Reliably Indoor High-Voltage Load Switch 12kV 15kV 17.5kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | Reliably Indoor High-Voltage Load Switch 12kV 15kV 17.5kV |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| Series | FKN12-12 |
Product descriptions from the supplier
Description
Product Overview
The FKN12-12 Indoor High-Voltage Load Switch and FKRN12-12D Fuse Combination are three-phase high-voltage switching devices designed for 12kV, 50Hz AC power systems. They are engineered to make and break load currents, loop currents, no-load transformer currents, and cable charging currents, and can close short-circuit currents.
The FKRN12-12D variant, integrated with a fuse, can interrupt short-circuit currents directly. When equipped with an earthing switch, the load switch can also withstand short-circuit currents, making it an ideal solution for load control and short-circuit protection in ring network or terminal power supply scenarios, such as district distribution stations and industrial power equipment.
Core Features
- Multi-Current Handling: Reliably switches load, loop, no-load transformer, and cable charging currents, with the ability to close short-circuit currents.
- Integrated Protection: The FKRN12-12D fuse combination enables direct interruption of short-circuit currents, providing comprehensive fault protection.
- Earthing Switch Compatibility: When fitted with an earthing switch, the unit can safely withstand short-circuit currents, enhancing maintenance safety.
- Compact Indoor Design: Optimized for installation in compact indoor spaces like distribution cabinets and ring network units, saving layout space.
- Flexible Operation: Manual operation mechanism with clear switching indication, ensuring safe and intuitive operation for maintenance personnel.
- Wide Compatibility: Suitable for ring network and terminal power supply systems, meeting the protection needs of urban and industrial distribution networks.
Technical Parameters
|
No.
|
Item
|
Unit
|
FKN12 - 12/630
|
FKRN12 - 12D/125 - 31.5
|
|---|---|---|---|---|
|
1
|
Rated Voltage
|
KV
|
12
|
|
|
2
|
Rated Frequency
|
Hz
|
50
|
|
|
3
|
Rated Current
|
A
|
630
|
125
|
|
4
|
Lightning Impulse Withstand Voltage
|
KV
|
For ground and phase to phase: 75, for isolating gap: 85
|
|
|
5
|
1min Power Frequency Withstand Voltage
|
KV
|
For ground and phase to phase: 42, for isolating gap: 48
|
|
|
6
|
Rated Dynamic Stable Current
|
KA
|
20(4S)
|
|
|
7
|
Rated Dynamic Stable Current
|
KA
|
50
|
-
|
|
8
|
Rated Short - Circuit Making Current (Peak Value)
|
KA
|
50
|
50
|
|
9
|
Rated Short - Circuit Breaking Current (Expected Value)
|
KA
|
-
|
31.5
|
|
10
|
Rated Transfer Current
|
KA
|
-
|
1.5
|
|
11
|
Capacity of Interrupting No - load Transformer
|
KVA
|
1250
|
|
|
12
|
Rated Cable Charging Current
|
A
|
10
|
|
|
13
|
Mechanical Life
|
Times
|
4000
|
|
|
14
|
Tripping Time of Load Switch Triggered by Fuse
|
S
|
<0.06
|
|
|
15
|
Steady - state Current of Grounding Switch
|
KA
|
20(2S)
|
|
|
16
|
Peak Value of Steady - state Current of Grounding Switch
|
KA
|
50
|
|
|
17
|
Control Circuit Power Supply Voltage
|
V
|
AC/DC 110, 220
|
|
Application Scenarios
- Indoor Ring Network Distribution Stations: Core switching and protection device for 12kV ring network power supply systems in urban and residential areas.
- Industrial Power Distribution: Protects and controls medium-voltage power supply for factories, workshops, and industrial equipment, ensuring continuous production.
- Terminal Power Supply Systems: Ideal for terminal distribution scenarios in remote industrial parks and commercial buildings.
- Indoor Distribution Cabinets: Integrated into high-voltage switchgear to form a complete power distribution and protection system.
- Transformer & Cable Protection: Safely switches no-load transformers and cable charging currents, with reliable fault isolation.
Quality & Reliability
- Standard Compliance: Fully compliant with IEC and GB standards, ensuring global applicability and reliable performance.
- Rigorous Testing: Each unit undergoes strict electrical and mechanical performance testing before delivery, including arc extinction and short-circuit withstand tests.
- Durable Construction: High-quality insulating materials and robust mechanical components ensure long service life and resistance to electrical aging.
- Low Maintenance: Designed for stable, long-term operation with minimal maintenance requirements, reducing lifecycle costs.
Installation & Maintenance
- Installation: Designed for indoor mounting in dry, dust-free environments, with standardized mounting holes for easy integration into switchgear.
- Operation: Operators must hold professional electrical qualifications and follow strict procedures to avoid misoperation.
- Maintenance: Regularly inspect insulation components for cleanliness and mechanical parts for tightness; replace fuses in the FKRN12-12D unit as needed.
- Safety: Always confirm the earthing switch is engaged before performing maintenance to ensure personnel safety.
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