Isolators are switching devices used to disconnect parts of power systems for maintenance and repair. They are normally operated with no load and have no current breaking or making capacity. Isolators are typically located on the supply side of circuit breakers and automatic switching is preferred. Isolators simultaneously switch all three poles to ensure disconnection and can also be used to isolate equipment, sectionalize and bypass buses, and transfer loads.

1. INTRODUCTION:
 I S OL AT OR S A R E U S E D T O DI S CON N EC T THE
PA RT OF P OW E R S / M FOR M A I N T E N A N C E
A N D R E PA I R
 T H E Y A R E M A I N LY OPE R AT E D ON N O
LOA D
 T H E S E D OE S N ’ T H AV E A N Y C U R R E N T
B R E A K I N G OR M A K I N G C A PAC I T Y
 S I T UAT E D AT T H E S U PPLY S I DE OF
C I RC U I T B R E A K E R S
 N OR M A L LY AU T OM AT I C T Y PE OF
S W I T C H I N G I S PR E F F E R E D

2.  Interlocking of all three poles which ensures
the simultaneous operation
 Interlocking of circuit breakers

3.  Ho r i z o n t a l ce n t ra l ro t a t i n g d o u b l e b r e a k
isolator
 Ve r t i c a l b r e a k i s o l a t o r
 p a n t o g ra p h i s o l a t o r

7.  Isolating the equipments from the buses
for the maintenance purpose
 Sectionalizing the buses
 Bypassing the buses
 Transferring the loads

8. art
script
design