This document is a technical manual for Hartek Distribution Transformers from 2015-2016. It outlines various features of Hartek transformers including over 25 years of experience, patented designs, compliance with standards, and in-house testing facilities. Special features of Hartek transformers are described such as automatic winding tightening systems, magnetic core testing without opening the transformer, Buchholz relay sensitivity, residual drain plugs, core testing at 5kV, jointless gaskets eliminating oil leakage, and an 18-24 month warranty against defects. The manual provides information on transformer design, GTP (guaranteed technical particulars), quality assurance, testing procedures, customer benefits, and applications.

1.
HARTEK
DISTRIBUTION
TRANSFORMERS
Technical
Manual
2015-­‐16

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1. Why
HARTEK
Transformers?
2. Special
Features
3. Transfomer
Design
4. GTP
5.
Quality
Assurance
6. Test
Performed
7. Customer
Benefits
8. Applications
Contents

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Why
HARTEK
Transformers?
v Over
25
years
of
experience
in
Transformer
Industry
v Patent
design
and
infrastructure
v Incorporated
new
features
which
are
not
being
presently
offered
v 3000
+
customers
v Complying
to
all
Indian
&
International
standards
v All
in-­‐house
testing
facilities
v Complete
After
Sales
Support
v The
products
engineered,
manufactured
and
supplied
by
the
company
are
well
appreciated
and
accepted
by
experts
in
the
field
of
power
system

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With
an
extensive
research
on
transformers
by
experinced
professional
having
more
than
40
years
of
experience
in
designing
of
transfomers.
HARTEK
has
incorporated
all
new
features
in
it’s
transformers,
to
add
value
to
their
customers
and
make
them
“MAINTENANCE
FREE”
Special
Features
of
HARTEK
Transformers
Description
HARTEK
Transformer
Tightening
of
windings
Not
Required.
Transformers
are
provided
with
auto
tightening
system
inside.
Testing
of
Magnetic
Circuit
(Core)
Brought
out
on
tank.
Health
of
core
can
be
checked
without
opening
the
transformer
Buchholz
relay
sensitivity
Conforming
to
IS-­‐2026.
Care
has
been
taken
to
install
buchholz
pipeline.
5D&
3D
dimensions
are
maintained
Residual
Drain
Plug
Can
empty
total
oil
and
removal
of
sludge
after
15-­‐20
years
Core
Tested
at
5
KV
(Magnetically
a
stronger
transformer)
Oil
leakage
Non-­‐existing,
as
joint-­‐less
gaskets
are
used.
Warranty
against
manufacturing
defects
18/24
months
SPECIAL
FEATURES

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Transformer
Design

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1
BRAND HARTEK
2 SERVICE : OUT-DOOR
3 kVA RATING UPTO 3000KVA
4 RATED VOLTAGE : a) HV : KV Upto 33
b) LV : KV 0.433 or As desired
5 RATED FREQUENCY : Hz 50 Hz
6 NO. OF PHASES : 3
7 CONNECTION SYMBOL : Dyn11 or As desired
8 TAPPINGS : a)RANGE: +5%
To
-­‐5%@2.5%,
b) NO. OF STEPS / TAPS: 4/5
c) FOR : HV VARIATION
9 REFERENCE MAX. AMBIENT TEMP. IN DEG C : 50 °C
10 TYPE OF COOLING : ONAN
11 B) INDUCED OVER VOLTAGE IN kV: a) HV: 22
b) LV: 0.866
12 EQUIPMENT FOR ONAN COOLING
RADIATORS MOUNTED ON TANK : YES
13 OFF CIRCUIT VARIATION : a) TAP SWITCH : YES OCTC
b) LINK : N.A.
14 TERMINAL ARRANGEMENT :
a) HV : Open Bushing
b) LV : Open Bushing
15 Accessories 150mm OTI with double potential free
contacts / Ex vent/ Radiators/ Breather/
Prismatic oil gauge
16 Paint shade 631/632 as per IS:5
OR Pl specify
17 REFERENCE STANDARDS :
a) TRANSFORMERS : IS – 2026
b) OIL : IS – 335
c) BUSHING : IS – 2099/ IS-3347
d) LOADING : IS – 6600
The
above
are
basic
standard
parameters,
detail
GTP
shall
be
provided
at
time
of
offer.
Technical
Parameters

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We
at
“HARTEK”
believe
in
“COMPLETE
TRANSPARENCY”
with
our
customers.
All
material
that
will
be
used
for
manufacturing
HARTEK
TRANSFORMERS
there
sourcing
will
be
shared
with
propoer
certificates
and
inspection
audit
can
aslo
be
done.
Sno
Part
View
Features
1
CORE
“THE
HEART”
-­‐ Prime
core
with
Certificate
and
all
inspection
audit
can
be
done
-­‐ Low
loss
Silicon
Core
-­‐ Mitred
Joint
-­‐ Core
tested
at
5KV
for
better
magnetic
strength
2
WINDING
“
THE
BRAIN”
-­‐ High
Quality
of
Cu
used,
vendors
can
be
inspected
-­‐ All
types
of
winding
can
be
given
-­‐ Seasoned
&
pre-­‐compressed
before
assembly
-­‐ Winding
dislocation
can
be
provided
3
INSULATION
“NERVOUS
SYSTEM”
-­‐ Own
factory
to
manufacture
solid
insulation
-­‐ Least
shrinkage
factor
-­‐ Low
moisture
level
-­‐ All
class
A/B/F/H
Insulation
can
be
given
4
TANK
“THE
SHIELD”
-­‐ Fully
insulated
from
inside
-­‐ Fit
for
full
vaccum
-­‐ Sealed/Corrugated/e
Quality
Assurance

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The
most
important
step
once
the
transfomer
is
made
is
to
check
all
it’s
paramters
by
conducting
various
tests
on
it.
All
our
testing
is
done
in-­‐house
with
a
state
of
art
facility.
These
are
basic
test
we
perfom
on
the
trasnfomer
Note
–
All
type
tests
can
be
performed,
that
will
be
on
special
request.
S.No.
Type
of
Test
Performed
1
Ratio
2
Polarity
3
Vector
group
4
DC
winding
resistance
measurement
5
Open
circuit
6
Short
circuit
test
7
Separate
source
HV
test
8
Induced
over-­‐voltage
test
at
100
Hz
9
Oil
test
lab
for
Moisture
content,
Acidity,
Specific
resistance
10
Temp
rise
test
11
Special
tests
on
OLTC
Testing
of
Transformers

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Utilities Industry
APPLICATIONS
Buildings

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Hartek
India
Pvt
Limited
Works-­‐
F322,
Phase
8-­‐B
Industrial
Area
Mohali-­‐
160077,
Punjab.
India.
Corporate
Headquaters-­‐
Sco
13,14,15,Sector
34-­‐A
Chandigarh.