Ckj3-800A/1140V Low Voltage AC Vacuum Contactor for Mining and Metallurgy

• Customization: Available
• Electricity Type: Vacuum
• Number of Pole: 3
• Model NO.: CKJ3-1140/800
• Phase: 3
• Main Circuit Rating Voltage: 1140V
• Main Circuit Rating Current: 800A
• Type: Ac Contactors
• Feature: Practical and Durable
• Control Voltage: 110V/220V/380V
• Mechanical Life: 2000000times
• OEM: Accept
• Transport Package: Carton and Pallet
• Specification: as specification
• Trademark: Liyond
• Origin: Wenzhou China

Product Description

CKJ3-800A/1140V Low Voltage AC Vacuum Contactor for Mining and Metallurgy

General description

CKJ3 series belongs to high current series, applicable to AC 50Hz-60Hz, rated voltage up to 1140V, upper limit up to 2kV, rated current up to 800-1000-1250A control circuit. It is used for connecting and breaking circuits at a distance and frequently starting AC motors.

The product adopts ceramic vacuum switching tube, the tube with high vacuum as a medium, thus, its small size, high voltage, strong breaking capacity, long service life, contact without maintenance, especially because the arc is not exposed, safe and reliable advantages, for coal, electric power, chemical industry, metallurgy, petroleum and other industrial sectors are widely used.

Product features:
1.High Switching Frequency: Engineered for heavy-duty industrial applications requiring frequent start-stop cycles, with a mechanical life exceeding 1,000,000 operations.
2.Reliable Arc Quenching: Equipped with high-performance ceramic vacuum interrupters to ensure rapid arc extinction and minimal contact wear.
3.Optimized for 1140V Systems: Specifically designed for the demanding electrical environments of coal mines, oil fields, and steel plants.
4.Compact & Modular Design: Features a robust frame with standardized mounting dimensions, making it an ideal cost-effective alternative for medium-to-high current control systems.
5.Enhanced Safety: Provides superior insulation performance and arc-over protection, ensuring stability in harsh industrial conditions.

Technical parameters

 

Model	Unit	Data
Rated Working Voltage	V	1140
Rated working current	A	800, 1000, 1250
Rated frequency	Hz	50~60
Rated connecting capacity	A	4Ie (AC-2)
Rated breaking capacity	A	4Ie (AC-2)
Overload current withstand capacity	A/s	4Ie/10
Frequency withstand voltage phase-to-phase and phase-to-ground	KV	4.2
Industrial Frequency Tolerance VoltageVacuum Break	KV	10
Lightning impulse withstand voltage	KV	8
Rated Voltage	V	AC 220/380 DC 110/220
Rated Power Maintenance	VA	≤1000/100 (Pull in/hold)
Rated power mechanical holding	VA	≤900/600 (opening/closing)
Form		3a+ab
Rated value		AC380V/5A DC380V/1A
Control circuit, auxiliary circuit to ground frequency withstand voltage	KV	2
Rated operating frequency long-term or mechanical retention type	times/h	300
Rated operating frequency short-term	times/h	600
Mechanical life	times	100
Electrical life	times	25(AC-2)
Closing time	ms	≤200
Fixed switching time	ms	≤160(electric hold)≤160(mechanical hold)
3-phase non-simultaneous	ms	≤3
Closing bounce	ms	≤10

Working conditions

1. Suitable for indoor and outdoor;
2. Ambient temperature -40°C~+40°C;
3. The altitude does not exceed 3000m (the porcelain sleeve type does not exceed 1000m);
4. The power frequency is not less than 48Hz and not more than 62Hz;
5. The power frequency voltage applied between the terminals of the 1140V low-voltage vacuum contactor for a long time shall not exceed the continuous operating power of the 1140V low-voltage vacuum contactor;
6. Areas with an earthquake intensity of 8 degrees or below;
7. The wind speed does not exceed 35m/s;

FAQ