Unit type AC metal enclosed ring network switchgear

NegotiableUpdate on 05/14

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

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.

Product Details

1、 Product Overview

The HXGN15-12 (SF6) type modular AC metal enclosed ring network switchgear (hereinafter referred to as the ring network cabinet) is a new generation of high-voltage electrical products that we have successfully designed and developed by introducing advanced foreign technology and in accordance with the requirements of domestic rural and urban power grid transformation. All technical performance indicators comply with IEC62271-200:2003 and GB3906 standards.
The main switch, operating mechanism, and components of the ring main unit are made of ABB original parts or domestically assembled SFL-12/24 switchgear using imported components. ABB original HAD/US SF6 can also be installed according to user needs. Circuit breaker or VD4-S vacuum circuit breaker. Its operation modes are divided into manual and electric.
The cabinet is processed by CNC machine and riveted, with a protection level of IP3X, and has reliable mechanical interlocking and anti misoperation functions. This product has significant features such as small size, light weight, beautiful appearance, easy operation, long life, high parameters, no pollution, and minimal maintenance.
HXGN15-12 (SF6) type modular AC metal enclosed ring network switchgear is suitable for receiving and distributing electrical energy in 50Hz, 12kV power networks. The main switch inside the cabinet is SF6 switch.

2、 Model and meaning

3、 Normal usage conditions

● Environmental temperature: upper limit+40 ℃, lower limit -25 ℃;
● Altitude: The altitude does not exceed 2000m;
Relative temperature: daily average not exceeding 95%; Monthly average not exceeding 90%;
● Surrounding environment: The surrounding air is not significantly polluted by corrosive gases or flammable gases, water vapor, etc;
●No frequent severe vibrations.

4、 Main technical parameters

project	unit	parameter
rated voltage	kV	12
Rated frequency	Hz	50
Rated current of main busbar/maximum rated current of fuse	A	630,125
Rated short-time withstand current of main circuit and grounding circuit	kA/S	20,3
Rated peak withstand current of main circuit and grounding circuit	kA	50
Rated short-circuit closing current of main circuit and grounding circuit	kA	50
Full capacity breaking number of load switch	order	100
Circuit breaker breaking current	kA	31.5,40
Rated closed loop breaking current	A	630
Rated transfer current	A	1600
mechanical life	order	2000
1-minute power frequency withstand voltage (peak) relative to ground/isolation fracture	kV	42,48
Lightning impulse withstand voltage (peak) phase to phase, ground/isolation fracture	kV	75,85
Secondary circuit 1-minute power frequency withstand voltage	kV	2
protection grade		IP3X

5、 Structural characteristics

Cabinet structure
The ring network cabinet body is made of 2mm thick aluminum zinc coated plate (or cold-rolled plate sprayed with plastic) and riveted. There are two pressure release holes at the back of the cabinet, one of which is for electricity
Cable room, another for load switch/busbar room. This structure can maximize the reliability of personal installation and equipment operation.
● Each interval chamber
○ Busbar room:
The busbar room is located at the top of the cabinet and connected to adjacent switchgear.
The load switch is an independent unit filled with SF6 gas inside.
○ Cable room
Approximately 75% of the space is used for cable connections, fuses, grounding switches, and CT and PT installations.
○ Institutional chamber and interlocking
The small chamber includes operating mechanisms and mechanism interlocks, as well as position indicators, auxiliary contacts, trip coils, live displays, and interlocks.
○ Relay box
The relay box is located at the top of the cabinet and is optional. The small chamber is used to install special devices such as instruments, relays, and motor units.
○ Circuit breaker room
A circuit breaker (SF6 or vacuum) can be placed below the load switch.
● Pressure release
○ Pressure release above
The above is used to release the gas pressure generated during internal arc accidents in the busbar and load switch room.
○ Pressure release below
The following is used to release the gas pressure generated during an arc accident inside the cable compartment.

6、 External dimensions

project	unit	parameter
Circuit breaker cabinet width	mm	750
Other cabinet widths	mm	375,500
tall	mm	1600,1850
deep	mm	980,900
Relay box height	mm	450

7、 Basic components

SFL Technical Data
rated voltage	kV	12	17.5	24
impulse withstand voltage	kV	75	95	125
1-minute power frequency withstand voltage	kV	28	38	50
Rated current	A	630	630	630
Closing capacity	kA	50	50	40
Thermal stability current	kA/S	20.3	-	-
Breaking capacity	A	1700	-	-
Maximum fuse	A	125	-	-
polar distance	mm	210	210	210

VD4-S Technical Data
rated voltage	kV	12	17.5	24
impulse withstand voltage	kV	75	95	125
power-frequency withstand voltage	kV	28	38	50
Rated current	A	630	630	630
Thermal stability current	kA/S	20.3	-	-
polar distance	mm	210	210	210

This switch has many advantages:
The arc duration is short, and the insulation strength in the arc extinguishing chamber recovers quickly.
Ensure safety and reliability even in the most demanding environments.
○ Disconnectable low value sensitivityCapacitive current.
The operating mechanism is simple, capable of quick opening and closing, and has a long mechanical lifespan.
○ Reduced the wear and tear of contacts and arc extinguishing chambers, and also extended their electrical lifespan.
Allow for multiple operations, but with minimal maintenance workload.
Lightweight structure, compact, and stable.

Standard Equipment Optional equipment-S5 Solid State Overcurrent Relay
-Electric operation-PR511-PR512 overcurrent relay
-Manual operation-Low voltage release device
-Auxiliary contacts (2 normally open and 2 normally closed) - interlocking strong loop
-Partial excitation trip, with position contact HAD120625
-Excitation closing coil HAD120520
-Gas pressure control of signal contact HAD170620
HAD170616