Pid nov 2011-electrical_updated

Vaibhav Group, India
[2011] Nov 2011 Release

Vaibhav Group – Projects and
Products

Design & Developed By:
Vaibhav Group of Companies
www.vaibhavgroup.com
Reach us: vaibhav.power@yahoo.co.in
Visit us: www.vaibhavgroup.com

Vaibhav Group, India Nov 2011 Release

Table of Contents
Introduction .................................................................................................................................. 3
Recent Projects / Supplies ............................................................................................................. 3
Products: ....................................................................................................................................... 6
1. Transformers ......................................................................................................................... 6
1.1. Distribution Transformers .............................................................................................. 6
1.2. Power Transformers ....................................................................................................... 6
2. HT Switchgear ........................................................................................................................ 7
3. LT Switchgear......................................................................................................................... 9
4. Switchyard Equipments........................................................................................................ 10
4.1. Tn Line Towers ............................................................................................................. 10
4.2. Isolator......................................................................................................................... 11
4.3. Dropout fuse ................................................................................................................ 12
4.4. Lightening Arrester....................................................................................................... 13
4.5. Neutral Grounding Resistors......................................................................................... 14
4.6. GSS Switchyard Structure ............................................................................................. 15
5. Cable ................................................................................................................................... 16
6. ACSR/AAC Conductor ........................................................................................................... 17
7. Insulators ............................................................................................................................. 18
Clients ......................................................................................................................................... 19



Introduction
Vaibhav Group of Co. is involved in the supply, installation, testing and commissioning of all the
major items related to Electrical Substations, Switchyards, Transmission / Distribution system,
Automation and Scada among other necessary items.

Vaibhav Structurals is an ISO 9001:2008 certified company and almost all our vendors also have
similar quality standard certifications.

All the material manufactured and supplied by us are tested and certified by many 3 rd party
laboratories across India.

Recent Projects / Supplies

Some of our most recent projects where we supplied the above products are as below:

1. Electrical and Instrumentation and Control work

River Water System at Chhabra Thermal Power Plant

On the banks of River Parvathi and River Bentli, situated is the place called Chhabra in the
Dist. of Baran at Rajasthan. Rajasthan Vidyut Utpadan Nigam is setting up a 2 x 750 MW
Thermal Power Plant.

Scope:

Vaibhav Structurals is responsible for the electrical work at the thermal plant. This is an LSTK
contract, where Vaibhav Structurals is responsible for supply, erection, testing and
commissioning of the following:

a. Power Transformers
b. Distribution Transformers
c. Conductor
d. LT and HT Switchgears
e. Battery and Battery Charger
f. Cable and Conductor
g. Steel Structure
h. PLC / SCADA – Automation*
2. Electrical and Instrumentation and Control work

River Water System at Kalisindh Thermal Power Plant

Rajasthan Vidyut Utpadan Nigam is setting up a 2 x 750 MW Thermal Power Plant at
Kalinsidh, near Jhalawar in the state of Rajasthan. This is one of the most prestigious projects
of the govt. and we are proud to be working on this.



Scope:

Vaibhav Structurals is responsible for the electrical work at the thermal plant. This is an LSTK
contract, where Vaibhav Structurals is responsible for supply, erection, testing and
commissioning of the following:

a. Power Transformers
b. Distribution Transformers
c. Conductor
d. LT and HT Switchgears
e. Battery and Battery Charger
f. Cable and Conductor
g. Steel Structure
h. PLC / SCADA – Automation*

3. Lift Irrigation Scheme

Water Resource Department, Balapura

Water Resource Department is Govt. of Rajasthan enterprise responsible for managing the
water resources to farmers. They are building pump houses on various canals to supply
water to the farmers. Vaibhav Structurals was the prime contractor and executed the project
of Lift Irrigation Scheme at Balapura, which involved complete design and supply of Motors,
Pumps, Transformer, Pipings, NRVs among other required equipment.

4. Lift Irrigation Scheme

Water Resource Department, Kishanpura

Kishanpura lift scheme is a turn-key project where are all the designing, engineering was
done by Vaibhav Structurals. All the components including Pumps, Motors, Transformer,
Piping, NRVs, and Generators were designed and supplied by Vaibhav Structurals.

5. Transformer Supply and Repair

JVVNL, AVVNL, JdVVNL, Private

AVVNL, JVVNL, and JdVVNL are the three utility companies of the state of Rajasthan. Vaibhav
Group is a registered vendor with all the three companies in the highest class of Vendors,
Class A. At Vaibhav Group we are manufacturing and repairing the transformer for more
than 10 years now and in the past 10 years we have repaired + Manufactured more than
10000 transformers.



6. Steel Structure supply

JVVNL, AVVNL, ABB, LnT, RPG, Kalptaru

In the past 10 years, there has been a drastic change in the electrical infrastructure of the
State of Rajasthan. There were kilometers of transmission line that were drawn to supply
power even to the remotest place of the state.

Vaibhav Structurals was one of the first vendors to supply the requisite steel structure to
meet the growing demands of the state’s utility companies. In the past 5 years we have
manufactured and supplied more than 100,000 MT of steel structures



Products:
On all our projects we supply the material as per the detailed engineering designs. On some of the
project these are designed by us and on some these are designed by the client and its consultants.
Since these are tailor made equipment, technical design is the first phase of every project, designs
submitted by us are then approved by the clients and manufacturing is commenced only upon
receipt of the approval Details for some of the products manufactured and supplied by us are as
below.

1. Transformers
Vaibhav Structurals is involved in manufacturing, supply, installation, testing, commissioning,
and repair of transformers for more than 10 years and has supplied transformers to various govt,
semi-govt and private organizations.

1.1. Distribution Transformers

Vaibhav Group has successfully manufactured, supplied,
installed and commissioned various project including
distribution transformers and all of them are working
satisfactorily. Our minimum fault failures and good
quality material has given us repeat clients and almost
100% clients are repeat clients.

Features
 Able to withstand Short Circuit & Impulse Voltage tests as per IS/IEC
 Powder Coating for excellent finish
 Available as CSP (Completely Self Protected) Type
 Designed to meet customized specifications
 Available as Corrugated Hermetically Sealed Type which is compact in size
 Various ratings type tested from NABL accredited labs

TECHNICAL SPECIFICATIONS
Ratings 1 Phase, upto 11 kV , 25 kVA
3 Phase upto 33 kV, 3000 kVA
Frequency 50/60 Hz
Applicable Standards IS 2026, IEC 76, ANSI.C.57, as per customer requirement
Core Wound or Stack ;
CRGO Steel or Amorphous Metal
Winding Copper
Insulating Fluid Mineral Oil, both inhibited & uninhibited, as per IS/IEC
Class of Insulation Class A
Tap Changer OCTC, OLTC, as per customer requirement

1.2. Power Transformers



Vaibhav Group has been executing various projects at various
thermal power plants, substations involving supplies of Power
Transformer. Being in the industry we understand the
manufacturing process and make sure that our vendors
follow best engineering practices and conduct rigorous tests
to make sure that good quality product is supplied.

Features
 Robust design to take care of frequent short circuits
 Excellent process of shrinkage and drying of coils resulting in a sturdy construction
 Step-up and Step-down transformers manufactured
 Manufactured with prime CRGO using step-lap design for low losses
 Various ratings type tested from NABL accredited labs

Ratings 3 phase, upto 33 kV 20000 kVA
Frequency 50/60 Hz
Applicable Standards IS 2026, IEC 76, ANSI.C.57, as per customer requirement
Winding Copper
Insulating Fluid Mineral Oil, both inhibited & uninhibited, as per IS/IEC
Cooling ONAN, ONAF
Class of Insulation Class A
Tap Changer OCTC, OLTC, as per customer requirement

2. HT Switchgear

HT Switchgear is one our key supplies that we have made in our vast experience of
past 15 years. All the switchgears supplied by us being manufactured using the
industry best parts manufactured by ABB, SIEMENS, etc.

Features:

 Air insulated Metal Clad Construction using high quality steel.
 Durable Epoxy powder coated finish.
 Compartmentalized and compact design.
 Easy accessibility for maintance.
 Meters, Relays and controls located at convenient height.
 Extensible on both sides.
 Side cable box for single panels.
 Compatible with state of the art Numerical protection.
 Fully type tested as per IEC 60298 / IS 3427.
 We can offer outdoor versions also.



TECHNICAL SPECIFICATION OF VACCUM CIRCUIT BREAKER CUBICLES
UPTO 11kV 22kV 33kV
INDOOR INDOOR INDOOR INDOOR INDOOR
Type A 12 62D A 12 63G MYK-12 MYK-24 MYK-36
Rated Voltage kV 12 12 12 24 36
kVrms /
Insulation level 28 / 75 28 / 75 50 / 125 50 / 125 70 / 170
kVp
Rated Current A UPTO 1250 2500 3150 1250 1250
Braking Capacity kA 26.2 40 40 26.2 26.2
650 x 1670 x
Dimensions 2000 /
1000 x 2000 x 1100 x 2000 x 1100 x 2000 x 1500 x2900 x
mm
2100 2300 2300 2400
( WXDXH ) 800 x 1650 x
2000
Degree Of
IP4X IP4X IP4X IP4X IP4X
Protection
Weight Of Each
kG 800 1100 1100 1100 1600
Cubicle

TECHNICAL SPECIFICATION OF SF6 CUIRCUIT BREAKER CUBICLES
UPTO 11kV 22kV 33kV
INDOOR INDOOR INDOOR INDOOR INDOOR
Type A 12 62D A 12 63G A 24 63G A 24 63G S 36 73G
Rated Voltage kV 12 12 12 24 36
kVrms /
Insulation level 28 / 75 28 / 75 50 / 125 50 / 125 70 / 170
kVp
Rated Current A UPTO 1250 2500 3150 1250 1250
Braking Capacity kA 26.2 40 40 26.2 26.2
650 x 1670 x
Dimensions 2000 /
1000 x 2000 x 1100 x 2000 x 1100 x 2000 x 1500 x 2900 x
Mm
2100 2300 2300 2400
(WXDXH) 800 x 1650 x
2000
Degree Of
IP4X IP4X IP4X IP4X IP4X
Protection
Weight Of Each
Kg 800 1100 1100 1100 1600
Cubicle



3. LT Switchgear

LT Switchgear is required on almost all our turn-key projects and
is running smoothly for more than 15 years now. Our supplied LT
Switchgears are tailor made by the manufacturer under the strict
supervision and testing of our dedicated QA Team.

Features:
 Designed to high fault levels upto 65 KArms
 Provision of electrical and mechanical interlocking of security
 Assembling of switchgear and bus bars ensures liberal spacing for cabling, access and maintenance
 PCC enclosures fabricated using strong CRCA sheet steel

Types:
 Motor Control Center
 Control Desk
 Distribution Board
 Feeder Pillar

Construction Modular and Fixed Type
Max Rated Current Upto 8000 Amp, 65KA
System Voltage 440 Volt
Rated Insulation Voltage 690 Volt
Ambient Temperature 50 deg C
Type tests performed at CPRI Short Circuit with standard 65KA Temperature Rise with standard
Degree of Protection.
(Vendor’s)



4. Switchyard Equipments

As Vaibhav Group, we have executed more
than 15 switchyard projects upto 33KV
where we have executed the projects on
turn-key basis. Being a turn-key provider we
supply all the equipments that are required
for the execution of such projects.

Below are some of the important switchyard / substation equipment’s supplied by us:

4.1. Tn Line Towers

At Vaibhav Group we have our own designing team capable of
designing the towers as per the projects requirements. We have
designed, manufactured, and supplied more than 5000 transmission
line towers in the past 5 years. Vaibhav Group is one of the few A-Class
Vendors of towers to the state electricity board and has supplied more
than 2000 towers in a month for their urgent requirements.

Features:

 Manufactured using MS / GI Steel
 Available for both single circuit and double circuit transmission line
 Comes with necessary additional items like Butt joints, and Cross Arms
 Tested at various laboratories across India and by various agencies like RITES, ERDA, among
others



4.2. Isolator

As the name suggests, isolators are basically disconnectors, used
for protection from Faults in High Voltage Installations normally
used horizontally at our various project sites. All the isolators
supplies by us have been working satisfactorily.

Features:

 The moving contact blade is an Aluminum /copper tube with special copper profile with a bimetallic
strip fitted with silver plated copper contacts.
 The stationary contacts are silver plated copper, spring loaded to maintain constant contact pressure
 The electrical contact system is easily and quickly replaced should it be damaged due to a fault
current or damaging event.
 Range of Terminal connectors to suit current requirements.
 Robust design and construction
 Encapsulation of rotary pedestals and heads
 No significant changes of contact resistance over many years of services
 Constant contact pressure
 Stable rotary pedestals ensure no insulator deflection even with high static load

Current Ratings 400 Amps, 630 Amps, 800 Amps, 1250 Amps, 2000 Amps, 2500 Amps, 3150
Amps, 4000 Amps
Voltage Ratings 12 KV, 36 KV, 72.5 KV, 110 KV, 145 KV, 245 KV, 420 KV, 765 KV
Standards IEC 62271-Part-102-2002 or IS 9921 / 9920, IEC -129 and IEC 694 and most
international standards
Types  Center Break,
 Double Break Turn and Twist
 Double Break Banging
 Vertical Break
 Semi Pentograph
 Pentograph
Tests Routine Tests may be conducted



4.3. Dropout fuse

We have installed drop out fuses as important safety device for
small distribution transformer. The drop out fuse opens the
circuit and serves the mechanical isolation of system in case of
flow of fault current. Wherever we have installed these, they are
practically maintenance free as they required duly replacement
of fuse element.

Features:

 Robust design and construction
 Fiber glass tube with both end tinned with non-ferrous metal parts
 Phosphor Bronze contact

Rated Voltage Rated Current BILL (KV) Creepage Interrupting Current
(KV) (Amps) Distance
Asym (A) Sym(A)
UPTO 12 100 A 75 320 4000 2800
15.5 to 24 100 A 95/125 625 8000 5000
30 to 38 KV 100 A 150 900 8000 5000



4.4. Lightening Arrester

We have most widely used Station Class Lightening Arresters on
many of our turn key projects for the protection of station
transformer and switchgears.

Features:

 Highly non-linear MOV.
 Explosion Proof - Pressure Relief Design.
 High energy handling capacity.
 Glazed brown Porcelain Housing.
 Corrosion proof Aluminum alloy metal flange.
 Suitable for Ambient -400C to +550C.
 Absorbs temporary overvoltage and switching surges
 Effective in long discharge periods

Current Ratings 10000 – 20000
Voltage Ratings 3 – 245
Line Discharge 1~4
Standards For Pressure Relief Capacity: IEC 60099-4 and IS-3070-Part III-1993
Tests Routine Tests may be conducted



4.5. Neutral Grounding Resistors

We have installed NGRs on our River Water System for Power
Generation Plant Project, between the neutral & the earth so that it will
limit the earth fault current to a safe value [ Normally full load current of
the generator, transformer, etc.] thereby protecting the transformer,
generator system.

Current Ratings Initial current that flows when cold and is equal to system’s full load
current. Designed as per system’s requirement.
Voltage Ratings Line to Neutral Voltage: = System Voltage / √3 . Designed as per
system’s requirement.
Short Time Rating 10 / 30 / 60 seconds
Continuous Rating 5 – 10% of full load current
Standards o IEEE-32, IS-3043 & BS 162 for neutral grounding resistor.
o IS 2147 or IS 12063 of 1987 for degree of protection for
enclosure.
o IS 5 for paint shade.
o Any other standard as required.
Test Routine Tests:
Visual and Dimensional, Meger test using 1000V Meger,
Resistance measurement.

Special Test:
Temperature Rise Test – Conducted at CPRI Bangalore for
continuous and short time ratings.
Protection Test – ARAI, Pune for IP 33, IP55, and IP65 as per
IS2147 or IS12063 of 1987

Any other test if required can be conducted.



4.6. GSS Switchyard Structure

Along with the transmission line tower there are other many
other steel fabricated items like substation structure. This
consists of various clamps, channel, mounting structure, etc.

At our manufacturing units, we manufacture all the substation
structure items using MS / GI steel. All these are manufactured
as per clients’ designs and are further tested for the chemical
and mechanical tests at a third party labs. Our manufactured
items are inspected and approved by various third party agencies like RITES, among others in India.

A list of such items is as below:
1. Cross Arms
2. Top Hampers
3. Clamps
4. Mounting Channel
5. Others, as per project requirement



5. Cable

Cables are the most essential component of any electrical project,
though not the costliest product but yes without cables can anything be
done? No. There are vast varieties of cables in severals of thousands of
kilometers are used by us of including PVC / XLPE Power Cables, Control
Cables, Control and Instrumentation Cables, including various other
cable types.

Our vendor is into cable manufacturing for more than 4 decades now
and has production facility that facilitates any rating and any standard.
Recently we have offered cables to some of potential international customers where we are getting
the cables manufactured as per their specifications and as per their choice of standards.

Factors/ Grounds for Cable selection:
1. Maximum operating voltage
2. Fault Level
3. Load to be carried
4. Possible overloading duration and magnitude
5. Route length and voltage drop
6. Mode of installation considering installation environment such as ambient & ground temperature
chemical & physical properties of soil.
7. Flame retardant properties



6. ACSR/AAC Conductor

ACSR stands for Aluminum Conductor Steel Reinforced and AAC
stands for All Aluminum Conductor. AAC and ACSR conductor is very
widely used in many of our substation projects. Recently we have
used a huge quantity of ACSR conductor our River Water System turn
key projects in Rajasthan India.

Our vendor is a renowned brand globally who not only maintains
good quality but is also a member of various standardizing committees like Bureau of Indian
Standards. Their products are tested and certified at various laboratories worldwide, some of the
names are NETFA -South Africa, CESI - Italy, EDF - France, ERDA - Vadodara, India, NSIC - Kolkatta,
India, CPRI -Bangaluru, India and Tag Corporation - Chennai, India for conductors of 500 kV HVDC &
800 kV AC transmission system and also for distribution conductors of Metropolitan Electricity
Authority, Bangkok.

We have been associated with our vendors for more than 15 years and have been satisfactorily using
their products for such a long time. Widely used categories include Weasel, Dog and CANNA ACSR
Conductors.

Factors/ Grounds for Conductor selection:
1. Maximum operating voltage
2. Fault Level
3. Load to be carried
4. Possible overloading duration and magnitude
5. Route length and voltage drop
6. Mode of installation considering installation environment such as ambient & ground temperature
chemical & physical properties of soil.
7. Flame retardant properties



7. Insulators

Insulators are widely used on all our transmission line projects. Two
important classifications of the insulators that are widely used are Pin
Insulators and Disc Insulators. Made up of Porcelain, Polymer, Wood or
Glass is used to isolate a wire from physical support (pole).

Working Voltage Working voltage depends on the project
requirements. Indian standard voltage levels
chosen are 11KV, 22KV, 33KV
Strength Pin:
10 KN

Disc:
45 KN, 70KN
Standards Mostly as per
IS:731, BS:137,IEC:383



Clients

Some of our Esteemed Clients:

Vaibhav Structurals | Vabihav Power | Colnovation Technologies

Head Office: 1 – Ra- 11 Vigyan Nagar, Kota, Rajashan

Plant 1: H1/6(B) Electronic Complex, Road No. 1, Indraprust Industrial Area, Kota, Rajasthan

Plant 2: A-94(A), Road No.2, Indraprust Industrail Area, Kota, Rajasthan

Colnovation Technologies: 1(B), Minto House, Mission Compound, C-Scheme, Jaipur

Development Center: IT 2008, Ramchandra Pura Industrial Area, Sitapura Extn., Jaipur

www.vaibhavgroup.com www.colnovation.com


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