FZN21-12D/T630A Indoor High Voltage Vacuum Load Break Switch

Product Video

Watch our video to get a comprehensive view of the FZN21-12D series, including its appearance, internal structure, and operational details.

Product Overview

[Key Advantages]

High Reliability: Employs mature vacuum arc-extinguishing technology to ensure stable, long-term operation in demanding environments.
Extended Service Life: Mechanical and electrical life cycles exceed industry standards, significantly reducing maintenance costs.
Compact Design: The compact structure and small footprint allow for easy integration into various types of switchgear.
Low Maintenance: Requires no complex routine maintenance, with simple daily inspections, saving time and labor.

[Applications]

The FZN21-12D/T630A series indoor high-voltage vacuum load break switch is suitable for 12kV, 50Hz power systems. It is designed to safely close, carry, and break rated working currents and overload currents. This product is an ideal control and protection component for switchgear in ring main units, prefabricated substations, industrial power distribution rooms, and commercial buildings.

FZN21-12D/T630A Indoor High Voltage Vacuum Load Break Switch

Technical & Professional Details

Technical Specifications

Parameter	Unit	FZN21-12D/T630A
Rated Voltage (Ur)	kV	12
Rated Current (Ir)	A	630
Rated Frequency (Fr)	Hz	50
Rated Short-Time Withstand Current (Ik)	kA	20
Rated Peak Withstand Current (Ip)	kA	50
Rated Active Load Breaking Current	A	630
Mechanical Life	Cycles	≥10000
Power Frequency Withstand Voltage (1min)	kV	42
Lightning Impulse Withstand Voltage	kV	75
Protection Class	-	IP3X

FZN21-12D/T630A Indoor High Voltage Vacuum Load Break Switch

Structure and Operating Principles

The product consists of key components, including the frame, disconnect switch, vacuum interrupter, and earthing switch.

Vacuum Interrupter: We use a high-quality vacuum interrupter as the arc-extinguishing and breaking element. When the contacts separate in a vacuum, the arc is extinguished rapidly, effectively preventing restrikes and ensuring safe, reliable operation.

Operating Mechanism: An advanced spring energy storage mechanism ensures fast and synchronized closing and opening operations, which extend the product's life and enhance operational reliability.

Trust & Brand Strength

Customer Case Studies

Texas Wind Farm Project, USA

Client: A major energy corporation in Texas.
Project Challenge: The client required a load break switch that could operate reliably in environments with extreme temperatures and frequent switching.
Our Solution: Our FZN21-12D product met the client's stringent requirements with its high thermal resistance and extended mechanical life, ensuring grid stability.

Munich Industrial Park Power Distribution Project, Germany

Client: A well-known German engineering and construction company.
Project Challenge: The client had strict requirements for equipment size and integration, needing a compact and easy-to-install load break switch.
Our Solution: The FZN21-12D, with its modular and compact design, was a perfect fit for the client's switchgear, significantly reducing installation time and earning high praise.

Authoritative Certifications

We adhere to strict international quality standards to ensure the superior performance of every product. This product has passed multiple authoritative certifications:

ISO 9001 Quality Management System Certification
CE European Safety Certification
China Quality Certification Center (CQC) Certification

FZN21-12D/T630A Indoor High Voltage Vacuum Load Break Switch

Purchase & Support

Frequently Asked Questions (FAQ)

Q: Does this product require regular maintenance?A: The FZN21-12D series load break switch features a maintenance-free design. In normal operating environments, you only need to perform routine external inspections and cleaning.

Q: What is the difference between the FZN21-12D and a vacuum circuit breaker?A: A load break switch is primarily used for closing and breaking normal working currents and overload currents. A vacuum circuit breaker has these functions but can also safely interrupt short-circuit fault currents, making it typically used in applications requiring a higher level of protection.