33
kV Pin
Insulator
These Pin Insulators are made by the wet process
using high grade raw materials. The basic raw
materials that go into the manufacture of these
insulators of these insulators are naturally
occuring clays and minerals like quartz and
feldspar. The coarsely-powdered materials are ground
to the required particle size in ball mills. The
moisture content is reduced in filter process to
obtain solid cakes. The cakes are fed into the pug
mills. The void free pugs that are extruded from the
pug mills are then pressed into shape and glazed
after drying. These insulators which are thoroughly
inspected before glazing are fired in the tunnel
kilns.
The body composition developed over the years
ensures excellent mechanical and electrical
characteristics. These insulators are provided with
Zinc thimbles suitable for Small and Large Steel
Head Pins. Above Pin Insulators are subjected to a
full series of type tests such as Impulse and Power
Frequency Tests, Temperature Cycle Test, Mechanical
(cantilever) test, Puncture Test & Porosity Test.
Full quality control is exercised at all stages of
manufacture. Some of the tests conducted on all
insulators during manufacture are crack detection
before firing, high frequency high voltage test
besides routine electrical test at power frequency,
in addition, porosity and temperature cycle tests
are conducted for each batch of manufacture.
These pin insulators conforms to specifications,
BS:137, IEC:383, IS:731 and other international
specifications.
|
Standard Particulars |
|
|
|
|
Product No. |
UT-P2212 |
UT-P3311 |
UT-P3312 |
|
Highest System Voltage |
kV |
24 |
36 |
36 |
|
Total Creepage Distance (Nominal) |
mm |
432 |
580 |
685 |
|
Protected Creepage Distance (Nominal) |
mm |
210 |
300 |
335 |
|
Cantilever Strength |
kN |
10 |
10 |
10 |
|
Flashover Voltage |
Power
Frequency |
Dry |
kV |
100 |
110 |
130 |
|
Wet |
kV |
60 |
85 |
95 |
|
Impulse |
Positive |
kVp |
160 |
205 |
210 |
|
Negative |
kVp |
205 |
225 |
250 |
|
Withstand Voltage |
Power Frequency |
Dry |
kV |
90 |
100 |
110 |
|
Wet |
kV |
55 |
80 |
90 |
|
Impulse |
Positive |
kVp |
140 |
180 |
200 |
|
Negative |
kVp |
150 |
190 |
220 |
|
Power Frequency Puncture Voltage |
kV |
145 |
200 |
210 |
|
Visible Discharge Voltage |
kV |
18 |
27 |
27 |
|
Thimble Type : IS:2486 (Part-II)/ BS:3288
(Part-II) |
|
Large |
Large |
Large |
|
Nett Weight (Approx.) |
kg |
5 |
7.5 |
9.5 |
|
Contents of each package |
Nos |
4 |
3 |
3 |
Applicable Specifications IS:731 BS:137 & IEC:383
Note : Insulators can also be supplied with Radio
Free Glaze.
Export packing of insulators in pallets
