Disconnector
EHV Switchgear
DISCONNECTOR
CG has been a name to reckon with in the global electrical arena. We bring all our products with leading edge technology which supplement the existing CG range of switchgear products in order to complete the scope of the substation equipment such as outdoor off load disconnector.
We started manufacture and supply of the isolators from the year 2005 and within a short span of time we have made our presence felt worldwide. We are exporting disconnector products to almost 32 countries.
There are two types of Disconnectors. HCBD and HDBD.
Features
- Accepted world-wide
- Self-alignment of contact assemblies at works, these are ready to erect at site
- Lifetime self lubricated sealed aluminum die cast bearings
- Designed and tested for Class M2 – mechanical operation test, as per IEC: 62271-102
- Reliable turn and twist type with sheet steel canopy
- Various options with individual pole/gang operation, motor and manual operations possible
- The full range is type tested in the NABAL accredited laboratories
Technical Specification
|
Rated Voltage |
Rated Current* |
Rated short Time current |
Rated peak Short Circuit current |
Power Frequency Withstand Voltage r.m.s 1min. |
Lighting impulse Withstand Voltage 1.2/50mS |
Switching impulse Withstand Voltage 250/2500mS |
|||
|
To earth |
Across isolating distance |
To earth |
Across isolating distance |
To earth |
Across isolating distance |
||||
|
kV |
A |
kA |
kAp |
kV |
kV |
kVp |
kVp |
kVp |
kVp |
|
72.5 |
1250 / 1600 / 2000 |
40 |
100 |
140 |
160 |
325 |
375 |
— |
— |
|
123 |
1250 / 1600 / 2000, |
40 |
100 |
230 |
265 |
550 |
630 |
— |
— |
|
145 |
1250 / 1600 / 2000, |
40 |
100 |
275 |
315 |
650 |
750 |
— |
— |
|
170 |
1250 / 1600 / 2000 |
40 |
100 |
325 |
375 |
750 |
860 |
— |
— |
|
245 |
1250 / 1600 / 2000 |
40/50 |
100/125 |
460 |
530 |
1050 |
1200 |
— |
— |
|
300 |
4000 |
40/50 |
100/125 |
380 |
435 |
1050 |
1050(+170) |
850 |
700(+245) |
|
420 |
2000 / 2500 |
40/50 |
100/125 |
520 |
610 |
1425 |
1425(+240) |
1050 |
900(+345) |
| * higher current optional. | |||||||||
Horizontal Centre Break Disconnectors and Horizontal Double Break Disconnectors
Manual and motorized operating mechanisms can be provided. Mechanical interlocks between main circuits and earthing blades are standard. All disconnectors are fully type tested at laboratories like CPRI and ERDA as per IEC 60129 and IEC 62271-102 standards.