Relé Térmico de Sobrecarga JR28-25(LR2-D13)9-13A - KAYAMA

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 9 to 13 A, and it should be selected and adjusted primarily according to the rated current shown on the motor nameplate.

Technical Characteristics

• Brand: Kayama
• Model: JR28-25
• Reference: LR2-D13
• Type: Thermal overload relay
• Adjustable current range: 9 to 13 A
• Application: motor protection against prolonged overload
• Reset: manual and automatic
• Mounting: contactor coupling or DIN rail installation 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 is designed to detect conditions where motor current remains above the adjusted value for a sufficient period.

When the overload persists, the thermal mechanism can act on the motor control circuit.

Adjustable 9–13 A Range

Selection should primarily be based on the actual motor rated current.

Motor horsepower or kW alone should not be used as the only selection criterion.

Thermal Operating Principle

The relay uses the thermal effect associated with current flow to detect prolonged overload conditions.

Manual and Automatic Reset

The available product information states manual and automatic reset capability.

Automatic reset should only be used where the control system prevents hazardous unexpected restarting.

Short-Circuit Protection

The JR28-25 does not replace short-circuit protection.

Suitable circuit breakers, fuses or other coordinated protective devices remain necessary.

Trip Class

The expression “industrial standard” does not technically define the trip class.

A specific trip class should not be assigned without official technical documentation.

Contactor Compatibility

Compatibility must be confirmed according to terminal geometry, pole spacing, coupling system, dimensions and electrical characteristics.

Dimensions

Approximate stated dimensions:

• Height: 75 mm
• Width: 45 mm
• Depth: 70 mm
• Weight: approximately 200 g

Material

The enclosure is stated to be made of thermoplastic.

Specific polymer and flammability classifications were not confirmed.

Installation and Safety

Installation should be performed by qualified personnel.

Before energizing, verify motor rated current, relay adjustment, contactor compatibility, short-circuit protection and wiring.

Registration Information

• Brand: Kayama
• Model: JR28-25
• Reference: LR2-D13
• Current range: 9–13 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 9–13 A Thermal Overload Relay is part of Kayama's professional range for electric motor control and protection.