Three Phase Mechanicalel Ectronic Sectionalizer

The three phase mechanical electronic sectionalizer is a high-voltage switchgear independently developed by our company to meet domestic and overseas market demands and adopt the latest international technologies. It is applicable to three-phase AC power systems with rated voltages ranging 15 kV and rated frequency of 50/60 Hz. As an automatic protective switch, it coordinates with reclosers (or circuit breakers equipped with autoreclosing functions) to automatically isolate faulty line segments while maintaining normal power supply to fault-free sections. The sectionalizer features memory and reset functions，memory time is the duration during which the sectionalizer records the number of fault current occurrences, reset time is the time required for the sectionalizer to restore to its initial pre-counting state after each counting cycle. Upon line faults, the sectionalizer distinguishes between transient and permanent faults. When preset conditions are met, it automatically trips via cutout action to isolate faulty segments, ensuring continuous power supply to unaffected line sections and enhancing overall power supply reliability.

After closing the sectionalizer with an operating stick, the electronic controller inside the sectionalizer starts counting once the line current exceeds the set pickup current. When the upstream switch trips and the line loses load current, and the preset counting cycles (1, 2, 3 or 4) are completed, the controller outputs an actuating signal to energize the mechanism coil. The coil drives the moving armature of the pre-charged energy storage mechanism to release the trip detent, triggering tripping. The conductive assembly drops down to isolate the faulty line segment. The recloser (or autoreclosing circuit breaker) then successfully recloses to restore power to fault-free sections, confining power outages to the minimal scope and ensuring normal operation of healthy feeders. In case of a transient fault, the sectionalizer will revert to its pre-fault initial state upon expiry of the memory time.

1. Ambient temperature: -40℃ ~ +60℃.

2. Altitude: 2000 m maximum.

3. Wind pressure: not more than 700 Pa.

4. External insulation pollution class: Class IV.

5. Ice coating thickness: not exceeding 1 mm.

The SO series sectionalizer supports USB configuration mode (the factory default) and DIP switch mode. Open the cover plate with a tool, and a red DIP switch can be observed inside the device, it is equipped with five white slide toggles on its surface. As shown in the figure

1. USB Mode (Default, SW3/SW4/SW5 combination)

SW3=OFF, SW4=OFF, SW5=OFF

2. Count Function (Effective in non-USB mode, 4 options. SW1/SW2 combination)

Count 1 time: SW1=OFF, SW2=OFF

Count 2 times: SW1=OFF, SW2=ON

Count 3 times: SW1=ON, SW2=OFF

Count 4 times: SW1=ON, SW2=ON

3. Gear Mode (7 Gears, SW3/SW4/SW5 combination)

Gear 1: SW3=OFF, SW4=OFF, SW5=ON

Gear 2: SW3=OFF, SW4=ON, SW5=OFF

Gear 3: SW3=OFF, SW4=ON, SW5=ON

Gear 4: SW3=ON, SW4=OFF, SW5=OFF

Gear 5: SW3=ON, SW4=OFF, SW5=ON

Gear 6: SW3=ON, SW4=ON, SW5=OFF

Gear 7: SW3=ON, SW4=ON, SW5=ON

Use the Drop-out Sectionalizer Config Tool for gear-related parameter setup, usage instructions are provided in the subsequent chapter.

1. Double-click to launch the Drop-out Sectionalizer Config Tool, then enter your username and password. The default username is admin and the default password is 123. Chinese or English language can be selected on this interface simultaneously. As shown in the figure below:

2. The maintenance tool consists of four menu tabs: Setting, Status, Test and About. The setting menu contains Parameters (Home Tab), Change Password, Frequency Setting and Language Switch options. The Event tab is used for viewing the report. The Status tab is used for viewing real-time operating status. The Test tab contains items for device testing and message viewing. The About tab displays the software versionnumber and brief operating instructions.