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Welcome
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MV Air Insulated Switchgear, Model Unisafe MV Indoor Vacuum Circuit Breaker, Model VD4 |
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 ABB - a global leader in power and automation technologiesABB (www.abb.com) is a global leader in
power and automation technologies that enable
utility and industry customers to improve
performance while lowering environmental impact. The
ABB Group of companies operates in around 100
countries.
ABB’s Power
Technologies Division serves electric, gas and water
utilities, as well as industrial and commercial
customers with a wide range of products, services
and solutions for power transmission and
distribution. ABB offers turnkey solutions for
substations, utility automation, HVDC and FACTS
(Flexible AC Transmission System).
ABB’s power technologies product portfolio includes
outdoor and indoor circuit breakers, gas insulated
switchgear, power transformers, instrument
transformers, disconnectors, capacitor banks and
reactive power compensators.
ABB’s medium
voltage product offering encompasses a complete
range of innovative products, systems and
technologies for applications in the 1 to 50 kV
class. This includes indoor air insulated and gas
insulated panels with vacuum and SF6 gas circuit
breakers, outdoor vacuum and SF6 gas circuit
breakers, ring main units, auto-reclosers, fuses,
switch disconnectors and prefabricated modular
solutions for power distribution.
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Salient Features : Unisafe Cubicle |
� Metal clad construction - all
compartments are segregated from each other with
metal sheets
� IP4X degree of protection externally & IP5X
available as an option
� Internal arc tested
� Independent exhaust vents for all HT compartments
� Internal earthing switch (optional)
� The normal service performances are guaranteed
under the following conditions:
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Min. Ambient Temp.: -50C
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Max. Ambient Temp.: -400C
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Max. Rel. Humidity: 95%
� Small width panel - 600mm up to 1250A busbar
rating
� Insulation level of 95kVp available on request
� Option of REF 542+, composite unit for protection,
measurement, control, signalling, interlock,
automation and communication |
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IndustrialIT
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The Unisafe panel
and VD4 circuit breaker are certified as complying
with the ABB IndustrialIT architecture. In this
architecture the Unisafe panel and VD4 circuit
breaker are part of the PowerIT suite. The products
complying with the IndustrialIT architecture can be
effectively integrated in a system with high added
value and a true ‘Plug & Produce’ mode.
 This
product has been tested and certified as
IndustrialIT Enabled, Level 0 - Information. All
product information is supplied in interactive
electronic format, compatible with ABB Aspect
ObjectTM technology. The IndustrialIT commitment
from ABB ensures that every enterprise building
block is equipped with the integral tools necessary
to install, operate, and maintain efficiently
throughout the product lifecycle.
Air insulated indoor switchgear cubicle type Unisafe
The Unisafe cubicle is designed and type tested to meet requirements of IEC 60694 / IS:3427.
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Metering compartment |
 �
Metering compartment with numerical / static /
electromagnetic relays, indicating meters, lamps and
control switches
� Protection and measuring apparatus customised as
per requirement
 Busbar
compartment
Spacious busbar compartment for adequate air
clearances
Option for busbar insulation available
Option for shroud on joints available
Breaker compartment
� Test position of circuit breaker
� Racking in/out of breaker from
‘test’ to ‘service’ position and vice-versa with
cubicle door closed
� Mechanical interlock to prevent racking in/out of
breaker, when breaker is in closed position
� Live parts covered by automatic metallic shutters
when breaker is racked out
PT compartment
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Withdrawable line PT provided in the breaker panel
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Removable fuses mounted on the PT
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Safety shutters between PT and cable compartment close automatically on PT withdrawal
Cable and CT compartment
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Spacious compartment to accommodate 1 set of CTs and 2 runs of cable
�
Option of rear extension to accommodate extra CTs or cables
�
Adequate height for cable termination
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Technical details |
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Description |
Unit |
Rating |
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Rated Voltage |
kV |
12 |
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Rated Frequency |
Hz |
50 |
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Rated Busbar Current |
A |
up to 2000 |
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Short time withstand current (3 sec) |
kA |
26.3 |
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kAp |
66 |
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Insulation levels |
kVrms/kVp |
28/75* |
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Width x Depth x Height |
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up to 1250A |
mm |
600 x 1550 x 2500 |
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above 1250A |
mm |
750 x 1550 x 2500 |
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Weight with circuit breaker (approx) |
Kg |
1000 |
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Degree of protection |
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Enclosure |
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IP4X |
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Between the compartments |
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IP2X |
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Indoor switchgear – vacuum circuit breaker type VD4 |
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The VD4 type circuit breaker is designed and tested to meet requirements of IEC - 62271-100 / IS: 13118. |
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Salient Features |
� Vacuum used as insulation and arc
interruption medium
� Operationally safe and reliable in a wide range of
ambient temperatures (-)50 to 400C
� Capable of interrupting small magnetising and
capacitive currents
� Features of operating mechanism:
– O-C-O operation without recharging
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Closing spring charged by motor in less than 15
seconds
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Electrical anti-pumping
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Provision for manual charging
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Synchronisation and fast auto reclosure duty |
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Technical details |
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Description |
Unit |
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Rating |
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Type |
VD4 |
12.06.13E |
12.12.25 |
12.16.25 |
12.20.25 |
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Rated Voltage |
kV |
12 |
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Insulation Levels |
kVrms/kVp |
28/75 |
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Normal Current (400C amb.) |
A |
800 |
1250 |
1600 |
2000 |
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Breaking Capacity |
kA |
13.1 |
26.3 |
26.3 |
26.3 |
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Making Capacity |
kAp |
33 |
66 |
66 |
66 |
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Short time withstand current |
kA(3sec) |
13.1 |
26.3 |
26.3 |
26.3 |
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Opening time |
ms |
55 (max) |
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Arcing time |
ms |
15 (max) |
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Total Break time |
ms |
70 (max) |
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Making time |
ms |
75 (max) |
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Operating Sequence |
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0 -3min - CO - 3min - CO/ |
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0 - 0.3sec - CO - 3min - CO |
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Weight (approx.) |
Kg |
110 |
110 |
120 |
250 |
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Quality assurance
All of ABB’s manufacturing facilities in India are ISO 9001 certified which reflects ABB’s commitment to quality. ABB is equally committed to environmental sustainability. The Nashik facility is certified under ISO 14001.
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For more
details please contact us |
© 2007 Ajit Electrical All Rights Reserved.