| Guaranteed
Technical Particulars for 11 KV Switch Air Break Type with Post
Insulators |
| S. No. |
Particulars |
Technical Particulars |
| 1 |
Manufacturer's
type / Designation / Installation |
11 KV 200, A
Tilting type |
| 2a) |
Manufacturer's name and country of manufacture
|
M/s. Jaipuria Brothers Electricals Pvt. Ltd.,
Delhi |
| b) |
Works Address |
F-16 -17, Ganga Vihar, Gokul Puri Shahdara
Delhi |
| 3 |
Standard (s) according to which the isolators
are manufactured |
IS 9921 / Part I to V |
| 4 |
Maximum design voltage at which the isolators
can operate |
12 KV |
| 5 |
Rated Frequency |
50 Hz. |
| 6 |
Rated Voltage |
12 KV |
| 7 |
Continuous current rating |
200 A |
| 8 |
Rated short time withstand current for one
second |
|
| 9 |
Voltage drop across terminals |
As per relevant IS |
| 10 |
Current
density at the minimum cross section of : |
|
| a) |
For copper parts ( Amp. /sq . Mm) |
Less than 2.5 |
| b) |
For aluminum parts (Amp. Sq/ mm) |
Less than 1.0 |
| 11 |
Maximum temperature rise of following current
carrying parts when carrying rated current continuously (deg. C)
over an ambient of 50 deg . C Instead of 40 deg. C mentioned in
relevant IS |
25°C |
| 12 |
Class (outdoor) |
Outdoor |
| 13 |
Insulation
levels. |
|
| i) |
impulse withstand voltage (KV peak) |
|
| a) |
Across the isolating distance |
85 KV |
| b) |
Phase to earth |
75 KV |
| ii) |
Power Frequency withstand voltage (KV rms) |
|
| a) |
Phase to earth |
28 KV |
| b) |
Across the isolating distance |
32 KV |
| 14 |
Minimum clearance in air (mm) center to center
between phase to phase |
600 mm |
| 15 |
Minimum distance between insulators |
As per drawing to be approved |
| 16 |
Minimum Isolating distance (in open position) |
375 mm |
| 17 |
Design &
Construction : |
|
| i) |
Number of insulators Per Pole |
3 nos. |
| ii) |
Number of breaks Per Pole |
Single |
| iii) |
Type of closing / opening mechanism |
Vertical |
| 18 |
Height of contacts |
110 mm |
| 19 |
Cross section and number of fixed contact leafs
|
2 nos., 38 mm x 3.0 mm thick |
| 20 |
Cross section of moving blade |
32 mm x 5 mm |
| 21 |
Size and numbers of spring used in fixed
contact |
4 nos, 16 SWG, 28 mm long, 15 mm OD & 6
turns |
| 22 |
All Current carrying copper parts should be
suitable to have current density less than |
2.5 A/ sq. / mm |
| 23 |
All Current carrying aluminum
parts should be suitable to have current density less than |
1.0 A/ sq/ mm |
| 24 |
Operating pipe (handle & rod) |
25 mm NB, 5.0 meter long med,
class |
| 25 |
Type of bearings |
Rocking type lever supported on
side plates with self lubricated nylon rings |
| 26 |
Base channels |
75 mm x 10 mm x 100 mm long |
| 27 |
Post
Insulators |
|
| a) |
Type |
11 KV, E-22, IS 2544 |
| b) |
Name of manufactures |
Name of manufactures |
| c) |
Height of each insulator |
245 mm |
| d) |
Tensile strength (Kg) |
20 KN |
| e) |
Compressive strength |
40 KN |
| f) |
Torsional strength in (Kg m) |
340 MN |
| g) |
Cantilever strength upright |
9 KN |
| h) |
Power frequency dry flash over voltage (KV) rms |
As per relevant IS |
| i) |
Power frequency we flash over voltage (KV) rms |
As per relevant IS |
| j) |
Impulse flash over voltage (positive wave )
(KV) peak |
As per relevant IS |
| k) |
Impulse with stand voltage (KV) peak |
75 |
| l) |
Power frequency puncture voltage (KV) rms |
As per relevant IS |
| m) |
Visible discharge voltage level (KV) rms |
9 |
| n) |
Cree page distance |
300 mm (min) |
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