Gain knowledge~Motor leads used to be so important. be shocked
What is the motor lead wire? How to choose motor leads?
The motor lead wire is an important component of motor products, and different types of cables need to be selected for different motors due to their own characteristics and special operating conditions. Due to the special process of coating the leads and windings of motor products simultaneously, there are industry standards that specify the characteristic requirements for motor cables. Mr. Zhang from the company has compiled some relevant requirements for directly and permanently connecting to the motor winding and leading out the casing or winding, and directly connecting the cable to the motor terminal post. He will share them with everyone.
Requirements for immersion painting
Cables usually need to undergo the same treatment as the connecting components, including immersion in impregnating paint and subsequent baking. Although cables include thermal effect tests and immersion paint resistance tests in type testing, users should still provide information to cable manufacturers regarding the grade of cable immersion paint used and the baking and curing treatment to further clarify the applicability of the cables.
Temperature related content
The maximum temperature of the conductor during continuous operation of the cable is independent of the "hottest point" temperature of the machinery or equipment connected to the cable. The classification of the heat resistance level of motor insulation involves the hottest point temperature of the coil winding, and the lead wire at the coil end is usually fixed at the lowest temperature of the coil winding. The temperature on the lead wire at the coil end is generally lower than that of the stronger winding connected to it. The following table lists typical cable selections based on the insulation temperature level of the motor. However, to accurately select cables, multiple factors should be considered, such as product design, product performance, and qualification tests related to installation conditions.
Common cable models, names, and characteristics for motors
Flexible cables and wires with a maximum temperature of 70 ℃ for continuous operation of conductors
Corresponding standard JB/T 6213.2
JV PVC insulated motor winding lead cable (wire)
JF Nitrile Polyvinyl Chloride Composite Insulated Motor Winding Connection Cable (Wire)
Usage characteristics: AC rated voltage is 500V; The maximum temperature of the conductor during continuous operation is 70 ℃; The allowable bending radius for cable (wire) laying should not be less than 4 times the outer diameter of the cable (wire).
Flexible cables and wires with a maximum temperature of 90 ℃ for continuous operation of conductors
Corresponding standard JB/T 6213.3
JE Ethylene Propylene Rubber Insulated Motor Winding Connection Cable (Wire)
JEH Ethylene Propylene Rubber Insulated Chlorosulfonated Polyethylene Sheath Motor Winding Connection Cable (Wire)
JEM Ethylene Propylene Rubber Insulated Chlorinated Ether Sheath Motor Winding Connection Cable (Wire)
J H chlorosulfonated polyethylene insulated motor winding lead cable (wire)
Usage characteristics: The AC rated voltage of cables (wires) is 500V, 1000V, 3000V, 6000V, and 10000V; The maximum temperature of the conductor during continuous operation is 90 ℃; When laying cables (wires), the bending radius should not be less than 4 times the outer diameter of the cable (wire).
Flexible cables and wires with a maximum temperature of 180 ℃ for continuous operation of conductors
Corresponding standard JB/T 6213.4
JG silicone rubber insulated motor winding lead cable (wire)
Usage characteristics: The AC rated voltage of cables (wires) is 500V, 1000V, 3000V, 6000V, and 10000V; The maximum temperature of the conductor during continuous operation is 180 ℃; When laying cables (wires), the bending radius should not be less than 4 times the outer diameter of the cable (wire).
● Fluorine resistant flexible wire
Corresponding standard JB/T 6213.5
JZ polyester insulated freon resistant motor winding lead flexible wire
JF46 perfluoroethylene propylene insulated freon resistant motor winding connection flexible wire
Usage characteristics: The AC rated voltage of the cable (wire) is 500V; The allowable bending radius for cable (wire) laying should not be less than 4 times the outer diameter of the cable (wire).
Flexible cables and wires with a maximum temperature of 125 ℃ and 150 ℃ for continuous operation of conductors
Corresponding standard JB/T 6213.6
JYJ125 125 ℃ Cross linked Polyolefin Insulated Motor Winding Connection Cable (Wire)
JYJ150 150 150 ℃ Cross linked Polyolefin Insulated Motor Winding Connection Cable (Wire)
Usage characteristics: The AC rated voltage of the cable (wire) is 500V (only available for JYJ150 cable), 1000V, and 3000V; The maximum temperature of the continuous running conductor of JYJ 125 cable (wire) is 125 ℃, and the maximum temperature of the continuous running conductor of JYJ 150 cable (wire) is 150 ℃; The allowable bending radius for cable (wire) laying should not be less than 4 times the outer diameter of the cable (wire).
JB/T 6213.1-6213.6 is a series of standards for motor lead wires, which specifies specialized lead wire standards and specific requirements for different motors and working conditions. Motor manufacturers should choose and use them correctly according to the actual situation of the motor to prevent quality problems caused by improper selection and use of lead wires. JB/T 6213.1 is a general requirement for cables used in motors, while others are special requirements for different insulation levels or operating conditions.
