Hughes' TVS series of time-voltage sectionalizers is designed and manufactured in Sweden for use in overhead distribution lines and as an advanced Smart Grid building block.
 

The TVS sectionalizer purpose is to automatically clear faults with very short interruptions.

THE TVS SECTIONALIZER types:

• TVS sectionalizer for diconnectors;
• TVS sectionalizers for load break switches;

TVS SECTIONALIZER FOR A LOAD BREAK SWITCH MODEL RANGE:

• TVS120 for 6/12kV has the LBS120 vacuum load break switch equipped with 12kV bushings and a built-in disconnector;
• TVS121 for 6/15kV has the LBS121 vacuum load break switch equipped with extra insulated 27kV bushings and optional set of voltage sensors on feed side;
• TVS240 for 22/27kV has the LBS240 vacuum load break switch equipped with 24kV bushings;
• TVS241 for 22/27kV has the LBS241 vacuum load break switch equipped with extra insulated 27kV bushings and optional set of voltage sensors on feed side;
• TVS405 for 33/40kV has the LBS405 vacuum load break switch equipped with ABB VG10 2000A/20kA 40.5kV vacuum interrupter and voltage sensors on the load side;

The TVS time-voltage sectionalizer of the latest generation has the following advantages:

• Low maintenance. Hughes sectionalizers are built to remain in operation for more than 30 years without major maintenance due to the highest quality materials used in its construction. 
• Low initial investment cost. AutoSelf operates without protection relay, fault pass indicator and radio, as open/close operation and monitoring are performed automatically  without the need of remote control and communications;
• Long operational life time. Up to 20,000 interruptions (one of the longest operating life on today’s market) of the well proven LBS load break switch;
• AutoSelf can make and break short‐circuit currents if needed, both electronically and mechanically;
• Optimized operation. In order to save service life of the AutoSelf and ensure the immediate restoration of the power supply, the AutoSelf operates from the second reclosing cycle. Almost 82% of transient faults are cleared during the first reclosing cycle, that is why the AutoSelf operates only from the second one;
• Unlimited number AutoSelf’s can be installed with an downstream recloser in the trunk line or branches of the overhead line to sectionalize the network in small sections;
• Simple setup. AutoSelf only uses a LBS vacuum load break switch and a TVS150 control unit that contains the time‐voltage sectionalizing logic without complex protection.
• Fast restoration. When the fault is cleared, the AutoSelf unit down streams automatically closes with the incoming line voltage (if the reclaim time is not exceeded). There is no need to manually or remotely close the AutoSelf;
• Easy upgrade. Hughes AutoSelf can be easily upgraded to a recloser;

lbs vacuum LOAD BREAK SWITCH
The LBS series is a modular building system, enabling to build easy tailored switches for different qualified solutions.

The basic LBS has the following components:

• Bushings and insulators (1) with solid epoxy insulation. Silicon coating provides UV protection, is environmentally friendly, does not contain harmful SF6 gas or oil;
• Frame (2) made of 5 and 4mm highest quality stainless steel to minimize electrochemical corrosion. The use of stainless steel in accordance with DIN50049 / 3.1B, thanks to its non-magnetic properties, completely eliminates the occurrence of any kind of corrosion, including electrochemical corrosion over the entire life of the product;
• Electrical circuit (3) made of high grade copper; 
• Attachment points (4) for down pole mounted disconnector operation handle;
• Spring stored energy operating mechanism (5). It provides turning On and Off the switch module even in the complete absence of power supply (voltage transformer malfunction, full battery discharge). 
• Manual maneuvering (6) of LBS. Manual charging of the spring mechanism as well as switch operation On and Off are possible with the help of maneuvering arms located on a switch body. The spring capacity is enough for the full reclosing cycle (Off - On - Off) without recharging;
• Disconnector switch (7) gives visible open points of all three phases for extra safety. The disconnector (for LBS120 and 240 only) is synchronized with the vacuum interrupter and cannot be open or closed when the vacuum interrupter is closed;

Optional components:

• 1 set of voltage sensors (8) can be installed on feed side (for LBS121 and 241) or on load side (for LBS405);