An overview,

Surge arrester with disconnector is one of the types of surge arrester in attachment, and lightning arrester series are used. The abnormal failure, its purpose is when lightning arrester in the use of lightning arrester through the power frequency of short circuit current to the disconnector action, make the grounding end of the disconnector automatic release, lightning arrester exit system operation, to prevent the accident further expands, and fault arrester is given by the separation of the visibility of identity, is advantageous for the maintenance staff to find fault point for maintenance and replacement. When the normal work of the arrester, from present ac conducting state and shall not affect the system working status and the protection of the arrester characteristics, to ensure the normal operation of the system, and makes the lightning arrester to obtain the real use of "maintenance". Due to the excellent characteristics of the disconnector, in foreign countries, such as Europe and the United States, Japan and southeast Asia countries and regions, the power grid operation of various types of surge arrester, has been supporting the use of common disconnector. With the high-speed development of national electric power construction and safety requirements of power system, has been in power generation, power station, railway, civil aviation, communications, mining and other important place of power supply, also has gradually promote the use of the disconnector.

From the device by using the principle and performance can be divided into hot melt type disconnector and heat explosion type disconnector, hot melt type disconnector use through the failure of lightning arrester short-circuit current, power frequency make the disconnector in gold from melting fusing to to achieve. Heat explosion type the disconnector is used through the failure of the lightning protection power frequency arc short circuit current in the disconnector, detonation heat explosion elements to achieve out of purpose.

Company produces the disconnector performed by standard GB********0 exchange non-clearane metal oxide surge arrester and IEC. The C*2 distribution arrestor disconnector requirements. The use of the disconnector environment requires the same as the lightning arrester.

Second, the product features

1, the heat explosion type from the device

Power grid in our country, more than *5 kv and below power system for neutral point is not effective grounding system, the effective directly with foreign neutral grounding system, lightning arrester fault current is small current more, in view of the characteristics and draw lessons from foreign companies (such as the United States GE company, Sweden ABB, Germany Siemens and other famous companies) the advantages of the disconnector heat explosion type, developed the RBT - 3, efficient new disconnector RBT - 4 type, it has the following features:

A, current action range: combined with the characteristics of power grid itself in China, either in large power frequency under the fault current (> *0 A) from, can also be down in the small fault power frequency electric (*0 ma);

B, fast out: to match the reclosing of circuit breaker function, not only are suitable for all kinds of voltage grade and various types of lightning arrester, and use different grounding systems (neutral point grounding system and the neutral point is not effective effective system).

C, high mechanical strength, good sealing performance, the disconnector in action before blasting off high mechanical strength, good sealing performance. RBT - 3 tensile strength > ***0 n, RBT - 4 tensile strength > ***0 n, RBT - 3 the disconnector can be used with below *5 kv surge arrester, RBT - 4 the disconnector can be used with *5 ~ **0 kv surge arrester.

E, easy to install and replace: the disconnector adopts screw type external interface, and lightning arrester series is very convenient and reliable, the disconnector once the change is very convenient, save time and effort.

2, hot melt type

Disconnector using hot melt type lightning arrester through the failure of short-circuit current, power frequency make the disconnector in low temperature alloy melting fuse (fuse) to achieve from the purpose, so hot melt type disconnector from the disconnector long time heat explosion type, *0 ma ~ 5 a from of 0.8 ~ 1.9 min. But when the disconnector from hot melt type, which does not produce explosion sound, no explosion vibration and debris, don't have any effect to the installation environment.