Overview

XGN15-12 unit type AC metal closed ring network switchgear (hereinafter referred to as ring network cabinet) is a new generation of high-voltage electrical products that we have successfully designed and manufactured in accordance with the requirements of domestic rural power and urban power network transformation. All technical performance indicators are in line with IEC62271 -200:2003 and GB3906 standards.

ring network cabinet shall be ABB original parts or SFL-1 2/24 switch equipment assembled and produced domestically with imported parts, and ABB original owned/American SF6 can also be installed according to user needs. Circuit breaker or vd4-s type vacuum circuit breaker. Its operation mode is divided into dynamic, electric two kinds.

cabinet is made by moving and connecting after being processed by CNC machine tools, with a protection level of IP3X, and has reliable mechanical interlocking and anti-misoperation functions. This product has the characteristics of small size, light weight, beautiful appearance, easy operation, long life, high parameters, no pollution, less maintenance and so on.

XGN15-12 type unit type AC metal closed ring network switchgear, suitable for AC 50Hz,12kV power network, as the receiving and distribution of electric energy. The main switch in the cabinet is SF6 switch

Model Meaning

vacuum circuit breaker

functions and characteristics

Cabinet structure

The ring network cabinet body is formed by 2mm thick aluminum-zinc plate (or cold-rolled plate after plastic spraying). There are two pressure release holes behind the cabinet, one for the cable room and the other for the load switch/bus room. This structure can guarantee the reliability of personal installation and operation of equipment to the greatest extent.

Each compartment

& loz; Busbar Room

busbar compartment is located at the top of the cabinet and connects adjacent switch cabinets.

& loz; load switch is an independent unit, filled with SF6 gas.

& loz; Cable Room

space is used for cable connection, fuse, grounding switch and CT and PT installation.

& loz; mechanism chamber and interlock

chamber contains the operating mechanism and mechanism interlock as well as position indication, auxiliary contacts, trip coil, live display and interlock.

& loz; relay box

relay box is at the top of the cabinet and is optional. The chamber is used to install special devices such as meters, relays and motor units.

& loz; Breaker Room

a circuit breaker (SF6 or vacuum) to be placed under the load switch.

♦ Pressure release

& loz; Pressure release above

above is used to release the gas pressure generated during the arc accident inside the bus bar and the load switch chamber.

& loz; Pressure release below

below is used to release the gas pressure generated during an arc accident inside the cable compartment.

♦ sfl load switch (ABB original)

SFL type load switch is a double break point, rotary moving contact, SF6 gas is used as arc extinguishing medium, and the moving and static contact is installed in the mold-cast epoxy resin shell with reinforced structure. At the end of the operating shaft is a transparent hot-pressed plastic end cap, through which the state can be observed.

each switch is permanently sealed after being filled with SF6 gas at a pressure of 1.4 bar (SFL means "permanently sealed"), it can be checked for gas leakage with an ammonia detector.

switch is not limited to vertical or horizontal installation. In the unit cabinet, the typical installation method is to place a steel partition between the cable room and the bus room and install it horizontally.

this installation, the switch housing is enclosed in a grounded steel plate and the bus bar is isolated from the cable connector to meet the most stringent safety requirements for operation and maintenance o

In the event of internal arcing, there is a structural weak point at the rear of the shell, which will be flushed open to divert the arc gas out of the switch, and then the arc relief valve on the cabinet will be flushed open and the overpressure gas will be directed out of the cabinet.

Optionally equipped with an auxiliary contact 2 normally closed 2 normally open + extended 2 normally open 2 normally closed-shunt trip coil for SFL of the belt mechanism.

SFL12/17.5 IVDP575305RI SFL24K IVDP575304RI for K-selection mechanism

switch SFL12/17.5 IVDP575303RI SFL24A IVDP575302RI of select A mechanism

vd4-s Vacuum Circuit Breaker (ABB Original)

vd4-s type vacuum circuit breaker is specially designed for unit switch cabinets, and its breaking capacity is sufficient to cope with various conditions, including normal switching equipment or branch network operation and breaking short circuit under special circumstances. Vacuum circuit breakers are particularly suitable for networks that operate frequently within the operating current range. The vd4-s vacuum circuit breaker is equipped with a spring operating mechanism with reclosing function (sub -0.3S-in-sub -180S-in-sub), and has reliable action and long service life. The whole circuit breaker includes three vacuum switch bubbles, the external is resin insulation cylinder, vertical structure. The extinguishing of the arc is the result of a forced displacement of the arc due to the spiral groove of the arcing contact. Since the minimum static vacuum in the insulating cylinder of the switch is 10-4 to 10-8 bar, a very high dielectric strength can be obtained despite the relatively small gap between the switching contacts. The arc is extinguished at the first zero point of the short-circuit current.

, due to the small contact gap, the high conductivity of the metal gas plasma zone at the arc pressure drop, and the short arc time, the arc energy is extremely low, which is beneficial to the extension of the contact and even the entire switch life.

Standard Equipment-Manual Operation

-Electric operation

-auxiliary contact 2 normally open 2 normally closed

-shunt trip with position contact

-shunt closing coil

optional equipment-S5 or PR512 overcurrent relay

-Low Voltage Release

-Interlocking coil

Breaker model

VD41206-20S

VD41706

VD42406

Yes/American SF6 Circuit Breaker (ABB Original)

HAD/US SF6 circuit breaker is specially designed for ring network switch cabinet. Its breaking capacity is sufficient to cope with various conditions, including normal switching equipment or branch network operation and breaking short circuit under special circumstances. The new generation has the latest SF6 breaking process, coupled with the simple structure, only a small operating energy, so simple energy storage type operating mechanism has the characteristics of long mechanical life when used. The circuit breaker adopts the spring operating mechanism to realize the automatic reclosing operation. The special structure of the switch-off part can ensure the extraordinary extension of electrical life. The switch is made into a split independent column structure and is placed vertically. The switch adopts the principle of self-energy arc blowing, that is, the energy of the arc itself is used to extinguish the arc. When the circuit breaker is opened, an arc is generated between the moving and static contacts in the arc extinguishing chamber. The high temperature and high ionization efficiency generated by the arc should make the SF6 gas pressure rise rapidly in the arc extinguishing chamber. With the increase of pressure and the gradual separation of the arcing contacts, the gas is forcibly sprayed out of the arc extinguishing chamber through the nozzle, thus making the arc sparse, cooling, breaking and preventing reignition. Therefore, the moving part of the switch only needs little energy, further enhance the reliability of long-term operation.

♦ This switch has many advantages:

& loz; Arc duration is short, the insulation strength in the arc extinguishing chamber recovers quickly.

& loz; is safe and reliable even in the most demanding environments.

& loz; Can switch off low-value inductive and capacitive currents.

& loz; Simple operating mechanism, fast opening and closing, long mechanical life.

& loz; reduces the wear and tear of contacts and arc chamber, I .e. prolongs the electrical life.

& loz; Allows a lot of operations, but little maintenance.

& loz; Lightweight construction, compact and stable.

Standard Equipment Optional Equipment

optional equipment S5 solid overcurrent relay

-electric operation-PR511-PR512 overcurrent relay

-Manual operation-Low voltage release

-auxiliary contact (2 normally open and 2 normally closed)-interlocking strong ring

-shunt trip with position contact HAD120625

-shunt closing coil HAD120520

-signal contacts

HAD170616

♦ K and A type operating structure (ABB original parts)

This mechanism is used to operate load switches and load switches with fuses

& loz;K-type mechanism: K-type mechanism is a single spring mechanism used for load switch closing and closing operation. The closing and closing of the switch is realized through the dead point through spring energy storage. The K-type mechanism can select the motor to achieve electric operation.

& loz; type mechanism: type mechanism double spring mechanism, one of which is used for switch closing and the other is used for switch opening. The switch shall be placed in the energy storage state before closing with the closing spring, and the opening shall be automatically placed in the energy storage state after closing operation. So you can use manual, shunt trip coil or fuse firing pin to trip.

Mechanism Model

-for load switch

-K mechanism 1VDP586042R1 optional equipment

-for load switch with fuse-motor operated on K mechanism

-A mechanism 1VDP575013R1

♦ SFL-12/24 type switchgear

SFL12/24 switch equipment are imported original parts. The switchgear is a double-break, three-position, rotary moving contact, and SF6 gas is used as the arc extinguishing medium. The movable contact is placed in a die-cast epoxy resin housing of a reinforced structure.

Each switch is permanently sealed after being filled with 0.4 bar SF6 gas, an ammonia detector can be used to check for gas leaks. The vertical and horizontal installation of the switch is not limited. The typical installation method in the ring network cabinet is to place a steel plate between the cable room and the bus room and install it horizontally. This installation isolates the bus bar from the cable joint to meet the most stringent safety requirements for operation and maintenance. In the event of internal arcing, there is a structural weak point at the rear of the shell, which will be flushed away. Then the arc relief valve on the cabinet opens and directs the overpressure air flow to the outside of the cabinet. Optional equipment-auxiliary contact 2 normally closed 2 normally open extension 2 normally open 2 normally closed 1 shunt trip coil for SFL of the belt mechanism.

Technical Data

Dimensions