ATO 3 pole AC magnetic contactor is used in 3 phase units. This contactor relay works between power source and high load electrical motor to balance changes in electrical frequency which may come from a power supply.
Specification
Model | CHN-CJX2-F185 |
Rated Current | le max AC-3 (Ue≤440V) | 185A |
le max AC-1 (θ≤40°C) | 275A |
Coil Rated Voltage (Optional) | 24V AC, 36V AC, 48V AC, 110V AC, 220V AC, 380V AC |
Contact Form | 3NO |
Auxiliary Contact (Optional) | 2NO, 2NC, 1NO+1NC, 2NO+2NC, 1NC+3NO, 4NO, 4NC |
Frequency | 50Hz/ 60Hz |
Rated Insulated Voltage (Ui) | 1000V |
Rated Impulse Withstand Voltage (Uimp) | 8kV |
Rated Operational Voltage | 1000V |
Conventional Thermal Current (θ≤40°C) | 275A |
Operation Frequency | AC-1, AC-2, AC-3 | 1200 times/h |
AC-4 | 300A |
Rated Power (AC-3) | 220/240V | 55kW |
380/400V | 90kW |
415V | 100kW |
440V | 100kW |
500V | 110kW |
660/690V | 110kW |
1000V | 100kW |
Connection/ Wiring | Number of Lines | 2 |
Line Size | 25x3mm2 |
Cable with Splicing | 150mm2 |
Cable with Connector | 150mm2 |
Screw Diameter | φ8 |
Tightening Torque | 18N.m |
Standards-Compliant | IEC60947-4-1, GB14048.4, EN60947-4-1 |
Dimensions | 174 x 168.5 x 181mm |
Weight | 9.5kg |
Tips: Reasons for poor contact of the AC magnetic contactor
Poor contact of the AC contactor will increase the contact resistance between the moving and static contacts, resulting in excessively high temperature of the contact surface, and causing the surface contact to become a point contact, or even non-conduction. The reasons for this failure are:
- There are oil stains, flower hairs, and foreign objects on the contacts.
- Because of long-term use, the surface of the contact is oxidized.
- Defects, burrs or metal swarf particles caused by arc ablation.
- There is jamming in the moving part.
Low price 3 phase 3 pole AC magnetic contactor is used in electric motor control and DIN rail or panel mounting, with 24V/110V/220V coils. Different contact form are available, intended for frequently switching on and off 3 phase loads up to 185 amps.