overview

With the increasingly widespread use of vacuum switches, the various operating voltages caused by their strong breaking ability pose new challenges for the protection of power equipment. Due to the medium voltage power grid in our country（3~66KV）Due to some special characteristics, conventional medium voltage lightning arresters are not sensitive to overvoltage during such operations and cannot provide protection.TBPThree phase combined overvoltage protector (also known asYHThe three-phase combination lightning arrester is a new product that has emerged to solve this problem.

This product adopts the four type connection method (commonly known as the trident connection method) and sets a common neutral point, which not only greatly reduces the phase to phase overvoltage, but also improves the relative ground protection level, truly effectively limiting the overvoltage during vacuum switch operation.

Our company's products are composite insulation, with a compact and compact structure, and are fully enclosed by vulcanization molding. High quality metalized valve plates and self blowing special clearances are selected, which have high working characteristics, safety and convenience. Specially applicable andKYN、XGN、GBC、JYN、GZSSuitable for use with different models of medium voltage switchgear, or directly installed in small box type substations.

Purpose and execution standards

This product is used for communication purposes3~6KVVoltage system, used to prevent operational overvoltage mainly generated by vacuum switches-The infringement of power equipment, while also having the function of lightning protection.

This product is a new technology product, and the corresponding national standards are still being formulated. Only a part of them have been released. Our company's product technical standards mainly refer toGB11032-2000Communication without Gap Metal Oxide Mineral Surge ArresterJB/T9672-2005Metal oxide surge arresters with series gapDL/T620-1997The standard "Overvoltage Protection and Insulation Coordination for Voltage Protection of AC Electrical Devices" has been formulated and implemented in accordance with the existing regulationsJB/andT10496-2005The revised draft of the standards for "Three phase combination type gapless metal oxide lightning arrester" and the yet to be released "Three phase combination type series gap metal oxide lightning arrester" will be implemented.

All the overvoltage protection products produced by our company according to the above standards have been approved16Conduct type tests and obtain authoritative form test certificates（2004Avoid it87、88Number), and received the model certificate（GXB-006-2005，GXB-007-2005Number).

*For gapless products, the long-term applied power frequency voltage shall not exceed the continuous operating voltage of the protector:

*For products without gaps, the short-term increase in power frequency voltage at the installation point shall not exceed the rated voltage of the protector.

The protector needs to be specially made for long-term use under the following abnormal conditions, and should be specified when ordering:

*Temperature based altitude exceeding the standard (plateau, tropical, cold zone, fully enclosed cabinet, near electric furnace, etc.):

*The usage environment contains severe moisture or corrosive impurities (such as water, salt fields, chemical plants, etc.):

*Strong infrared radiation (in high-altitude and arid areas with strong sunlight, etc.):

*Areas with severe pollution (such as mining and construction sites):

Model definition

There is currently no strict national standard definition rule for this product,The model of the company's product isTBPThe model definition is as follows:

additional function—J: Counter IMMonitoring instrument

Usage environment—N: Only for use inside the cabinet GY: Plateau type

INIndoor use (or not specifically indicated)

WIOutdoor use with cable W2Outdoor use without cables

Interphase distance（85、131、200、310、630Etc.)

structural style--FComposite jacket sealing gap, noFIndicating no gap

I: Rectangular base T：TType base

IIRectangular base (or not specifically indicated)

Characteristic voltage（KV）--There is a gap in the rated voltage of the product label3.8、7.6、12.7、42four types

Gap free product label system voltage, with3、3.15*、6、6.3*10、10.5*35seven kinds

have*Number is the rated voltage of the motor)

Protecting objects—AMotor model C: Capacitive type

B: Universal type for power station and distribution

tbp

At the same time, this product can also be pressedJB/T8459-1996The compilation principles of the "Method for Formulating Lightning Arrester Product Models" have been expanded and defined, and the specific model definitions are as follows:

additional function—J: Counter IMMonitoring instrument

Relative characteristic numbers（kV）--rated voltage/Nominal residual voltage

Relative phase characteristic number（kV）--rated voltage/Nominal residual voltage

Design serial number (customized by the manufacturer)

Place of use—SFor power distribution purposes ZFor power plants

R: For capacitors D: Used for motors

structure characteristics—W: No gaps BParallel gap

CObstacle gap

Nominal discharge current（kA）

Composite jacket, metal oxide