TBP, YH Series Three-Phase Combined Overvoltage Protector

Overview

Due to some particularities of my country's medium-voltage resistors (3~66kV), conventional medium-voltage arresters are not sensitive to overvoltage in this type of operation and cannot provide protection. TBP three-phase combined overvoltage protector (also known as YH three-phase combined arrester) is a new product developed to solve this problem.
This type of product adopts a four-star connection (commonly known as a three-way connection) and sets a common neutral point, which can not only greatly reduce phase-to-phase overvoltage, but also qualitatively improve the relative-to-ground protection level, which truly plays a role in the vacuum switch operation. Effective limitation of overvoltage.
Our company's products are composite insulation, with small and compact structure, and are integrally vulcanized and fully enclosed. It adopts high-quality metal oxide valve plate and self-blowing special gap, which has high working performance, safety and convenience. It is especially suitable for use with different types of medium-voltage complete switch cabinets such as KYN, XGN, GBC, JYN, GZS, etc., or directly installed in small box-type substations.

Purpose and implementation standards

This product is used in AC medium voltage 3~66KV power systems to prevent operating overvoltage mainly generated by vacuum switches from damaging electrical equipment. It also has the function of lightning protection.
Our company's product technical standards mainly refer to GB 11032-2000 "AC Integrated Metal Oxide Surge Arrester", JB/T 9672-2005 "Surge Arrester for Metal Objects with Series Gap" and DL 620-1997 "Overvoltage Protection and Protection of AC Electrical Devices" "Insulation Cooperation" standard is formulated and implemented in accordance with JB/Factory 10496-2005 "AC three-phase combined gap metal oxide arrester" and JBT 10609-2006 "AC three-phase combined gap metal oxide arrester".

Conditions of Use

3.1 The normal usage conditions of conventional products are as follows:
1) Ambient temperature: not higher than +40C, not lower than -40C;
2) Altitude: no more than 3000m;
3) Power frequency: 502Hz; 602HZ;
4) Maximum wind speed: 35m/s;
5) Cleaning-free conditions: moderately dirty areas and below;
6) For products without gaps, the long-term applied power frequency voltage shall not exceed the continuous operating voltage of the protector;
7) For products with gaps, the short-term power frequency voltage increase at the installation point shall not exceed the rated voltage of the protector.

3.2 For long-term use under the following abnormal conditions, the protector needs to be specially made and should be stated when ordering:
1) The temperature or altitude exceeds the standard (such as plateau, tropical, cold zone, fully enclosed cabinet, close to electric furnace, etc.);
2) The use environment contains severe moisture or corrosive gas impurities (such as water, salt fields, chemical plants, etc.)
3) Strong ultraviolet radiation (such as plateaus, dry areas with strong sunshine, etc.);
4) Extremely polluted areas (such as mining working faces, construction site working faces, etc.).

Model definition

There are no strict national standard definition rules for this product. Currently, each manufacturing company defines its own product according to the model applied for by the National Testing Center. The product models of each company vary greatly for the same purpose. Manufacturers that have not yet obtained the type certification certificate usually refer to the general provisions of JB/T 8459-2006 "Method for Preparing Surge Arrester Product Models" for extended definitions.
The national certification model of our company's products is TBP, and its model is defined as follows:

At the same time, this product can also be expanded and defined according to the compilation principles of JB/T 8459-2006 "Product Model Compilation Method of Lightning Arrester". The specific model definition is as follows: