Product Overview
Compact Indoor Vacuum Load Switch from a Reliable Manufacturer and Factory Supplier
The FZN25/FZRN25 indoor vacuum load break switch is a small three-pole device designed for the 12kV and 24kV distribution systems that combines the capability to switch loads with vacuum arc quenching performance. It is widely used in ring main units, switchgears, and OEM assemblies, and it is always available for orders from our factory.
Applications & circuit protection
The FZN25/FZRN25 is employed in scenarios where circuits in indoor installations can safely switch under load.
- In ring main units, load switching with configurations is utilized.
- In switchgear panels, feeder and transformer switching is done.
- In industrial distribution, indoor MV circuit control takes place.
- In OEM assemblies, use in enclosed switchgear is implemented.
Construction & operating reliability
The load switch employs a vacuum interrupter along with spring actuation mechanism which yields reliable switching performance and unambiguous indication of contacts.
- Vacuum interrupter provides clean cutting of arc.
- Spring actuating mechanism ensures manual and motorized options to use.
- Compact three-position design for indoor application.
- Short-time capacity is 20kA/25kA for 4 seconds.
- Mechanical endurance of 5,000-10,000 cycles.
Technical Parameter
| Parameter | Value |
| Rated voltage | 10 kV (12 kV max) |
| Rated frequency | 50 Hz |
| Rated current | 630 A |
| Rated breaking load current | 630 A |
| Thermal stable current | 20 kA / 2 s (load switch) · 20 kA / 4 s (vacuum switch) |
| Dynamic stable current | 50 kA |
| Full-load breaking operations | 20 (load switch) / 10000 (vacuum switch) |
| Mechanical life | 2000 (load switch) / 10000 (vacuum switch) |
| 1-min power frequency withstand voltage | 42 kV |
| Lightning impulse withstand voltage | 75 kV |
| Power-frequency withstand (1 min) | 42/48 kV (12kV); 50/65 kV (24kV) |
| Lightning impulse withstand | 75/85 kV (12kV); 95/125 kV (24kV) |
| Short-time withstand current (4s) | 20 / 25 kA |
| Peak withstand current | 50 / 63 kA |
| Standard | IEC 62271 / GB 3804 |
Circuit Breaker Price & Factory Quote
The pricing parameters for breakers are determined by the rated voltage, current, breaking capacity, method of operation, and quantity. As manufacturers, we supply Indoor Vacuum Load Switch at factory prices with discounts for bulk or batch deliveries.
- Factory priced standard products models
- Over and above pricing for unique mechanistic functioning and CTs
- Pricing based on container capacity
Breaker Wiring & Control Connection
The components of power are interconnected with the breaker through power terminals, while other terminals receive signals to switch on or off and used for auxiliary transactions. The diagrams for installation and terminal signs are provided with the Indoor Vacuum Load Switch.
- Power terminals are marked according to a schematic.
- The control wiring is cable-connected and checked.
- Auxiliary contacts can be used for signaling.
Compare Breaker Options
Select the right breaker for your duty:
| Feature | This Breaker | Alternative |
| Voltage | As specified | Other classes available |
| Breaking | Per model | Higher breaking on request |
| Mechanism | Spring / magnetic per model | Manual or motor operation |
| Mounting | Indoor / outdoor per model | Pole or panel mounting |
Export Markets & Country Compatibility
The Indoor Vacuum Load Switch is marketed to the power industry and distributors in Southeast Asia, Middle East, Africa, Latin America and South Asia. Technical characteristics and certificates correspond to the market in question.
Breaker Dimensions, Weight & Packing
The size and weight of the circuit breakers depend on the voltage class and the type of operation. Outdoor pole-mounted circuit breakers have a small size and low weight to facilitate convenient installation, while the indoor equipment is shipped already fully equipped for panel fixing. The exact dimensions and weight are given in the order documentation.
- Dimensions of the model breaks
- Locks and poles secured for shipping
- All the necessary mounting hardware included
Standards & certifications
FZN25/FZRN25 is constructed to the standards set by IEC 62271 and GB 3804, and type-test documentation can be received for project approval.
- Operating standards: IEC 62271 / GB 3804
- Vacuum interruption technology.
- Insulation voltage level for 12kV and 24kV.
- Mechanical durability tested for typical applications.
OEM & B2B supply support
As a leading manufacturing company of power equipment, we, at Subian Electric, supply load switches to switchgear manufacturers, RMU integrators and middlemen with required samples and technical assistance.
Should you require special design or the needed scheme, please provide us with the specification and quantity.
- Samples are available for approval.
- We adapt to your needs regarding quantity of supplies for your projects and B2B purchases.
- We provide OEM/ODM services for RMU and switchgear integration.
- We produce custom marking and packaging of our products.
- We provide technical documentation and certification support.
Frequently Asked Questions
What is the FZN25/FZRN25 used for?
The FZN25/FZRN25 is used for switching load currents in indoor distribution networks with voltage levels of 12kV and 24kV and finds application in ring main units and switchgear panels.
What ratings are available?
The current ratings available for FZN25/FZRN25 are 630A and 1250A along with short time withstand current ratings of 20kA and 25kA.
Can it be motor operated?
Yes, the spring mechanism of FZN25/FZRN25 can be operated manually, or with the help of a motor.
Do you supply to switchgear manufacturers?
Yes, we supply our products to OEM switch gear and RMU manufacturers across the globe with customized support and documentation.
