Overview

HXGN Q-12 series AC metal ring network switchgear is a compact and expandable metal closed ring network switchgear suitable for distribution automation, which uses FLND-12 SF6 load switch as the main switch and the whole cabinet adopts air insulation. It has the characteristics of simple structure, flexible operation, reliable chain and convenient installation. For a variety of different applications, different user requirements can provide satisfactory technical solutions.

HXGN□ -12 series AC metal ring network switchgear is FLN36-12 SF6 load switch produced by our company or SFG SF6 load switch produced by ABB company, and VS1, VD4/S, ISM vacuum circuit breaker or HD4/S5 SF6 circuit breaker can also be equipped according to the needs of users. Load switches and circuit breakers can be manually or electrically operated, with optional electric operating mechanisms, PT, CT, FTU and communication devices to achieve distribution automation functions.

normal conditions of use

1. Altitude: not more than 1000m;

2. Ambient temperature: maximum temperature: + 40C; Minimum temperature:-35 C;

3. Environmental humidity: daily average value shall not exceed 95%; Monthly average value shall not exceed 90%;

4. Seismic capacity: Grade 8;

5. There is no explosive and corrosive gas in the surrounding air, and there is no severe vibration and shock in the installation place.

Reference Standard

vacuum circuit breaker

Structure and basic components of circuit breaker cabinet

basic structure

HXGN port -12 circuit breaker cabinet is mainly used for the incoming cabinet of the main power supply or standby power supply in the ring network power supply system and the intermediate section cabinet of the dual power supply system. The circuit breaker can be VS1 type, VD4/S type, ISM vacuum circuit breaker or HD4/S type SF6 circuit breaker, with slightly different dimensions. The circuit breaker cabinet consists of instrument room, bus room, load (isolation) switch room, circuit breaker room and cable room from top to bottom. CT, PT, lightning arrester, grounding switch and relay protection device can be configured according to user's needs, and it has reliable "five prevention" interlocking function.

VS1 vacuum circuit breaker is spring energy storage type, which can be operated by AC or DC, or manually. It is currently the largest domestic vacuum circuit breaker in China. Its main conductive circuit and operating mechanism integrity design, stable quality, reliable performance. Main electric circuit composite insulation, small volume. Handcart or fixed installation is available. Corresponding to 630A rated current specification, rated short-circuit breaking current up to 25kA.

VD4/S type vacuum circuit breaker, or HD4/S type S F 6 circuit breaker is specially designed for ring network switch cabinet by ABB company of Italy. its breaking capacity is sufficient to cope with various conditions, including the operation of normal switching equipment or branch network and breaking short-circuit current under special circumstances. These two kinds of circuit breakers A,B and C are arranged vertically, easy to install, small in size and light in weight. Rated short-circuit breaking current up to 25kA.

Germany ISM permanent magnet vacuum circuit breaker is specially designed for the installation of 10kV ring network cabinet surface design, with the 21st century high-voltage switch the latest technical level of high-tech products, its permanent magnet operating mechanism is an electronic control, with online detection components, permanent magnet to maintain the electromagnetic.

Basic Components

(A) Upper unit, including:

* three-position SF6 load switch * operating mechanism with mechanical position indicating device * interlocking device * integrated low-voltage chamber * relay protection device * bus chamber shell

* Busbar

(B) middle unit, including

* Circuit breaker chamber * VS1 type or VD4/S type, ISM type vacuum circuit breaker or HD4/S type SF6 circuit breaker

(C) Lower unit, including

* Grounding busbar * Cable chamber housing * Cable chamber floor with cable support

Optional Components

* Integrated live display or portable live display insertion interface * Auxiliary contacts at each position: 2NO + 2NC * SF6 gas pressure monitor with alarm contact (SF6 load switch) * Current transformer * Voltage transformer * Lightning arrester * Electric operating mechanism (SF6 load switch) * Lower grounding switch * Short circuit grounding fault indicator * Cold shrink indoor cable terminal

Other cabinet types

Bus connection cabinet

The busbar connection cabinet is used for the connection of cables and busbars. The cabinet is equipped with cable clamps for fixing cables. Can also be optional current transformer, lightning arrester and other components. Cabinet 375mm or

500mm o

Bus section cabinet

bus section cabinet is always used together with the bus lifting cabinet. The basic cabinet is 375mm wide and equipped with a FLN36-12 or FLN48-12 or SFG type three-station SF6 load switch

Off

in bus section.

Busbar lifting cabinet

bus bar lifting cabinet connects the bus bar with the bottom of the sectional cabinet equipped with load switch. The cabinet can be used as a metering cabinet when it is 500mm wide.

Metering cabinet

metering cabinet is used to measure voltage, current and power. The front and lower doors are equipped with special lead blockade to facilitate the lead seal of power supply department.

Dual power incoming cabinet

This equipment consists of two electric load switch counters and a full set of automatic switching devices. In order to realize the automatic switching function of the system, the system is divided

to the traditional PT acquisition voltage, a charged display verification mode is also introduced, and the equipment can be set to the following two working modes according to the actual situation:

* incoming line is one master and one standby

* Two incoming lines are standby for each other

auxiliary equipment

DJD-1 type short-circuit ground fault indicator adopts logic circuit to realize overcurrent alarm, delay reset function, and can also be reset manually. Three short-circuit fault sensors are respectively installed on the three-phase power cable, one ground fault sensor is installed on the three-core cable, the display unit is fixed on the panel of the switch cabinet, and the sensor and the display unit are connected by optical fiber or cable. The short-circuit grounding fault indicator helps the line patrol personnel to quickly determine the fault section, eliminate the fault in time, and shorten the fault power failure time.

condensation controller

condensation controller is composed of a temperature (humidity) sensor, a control unit and a heater. When the ambient temperature (humidity) reaches a preset range, the control unit starts the heating circuit. It can monitor the temperature and humidity of the switchgear installation environment in real time, so that the ambient temperature index meets the working requirements and can effectively prevent condensation. Typical condensation controller technical parameters are as follows:

condensation initiation control: 85% RH 5% RH(20C) condensation stop: 75% RH 5% RH response speed: typical value <35

output: 1 times the working voltage, rated power resistive load AC220V3A heater rated power: 75-100w

FTU and communication unit

HXGN□ -12 series AC metal ring network switchgear can be configured with DAT-1 L and other types of power distribution automation terminals (feeder automation terminal unit, FTU). The switch cabinet is incorporated into the data acquisition and monitoring system (SCADA system) of the power distribution automation system through optical fiber communication system to realize remote control, telemetry and remote signaling functions of the switch cabinet. With the master station software, it can also realize the functions of fault isolation, recovery and network reconfiguration of the distribution network.

DAT-1L distribution automation terminal

The main functions of a typical DAT-1L distribution automation terminal are as follows:

Information acquisition and processing functions: including 48-way remote communication, 8-way telemetry, 8-way remote control and 1-way DC.

parameter setting function: it has the function of parameter remote setting and local setting.

Timing function: Receive commands from the master station or sub-station and keep synchronized with the system clock.

equipment: regularly detect internal important chips, inform the sub-station or main station of errors and reflect internal working conditions; It has power-on and software self-recovery function; It has watchdog to monitor the running state of the program.

fault detection function: it can quickly detect faults and actively report the fault information and nature to the main station or sub-station for fault isolation. Including zero sequence overcurrent overvoltage detection, line overload detection and line three-phase overcurrent detection.

HXGN□-12II Type Contour Mounting Dimensions