Product Overview
The ZKY3-630/1.14(0.66)-15 Low Voltage Vacuum Circuit Breaker is a 630 A three-pole breaker for 660 V and 1140 V AC systems. It uses vacuum arc extinction and a permanent-magnetic operating mechanism to control feeder circuits and high-capacity motors.
The breaker is used as the switching core of mine flameproof low-voltage feeder switches, mobile substations and industrial distribution equipment requiring a 15 kA short-circuit breaking level.
Technical Specifications
|
Parameter |
Specification |
|
Model |
ZKY3-630/1.14(0.66)-15 |
|
Rated operational voltage |
660 V / 1140 V AC |
|
Rated current |
630 A |
|
Rated frequency |
50 Hz |
|
Rated short-circuit breaking current |
15 kA |
|
Number of poles |
3 |
|
Arc-extinguishing medium |
Vacuum |
|
Operating mechanism |
Permanent-magnetic mechanism |
|
Referenced standards |
GB 14048.1, GB 14048.2, GB 8286, MT 871 and MT 829 |
|
Patent |
ZL200920304454.2 |
Core Advantages
630 A current path for mine feeder and motor circuits
The breaker carries 630 A continuously in 660 V or 1140 V equipment. In large motor starters and mine feeder switches, the main conductive path is matched to the actual feeder current instead of using a lower-frame breaker near its limit.
15 kA short-circuit interruption in a vacuum chamber
When a downstream cable or motor circuit develops a short circuit, the 15 kA rated interrupter opens the fault inside the sealed vacuum chamber. The arc does not rely on oil or compressed gas inside the feeder cabinet.
Permanent-magnetic operation for repeated switching
The actuator holds the open and closed positions through the permanent-magnetic mechanism. During repeated motor starting and feeder operation, the mechanism avoids the multiple springs and link adjustments used in traditional electromagnetic designs.
Customization Capabilities
- 660 V or 1140 V equipment configuration.
- Main-terminal orientation, mounting dimensions and conductive connection size.
- Closing, opening, undervoltage and auxiliary-contact circuit arrangement.
- Operating-mechanism interface and installation frame.
- Integration dimensions for mine feeder switches and mobile substations.
Quality Control
Model-specific component control
The 630 A conductive parts, 15 kA vacuum interrupter, permanent-magnetic mechanism and insulation components are checked against the ZKY3 model before assembly.
Functional operation checks
Electric closing, electric opening, undervoltage release, manual trip and mechanism movement are tested after assembly. Terminal alignment and mounting dimensions are also confirmed.
Pre-packing inspection
Every breaker is checked for model marking, external condition, operating function and order configuration before packing. Third-party inspection is accepted.
Why Choose Us
Patented ZKY3 breaker structure
The product is covered by Chinese patent ZL200920304454.2 and combines the vacuum interrupter with a permanent-magnetic operating mechanism.
Vacuum interrupter and breaker assembly in one production system
Wanping manufactures sealed vacuum switching components and assembles complete circuit breakers with the matched mechanism, terminals and support structure.
One-piece order and sample verification
The MOQ starts from one piece, allowing maintenance teams and equipment manufacturers to verify the breaker in the intended feeder switch before repeat orders.
FAQ
Q: What is the MOQ for the ZKY3-630 breaker?
A: The MOQ starts from one piece.
Q: How is the breaker packed for export?
A: The mechanism is secured in the open position, terminals are protected from impact and the breaker is packed in an export wooden case.
Q: Can the breaker be used in a 380 V system?
A: The product is designed around 660 V and 1140 V equipment. A different low-voltage breaker model must be selected for a 380 V system.
Q: Does the breaker include the complete mine flameproof cabinet?
A: No. The ZKY3-630 is the internal breaker assembly used inside a mine flameproof feeder switch or mobile-substation low-voltage compartment.
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