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Load Break Switch

Load Break Switch 24kV 630A DNFLN36-24D GRL


Rated voltage:24kV

Rated frequency:50Hz

Rated current:630A

Rated peak withstand current:50kA

outdoor HV Isolation load switch

Load Break Switch Overview

The 24kV Load Break Switch is a compact and reliable medium-voltage switchgear designed for indoor applications. It combines the functions of load break, disconnector, and earthing switch into a single, maintenance-free unit.

Load Break Switch Features

1. Rotating double-break contact structure with three operating positions: closed, open, and earthed

2. Uses SF6 gas as the arc-extinguishing and insulating medium, ensuring that the main circuit is sealed and unaffected by external environmental conditions

3. Excellent safety performance: in case of internal arcing, a structural weak point in the enclosure will be blown open, directing the overpressure gas flow outside the switchgear cabinet to ensure safety

4. Compact design with high reliability: the load break switch, disconnector, and earthing switch are integrated into a single unit, sealed in an epoxy resin enclosure filled with SF6 gas, with a three-position interlock mechanism

5. Small size, lightweight, maintenance-free, and safe and convenient operation

Load Break Switch Technical Parameter

NO. Item Unit Data
1 Rated voltage kV 24
2 Rated frequency Hz 50
3 Rated current A 630
4 Rated peak withstand current kA 50
5 4s rated short-time withstand current kA 20
6 Rated making current kA 50
7 Rated breaking current A 630
8 Power frequency withstand voltage 1min phase, ground/fracture kV 50/60
9 Lightning impulse withstand voltage phase to phase, ground/fracture kV 125/145
10 SF6 gas relative pressure (20∘C20∘C gauge pressure) MPa ⩽0.1⩽0.1
11 Rated operating voltage (motor) V AC220, DC220
12 Shunt trip coil rated voltage V AC220, DC220
13 Average opening speed m/sm/s 3.5±1.53.5±1.5
14 Average closing speed m/sm/s 3.5±1.53.5±1.5
15 Three-phase closing and opening time difference ms ⩽3⩽3
16 Main circuit resistance μΩμΩ ⩽120⩽120
17 Manual operating torque N.m ⩽160⩽160
18 Interphase center distance mm 280±0.5280±0.5

Load Break Switch Application

The 24kV Load Break Switch offers a reliable and compact solution for medium-voltage power distribution applications. Its innovative design and advanced features make it an ideal choice for ensuring safe and efficient operation in various industrial and commercial settings.

The 24kV Load Break Switch is a crucial component in medium-voltage power distribution systems, particularly in various applications within the electrical grid. Here are some specific application scenarios:

1. Urban Power Distribution

In urban environments, the 24kV Load Break Switch is used in substations and distribution networks to manage and control the flow of electricity. It facilitates load switching, isolation, and grounding, ensuring reliable power supply to residential and commercial buildings.

2. Industrial Facilities

In industrial settings, this switch is essential for connecting and disconnecting power to machinery and equipment. It provides a safe means to isolate equipment for maintenance and ensures operational continuity in manufacturing processes.

3. Renewable Energy Systems

The switch is widely utilized in renewable energy applications, such as wind and solar farms. It helps in managing the integration of renewable energy sources into the grid, allowing for efficient load management and protection of electrical equipment.

4. Transportation Infrastructure

In transportation systems, such as subways and light rail, the 24kV Load Break Switch is employed to control power distribution. It ensures safe operation and maintenance of electrical systems that power trains and station facilities.

5. Data Centers

Data centers rely on stable and uninterrupted power supply. The 24kV Load Break Switch is used to manage electrical loads and provide redundancy, ensuring that critical systems remain operational during maintenance or in the event of a fault.

6. Telecommunication Facilities

Telecommunication infrastructure requires reliable power to maintain communication networks. The switch is used to ensure that power can be safely managed and isolated during maintenance activities.

7. Agricultural Applications

In agricultural settings, particularly in irrigation systems and processing plants, the switch is used to control power supply to pumps and machinery, enhancing operational efficiency and safety.

The 24kV Load Break Switch serves a vital role across various sectors, providing safety, reliability, and efficiency in power distribution. Its ability to handle medium-voltage applications makes it indispensable in modern electrical infrastructure.

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