12kV Pole Mounted SF6 Gas Insulated Sectionalizer

12kV Pole Mounted SF6 Gas Insulated Sectionalizer

Salient Features

  • Compact in size, light weight design, hence easy to install and transport
  • SF6 gas filled hermetically sealed stainless steel tank
  • Control Unit with logic based programming
  • Suitable for mounting on a single pole or on double pole structure
  • Latest technology of arc quenching & short arcing time
  • Local & Remote control options
  • Manual & automated options
  • Least maintenance


Sectionalizer is installed in different branch/line in a power distribution system especially in ring main type distribution system. It has been observed that about 70% of faults in power distribution system are Transient Faults (i.e. short-time faults) which get cleared within mille-seconds. The upstream Autorecloser, through a number reclosing operations with a definite interval of times determines the type of the fault (transient or permanent) and in case of permanent faults, the faulty section is isolated by Sectionalizer and power is restored to the healthy branches of the distribution system with a minimum time lag.



Control Unit

  • Power supply to operate the Sectionalizer
  • Multifunction meter to monitor – line current, line voltage, PF, fault & its type, duration of fault and other related data w.r.t. real time and transmit the same through its RS485 port MODBUS to the PLC on the control unit.
  • PLC with its sufficient memory stores these data and at the same time sends these data to the communication protocol


Every Control Unit is having a communication Modem (leased line / GPRS / 3G/GSM/Fibre Optic); hence they are connected to each other and also with auto-recloser and with the integrated SCADA (installed at substation) based on standard communication Protocol IEC-60870-5-104. Moreover, there will be dedicated RS-232C serial port capable of communicating (over IEC-60870-5-101).


Every control unit is equipped with rechargeable dry battery of adequate power delivering capacity & along with battery charger.

  • There is a continuous effort at Stelmec to keep abreast of latest technology inline with customers’ requirement.
  • All these activities are followed as per ISO 9001 : 2008.
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