Yueqing Dengrui Electric Co., Ltd.

Yueqing Dengrui Electric Co., Ltd. supplies combined overvoltage protectors. Combined overvoltage protectors are on sale at special prices. If you are looking for a manufacturer of combined overvoltage protectors, choose Dengrui Electric. Please call us for details! The following is a detailed introduction to the combined overvoltage protector
The combined arrester is also called a three-phase overvoltage protector. The combined overvoltage protector is a unique structure of overvoltage protector developed by our company. Widely used in and below power systems. It is an ideal protection device for transformers, motors, parallel compensation capacitors, busbars, vacuum switches and other electrical equipment in power systems from atmospheric overvoltage, operating overvoltage, especially phase-to-phase overvoltage. This product uses silicone rubber as the shell material and is molded in one go. The zinc oxide valve piece is directly hot-pressed with the shell material. There is no cavity around the valve piece, which fundamentally solves the problem of moisture and explosion-proof sealing of zinc oxide arresters. The company also produces current transformer overvoltage protectors, line overvoltage protectors, cable overvoltage protectors and other three-phase combined overvoltage protectors, which are widely used in power, metallurgy, chemical industry, coal, light industry, construction, electrified railways In other industries, it mainly protects transformers, parallel compensation capacitors, motors, switches, busbars and other electrical equipment in power systems from atmospheric overvoltage and operating overvoltage, especially phase-to-phase operating overvoltage.
The combined overvoltage protector has the following main features
1. The zinc oxide valve plate is directly molded using silicone rubber as the shell material, and there is no cavity around the valve plate. This structure not only fundamentally solves the problem of moisture and explosion-proof sealing of zinc oxide arresters, but also greatly improves its performance and has an average service life of more than 10 years.
This product has two structures: non-gap and gap. The gap type uses special electric porcelain material as the electrode support, which fully ensures the requirements of gap discharge on dielectric materials, electrode contact methods, humidity, etc. It not only effectively suppresses slip and flash, but also ensures the stability of discharge. At the same time, the impact coefficient is , and the discharge voltage values under various voltage waveforms are equal.
. The three-phase combined overvoltage protector uses flame-retardant and aging-resistant silicone rubber as the shell material. Four silicone rubber high-voltage cables and zinc oxide valve plates are led from the inside and are integrally vulcanized and molded at one time, so its electrical It has good insulation performance, high dielectric strength, resistance to electric corrosion and aging, and is small in size and easy to install. There is no need to consider the phase distance and creepage distance, and it can be installed flexibly according to the site conditions.
This product uses large-capacity zinc oxide resistor sheets, which can ensure the safe release of energy during overvoltage operation.
This product model is compiled in accordance with the standard requirements of the "Method for Preparing Lightning Arrester Product Models".
This product is fully sealed, made of silicone rubber high-voltage cable and zinc oxide and integrally vulcanized at one time. The cable length is , and the wiring nose diameter is Ф. If the user has special requirements, please indicate it when ordering.
Applicable conditions and ordering instructions for combined overvoltage protector
Applicable conditions for overvoltage protector
Suitable for indoor and outdoor use
Ambient temperature ℃～+ ℃
Altitude does not Exceeding meters
The wind speed does not exceed/second
The power frequency is not less than, not greater than
The power frequency voltage applied to the protector for a long time does not exceed its continuous operating voltage.
Prevention and detection of combined overvoltage protector
In order to prevent damage to the product due to unexpected factors, before putting the three-phase combined overvoltage protector into operation, users should conduct preventive tests and test every four Annual periodic testing.
The testing content of gap type overvoltage protector is mainly power frequency discharge test, the details are as follows
. The experiment should be carried out between phases and between phases and ground. The number of measurements is three times. The time interval between each two tests should not be less than 1. The power frequency power supply should be cut off within .
． During the test, one or more ammeters can be connected in series to the primary side of the test transformer, and the ammeter can be observed. When the current suddenly changes, it indicates that the sample has been discharged, and the voltage value at this moment should be the power frequency discharge voltage value. If there are conditions on site, the pulse discharge voltage value can be read directly through the high-voltage side.
The gapless overvoltage protector mainly tests DC and . times leakage current values, which should be within the specified range.
Models of series overvoltage protectors
Corresponding models of overvoltage protectors Overvoltage protectors
./ . Neutral overvoltage protectors. ./Corresponding models of overvoltage protectors./< br/> This information supplies combined overvoltage protectors. The special sales of combined overvoltage protectors are provided by Dengrui Electric. Product description information is subject to change without notice. For details, please log on to the official website of Yueqing Dengrui Electric Co., Ltd. or call Subject to consultation