JRS2 Thermal Overload Relay is suitable for power system with AC 50Hz, rated working voltage of main circuit up to 690V, current up to 630A, for overload and phase-failure protection of three-phase AC asynchronous motor. Products meet the GB14048.4 standard.

Ambient temperature: The average value does not exceed +35°C in 24 hours.
Altitude: no more than 2000m.
Atmospheric conditions: The relative humidity does not exceed 50% at +40°C, and higher relative humidity may be allowed at lower temperatures. For example, 90% at 20°C, special measures should be taken for the occasional condensation due to temperature changes.
Pollution level: 3 levels.
Installation category: Class III.
Installation conditions: The inclination of the installation face and the vertical is not more than ±5°.
In addition to mounting screws, the relay can also use 35mm standard rail.
Shock vibration: The relay should be installed and used in places where there is no significant shaking, shock and vibration.
Transportation, Storage: The relay should not be subject to severe impact and vibration during transportation, and it must not be affected by rain or snow in transportation and storage. Relays are suitable for transport and storage at -25°C ~ +55°C, and at +70°C for short periods (in 24h).

Internal structure: insert combined type or independent type, independent type can be derived to independent type; with differential phase-failure protection and temperature compensation device; insert combination can prevent finger electric shock.
Installation operation: Z-combination type can be directly inserted into the AC contactor, F-independent type can be installed separately or installed on the rail; normally closed and normally open auxiliary contacts are insulated and separated; setting current is continuously adjustable; with auto or manual reset button; with test buttons and tripping instructions.

Rated current and setting current range of thermoelement

Action time of JRS2 series relay when three-pole circuit load is balanced.
Phase failure performance.
The manual reset time of the thermal relay should not exceed 2min, and the auto reset time should not exceed 5min.

Basic parameters of the auxiliary circuit