FN7-12/24 DR 12kV 24kV Interruptor seccionador de carga interno (LBS)

fn7 12/24 dr 12kv 24kv indoor load break switch (lbs)

Categoria Chave de desconexão de alta tensão, chave de aterramento, chave de interrupção de carga

FN7-12/24 DR indoor load break switch is designed for medium-voltage distribution systems up to 24kV.

It features compact structure, reliable load switching performance, optional fuse protection, and safe operation for switchgear and transformer applications.

Informação adicional

Detalhes do produto:

The FN7-12/24 DR Indoor Load Break Switch (LBS) is a medium-voltage indoor switching device designed for 12kV and 24kV power distribution systems.

It is widely used in switchgear panels, RMU systems, substations, industrial plants, and transformer protection applications. The “DR” type generally refers to a load break switch combined with fuse protection.

Key Features

Rated voltage: 12kV / 24kV
Rated current: 400A / 630A
Frequency: 50/60Hz
Indoor installation type
Compact structure for switchgear cabinets
Reliable arc-extinguishing performance
Fuse combination available for transformer protection
Optional earthing switch
Mechanical interlock system for safety
IEC standard compliant (IEC 62271-105)

Main Applications

Medium voltage distribution panels
Ring Main Units (RMU)
Transformer feeder protection
Industrial substations
Commercial building power systems
Renewable energy distribution systems

Especificações técnicas

Item	FN7-12DR	FN7-24DR
Tensão nominal	12kV	24kV
Corrente nominal	400A / 630A	630A
Frequência nominal	50/60Hz	50/60Hz
Short-Circuit Making Current	31.5kA / 50kA	50kA
Short-Time Withstand Current	20kA	25kA
Lightning Impulse Withstand Voltage	75/85kV	125/145kV
Fuse Combination Breaking Capacity	1600A	900A
Mechanical Life	2000 operations	2000 operations

Significado do modelo

Typical model examples:

FN7-12DR/400-31.5
FN7-12DR/630-20
FN7-24DR/630

Meaning:

FN7 = Indoor AC high-voltage load break switch
12 / 24 = Rated voltage
D = Earthing switch
R = Fuse combination
400 / 630 = Rated current
20 / 31.5 = Short-time withstand current (kA)

Product Advantages

Compact and Reliable

Suitable for compact switchgear designs and medium-voltage cabinets.

Fuse Protection Combination

The DR version works with current-limiting fuses to protect transformers against overload and short-circuit faults.

High Safety Performance

Interlocking structure prevents incorrect operation and improves operator safety.

Long Service Life

Mechanical endurance typically reaches 2000 operations.

Esboço e desenho

1. Faca de extinção de arco 2. Peça de contato com o arco e câmara de extinção de arco 3. Isolador 4. Base

5. Faca de contato dinâmico 6. Faca de contato estático 7. Dispositivo de armazenamento de energia da mola (dentro da luva do eixo principal) 8. Braço giratório da faca principal

Desenho 1 Esquema da chave de carga FN7-12 e tamanho da instalação

1. eixo principal 2. haste isolante 3. lâmina 4. contato 5. contato de arco
6. câmara de extinção de arco 7. mecanismo de energia armazenada por mola
8. braço de operação On/Off