ATO star delta starter consists of 3 contactors and an air delay head. Left contactor is connected to main circuit inlet and outlet and the main contactor of the thermal overload relay. The others are conversion contactors.

Star Delta Starter Specification

• Model: CHN-QJX2-12
• Rated Operational Current (AC-3): 12A
• Coil Rated Voltage: 220V AC, 380V AC (Optional)
• Contact Form: 3P+NO or 3P+NC (Optional)
• Power of Controllable 3-phase Squirrel-cage Motor (AC-3): 220V, 5.5kW; 380V, 10kW
• Conventional Heating Current: 20A
• Rated Insulation Voltage: 690V
• Electric Life: 1200 times/h
• Mechanical Life: 3600 times/h
• Matching Fusing Model: RT16-20
• Average Power Consumption (20℃) @ 50Hz: Pick-up 76VA; Holding 9.4VA
• Rail Size: 35mm
• Ambient Temperature: -5℃~+40℃
• Altitude: ≤2000m
• Class of Pollution: Class 3
• Installation Category: Ⅲ
• Dimension (L*W*H): 124mm*140mm*149mm
• Weight: 1kg

Air Delay Head Specification

• Rated Current: 10A
• Delay Time: Power Off Time Delay 0.1~30s
• Dimension (L*W*H): 50mm*45mm*60mm
• Auxiliary Contact: 1NO+1NC

Dimension (Unit: mm)

Wiring Diagram

Tips: Star delta starter environmental conditions

The star-delta starter is used for AC 50Hz or 60Hz, in the circuit with rated working current up to 95A. It is equipped with an air delay head, which can automatically perform star-delta conversion to reduce the starting current of the motor.

Environmental conditions:

• The altitude of the installation site should not exceed 2000m.
• Ambient air temperature: -5°C～40°C, the average value of 24 hours does not exceed 35°C.
• The relative humidity of the atmosphere should not exceed 50% when the ambient air temperature is 40°C.
• Higher relative humidity is allowed at lower temperature.
• The installation category is: Class III.
• Pollution level: Level 3.
• The inclination to the vertical plane should not exceed ±5°.
• It should be installed and used in a place without significant shaking, shock and vibration.