Transmission Lines

Fuse and Switches

 
 
 

Introduction

An electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low through using transformers and may be changed in voltage in several steps


Our switching equipment will cover from high voltage, medium voltage and low voltage system, starting from the substation 115 kV Disconnectors and earthing switches are safety devices used to open or to close a circuit when there is no current through them. They are used to isolate a part of a circuit, an equipment, a part of an overhead line or an underground line so that maintenance can be safely conducted.


Then come to the medium voltage system which our fuse cutout can interrupts excessive current (blows) to prevent the damage by overheating or fire which is an essential in electrical systems to limit threats to human life and property damages. Finally, low tension fuse switch is very efficiently use to protect the PEA low voltage distribution system.


The world technology now brings to the Distribution Automation System or Remote Controlled Switch, The Pole mounted SF6-Gas Insulated Load Break Switch is designed to use an innovative puffer principle to extinguish the arc of full-load interruptions quickly and efficiently. The automatic load break switch can be integrated type controller includes RTU (Remote switching control, Status monitoring, Metering (current, voltage, power factor, frequency, power, energy, counter) & Recording(events, fault current waveforms, data logging)


Features

The equipment shall have successfully passed all the type tests or design tests in accordance with the Thai Industry Standards and the following international standards:

  • IEC Publication No.60129 Alternating current disconnectors (isolators) and earthing switches
  • IEC Publication No. 60265-1-(1998) High-voltage switches.
  • IEC Publication No. 60947-3 Low voltages Switchgear and Controlgear
  • ANSI Publication No. C37.30-197l Definitions and Requirements for High-voltage Air Switches Insulators and Bus Supports
  • ANSI Publication No. C37.32-1972 Schedules of Preferred Ratings, Manufacturing pecification and Application Guide for High voltage Air Switches Bus Supports and Switch Accessories
  • ANSI Publication No. C37.34-1971 Test Code for High-voltage Air Switches
  • NEMA Publication No. SG6-1974 Power Switching Equipment.
  • ANSI C37.41-1994 Design Tests for High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories.
  • ANSI C37.42-1989 Specifications for Distribution Cutouts and Fuse Links.

All the products shall be completely passed the routine test before delivery to the local and oversea customers.

Type

Please contact us for more details.

  • Air Break & Load Break Switch (Motor Operate, Switch)
  • Disconnecting Switch
  • Fuse Cutout
  • Fuse Link (Fuse Link for Drop Out, HRC Fuse Link, Power Fuse, Secondary Fuse Link)
  • Low Tension Fuse Switch
  • SF6 Load Break Switch

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The equipment shall have successfully passed all the type tests or design tests in accordance with the Thai Industry Standards and the following international standards:

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