Thermal protection relay JR20

1 NCthree-phaseAC

JR20 series thermal over-load relay is suitable for the power system of AC 50Hz/60Hz, rated operating voltage Ue: 660V, current 0.1～630A, as the use of over-load and break phase protection for AC motor. Thermal relay has the functions of break phase protection, temperature compensation, optional selection of manual reset and auto-reset, the check of action releasing flexibility, and manually break NC contacts, etc. This product confirms to: GB14048.4, IEC60947-4-1 etc. standards. Normal operating condition and installation condition 3.1 - Ambient temperature: -5°C~+40°C, and the average value within 24h does not exceed +35”C ; 3.2 - Altitude of the installation place does not exceed 2000m; 3.3 - Atmosphère condition: The relative humidity does not exceed 50% when it is at +40°C, it allowed relatively high humidity at the relatively low temperature, for example, the relative humidity reaches 90% when +20”C, and it should take spécial measurements when there produced the condensation on the product due to the temperature variation. 3.4 - It should be at the no explosion danger medium, and the medium without the gas that cannot corrode the métal and damage the insulation as well as the places that without conductive dust. 3.5 - Grade of pollution: 3 3.6 - Installation category: III 3.7 - Installation position: installed at the normal position, the gradient between the installation side and the vertical side does not exceed ±5°, and without obvious vibration and impact. 3.8 - Protection grade: IP 00