PRODUCTS & SERVICES
Power Transformers
- - - - - - -- - - - - - -- - - - - - -- - - - -
Three Phase Transformers
- - - - - - -- - - - - - -- - - - - - -- - - - -
Single Phase Transformers
- - - - - - -- - - - - - -- - - - - - -- - - - -
Vacuum Circuit Breakers
- - - - - - -- - - - - - -- - - - - - -- - - - -
Electro-Porcelain Products
- - - - - - -- - - - - - -- - - - - - -- - - - -
Surge Arresters
- - - - - - -- - - - - - -- - - - - - -- - - - -
Transformer Oil
Surge Arresters
Surge Arrester

PRODUCTS:

ZnO Disks:

Distribution Class
Station Class:     Class - I        Class - II        Class - III

Surge Arresters:   

Arrester Rating  kV (rms)  :      11 kV  -  10 kA    22 kV  -  10 kA    33 kV  -  10 kA    66 kV  -  10 kA

Salient Features

Superior thermal stability of the ZnO disks.
Withstands High Current Impulse Test @65KA.
Superior pollution performance of the arrester.
Meets IEC 60099-4-2004 standards.
Cost effective.

Surge Arresters

Station class porcelain housed Arresters consist of a stack of Metal Oxide elements held rigidly by a tie rod with pressure release arrangements at both ends which consist of reverse acting diaphragms that rupture against a knife edged pressure release plate in the unlikely event of arrester failure. The rupture releases pressure build-up due to short circuit and causes the gases to be expelled through directional venting ports avoiding catastrophic failures.

ZnO Disks

High performance ZnO elements play an important role in the manufacturing of surge arresters. The ZnO elements are  manufactured in state-of-the-art manufacturing facility by taking acute care of composition, purity, particle size of input materials and manufacturing process - broadly consisting of homogenous mixing, spray drying, powder pressing and sintering at controlled conditions.  Sintered blocks are  glass coated and heat treated to achieve good stability and characteristics.
ZnO elements consist of ZnO grains and the depletion layers of Metal Oxide additives resulting in higher non-linear characteristics. 

Specifications - ZnO Disks

Characteristics

Diameter 33 + 1 mm

Height 23 + 1 mm

(Distribution Class)

 

Diameter 41 + 1 mm

Height 23 + 1 mm

(Class I)

Rated Voltage

3 kV rms

3 kV rms

Nominal Discharge Current

5 kA

10 kA

Current used for long duration Impulse test

75 A @ 1000 uS

250 A @ 2000 uS

High current impulse

65 kA @ 4/10 uS

100 kA @ 4/10 uS

Maximum continuous operating voltage

2.55 kV rms

2.55 kV rms

Reference voltage

> 3 kV rms

> 3 kV rms

Maximum leakage current under maximum continuous operating voltage

200 uA

270 uA

Weight Approximate

110 g

175 g

Applicable Standard

SC 37B

SC 37B

Maximum residual voltage at nominal discharge current

9 kV

9 kV

Reference current

1.0 mA

1.0 mA

 

© 2008 THE VICTORY GROUP