*(Insulator)

2 : (Self Restoring) (Non-Self Restoring) , Vacuum,

(Insulators) 2.

3

(Dry Arcing Distance)(Creepage Distance)

CREEPAGEDISTANCE. 4

*Ex. 22 kV = 484 mm ( 24x16 )

1. : 1 .2. : 1 .3. : 1 . .

*

Pin type insulatorLine post type insulatorPin post type insulator Suspension type insulatorInsulators .

Pin Type Insulator22 kV systemCreepage distance : 432 mmDry flashover : 110 kVWet flashover : 70 kVImpulse flashover ,positive : 175 kVImpulse flashover ,negative : 225 kV33 kV systemCreepage distance : 553 mmDry flashover : 125 kVWet flashover : 80 kVImpulse flashover ,positive : 200 kVImpulse flashover ,negative : 265 kVStandard : TIS 279Class 56-2Class 56-3

Pin Type InsulatorStandard : TIS 279Class 56-2Class 56-3 15 (Puncture) .

Line Post Type Insulator22 kV systemCreepage distance : 559 mmDry flashover : 110 kVWet flashover : 85 kVImpulse flashover ,positive : 180 kVImpulse flashover ,negative : 205 kVStandard : TIS 1077Class 57-2Class 57-333 kV systemCreepage distance 737 mmDry flashover : 125 kVWet flashover : 100 kVImpulse flashover ,positive : 210 kVImpulse flashover ,negative : 260 kVHigh pollution 22 kV system

Line Post Type InsulatorStandard : TIS 1077Class 57-2Class 57-3 15 (Puncture) Creepage Impulse Flashover Pin-type

Line Post Type InsulatorHigh pollution 33 kV systemCreepage distance : 1,015 mmDry flashover : 150 kVWet flashover : 125 kVImpulse flashover , positive : 255 kVImpulse flashover , negative : 340 kVStandard : TIS 1077Class 57-4

22 kV systemCreepage distance : 534 mmDry flashover : 110 kVWet flashover : 80 kVImpulse flashover ,positive : 180 kVImpulse flashover ,negative : 205 kV33 kV systemCreepage distance : 699 mmDry flashover : 120 kVWet flashover : 85 kVImpulse flashover ,positive : 210 kVImpulse flashover ,negative : 230 kVHigh pollution 22 kV systemStandard : TIS 1251Class 56/57-2Class 56/57-3Pin Post Type Insulator

Standard : TIS 1251Class 56/57-2Class 56/57-3Pin Post Type Insulator 15 (Puncture) Creepage Impulse Flashover Pin-type Protected Creepage ()

Pin Post Type InsulatorHigh pollution 33 kV systemCreepage distance : 953 mmDry flashover : 140 kVWet flashover : 95 kVImpulse flashover , positive : 255 kVImpulse flashover , negative : 300 kVStandard : TIS 1251Class 56/57-4

Suspension Type Insulator ( 22 kV)22 kV systemCreepage distance : 534 mmDry flashover : 175 kVWet flashover : 80 kVImpulse flashover ,positive : 300 kVImpulse flashover ,negative : 275 kVHigh pollution 22 kVCreepage distance : 712 mmDry flashover : 225 kVWet flashover : 105 kVImpulse flashover ,positive : 385 kVImpulse flashover ,negative : 355 kVStandard : TIS 563 Class 52-13 EA/set4 EA/set

33 kV systemCreepage distance : 584 mmDry flashover : 156 kVWet flashover : 90 kVImpulse flashover ,positive : 255 kVImpulse flashover ,negative : 255 kVHigh pollution 33 kVCreepage distance : 876 mmDry flashover : 215 kVWet flashover : 130 kVImpulse flashover ,positive : 355 kVImpulse flashover ,negative : 345 kVStandard : TIS 563Class 52-43 EA/set4 EA/setSuspension Type Insulator ( 33 kV)

Suspension Type Insulator (Dead-end) 15 (Puncture)

*SR Composite InsulatorPorcelainComposite

*

* Hydrophobic ( )

* HydrophobicBefore Test4

* SRPorcelain and sand >> water soaks inPorcelain and salt>> water soaks inSilicone and sand>> 24 hours later the water repels offSilicone and sand>> 24 hours later the water repels off

*Power Arc Resistance (50kA, 1 second)

* SR (Very heavy pollution)

* Polymer SREPDM ()

*

*

*

*

*

* (Flash over) Interruption Voltage sag/dip Flash over

* . 02-590-5585E-mail : wittaya.ch@pea.mail.go.th

//-5585*//-5585