Solid LBS and Eco-LBS — vacuum load break switches for 25.8 kV overhead lines with solid insulation
Solid LBS and Eco-LBS are three-phase vacuum load break switches from the manufacturer with solid epoxy insulation for 25.8 kV overhead lines. They replace gas-insulated LBS in 22.9 kV networks and work as auto-sectionalizers and tie points in loop automation.
- Rated voltage
- 25.8 kV (22.9 kV networks)
- Rated current
- 630 A (Eco-LBS)
- Short-time withstand
- 12.5 kA, 1 s
- Making capacity
- 32.5 kA (peak), 5 times (Eco-LBS)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The company makes Solid LBS and Eco-LBS as a replacement for SF6 gas-insulated load break switches on 25.8 kV overhead lines in 22.9 kV distribution networks. The devices contain no gas. The insulation is epoxy resin and the current is switched by built-in vacuum interrupters, so SF6 leak monitoring and refilling are no longer needed, and neither is the risk of a pressurized tank exploding. The tank and control cabinet of both models are made of stainless steel.
Solid LBS has a spring-operated toggle mechanism. The bushings of hydrophobic cycloaliphatic epoxy resin HCEP resist contamination, tracking, ultraviolet and vandalism, and the creepage distance meets ANSI requirements. Frequency is 50/60 Hz, short-time withstand current is 12.5 kA for 1 s, and making capacity is 32.5 kA. The declared life with the built-in vacuum interrupter is 5000 operations, and up to 10 000 for the motorized version. Bushings with a terminal or with a cone are available as an option.
The motorized unit is equipped with an ETMFC610 controller with a built-in RTU. It measures voltage and current of the three phases, kW, kWh and power factor, keeps a load profile, records waveforms, assesses power quality, and counts operations and contact wear. Communication is over RS232, RS485 and TCP/IP using DNP3.0, MODBUS, IEC 60870-5-101/104. In loop automation schemes the switch works as an auto-sectionalizer or a tie point.
Eco-LBS has vertical bushings with the creepage distance extended to 645 mm and a phase-segregated design in which a three-phase short circuit is excluded. Rated current is 630 A, voltage and current measurement error is 1.0 %, making capacity is 32.5 kA (peak) five times, and impulse withstand voltage is 150 kV. Weight is 97 kg, more than 50 % less than a gas-insulated LBS. HV busbars are connected with clamps instead of lead wires. The toggle mechanism is manual or automatic with digital control and a built-in FRTU. Control circuits are supplied from 220 V, 60 Hz, and the auxiliary supply is 24 V DC.
Both models have passed type tests at KEMA, CESI or KERI to IEC 62271-103. Eco-LBS is used for sectionalizing and automation of 22.9 kV overhead lines, including salt-laden areas and sections with industrial pollution.
Technical specifications
| Rated voltage | 25.8 kV (22.9 kV networks) |
|---|---|
| Rated current | 630 A (Eco-LBS) |
| Short-time withstand | 12.5 kA, 1 s |
| Making capacity | 32.5 kA (peak), 5 times (Eco-LBS) |
| Impulse | 150 kV (Eco-LBS) |
| Creepage distance | 645 mm (Eco-LBS) |
| Life | 5000–10 000 operations |
| Weight | 97 kg (Eco-LBS) |
| Controller | ETMFC610 (RTU, DNP3.0, MODBUS, IEC 60870-5-101/104) |
| Standard | IEC 62271-103 |
Request a price and lead time
Solid LBS and Eco-LBS — vacuum load break switches for 25.8 kV overhead lines with solid insulation. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8535 30 10 00 |
|---|---|
| HS, 6 digits | 8535 30 |
| CN (EU) | 8535 30 10 |
| HTSUS (USA) | 8535 30 00 80 |
| China customs tariff | 8535 30 00 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What network are Solid LBS and Eco-LBS intended for?
The rated voltage of the devices is 25.8 kV, and they are installed on overhead lines of 22.9 kV distribution networks. The rated current of Eco-LBS is 630 A.
How many operations does the switch withstand?
Solid LBS with a built-in vacuum interrupter is rated for 5000 operations, the motorized version for 10 000. Type tests were carried out to IEC 62271-103.
How does Eco-LBS differ from a gas-insulated LBS?
It contains no gas, the insulation is epoxy and the creepage distance is 645 mm. Weight is 97 kg, which is more than 50 % less, and the phase-segregated design excludes a three-phase short circuit.
Similar equipment from other manufacturers
