#RHN热继电器

RHN thermal relays are electrical devices designed to control circuits by responding to changes in the state of thermal components. They generally consist of thermal elements, an electromagnetic system, and contact systems. The primary function of RHN thermal relays is to protect and regulate circuits, finding extensive applications across various electrical equipment.

1. Introduction to RHN Thermal Relays
   The RHN thermal relay is a responsive relay manufactured by Schneider Electric, a French company. It operates based on the load current of the connected circuit, self-heating within a defined time frame. This heating causes the bending of the bimetallic strip in the electromagnetic system, facilitating the movement of contacts to perform circuit switching.

2. Characteristics of RHN Thermal Relays
   Key features of RHN thermal relays include high sensitivity to promptly respond to circuit overloads or short circuits, high reliability due to simple internal construction resulting in low failure rates, convenient installation owing to its compact size and lightweight, and a long lifespan because the heating element is made from nanomaterials, offering stability and durability.

3. Conditions for Using RHN Thermal Relays
   RHN thermal relays have specific usage conditions and requirements. They operate within a voltage range of 220V to 660V (50/60Hz), a load current range from 0.1A to 630A, in an ambient temperature of -5℃ to +40℃, with a relative humidity not exceeding 50%. However, the humidity can reach 90% at the highest temperature of 40°C, and they're suitable for use at altitudes not exceeding 2000 meters.