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Durable JR28 3-phase thermal overload relay with 9A-95A adjustable current range, designed for long distance motor control and reliable overload protection. Flexible mounting, low maintenance, heavy-duty industrial build.
Durable JR28 3-phase thermal overload relay with 9A-95A adjustable current range, designed for long distance motor control and reliable overload protection. Flexible mounting, low maintenance, heavy-duty industrial build.
The manufacturer JR28 thermal overload relay is a high-end industrial grade accessory designed for efficient remote motor control and comprehensive motor thermal overload protection, meeting the stringent requirements of modern industrial automation and power distribution systems. This relay can provide stable performance in various industrial scenarios, effectively eliminating frequent maintenance needs and reducing the downtime of industrial facilities.
Key Features：
Wide Adjustable Current Range: Covers 9A to 95A, compatible with various industrial motors and electrical loads, reducing the need for multiple relay models and simplifying inventory management.
Flexible Mounting Choices: Supports both screw mounting and DIN rail installation, allowing fast, flexible setup in different control cabinets and industrial systems, perfect for new assembly and retrofitting projects.
Stable 3-Phase Design: Standard 3-phase structure delivers balanced power distribution, effective phase loss protection and reliable overload tripping.
Heavy-Duty Robust Build: Engineered with a durable, impact-resistant housing and high-performance internal contacts, delivering dependable long-distance control and switching functionality.
Applications:
Industrial Motor Control Systems
Long Distance Remote Control Panels
Manufacturing & Production Equipment
| Model | Current Adjus- tment Range |
Control Power(kW) | Pluggable Contactor | Short Circuit Protection Fusegreed Heating Current |
|||||
| 220V | 380V | 415V | 440V | 660V | aM | gG | |||
| JR28-09301d | 0.1~0.16 | CJX2-09~25 | 0.25 | 2 | |||||
| JR28-09302d | 0.16~0.25 | CJX2-09~25 | 0.5 | 2 | |||||
| JR28-09303d | 0.25~0.40 | CJX2-09~25 | 1 | 2 | |||||
| JR28-09304d | 0.40~0.63 | 0.37 | CJX2-09~25 | 1 | 2 | ||||
| JR28-09305d | 0.63~1 | 0.55 | CJX2-09~25 | 2 | 4 | ||||
| JR28-09306d | 1~1.6 | 0.37 | 0.55 | 0.75 | CJX2-09~25 | 2 | 4 | ||
| JR28-09307d | 1.6~2.5 | 0.37 | 0.55 | 0.75 | 1.1 | 1.5 | CJX2-09~25 | 4 | 6 |
| JR28-09308d | 2.5~4 | 0.75 | 1.1 | 1.5 | 2.2 | 3 | CJX2-09~25 | 6 | 10 |
| JR28-09310d | 4~6 | 1.1 | 2.2 | 2.2 | 2.2 | 4 | CJX2-09~25 | 8 | 16 |
| JR28-09312d | 5.5~8 | 1.5 | 3 | 3.7 | 3.7 | 5.5 | CJX2-09~25 | 12 | 20 |
| JR28-09314d | 7~10 | 2.2 | 4 | 4 | 4 | 7.5 | CJX2-09~25 | 12 | 20 |
| JR28-12316d | 9~13 | 3 | 5.5 | 5.5 | 5.5 | 10 | CJX2-09~25 | 16 | 25 |
| JR28-18321d | 12~18 | 4 | 7.5 | 9 | 9 | 15 | CJX2-09~25 | 20 | 35 |
| JR28-25322d | 17~25 | 5.5 | 11 | 11 | 11 | 18.5 | CJX2-09~25 | 25 | 50 |
| JR28-32353d | 23~32 | 7.5 | 15 | 15 | 15 | 22 | CJX2-32 | 40 | 63 |
| JR28-32355d | 28~36 | 10 | 18.5 | 22 | 22 | 30 | CJX2-32 | 40 | 80 |
| JR28-40353d | 23~32 | 7.5 | 15 | 15 | 15 | 22 | CJX2-40~80 | 40 | 63 |
| JR28-40355d | 30~40 | 10 | 18.5 | 22 | 22 | 30 | CJX2-40~80 | 40 | 80 |
| JR28-50357d | 37~50 | 11 | 22 | 25 | 25 | 37 | CJX2-40~80 | 63 | 100 |
| JR28-65359d | 48~65 | 15 | 25 | 30 | 30 | 45 | CJX2-40~80 | 63 | 100 |
| JR28-65361d | 55~70 | 18.5 | 30 | 37 | 37 | 55 | CJX2-40~80 | 80 | 125 |
| JR28-80363d | 63~80 | 22 | 37 | 45 | 45 | 75 | CJX2-40~80 | 80 | 125 |
| JR28-140365d | 80~104 | 30 | 45 | 55 | 55 | 75 | CJX2-115~170 | 125 | 200 |
| JR28-140367d | 95~120 | 30 | 55 | 75 | 75 | 90 | CJX2-115~170 | 125 | 224 |
| JR28-140369d | 110~140 | 37 | 63 | 75 | 75 | 110 | CJX2-115~170 | 160 | 250 |
| Selling Units | Single item |
| Quantity (pieces) | 1 – 100 | > 100 |
| Lead time (days) | 15 | To be negotiated |
| Theory | AC |
| Power Source | 50 Hz, 60 Hz |
| Terminal Shape | Screw or rail installation |
| Contact Material | CJX2 |
| Place of Origin | Zhejiang, China |
| Rated Current | 0.1-140A |
| Size | Miniature |
| Contact Load | Low Power |
| Model Number | JR28 |
| Brand Name | Westhomes |
The Westhomes JR28 Thermal Overload Relay is a motor protection device designed to protect AC motors from overload, phase failure, and excessive current conditions. It is commonly used with contactors to provide reliable overload protection in industrial motor control systems.
The main function of the JR28 Thermal Overload Relay is to monitor motor current and disconnect the control circuit when an overload condition occurs. It helps prevent motor overheating, insulation damage, and premature motor failure.
The JR28 works by using thermal elements to detect prolonged overcurrent conditions. When the motor current exceeds the preset value for a certain period, the relay trips and interrupts the control circuit to protect the motor.
The JR28 provides thermal overload protection and phase failure protection. It helps protect motors from damage caused by continuous overload operation and abnormal power supply conditions.
The JR28 is suitable for industrial motor applications such as pumps, fans, compressors, conveyors, machine tools, and other motor-driven equipment. It is widely used in motor control panels and low-voltage electrical systems.
The JR28 Thermal Overload Relay mainly provides overload and phase failure protection and is normally installed with an AC contactor. An MPCB combines overload protection, short-circuit protection, and manual switching functions in one device.
No. The JR28 is designed for overload and phase failure protection only. Additional protective devices such as fuses, MCBs, or MCCBs are required to provide short-circuit protection.
Yes. The JR28 Thermal Overload Relay is designed to be used together with an AC contactor to create a complete motor starter solution. This combination provides motor switching control and overload protection.
The correct JR28 model should be selected according to the motor’s rated current, operating voltage, power rating, and application conditions. The overload setting should match the motor’s full-load current to ensure effective protection.
The Westhomes JR28 provides reliable motor overload protection, stable operating performance, and easy integration with motor control systems. It is an effective solution for improving motor safety, reducing downtime, and extending equipment service life.
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