Product
Relé Térmico de Sobrecarga JR28-25(LR2-D13)2,5-4A - KAYAMA
Kayama JR28-25 LR2-D13 Thermal Overload Relay with 2.5–4 A adjustable current range for motor protection
The Kayama JR28-25 LR2-D13 Thermal Overload Relay is designed to protect electric motors against prolonged overload conditions, with an adjustable current range of 2.5 to 4 A. It features manual and automatic reset, a thermoplastic enclosure, approximate dimensions of 75 × 45 × 70 mm and an approximate weight of 200 g.
- SKU
- 07130002
- Category
- Thermal
Talk to a specialist
Our team of consultants can help with specification and sizing.
Technical Description
The Kayama JR28-25 (LR2-D13) Thermal Overload Relay is designed to protect electric motors against prolonged overload conditions.
Its stated adjustable current range is 2.5 to 4 A and should be set according to the motor rated current when that current falls within the specified range.
Technical Characteristics
- Brand: Kayama
- Model: JR28-25
- Reference: LR2-D13
- Type: Thermal overload relay
- Adjustable current range: 2.5 to 4 A
- Application: motor protection against prolonged overload
- Operating principle: thermal
- Reset: manual and automatic
- Mounting: contactor coupling or DIN rail configuration depending on version/accessory
- Stated material: thermoplastic
- Approximate height: 75 mm
- Approximate width: 45 mm
- Approximate depth: 70 mm
- Approximate weight: 200 g
Overload Protection
The JR28-25 uses thermal elements to detect prolonged overload conditions.
When current remains above the adjusted value for sufficient time, the relay trips and changes the state of its auxiliary control contacts.
Adjustable 2.5–4 A Range
Selection should primarily be based on the motor rated current.
The relay should not be selected according to motor horsepower or kW alone.
Manual and Automatic Reset
The product information states manual and automatic reset capability.
Automatic reset should be used only where the electrical and safety logic prevents hazardous unexpected restarting.
Short-Circuit Protection
The thermal overload relay does not replace short-circuit protection.
Suitable circuit breakers, fuses or other devices remain necessary.
Trip Class
The exact trip class has not been confirmed.
A class such as 10A, 10, 20 or 30 should not be assigned without specific technical documentation.
Contactor Compatibility
Compatibility with contactors must be confirmed according to dimensions, terminal geometry, mounting system and electrical characteristics.
The LR2-D13 reference alone does not guarantee interchangeability between manufacturers.
Dimensions
Approximate stated dimensions:
- Height: 75 mm
- Width: 45 mm
- Depth: 70 mm
- Weight: approximately 200 g
Enclosure Material
The enclosure is stated to be made of thermoplastic.
Specific polymer type, flammability rating and thermal properties were not confirmed.
Installation and Safety
Installation must be performed by qualified personnel.
Before energizing, verify motor current, relay adjustment, contactor compatibility, protection against short circuits and control-circuit connections.
Registration Information
- Brand: Kayama
- Model: JR28-25
- Reference: LR2-D13
- Current range: 2.5–4 A
- Type: Thermal overload relay
- Reset: manual and automatic
- Material: thermoplastic
- Approximate dimensions: 75 × 45 × 70 mm
- Approximate weight: 200 g
Kayama Quality
The Kayama JR28-25 LR2-D13 2.5–4 A Thermal Overload Relay is part of Kayama's professional range for motor control and protection.
The Kayama JR28-25 LR2-D13 2.5–4 A Thermal Overload Relay can be used in motor control and protection systems where the motor rated current falls within its adjustment range.
- Electric motors — protection against prolonged overload conditions within the 2.5–4 A range.
- Pumps — can form part of motor protection in pumping systems.
- Fans — assists in protecting motors against persistent overcurrent.
- Exhaust systems — can act on the control circuit under overload conditions.
- Compressors — can be integrated into properly designed motor protection systems.
- Industrial machinery — can form part of machine motor protection circuits.
- Motorized systems — suitable for motors with rated current within 2.5–4 A.
- Control panels — can be integrated with compatible contactors and protection devices.
- Automated systems — can provide a trip condition to a control circuit or PLC.
- Motor starting assemblies — can be combined with short-circuit protection, contactor and motor.
Be the first to review this product.
