JR Series Wound Rotor Slip Ring Motor-PairBiz

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Specification

Application:

multiple industries
Material:

See product manual
published:

10 Oct 2026
Lead time:

within 30 days
category:

Pumps & Compressors
price type:

negotiable

description

Wound Rotor Slip Ring Motor

The JR series is a protected wound-rotor three-phase asynchronous motor designed for continuous duty (S1) with IC01 cooling. Built with a robust cast iron or welded steel plate housing, this slip ring motor delivers high starting torque at low starting current and offers adjustable speed within a defined range by inserting external resistance in the rotor circuit. The motor features a simple, reliable structure with easy installation and maintenance. The slip ring assembly is positioned at the non-drive end, while the drive end and non-drive end are equipped with air inlet and outlet vents for efficient cooling.

JR wound rotor slip ring motors are widely used as prime movers in machinery manufacturing, power plants, mining, metallurgy, and various industrial enterprises. They can drive equipment such as fans, compressors, pumps, crushers, ball mills, cutting machines, winches, hoists, and transport machinery.

Key Specifications:

Motor Type: Wound rotor slip ring three-phase asynchronous motor
Power Range: 80 kW – 850 kW
Rated Voltage: 380V / 415V / 660V / 690V / 3000V / 3300V / 6000V / 10000V
Number of Poles: 6 / 8 / 10 / 12
Rated Frequency: 50 Hz / 60 Hz
Protection Level: IP23
Cooling Method: IC01
Duty Type: S1 (continuous)
Insulation Class: Class B
Wiring Configuration: Delta (△)
Max. Torque / Rated Torque Ratio: ≥ 1.8 (at rated voltage)
Ambient Temperature: -15°C ~ +40°C
Altitude: Up to 1000 m
Installation Method: IMB3 (vertical installation available on request)

Technical Features:

High starting torque with low starting current — external rotor resistance provides maximum starting performance
Adjustable speed capability by varying rotor resistance (variable speed motor)
High overload capacity with smooth acceleration under heavy loads
No abnormal heating during starting
Cast iron or welded steel plate housing for high structural strength and durability
Simple structure, convenient installation and maintenance
Slip ring located at the non-drive end for easy access
Must be started with external starting resistor in the rotor circuit — direct short-circuiting of rotor windings is not permitted

Applications:

Fans and blowers
Compressors
Pumps
Crushers and ball mills
Cutting machines
Winches and hoists
Transport machinery
Elevators and lifting equipment
Printing presses
Mining and metallurgical equipment
Power generation facilities
General industrial drives requiring high starting torque or speed control

Company Profile:

ZCL Electric Motor Technology Co., Ltd. is a modern import and export enterprise specializing in electrical equipment, mechanical equipment, and automation control technology. Registered capital of RMB 3 million, the company is based in Shijiazhuang, Hebei Province, China — strategically located in North China with strong advantages in steel, chemical, building materials, and machinery processing industries.

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