Armored Removable Metal Enclosed Switchgear

NegotiableUpdate on 05/14

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Nature of the Manufacturer: Producers

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Overview

Armored Removable Metal Enclosed Switchgear

Product Details

1、 Product Overview

As the name suggests, high and low voltage distribution cabinets are distribution equipment used in power supply systems for energy distribution, control, metering, and cable connection. Generally, power supply bureaus and substations use high voltage switchgear,
Then, the low-voltage side of the transformer is stepped down and led out to the low-voltage distribution cabinet. The low-voltage distribution cabinet is connected to various power distribution panels, control boxes, and switch boxes. Inside, some switches, circuit breakers, fuses
A power distribution device that integrates protective devices such as buttons, indicator lights, instruments, and wires to meet the design functional requirements. Commonly known as high and low voltage switchgear or complete sets of high and low voltage electrical equipment.

2、 Model and meaning

3、 Normal usage conditions

1. Surrounding air temperature: maximum temperature+40 ℃, minimum temperature -15 ℃.
2. Humidity conditions:
Daily average relative humidity: ≤ 95%.
The daily average water vapor pressure shall not exceed 2.2kPa.
Monthly average relative humidity: ≤ 90%.
The monthly average water vapor pressure shall not exceed 1.8kPa.
3. Altitude: 1000m and below.
4. Seismic intensity: not exceeding 8 degrees.
5. The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.
6. Places without frequent and intense vibrations.
7. If used under normal conditions exceeding the requirements of GB3906, it shall be negotiated between the user and the manufacturer.

4、 Main technical parameters

project			unit	data
Rated power supply			kV	3.6, 7.2, 12
Rated frequency			Hz	50
Rated current of circuit breaker			A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated current of switchgear			A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated short-time withstand current (4s)）			kA	16. 20, 25, 31.5, 40, 50
Rated peak withstand current (peak)）			kA	40, 50, 63, 80, 100, 125
Rated short-circuit openingbreakelectric current			kA	16. 20, 25, 31.5, 40, 50
Rated short-circuit closing current (peak value)）			kA	40, 50, 63, 80, 100, 125
rated insulation level	1-minute power frequency withstand voltage	interpolarExactlyGround to ground	kV	24, 32, 42
	1-minute power frequency withstand voltage	between open contacts	kV	24, 32, 48
	Lightning impulse withstand voltage (peak value)）	interpolarExactlyGround to ground	kV	40, 60, 75
	Lightning impulse withstand voltage (peak value)）	between open contacts	kV	46, 70, 85
protection grade				The shell is IP4X, and when the compartment and circuit breaker room doors are opened, it is IP2X.
External dimensions			6300~1250A	800×1500（1660）×2300
External dimensions			1600~400A	1000×1500（1660）×2300

Note: 1. The short-circuit capacity of current transformers should be considered separately;
2. The technical parameters of ZN63A-12 are detailed in the corresponding samples.
3. At an altitude of 000m, the rated current is ≤ 1250A and the rated breaking current is ≤ 31.5kA.

5、 Structural features

1. Structure of switchgear.
2. All metal assembly, modular assembly structure.
3. The cabinet is made of imported aluminum zinc coated steel sheet, processed by FMS flexible processing system, using advanced multiple folding technology, connected with rivet nuts and high-strength bolts, with high precision and corrosion resistanceCorrosion resistant, lightweight, high-strength, and highly versatile.
4. Can be equipped with ZN63A-12VS series or OVD4 series vacuum circuit breakers for production, with wide applicability, high reliability, and maintenance free.
5. The handcart is equipped with working and testing positions, each with positioning and display devices, ensuring safety and reliability.
6. Cars of the same specification can be freely interchanged, with strong interchangeability.
7. Transported by dedicated transport vehicles, the handcart is easy to operate and flexible.
8. The cable room can accommodate up to 9 single core cables.
9. Reliable mechanical and electrical interlocking devices fully meet the "five prevention" requirements.
10. The high-pressure chamber has pressure relief channels to ensure personal safety.
11. The face door is equipped with an observation window, which can observe the working status of indoor components.

6、 Schematic diagram of switchgear structure

● Cable insulation

The switchgear adopts a mid mounted design, resulting in a larger space in the cable room. Current transformer 15 and grounding switch 14 are installed on the rear wall of the compartment, and lightning arrester 12 is installed on the lower part of the compartment. After opening the cabinet door, construction personnel can enter the cabinet from below for installation and maintenance. The cable connecting conductors in the cable room can accommodate 1-3 single core cables per phase. When necessary, 6 single core cables can be connected in parallel to each phase. A detachable non-metallic sealing plate or non-magnetic metal sealing plate with open seams is provided at the bottom of the cabinet where the cables are connected, ensuring convenient construction.
● Relay instrument room

The relay instrument room can be equipped with relay protection components, instruments, live monitoring indicators, and secondary equipment with special requirements. The control line is laid in a sufficiently spacious cable tray with a metal cover plate, which can isolate the secondary line from the high-voltage room. The left cable tray is reserved for controlling the introduction and extraction of small busbars, and the control wires inside the switchgear are laid on the right side. There are also small busbar crossing holes on the top plate of the relay instrument room for easy construction. When wiring, the top cover of the instrument room can be flipped over for easy installation of small busbars

7、 External dimensions of switchgear

project	parameter
Height B (mm)		2370
Width A (mm)	The rated current of the branch busbar reaches 1250A, and the thermal stability current is 40kA	650/800
Width A (mm)	The rated current of the branch busbar reaches 1600A or above	1000
Depth C (mm)	Cable inlet and outlet lines	1500
Depth C (mm)	Overhead incoming and outgoing lines	1660

8、 Installation

The foundation of the switchgear is shown in Table 6 and Figure 4, with "★" indicating the schematic diagram of the transformer cabinet foundation used
Installation of switchgear;
The installation foundation dimensions and installation dimensions of the switchgear (see Figure 5, Figure 6, Table 7, Table 8), (please pay attention to the size prompts for the transformer cabinet foundation used);
When the cabinet is arranged in a single row, the operating corridor in front of the cabinet should be 25 meters. When arranged in a double row, the operating corridor between cabinets should be 3 meters;
According to the engineering requirements and drawings, transport the switchgear to their specific locations. If a row of longer switchgear is arranged (with more than 10 units), the consolidation work should start from the middle part;
When transporting switch equipment, specific transportation tools such as cranes or forklifts should be used, and the use of roller pry bars is strictly prohibited. After the switch equipment is in place on the foundation, the lifting plate and fixing parts should be removed;
On the basis, install switchgear one by one, including both horizontal and vertical aspects, and the unevenness of switchgear installation shall not exceed 2mm;
When the switchgear is fully assembled (spliced), M12 anchor bolts can be used to firmly connect it to the foundation frame or welded to the foundation frame with electric welding.

9、 Installation diagram of switch equipment foundation

10、 Main Circuit Scheme Diagram

11、 Ordering Notice

The parameters in this plan are the standard configuration provided by our company. If the customer has no specific requirements, the company will supply according to the standard configuration. If it exceeds the requirements of this plan, please explain separately.