FZW28-12F outdoor high voltage dividing vacuum load switch

Features

1.Automatic interphase short circuit fault blocking: When the same short circuit fault occurs in the user's branch line, the boundary switch will be immediately opened and locked after the substation circuit breaker or recloser protection trips. After the substation is reclosed, the power supply to other branch users on the feeder line will be quickly restored;

2.Quickly locate the fault point: After the boundary switch protection is activated due to a branch line accident, the responsible user will be cut off from power and will take the initiative to report the accident information. The power company's personnel can use a handheld computer or communication module to investigate the cause of the accident on site;

3.Automatically cut off single-phase grounding fault: When a single-phase grounding fault occurs in the user's branch line, the boundary switch automatically opens;

4.other branch users on the substation and feeder line cannot feel the occurrence of the fault. This switch can realize the following functions: quick-break protection, overcurrent protection, three-time reclosing, event recording, anti-surge protection, zero-sequence protection, real-time clock, acceleration after reclosing, real-time status query, intelligent handheld computer control, local/remote setting of fixed values, active fault reporting, and GSM short message function.

Usage Environment

◆Ambient air temperature: upper limit +40℃, lower limit -40℃;

◆Relative humidity: daily average value is not more than 95%, monthly average value is not more than 90%:

◆Altitude: ≤3000m;

◆ Wind pressure: no more than 700Pal (equivalent to wind speed 34m/s):

◆Pollution level: Level Ⅳ(creepage distance> 31mmvkV);

◆Ice thickness: ≤ 10mm

◆Neutral point grounding method: neutral point not grounded, neutral point grounded through arc suppression coil, neutral point grounded through low resistance.

Technical Parameters