JR36 Thermal Relay / Low-Voltage Primary Components

1. Product Overview

This product is a thermal overload protection assembly designed for AC motor control and low-voltage distribution systems. It integrates the JR36 thermal relay and other essential low-voltage primary components inside a control cabinet, motor control center or distribution box. The assembly is mainly used to protect motors and load circuits from overload, phase loss and unbalanced current conditions.

2. Core Components

• JR36 Thermal Relay

Provides overload protection for motors and low-voltage circuits by detecting current rise and triggering a trip signal.

• Current Adjustment Knob

Allows users to set the rated protection current according to the motor or load requirements.

• Scale Marking

Indicates the adjustable current range for easy setting and inspection.

• Auxiliary Contacts

Sends control signals or interlocks with contactors and control circuits when an overload condition occurs.

• Terminal Block

Provides reliable connection for main circuit and control circuit wiring.

• DIN Rail

Enables quick and standardized installation inside distribution boxes and control panels.

• Control Wiring

Connects the thermal relay to contactors, push buttons and protection circuits.

3. Key Features

• Motor overload protection
• Phase loss protection function
• Adjustable current setting
• Clear scale marking
• Reliable trip action
• Easy installation and wiring
• Compatible with AC contactors
• Suitable for motor control and distribution protection

4. Technical Specifications

5. Applications

• Motor control cabinets
• Distribution boxes
• Industrial control panels
• Motor control centers
• Conveyor systems
• Water pump control systems
• Fan and blower control systems
• Packaging machinery and production lines

6. Usage Environment

• Indoor installation
• Ambient temperature: -5°C to +40°C
• Altitude: ≤ 2000 m
• Relative humidity: ≤ 50% at 40°C, ≤ 90% at 20°C
• No corrosive gases, no conductive dust, no strong vibration
• Dry and well-ventilated environment

7. Packing & Delivery

• Standard export packaging with inner foam protection
• Suitable for sea freight, air freight and land transportation
• Custom neutral packaging available based on order quantity