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12/36kV Pole Mounted Automatic Circuit Recloser

12/36kV Pole Mounted Automatic Circuit Recloser

Salient Features

  • Stainless steel tank
  • In-built user configurable functionality
  • In-built current & voltage sensors
  • Vacuum interrupters inside solid dielectric poles
  • Control Unit with logic based programming
  • Magnetic actuator operated mechanism
  • Arc fault containment
  • Power Quality Software
  • SF6 free design to reduce environmental footprints

Application

Autoreclosers can be installed in branch feeder lines in a power distribution system or in a Ring Feeder arrangement for a simple Distribution Automation system. It has been observed that about 70% of faults in a power distribution system are Transient Faults typically less than 100 milli-seconds. With an Autorecloser capable of providing up to 4 reclosing operations each operation user configurable the Autorecloser can monitor the state of the fault on every close. If the fault has been transient then supply is restored. In the case of a permanent fault the Recloser will lockout and isolate the fault. This increases reliability of supply. For the Ring Feeder arrangement they can be set to isolate the faulty section and restore supply to the maximum number of users.

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Control Unit

    The RC10 control and communications cubicle provides directional overcurrent earth fault and sensitive earth fault relay, auto reclosing relay, instantaneous metering, event log, demand logger and remote terminal unit (RTU) for remote control in a single package. The operator control panel is provided with a large backlit LCD display and keypad to provide fast navigation and local control. The panel menus are presented in descriptive text which provides ease of use for operators and reduces the learning curve.

    The control cubicle has three (3) main modules:

  • The operator panel module which provides the Human Machine Interface (HMI).
  • The Switch Interface Module (SIM) provides power management, battery charging and incorporates the capacitors that provide the tripping and closing energy to the OSM tank.
  • The Relay module includes the main microprocessor and provides DSP functionality.

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  • 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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