linear motors with a rated voltage of 1000 volts or less;
(2) Does not include motors applicable to hazardous locations under the National Electrical Code NFPA 70;
3. Excluding hermetic electric compressors, this type of motor needs to be evaluated according to UL 984 standards.
UL 1004-2 Standard Name: Impedance protection motors (Impedance Protected Motors)
Product range to which UL 1004-2 applies:
1. Suitable for motors with rated voltage of 600 volts and below, relying only on the impedance of the motor winding to prevent overheating;
UL 1004-2 supplements or amends the requirements of UL 1004-1. Except as stated in UL 1004-2, other requirements are based on UL 1004-1.
UL 1004-3 Standard Name: Thermal protection motors (Thermally Protected Motors)
Product range to which UL 1004-3 applies:
1. Suitable for motors that rely on thermal motor protectors to prevent overheating under at least one operating condition;
2. Suitable for impedance protection motor with auxiliary thermal motor protector;
UL 1004-3 supplements or amends the requirements of UL 1004-1. Except as stated in UL 1004-3, other requirements are based on UL 1004-1.
Unprotected Motor Stall Test, Standard UL 1004-1
3. Connect the test voltage according to UL 1004-1 Table 30.1;
4. The locked-rotor test is carried out at room temperature. When the thermocouple monitoring temperature reaches the maximum temperature of UL 1004-1 Table 42.1, the power supply is disconnected until the temperature drops to the minimun temperature of Table 42.1. Press this cycle to test for 18 days.
Motor stall test for impedance protection, standard UL 1004-2
5. After 15 days of blocked rotation, the second withstand voltage test shall be carried out according to UL1004-1 Table 43.1.
Motor stall test with thermal protection, standard UL 1004-3
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