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11KV Vacuum Circuit Breaker

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

ZW32 series Breakers are used in distribution systems. Circuit breakers are used to make and break normal and fault currents. Breakers are fully equipped with sensors and a controller to provide a means of protection and control. In case of a line fault, breakers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults. The manufacture, design, and testing of the vacuum recloser is based on current standards IEC 62271-100.

 Application of 11KV Vacuum Circuit Breaker

The vacuum circuit breaker is equipped with one integrated current transformer per pole. The current transformer has a ratio of 600 A:5 A. It is for protection purposes and optimized for operation with the controller.

 Technical parameters of 11KV Vacuum Circuit Breaker

Products Type

ZW32-12

Maximum System Voltage

12kV

Rated Continuous Current

630A

Rated Frequency

50/60Hz

Short Time Withstand Current

20kA/1sec

Mainly Active Load Current

630A

Number of Load-break Operations

30

Short-circuit Making Current (peak)

50kA

Number of Making Operations

5 times

Cable Charging Current

25A

Line Charging Current

1.5A

Closed Loop Circuit Current

630A

Transformer Magnetizing Current

22A

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters

45kV

DryCondition-1min，Ph- Ph, Phase to Earth

42kV

Dry Condition - 1 min AcrossInterrupter

48kV

Phase to Phase, Phase to Earth

75kV

Across Interrupter

85kV

Internal Arc Test

20kA /0.1 sec

Arc Extinction Medium

vacuum

Insulation Medium

vacuum

Creepage Distance (Silicon)

780mm

Dry arcing distance

≥200mm

IP Level

67

Closing/Opening Time

＜1sec

Mechanical Operations (Guaranteed)

10000times

Operating Temperature (*Manual Type)

-25～+70℃

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11KV SF6 Gas Load Break Switch

https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/

The FWX1-12/630 outdoor SF6 load break switch is suitable for the distribution network with the highest voltage 11kV, the rated current 630A, and the rated frequency 50/60Hz, which can break off and close the load current and overload current in the power system. The load switch is equipped with an intelligent controller to realize the automation of the distribution system.  

 Features of 12KV SF6 Gas Load Break Switch

The operating mechanism with spring energy storage ensures fast closing and switching operation (<1000ms).

 Operator place: Local/Remote.

 Equipped with an electronic controller, it can be operated locally or with FTU/RTU interface for console operation.

 Specification of 11KV SF6 Gas Load Break Switch

Parameter Name

Unit

Technical Requirement

Rated Maximum Voltage

kV

12

Rated continuous Current

A

630

Short Time Withstand Current

kA

20

Short-circuit Making Current (peak)

kA

50

Power Operating Time (Close/Open)

sec

<2

Mechanical Operations

times

3000

Rated full load operations

times

400

Breaking Capacity

Main Active (0.7pf)

A

630

Cable charging

A

5

Transformer magnetizing

A

10

Lightning Impulse Withstand Level

Phase to Earth

kV

75

Across interrupter

kV

85

Power Frequency withstand voltage

Phase to Earth

kV

42

Across interrupter

kV

50

Other Ratings & Specifications

Creepage Distance (Silicon)

mm

830

IP Level

 65

Arc Extinction Medium

 SF6 Gas

Insulation Medium

 SF6 Gas

Leakage Rate

cc/ sec

≤0.5%

Product size (max)

Width

mm/in

1368/54

Height

mm/in

530/21

 Environmental Conditions for Equipment Use

Environmental conditions for equipment use

2.1 height above sea level：≤3000m

2.2 Air temperature： -40℃～+50℃

Maximum diurnal temperature difference：≤25℃

2.3  Relative humidity：Daily mean95%    monthly average90%

2.4  Maximum wind speed：≤34m/ｓ

2.5  Earthquake intensity：＜8 degree

2.6 ��Icing thickness:   ＜10mm

2.7  Thickness of snow:   ＜35mm

2.8  irradiance:   ＜0.1W/cm2

2.9  Pollution grade: Ⅲ class, Ⅳ class Ⅲ, Ⅳ

2.10  Installation site: No fire disaster, explosion danger, chemical corrosion, and frequent strenuous vibration places

 Working Procedure of 11KV SF6 Gas Load Break Switch

 The load switch that uses SF6 gas as insulation and arc extinguishing medium is called the SF6 load switch. It can be used to switch and switch load current and overload current, and it can also be used to switch and switch no-load circuits, no-load transformers, and capacitors. Groups, etc., all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price. But the load switch cannot disconnect the short-circuit current.

 Intended Use of 11KV SF6 Gas Load Break Switch

 The SF6 load switch is an excellent load switch that many users have experienced in recent years. In addition to its long electrical life and strong braking force, it has the same advantages as the vacuum load switch. Its outstanding advantage is that it is easy to achieve three working positions (connected, disconnection and grounding), small current (inductance, capacitance) breaking, strong resistance to severe environmental conditions. It is suitable for popularization and application in urban and rural medium voltage distribution networks.

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Electric Power Equipment & Supplies

https://www.zhgopower.com/products/

lectrical Equipment & Supplies: Directly related to the production of electrical energy and transmission and distribution equipment called primary equipment, such as load break switch, circuit breaker. The auxiliary equipment that monitors, measures, controls and protects the primary equipment is the secondary equipment, such as feeder terminal unit, distribution terminal unit, and so on.

 Types of Electrical Equipment & Supplies

Pole Mounted Switch

A kind of safety switch to ensure the safety of electricity consumption is mainly used to isolate the high voltage of the circuit, which can be divided into Load Break Switch and Vacuum Circuit Breaker according to the arc extinguishing ability of the contact.

 Power Distribution Equipment

The power distribution is the last stage of power transmission; It transfers electricity from the transmission system to individual users The main distribution line delivers this medium voltage power to the distribution transformer located near the customer's premises.

 Advantages of Electrical Equipment & Supplies



High-Precision

The products adopts special analog measurement protection algorithm, so that the system can calculate the most accurate line fault current, improve the accuracy of system protection, ensure the selectivity of system protection, protection precision can reach 0.5%.

 High Quality

The products adopt the mechanical and electronic control parts of international brands; The opening type of intelligent control system, rigorous and scientific management system; With multi-effect simultaneously, to ensure the quality of equipment effectively.

 Reliable

The products adopt an advanced design platform for dynamic simulation software, using advanced distributed technology and modular structure, open free communication protocol and other advanced technology, to achieve "reliable, steady, accurate, rapid”, makes the equipment well compatible with the protection of stability.

 High-Efficient

The CPU of the device adopts ADI processor, and the processor adopts ARM Cortex-M4 dual-core design, supports Thumb-2 ISA technology, DSP and SIMD expansion, single cycle MAC and 3-stage pipeline, to making the system of the device more efficiency and respond faster.

[gopower]

Vacuum Circuit Breaker

https://www.zhgopower.com/products/vacuum-circuit-breaker/

ZW32 series Breakers are used in distribution systems. Circuit breakers are used to make and break normal and fault currents. Breakers are fully equipped with sensors and a controller to provide a means of protection and control. In case of a line fault, breakers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults. The manufacture, design, and testing of the vacuum recloser are based on current standards IEC 62271-100.

 Application of Vacuum Circuit Breaker

ZW32-24/630-20 type circuit breaker is widely used in urban power grids or rural power grids as a section switch or contact switch, for outdoor substations of the rural power distribution system as an outlet switch, for 10kV system as a split and combined load current, overload current, and short circuit current protection.

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Remote Terminal Unit-RTU

https://www.zhgopower.com/products/remote-terminal-unit-rtu/.

BD-163 distribution automation remote terminal (hereinafter referred to as the distribution terminal) is a new generation of power distribution terminal based on the latest generation of automated remote terminal technology.

 Application of Remote Terminal Unit-RTU

Distribution Terminal Unit-DTU installation location: indoor and outdoor opening and closing station, power distribution room, knife lock chamber, box change, switch，it can detect line fault and overload status function, and can detect line zero sequence overvoltage, zero sequence overcurrent, line overload, line overcurrent, phase-to-phase short circuit protection, etc. It can be flexibly set to alarm and trip action. And record the fault event.

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Power Distribution Equipment

https://www.zhgopower.com/products/power-distribution-equipment/

The intelligent distribution transformer terminal is a distribution automation measurement and control terminal applied to 10kV line distribution transformers. It has the functions of monitoring the low-voltage side load and frequency of the distribution transformer, collecting power, and controlling the switching of capacitors.

 The intelligent distribution transformer terminal is a new type of terminal designed and developed by our company in response to the State Grid's comprehensive promotion of the "three types, two networks, world-class" strategic deployment. Low-voltage equipment, smart meters, and other equipment are connected to the intelligent distribution transformer terminal. After converging, intelligent distribution transformer terminals will be sent to the IoT platform. Smart distribution terminal is the basic terminal equipment for building a strong smart grid of ubiquitous power Internet of Things.

 How does a power distribution equipment work?

 Power Distribution Equipment has the functions of remote control, remote communication, remote adjustment, fault detection, and so on, and can communicate with remote distribution sub-stations, send the operation data of the distribution equipment to the distribution master station to realize remote monitoring, accept the control command of the distribution master station, control and adjust the intelligent terminal equipment, provide the distribution system operation and various parameters, namely the information needed for monitoring and control, to realize the functions of fault location, fault isolation and fast recovery of power supply in non-fault areas.

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Pole Mounted Switch

https://www.zhgopower.com/products/pole-mounted-switch/

The pole-mounted switch is a kind of safety switch used on the electric pole to ensure the safety of electricity. Its main function is to isolate the high voltage of the circuit. According to the arcing capacity of the contact, it can be divided into circuit breaker & load brake switch.

 How does a pole mounted switch work?

Load switch is a kind of switch equipment with a simple arc extinguishing device. The load switch that uses SF6 gas as insulation and arc extinguishing medium is called the SF6 load switch. It can be used for closing and breaking load current and overload current, or as for closing and breaking no-load circuits, no-load transformers and capacitor banks, all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price.

 .

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Distributed Type DTU

https://www.zhgopower.com/products/distribution-type-dtu.html

Features of Distribution Automation Terminal

 Distributed structure, it composed by several interval units and public units.

 The software platform adopts the powerful Linux operating system of real-time multi-tasking and multi-threading.

 Record the first 4 cycles of the faulty line and 8 cycles after the failure during the fault recording of the device, and record 64 points for each cycle. Use the device maintenance tool to perform detailed analysis on the recording files, and the waveform details can be seen at a glance.

 Miniaturization, each unit of the terminal adopts a small structure, and the structure is small and convenient for mass production and mass testing

 The installation is simplified, and the terminal adopts a unified and easy-to-plug interface, suitable for installation and replacement

 Large size LCD screen with 160*160 resolution, terminal operating conditions can be seen at a glance

 It has a variety of communication interfaces and a variety of standard communication protocols. In addition to the internal data management function, it can also forward the data of electricity meters, PLC and DC screen in the distribution room or on and off station, and complete the data transmission and other functions by communicating with the master station system through a standard unified interface

  Main Purpose of Distribution Automation Terminal

 Installed in conventional switching stations (stations), outdoor small switching stations, ring main unit, small substations, box-type substations, etc., to complete the position signal, voltage, current, active power, reactive power, and collection and calculation of electric energy and other data, etc., to perform opening and closing operations on the switch, to realize the fault identification and isolation of the feeder switch and the restoration of power supply to the non-fault section. Report the processing process and results to the main distribution automation station.

 Advantages of Distribution Automation Terminal

 Use miniaturized distributed DTU to transform the existing ring main unit, which greatly saves installation space and solves the problems of large installation volume, complicated wiring, and long power outage time and so on.

 It does not depend on the global information of the master station or the sub-station

 Fast processing and reliable action

 When the operation mode of the distribution line changes, the logic is adaptive.

 No need to reclose multiple times, reducing the impact on the equipment.

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Control Box-Feeder Terminal Unit

https://www.zhgopower.com/products/control-box-feeder-terminal-unit.html

The feeder terminal unit(FTU) is a new HV switch control device equipped with both the imported DSP high-speed sampling chips and the high-performance ARM chips, and can fast and stably finish the monitoring on the switch. It boasts of such functions as the protection, measuring, controlling, monitoring, communication, remote control, and so on and features high integration level, flexible configuration, and user-friendly interface, widely applied to the radiant and ring network power supply systems to help the systems identify transient and permanent line faults, eliminate the impact of transient line faults automatically, isolate the permanent fault segments to avoid prolonged power failure in a large area, and automatically recover the power supply in fault-free areas, so as to realize the automation of power distribution network in an economical and practical way.

 Key functions of Control Box

S/N

Functions

Remarks

1.

Three section protection

Each protection can be vote back independently

2.

Over-current count protection

Failure time count, output after meeting the number of

times, output mode is optional

3.

Zero-sequence protection

Output options: exit, alarm and tripping

4.

Pre - voltage fault protection

Protection can be accelerated when combined at fault

point

5.

Post-reclosing acceleration

Vote back independently

6.

Constant time-lag

The protection time is fixed

7.

Inverse time limit

Multiple protection curves optional

8.

Ring network protection

Hardware needs to configure double PT

9.

Event Log

The recording time is exactly millisecond

10.

Status enquiry

The main content is remote control and remote

metering

11.

Remote programmable

Remote input support programmable

 Communication protocols of Control Box

S/N

Protocols

Remarks

1.

IEC60870-5-101 balanced

 2.

IEC60870-5-101 unbalanced

 3.

IEC60870-5-104

 4.

DNP3.0

Now support level 3

5.

Modbus

  Technical Parameters of Control Box

No.

Items

Rated value

Remarks

1.

Operating ambient temperature

-40 ~ +85℃

 2.

Environmental relative humidity

10 ~ 100%

 3.

Maximum absolute humidity

35g/m3

 4.

Atmospheric pressure

66~ 108kPa

 5.

Working voltage

AC220V±20%

 6.

Working voltage frequency

50HZ±5HZ

 7.

Power consumption

≤15W

 8.

Protective exit time

<35ms

Protect inherent action time at 1.5 times fixed value

9.

Insulation impedance

>100MΩ/ DC500V

1.External terminal to ground

2.Power circuit to ground

3.On-off input circuit to ground

4.Output circuit to ground

5.AC circuit to ground

6.AC circuit and power circuit

7.Between on-off input circuit and output circuit

10.

Power frequency withstand voltage

2k

Power circuit to ground

500

On-off input circuit to ground

500

Output circuit to ground

2k

AC circuit to ground

2k

AC circuit and power circuit

1500

Between on-off input circuit and output circuit

11.

Impulse withstand voltage

5k

Power circuit to ground

1k

On-off input circuit to ground

1k

Output circuit to ground

5k

AC circuit to ground

5k

AC circuit and power circuit

1k

Between on-off input circuit and output circuit