© abb ltd. ptmv, india july 2004 unisafe panel with vd4 circuit breaker product presentation

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© ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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Page 1: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

© A

BB

Ltd

. PT

MV

, IN

DIA

JU

LY 2

004

UNISAFE PANEL WITH VD4 CIRCUIT BREAKER

PRODUCT PRESENTATION

Page 2: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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Unisafe:Indoor Metal Clad Switchgear Cubicle

Page 3: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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UNISAFE PANEL

Designed and type tested to meet requirements of IEC60298 & 60694 / IS:3427

Air insulated indoor switchgear

Metal clad construction

Independent exhaust vents for all HT compartments

Internal arc tested

IP4X degree of protection externally - IP5X available as option

Page 4: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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UNISAFE PANEL

Integral Earthing Switch optional

Normal service conditions: Min ambient temp:-5oC Max ambient temp:+40oC

Quality System Certification- ISO 9001

Environmental Management System- ISO 14001

Page 5: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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BREAKER COMPARTMENT

Test position of circuit breaker behind closed 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

Page 6: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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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

Option of REF542 plus, composite unit for protection, measurement, control, signalling, interlock, automation and communication

Page 7: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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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

Page 8: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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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

Page 9: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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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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Construction details of Switchgear Cubicle type UNISAFE

Page 11: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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Construction details of Switchgear Cubicle type UNISAFE

Page 12: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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VD4 BREAKER

The VD4 type circuit breaker is designed and tested to meet requirements of IEC 62271-100 / IS : 13118

Vacuum used as insulation and arc interruption medium

Operationally safe and reliable

Capable of interrupting small magnetizing and capacitive currents

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VD4 BREAKER

Features of operating mechanism

O-C-O operation without recharging

Closing spring charged by motor in less than 15secs

Electrical anti-pumping

Provision for manual charging

Synchronisation and fast auto reclosure duty

Page 14: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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Vacuum Interrupter

1) Stem / Terminal

2) Twist protection

3) Bellows

4) Interrupter lid

5) Shield

6) Ceramic insulator

7) Shield

8) Contacts

9) Terminal

10) Interrupter lid

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Interruption principle

VACUUM ARC

Vacuum arc is initiated by the separation of current

carrying contacts and is maintained till the current zero

Two types of vacuum arc - Diffuse & Contracted

DIFFUSE TYPE

It occurs while interrupting the rated current

Single melting points form on the entire surface

of the cathode producing metal vapours which

support the arc

The diffuse vacuum arc is characterised by

expansion over the contact surface and by an

even distribution of thermal stress over the contacts

surfaces.

Negligible contact erosion

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Interruption principle

CONTRACTED TYPE Higher the interruption current, the arc tends

to be transformed from the diffuse into the

contracted type due to the Hall effect

The arc contracts at the anode and as the

current increases further it tends to become

sharply defined. In this area there is an increase

in temperature with consequent thermal stress

on the contact.

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Interruption principle

SPIRAL CONTACTS To prevent overheating and contact

erosion, the arc is kept rotating The special geometry of the spiral contacts

generates a radial magnetic field in all the areas

of the arc column An electromagnetic force is self generated and

acts tangentially causing rapid arc rotation around

the contact axis. The arc is forced to rotate and to

involve a wider surface than that of a fixed controlled arc Apart from minimising thermal stress, contact erosion

also is reduced which makes high short circuit current

interruption possible. Maximum dielectric strength is restored within micro-

seconds as the rapid reduction of current charge and

rapid condensation of the metal vapours happens

simultaneously along with the current zero.

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UNISAFE CROSS SECTIONAL DWG

Page 19: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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VD4 BREAKER DIMENSIONAL DRAWING

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TECHNICAL DETAILS

Description Unit Rating

Voltage kV 12

Frequency Hz 50

Current A up to 2000

Short time withstand kA 26.3 current (for 3 secs)

Peak withstand current kAp 66

Insulation level kVrms/kVp 28/75, 95kVp as option

WidthxDepthxHeight

up to 1250A b/b current mm 600 x 1550 x 2500

above 1250A b/b current mm 750 x 1550 x 2500

Weight with breaker (approx.) kg 1000

Degree of Protection-Enclosure IP4X, IP5X on request

UNISAFE PANEL

Page 21: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION

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TECHNICAL DETAILS

Description Unit Rating

Type VD4 12.0613E 12.06.20E 12.12.25 12.16.25

Voltage kV 12

Current A 800 800 1250 1600

Breaking capacity kA 13.1 20 26.3 26.3

Short time withstand kA 13.1 20 26.3 26.3 current (for 3 secs)

Peak withstand current kAp 33 50 66 66

Insulation level kVrms/kVp 28/75

Operating sequence O-3min-CO-3min-CO/ O-0.3secs-CO-3min-CO

Weight (approx.) kg 110 110 110 120

VD4 CIRCUIT BREAKER

Page 22: © ABB Ltd. PTMV, INDIA JULY 2004 UNISAFE PANEL WITH VD4 CIRCUIT BREAKER PRODUCT PRESENTATION