General
As a special supporting product for arrester, the disconnector is series connected with arrester. When the arrester comes across any fault, it would operate quickly and let the failed arrester disconnect from the power grid, meanwhile, it would give obvious disconnection symbol, so that the maintenance personnel would find the point of failure and change the arrester in time. On the other hand, when the arrester works normally, disconnector does not work and is under low impedance state, it would not affect the protective characteristics of arrester. The arresters that have been equipped with disconnectors really realize safe operation, maintenance free, convenient and reliable performance. It is popular to use disconnectors for distribution type, power station type and line type arresters in power grid in Japan, Occident countries and other developed countries and districts.
The disconnectors produced by our company adopt the latest thermal-explosion design, with advantages of fast response and misoperation free, can be equipped with arresters of various models of 3kV above, having the same operating conditions with that of arresters.
Typical Ampere-Second Characteristic Parameters Of Disconnector
| Current (A) | 800 | 200 | 20 | 5 | 0.5 | 0.05 |
| Operation times (s) | 0.01-0.02 | 0.02-0.05 | 0.1-0.2 | 0.5-1.0 | 20-50 | 200-600 |
Outstanding Advantages
A. Wide range of operating current
Considering the features of power networks in china, disconnection available not only under heavy power frequency fault current (>50A) but also under light fault current(50mA)
B. High disconnection speed
Supportable with the reclosing function of the disconnector, not only applicable for various types of arrester on all voltage grades but also for all types of earthing systems(neutral earthing and non-earthing systems)
C. Strong impulse resistance abilities
Not operating under the square wave of 2ms and heavy current of 4/10μs
D. High mechanical strength and sealing performance before blasting
TLB-5 type can match with arresters of 35kV or below.
TLB-6 type can match with arresters of 35~220kV.
E. Easy installation and replacement
Screw-thread external interface, reliable and convenient serial connection with arrester, extremely easy for replacement of disconnector after operating
Installation Schematic Diagram of Disconnector
Note:
1. See above diagram for conventional mounting mode of disconnector, other mounting methods also can be used for special conditions according to the actual conditions.
2. Please refer to our operating manual of disconnector for detailed description and direction of disconnector. “L” followed the standard model means that the arrester has been equipped with disconnector. For example, YH5WS-17/50-L means that the arrester YH5WS-17/50 has been with disconnector.
