• 12kV indoor high-voltage load break switch
12kV indoor high-voltage load break switch
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Model
FN5 - 12
Basic info
Brand ROCKWILL
Model NO. 12kV indoor high-voltage load break switch
Rated voltage 12kV
Rated normal current 400A
Rated frequency 50/60Hz
Series FN
Product Detail

Product Overview

The FN5 - 12 indoor AC high - voltage load break switch (hereinafter referred to as the load break switch) is suitable for AC 50Hz, 12kV networks. It is used for breaking load current and closing short - circuit current. The load break switch with a fuse can cut off short - circuit current and be used as a protection switch.

This load break switch can be equipped with the CS6 - 1 manual operating mechanism and the special CS manual operating mechanism for this product.

Key Features

  • Precise Current Control:Suitable for 12kV, 50Hz AC systems. It can stably break load current and close short - circuit current, ensuring normal operation and maintenance of the power grid as well as emergency operations during faults.

  • Extended Protection Function:When paired with a fuse, it can cut off short - circuit current and act as a protection switch, providing overload and short - circuit dual protection for power equipment and simplifying the protection levels of the distribution network.

  • Wide Scene Adaptability:Focused on indoor 12kV AC networks. It is suitable for typical indoor power distribution scenarios such as ring main units and box - type substations, meeting the needs of distribution network construction.

  • Flexible Mechanism Configuration:Supports the CS6 - 1 general manual operating mechanism and can also be adapted to the special CS mechanism, compatible with different operating habits and equipment matching requirements.

  • Mature Technical Architecture:Iterated based on the classic FN5 - 12 model. It has a compact structure, stable arc - extinguishing performance, high long - term operation reliability, and reduces operation and maintenance costs.

Technical Parameters

Name

Unit

Value

Rated Voltage

kV

12

Maximum Operating Voltage

kV

12

Rated Frequency

Hz

50

Name

Unit

Value

Rated Current

A

400

630

Rated Short - time Withstand Current (Thermal Stable Current)

kA/S

12.5/4

20/2

Rated Peak Withstand Current (Dynamic Stable Current)

kA

31.5

50

Rated Closed - loop Breaking Current

A

400

630

Rated Active Load Breaking Current

A

400

630

5% Rated Active Load Breaking Current

A

20

31.5

Rated Cable Charging Breaking Current

A

10

Rated No - load Transformer Breaking Current


No - load Current of 1250kVA Transformer

Rated Short - circuit Making Current

kA

31.5

50

Load Current Breaking Times

Load/Time

100%/20
60%/35

30%/75
5%/80

1min Power Frequency Withstand Voltage (Effective Value, to Ground, Phase - to - Phase/Isolation Break)

kV

42/48

Power Frequency Withstand Voltage, Between Isolation Breaks

kV

53

Lightning Impulse Withstand Voltage (Peak Value, to Ground, Phase - to - Phase/Isolation Break)

kV

75/85

Opening and Closing Operating Torque (Force)

N·m (N)

90(80)

100(200)

Technical Parameters of Fuse

Model

Rated Voltage (kV)

Rated Current of Fuse (A)

Rated Breaking Current (kA)

Rated Current of Fuse Element (A)

RN3

 

12

 

50

12.5

2, 3, 5, 7.5, 12, 15, 20, 30, 40, 50

75

12.5

75

100

12.5

100

200

12.5

150, 200

SDL*J

12

40

50

6.3, 10, 16, 20, 25, 31.5, 40

SFL*J

12

100

50

50, 63, 71, 80, 100

SKL*J

12

126

50

125

Operating Environmental Conditions

  • Altitude: Not exceeding 1000m;

  • Ambient Air Temperature: Upper limit +40°C, Lower limit -25°C (Not lower than -5°C for motor - operated mechanisms);

  • Relative Humidity: Daily average not greater than 95%, Monthly average not greater than 90% (+25°C);

  • Ambient air should be free from obvious pollution by corrosive or flammable gases, water vapor, etc.;

  • No frequent severe vibration.

Know your supplier
ROCKWILL
Rockwill Electric Group Global Manufacturer of High voltage and medium-voltage power equipment and smart grid solutions. Headquartered in Wenzhou, China. Serving 100+ countries with quality, innovation, and trust. What We Offer: • HV-MV switchgear (VCB, SF₆ circuit breakers, RMU, GIS) • Distribution transformers and substations • Smart grid and monitoring systems • Solar, wind, EV charging, and energy storage solutions • EPC turnkey power projects Certified: ISO 9001 / ISO 14001 / ISO 45001
Main Categories
High Voltage Electrical Apparatus
Business Type
Design/Manufacture/Sales
Highest Annual Export (USD)
$150,000,000
Professional Experience
16 years
Workplace
108000m²m²
占位
占位
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