TVS time - voltage sectionalizer (Autoself TM) is a control system, including the control cabinet and a disconnector or a load break switch. It can be connected to the most existing switch elements in the network. The Autoself has the same purpose as a recloser but utilizes a much simplier sectionalizing algorithm. The product's reliability has been proven for more than 30 years of operation in electrical distribution networks. 

Hughes Power System Time Voltage Sectionalizer
  • Non-enclosed switch for extra safety
  • Integrated air break switch for personal safety
  • Operation On and Off with full load without electric power
  • Follows the feeding substations reclosing sequence
  • Easy installation
  • Frame of "Marine grade" premium stainless steel


Hughes TVS405 series of sectionalizer is designed for use on overhead distribution lines with the voltage range 33-40kV as an advanced Smart Grid building block.

The tvs405 series for a load break switch model range:

  • TVS405 model has the LBS405 vacuum load break switch equipped with ABB VG10 2000A/20kA 40.5kV vacuum interrupter and voltage sensors on the load side;
Hughes sectionalizer


The tvs405 SECTIONALIZER set for a load break switch includes: 

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Hughes sectionalizer

The LBS405 vacuum load break switch components:

  • ABB VG10 2000A/20kA 40.5kV vacuum interrupter (1);
  • Integrated 3x phase current transformers (2);
  • Integrated voltage sensors on load side (3);
  • Frame (4) made of 5 and 4mm stainless steel to eliminate electrochemical corrosion;
  • Electrical circuit (5) made of high grade copper;
  • IP67 Control cable contact (6);
  • Manual maneuvering (7) of vacuum interrupter;
  • Spring stored energy operating mechanism (8);
Hughes sectionalizer


  • Rugged mounting brackets (1) for different pole types;
  • New! Grounding system cable theft alarm (2). See details here;
  • Antenna set for GSM/4G including: antenna, multi band professional glass fibre rod; pole mounted bracket for antenna; antenna cable 8M RG-213 N-N professional connectors and surge arresters for antenna N-N connectors;
  • Voltage transformer for 33/38kV, phase to phase connected, epoxy insulated with pole mounting brackets;
  • Insulations transformator 230/230 VAC
  • Surge arresters (3) for 33/38kV with mounting brackets;
  • Drop out fuses (4) for 33/38kV with mounting brackets;

Complete list of accessories is here.

Hughes sectionalizer

Hughes sectionalizer


The TVS405 model of sectionalizer can be installed on one wooden or concrete pole or between 2 poles.

The standard installation includes below elements in the following sequence:

  • Voltage transformer (1)
  • Vacuum load break switch (2)
  • Interconnecting cable (3)
  • Control cabinet (4)
Hughes sectionalizer

TVS405 can be installed as one of the blocks of a sectionalizing scheme.
The installation includes below elements in the following sequence:

  • Voltage transformer (1)
  • Vacuum load break switch (2)
  • Control cabinet (3)
Hughes sectionalizer


Description LBS405
Rated operation voltage, VDC 24-48-110
Rated maximum voltage, kV 40
Rated basic impulse level, P>P, kV 185
Rated basic impulse level, P>E, kV 170
Power frequency withstand 50/60Hz, Dry, kV 70
Power frequency withstand, Wet, kV 60
Rated power, W 40
Rated continuous current, A 1200
Rated fault making current, kA 42
Rated fault breaking current, kA 16
Rated fault duration time, s 3
Line charging current, A 5
Cable charging current, A 40
Contact resistance, VCB, µΩ < 40
Network frequency, Hz 50/60
Description Winding 1
Design min mechanical/electrical 15.000
Dimensions (LxWxH), mm 1470x621x1070
Mass (weight), kg (lbs) 155 (342)
Operating temperature C -45 - +70
Humidity 100% at 25 C
Enclosure IP55-65, non-magnetic stainless steel, optional painted in RAL or ANSI colour
Bushing type Hydrophobic Cycloaliphatic Epoxy (HCEP)
Phase to phase distance, mm 550
Creep distance to ground (interrupter isolator), mm 1310
Max installation altitude at rated BIL, m 3000
Design specification IEC 62271-100
Marking specification IEEE std C37.60
Operation sequence, no charge 25 ms trip - 50 ms close - 25 ms trip

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  • Recloser controls
  • Time-voltage sectionalizers
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  • Indoor vacuum circuit breaker
  • Outdoor vacuum circuit breaker
  • Vacuum load break switches
  • Сontrol units for vacuum circuit breakers
  • High voltage circuit breaker