Hv Vacuum Circuit Breaker for Harsh Environments, Stable Performance

Product Description

ZN63A(VS1)-12 Indoor High Voltage Vacuum Circuit Breaker

The ZN63A(VS1)-12 Indoor High Voltage Vacuum Circuit Breaker is a three-phase AC 50Hz switchgear with a rated voltage of 12kV, designed for indoor power systems. It serves as protection and control unit for power grid equipment and industrial/mining enterprise electrical facilities. This breaker is suitable for applications requiring frequent operation under rated current or interruption of short-circuit currents.

It features an integrated design of the operating mechanism and breaker body, allowing for fixed installation or use with a dedicated push-in mechanism to form a draw-out unit.

Applications

Fixed Switchgear Panels: Primarily designed for integration into fixed-type metal-clad switchgear cabinets.
Industrial Power Systems: Ideal for protecting and controlling electrical circuits in manufacturing plants, processing facilities, and other industrial environments, especially where frequent load switching is required.
Infrastructure & Utility Projects: Suitable for power distribution in commercial buildings, hospitals, airports, and other critical infrastructure.
Ring Main Units (RMUs): Commonly used in ring network power supply systems for reliable grid power distribution and isolation.
Compact Substations: A key component in compact (box-type) substations for space-efficient power transformation and distribution.
Custom Power Systems: Can be configured for various non-standard and specialized power supply applications.

Construction & Infrastructure: Large commercial buildings, hospitals, airports, data centers.
Transportation: Railway electrification systems.

Normal Service Conditions

Ambient Temperature: Not higher than +40°C, not lower than -15°C (storage and transport not permitted below -30°C);
Altitude: Not more than 1000m;
Relative Humidity: Daily average ≤95%, monthly average ≤90%;
Saturated Vapor Pressure: Average ≤2.2×10^-³MPa (monthly average ≤1.8×10^-³MPa);
Seismic Intensity: Not more than 8 degrees;
Installation Location: Free from fire, explosion, severe pollution, chemical corrosion, and excessive vibration.

Specification

Technical Specifications

(Custom configurations available upon request.)

Project		Unit	Parameter
Rated voltage		kV	12
Rated insulation level	Rated lightning impulse withstand voltage (peak)	kV	75
	1min power frequency withstand voltage	kV	42
Rated short-circuit breaking current		kA	20 / 25	31.5	40
Rated current		A	630, 1250	630, 1250, 1600, 2000, 2500, 3150	1250, 1600, 2000, 2500, 3150
Rated short-time withstand current (RMS)		kA	20 / 25	31.5	40
Rated peak withstand current		kA	63	80	100
Rated short-circuit making current (peak)		kA	63	80	100
Rated number of operations at rated short-circuit breaking current		times	50
Power frequency withstand voltage (1min) for secondary circuit		V	2000
Rated operating sequence			O - 0.3s - CO - 180s - CO
			O - 180s - CO - 180s - CO
Rated short-circuit current duration		s	4
Rated capacitor bank breaking current (single/back-to-back)		A	630 / 400	800 / 400 (for 40kA model)
Mechanical life		times	10000

After Sales Service

Standard Warranty: 12 months
Extended Warranty: Optional coverage up to 36 months.
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

Company Profile

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FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.