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VHA PANEL WITH HPA12 CIRCUIT

BREAKER

PRODUCT PRESENTATION

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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

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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

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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

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METERING COMPARTMENT

Metering compartment with numerical/static/electro-magnetic relays, indicating meters, lamp and control switches

Protection and measuring apparatus customized as per requirement

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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

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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

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BUSBAR COMPARTMENT

Spacious busbar compartment for adequate air clearances

Option for busbar insulation available

Option for shrouds on joints available

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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

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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

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The HPA series of CB are designed and type tested to meet the requirements of IEC-60056 / 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

- 10000 operations at no load

- 10000 operations at rated current

HPA BREAKER

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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

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VHA PANEL CROSS SECTIONAL DWG

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TECHNICAL DETAILS

Description Unit Rating

Voltage kV 12

Frequency Hz 50

Current A 630, 1250, 1600, 2000, 2500, 3000, 4000

Short time withstand kA 40 current (for 3 secs)

Peak withstand current kAp 100

Insulation level kVrms/kVp 28/75

WidthxDepthxHeight mm 800x1370x2340

Weight with breaker (approx.) kg 1000

Degree of Protection-Enclosure IP4X

VHA 12 PANEL

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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 40 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 190-225

HPA12 CIRCUIT BREAKER

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INSTALLATIONS

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

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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) - 248 NTPC ( TALCHER 4 X 500MW) (1999) - 451 APSEB ( RAYALSEEMA 2 X 210 MW) (1998) - 235 BSES DAHANU ( 2 X 250MW) (1994) - 163 MPEB SGTPS (1997) - 179 GIPCL (2 X 125 MW) (1996) - 110

Total SF6 panels installed in Generations in India - 4100Nos

ABB’s market share in Generation is 70% !!!

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HPA – Arc Interruption principle

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