1. VHA PANEL WITH HPA12 CIRCUIT BREAKER
PRODUCT PRESENTATION
VHA PANEL WITH HPA12 CIRCUIT BREAKER

2. VHA 12 PANEL
Designed and type tested to meet requirements of IEC 298 & 694 / IS:3427
Air insulated indoor switchgear
Metal clad construction
Internal arc tested
IP4X degree of protection externally and IP2X between compartments
Independent exhaust vents for all HT compartments

3. VHA 12 PANEL Integral Earthing Switch optional
Normal service conditions: Min ambient temp:-5oC, Max ambient temp:+40oC
Up to 3000A in panel without forced cooling
Quality System Certification- ISO 9001
Environmental Management System- ISO 14001

4. BREAKER COMPARTMENT
Cassette mounted breaker with isolated position on cubicle front door
Racking in/out of breaker from test to service position and vice-versa with cubicle door closed only
Mechanical interlock to prevent racking in/out of breaker, when breaker is in closed position
Live parts covered by automatic shutters when breaker is racked out

5. METERING COMPARTMENT
Metering compartment with numerical/static/electro-magnetic relays, indicating meters, lamp and control switches
Protection and measuring apparatus customized as per requirement

6. CABLE AND CT COMPARTMENT
Spacious construction to accommodate 1 set of CTs and 2 runs of cables
Option of rear extension to accommodate extra CTs or cables
Adequate height for cable termination

7. PT COMPARTMENT Withdrawable line PT provided in the breaker panel
Removable fuses mounted on the PT
Safety shutters between PT & Cable compartment close automatically on PT withdrawal

8. BUSBAR COMPARTMENT
Spacious busbar compartment for adequate air clearances
Option for busbar insulation available
Option for shrouds on joints available

9. HPA BREAKER
The HPA type circuit breaker is designed and tested to meet requirements of IEC 56 / IS : 13118
SF6 gas used as insulation and arc interruption medium
Arc control and extinction achieved by puffer principle
Capable of interrupting small magnetizing and capacitive currents

10. HPA BREAKER Features of operating mechanism
O-C-O operation without recharging
Closing spring charged by motor in less than 15secs
Electrical anti-pumoing
Provision for manual recharging
Synchronisation and fast auto reclosure duty

11. HPA BREAKER
The HPA series of CB are designed and type tested to meet the requirements of IEC / IS:1318
The HPA series of CB use SF6 gas as insulating and arc interruption medium
Arc interruption and control are achieved by puffer principle
Short arc duration followed by rapid dielectric recovery
Long electrical life, as the interruption system develops low arc energy and contact wear is minimal
Long mechanical life with study and proven operating mechanism
operations at no load
operations at rated current

12. HPA BREAKER
Operationally safe and reliable in wide range of operating temperature -5o to +40o c
Capable of interrupting small magnetizing and capacitive currents
Compact design with relatively light weight construction
Features of operating mechanism
O-C-O operation without recharging
closing spring charged by motor in less than 15 secs.
electrical anti-pumping
provision for manual recharging
synchronization and fast auto-reclosure duty

13. VHA PANEL CROSS SECTIONAL DWG

14. VHA 12 PANEL TECHNICAL DETAILS Description Unit Rating Voltage kV 12
Frequency Hz 50
Current A 630, 1250, 1600, 2000, , 3000, 4000
Short time withstand kA current (for 3 secs)
Peak withstand current kAp 100
Insulation level kVrms/kVp 28/75
WidthxDepthxHeight mm 800x1370x2340
Weight with breaker (approx.) kg
Degree of Protection-Enclosure IP4X

15. HPA12 CIRCUIT BREAKER TECHNICAL DETAILS Description Unit Rating
Voltage kV 12
Frequency Hz 50
Current A 1250, 1600, 2000, 2500, 3150
Breaking capacity kA 40
Short time withstand kA current (for 3 secs)
Peak withstand current kAp 100
Insulation level kVrms/kVp 28/75
Operating sequence O-3min-CO-3min-CO/ O-0.3secs-CO-3min-CO
Weight (approx.) kg

16. INSTALLATIONS OVER 25,000 PANELS INSTALLED MAJOR INSTALLATIONS AT:
POWER PLANTS
DISTRIBUTION UTILITIES
STEEL PLANTS
CEMENT PLANTS
REFINERIES
VARIOUS INDUSTRIES & IN-FRASTRUCTURE PROJECTS

17. SUCCESFULL INSTALLATIONS IN GENEARATIONS
Major installations of VHA 12S +HPA
POWER PLANT LOCATION SF6 SWGR INSTALLED
MSEB ( CHANDRAPUR UNIT IV V &VII ,KORADI) (1989,95,99)- 593
NTPC ( VINDHYACHAL 500MW)(1995)
NTPC ( TALCHER 4 X 500MW) (1999)
APSEB ( RAYALSEEMA 2 X 210 MW) (1998)
BSES DAHANU ( 2 X 250MW) (1994)
MPEB SGTPS (1997)
GIPCL (2 X 125 MW) (1996)
Total SF6 panels installed in Generations in India Nos
ABB’s market share in Generation is 70% !!!

19. HPA – Arc Interruption principle
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