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CAT No.:
EE/CAT/09/00
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USS-12
Unitized Secondary Substation
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Secondary Substation Unitiznitized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation
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tation Unit nitized Secondary Substation Unitized Secondary Substation Unitized Secondary Su
USSSubstationUnitized-12Secondary Substation Unitized Secondary Substation
USSSubstationUnitized-12Secondary Substation Unitized Secondary Substation
nitized Secondary
tation Unitiznitized Secondary
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Secondary Substation Unitizedzed Secondary Substation Unitized Secondary Substation Unitized Secondary Substation
Unitized Secondary Substation
Schematic Diagram
11KV AIR INSULATED
RING MAIN UNIT (3LBS )
USS is a prefabricated secondary substation
with the combination of Medium Voltage
DESIGN & CONSTRUCTION
H.V SWITCH GEAR
Compartment
Switchgear, Low Voltage Switchgear,
Distribution Transformer and associated
components of Metering and protection
SFU
Incoming
modular design and construction.
Equipment Combination
Generally the USS is divided into three compartments
divisions namely Medium Voltage Switchgear
compartment, Low Voltage Switchgear
The Enclosure is made of Special Insulating
compartment and Distribution Transformer
material called PUF (Poly-Urethene Foam)
compartment.
sandwiched between two Pre-coated GI sheets
and they are
To Feeder
500 kVA
11/0.433 kV
The modular design provides easy detachability
complying to IP 5X Standards.
LBS
OIL COOLED /
HERMATICALLY
SEALED
TRANSFORMER
Compartment
of walls, doors, ceilings and roofs, however
The USS is compartmentalized into three
LBS
ESWARI's USS is an unique innovative
requirements and all fitted in one compact
unit in accordance to the standards.
Secondary Substation Uniti
Unitized
tation Unit
tation Uniti
Secondary Substation Unitized
415V / 800A
Air Circuit
Breaker
L.V SWITCH GEAR
Compartment
i) Medium voltage switchgear compartment
Medium voltage switchgear can be of either one
. This offers excellent insulating properties for
of the following
MCCB MCCB
MCCB
MCCB MCCB
MCCB
both electrical and thermal factor. All the wall
Special Features
Ring Main Unit
(SF6 Gas insulated / vacuum type)
and door panels are provided with a Special
tongue and groove construction to enable a
All weather proof enclosure.
CAM-Lock fastening system.
11KV SF6 RING MAIN UNIT
(2LBS 1VCB)
H.V SWITCH GEAR
Compartment
Load Break Switches / Switch Fuse
disconnectors.
Resistance to outside temperature and humidity
LBS
Incoming
High level of personal safety & protection
ii) Low voltage switchgear compartment
High load breaking capacity at low weight and
LBS
To Feeder
CAST RESIN
TRANSFORMER
Compartment
1000 kVA
11/0.433 kV
Low voltage switchgear can be in accordance with
standards as well as individual requirements.
reduced overall plant and operating costs
VCB
Absolute water & vapour and temperature
1250A
H
barriers
High durability & very low maintenance cost
L.V SWITCH GEAR
Compartment
Air Circuit
Breaker
Generally, it includes the combination of
Air Circuit Breaker, MCCB, MCB and
Switch Fuse disconnectors.
Highly fire retardant
iii) Distribution Transformers
Can be installed very quickly & very convenient
MCCB
MCCB
MCCB
MCCB
MCCB
MCCB
The transformer can be of either one of the
L
Applicable Standards
W
following
TM
Oil cooled with conservator
Dimensions
(in mm)
H
W
L
Upto 400 kVA
1500
2400
2000
equipments like IEC 60265, IEC 60298, IEC 60694
400 kVA - 630 kVA
1500
2600
2100
IEC 60439 & IEC 60076
630 kVA - 1000 kVA
1800
2800
2300
USS is designed and tested in accordance with
IEC 61330 and also with individual standards of
Description
Oil cooled with hermetically sealed
e-BUS Interfacer is an innovative device of ESWARI to
Cast Resin / Cast impregnated type
offer a low cost SCADA / Automation Solution. The
And the rating of the transformer depends upon
the customer requirement upto 1000 kVA.
interfacing device enable the user to control and acquire
data from the USS. The Switchgear ON & OFF operation
can be remotely controlled through GSM / Internet.
The data such as Current, Voltage, Power, Frequency can
also be obtained remotely through this interfacing device.
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Secondary Substation Unitized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation UniUnitized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation Uni ized Secondary
Substation Unitized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation Unitize ized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation Unitized Secondary Substation Unitiz