TECHNICAL
CATALOG
ADDRESS
Z.a.c 02 , Ain oulmene
Setif / Algeria
CONTACTS
Mail : sales.manager@utec.com.dz
Tél : +213-560-895-137 / +213-660-649-860
Web : www.utec.com.dz
Contents
INTRODUCTION 4
ELECTRICAL SPECIFICATIONS5
TECHNICAL FEATURES7
BUSHINGS8
STANDARD PRODUCTS9
ACCESSORIES10
TESTING11
GROUND MOUNTED TRANSFORMER
12
POLE MOUNTED TRANSFORMER
13
TRANSFORMER FOR PACKAGE SUBSTATION
13
3
TECHNICAL
CATALOG
United technology Electric Company (UTEC) is an Algerian company specializing in the production of all types of electrical transformers and all power. The transformers comply with all international
standards and are approved by SADEG.
Within the framework of improving its positioning on the market of manufacture of the electric transformers and to ensure its
perenniality, SARL UTEC sets up a system of integrated management
"SMI" (quality, environment and health and safety at work) according
to the requirement of the standards ISO 9001 v 2015,
ISO 45001 v 2018 in order to consolidate the organization, to improve
the management of the activities, to adapt to the needs and waitings
of the customers and the other relevant interested parts.
The company produces electrical transformers, these transformers are different accordingto size: small, medium, large and according to type.
This product goes through several stages to reach the final
stage, these stages we will try to summarize:The winding stage,
which starts from the insulators section as a raw material, is pressed
with high pressure and then low pressure. It is high and includes
health, safety and quality conditions. It is transferred to the mechanics department, so the various parts that make up the transformer
are welded, the fins are placed, and then painted, so that the product
is ready and marketable.
4
ELECTRICAL SPECIFICATIONS
STANDARDS
IEC 60076 and IEC 60354
CONSTRUCTION
Corrugated or rigid tank, hermetically sealed with or without gas
cushion.
Immersed in mineral oil (IEC60296 - Class I)
Natural cooling: ONAN (KNAN can be provided on request)
WINDING
Both HV and LV windings are made of copper (Aluminum on
special request)
High Voltage winding: Delta connected.
Low Voltage winding: Star connected with neutral brought out.
Connection Group: Dyn11
Other configurations like: YNd11, YZn11 ...etc, can be provided
TEMPERATURE RISE LIMITS
Maximum ambient temperature: 55°C (Standard 50°C).
Temperature rise of top oil: 40-60 °C (as per customer request)
standard 45°C.
Avg. Temperature rise of windings: 45-65 °C (as per customer
request) standard 50 °C.
ELECTRICAL CHARACTERISTICS
Frequency: 50 or 60 Hz
High Voltage:
- per customer request. (Up to 36 kV class)
Low Voltage (at no load):
- Most used values: 400 V
- We may supply any voltage required by our client.
- Tapping on HV side (by off-load tap changer): +/-2.5% +/- 5% (we may also supply any tapping required by client).
- Short Circuit withstand time = 2 seconds. (5 sec shot on customer request)
Impedance voltage:
- As per IEC 60076 - 5 or as per customer request
5
TECHNICAL
CATALOG
State of the art design tools and engineering capabilities enable UTEC to fulfill
most stringent requirements.
6
TECHNICAL FEATURES
WINDINGS
Fig.1
Both the Low Voltage and High Voltage windings (Fig.2) are
made of copper. (Aluminum winding can also be provided
upon special request). The high Voltage winding is wound
directly on the Low Voltage winding, with insulating paper
and cooling duct, between the two windings. Most modern techniques are used to provide adequate short circuit
strength.
CONSTRUCTION
Tank construction can be of any type mentioned below.
Hermetically Sealed without gas cushion.
Sealed with gas cushion.
Conservator type with breather.
Cooling with radiator
Magnetic Circuit
Fig.2
MAGNETIC CIRCUIT
The magnetic circuit (Fig.1) is made of a high quality cold
rolled, grain oriented silicon steel strips. Each strip is insulated from both sides by Carlite and is cut with an angle 45°
step lap and conventional mitered joint stacking is employed to reduce
the no-load losses and the exciting current.
STANDARDS
Transformers are manufactured according to IEC 60076.
In general and in particular as per concerned Utility / Client
specifications.
Windings
Fig.3
TAP CHANGER
Tappings are provided on the HV windings (number and
step according
to client requirements) with standard values of ±2.5% & ±5%.
The step change from one tapping to another is done by
operating an offload tap changer. Padlock for tap changer
handle can be provided.
OIL TYPE
Transformers are supplied filled with mineral oil according
to IEC 60296 - Class I. In addition Silicon or Midel oil can be
provided on request.
Tap changer / voltage selector handle ( lockable )
7
TECHNICAL
CATALOG
BUSHINGS
High voltage bushings
DIN type, made of porcelain
Plug-in type
BS type
Low voltage bushings
DIN type, made of porcelain
8
Epoxy Bus bar type
Mono block
TECHNICAL DATA OF POWER TRANSFORMERS 36KV
Power
(KVA)
full (Hz)
losses
75° C (w)
Vcc%
noise
level
length
(mm)
width
(mm)
height
(mm)
OIL
Mass
(kg)
total
mass
100
50
2340
4,4
55
960
795
1453
175
750
160
50
3330
4,5
61
1207
799
1572
210
940
250
50
4320
4,5
64
1387
800
1588
265
1100
400
50
6210
4,5
67
1496
911
1588
380
1550
630
50
8820
6
69
1750
980
1598
450
2020
800
50
8900
6
55
1706
996
1820
450
2020
1000
50
10500
6
59
2016
1046
1880
650
3030
1250
50
15000
6
59
1733
1176
1790
730
3360
1600
50
18400
6
69
1900
1350
1850
900
4100
2000
50
22000
6
63
1966
1376
1965
1035
5030
TECHNICAL DATA OF POWER TRANSFORMERS 10KV
Power
(KVA)
full (Hz)
losses
75° C (w)
Vcc%
noise
level
length
(mm)
width
(mm)
height
(mm)
OIL
Mass
(kg)
total
mass
100
50
2100
4
60
946
664
1139
115
560
160
50
2350
4
60
1092
744
1313
165
830
250
50
3250
4
65
1202
776
1315
175
990
400
50
4600
4
65
1322
854
1313
240
1340
630
50
6500
6
54
1536
946
1425
360
1900
800
50
850
6
55
1626
996
1547
430
2240
1000
50
10500
6
56
1716
1046
1647
485
2500
1250
50
13500
6
57
1740
1635
1620
790
3380
1600
50
17000
6
60
1915
1715
1950
810
4000
2000
50
21000
6
65
1765
1270
1750
920
4800
9
TECHNICAL
CATALOG
ACCESSORIES
Fig.1
Fig.2
STANDARD ACCESSORIES
—Earthing terminals on tank bottom (Fig.1)
—Oil drain valve (Fig.2)
—Lifting lugs (Fig.3)
—Bi-directional rollers (Fig.4)
—Top oil thermometer with a maximum
indicator (Fig.5) (with or without contacts)
—Pressure relief device (Fig.6)
(with or without contacts)
Earthing terminal
Fig.3
Oil darin Valve
Fig.4
—Oil level indicator: vertical float type :(Fig.7)
—Dial type (Fig.8)
OPTIONAL
—Buchholz relay
—Silica gel Breather
Lifting lug
Adjustable roller
—Winding temperature indicator with contacts
—DGPT2 multi-function protection relay
(Fig.9) that detects and signals:
Fig.5
Fig.6
——— Reduction of oil level
——— Presence of gas
——— Over temperature
Fig.9
Top oil thermometer
Fig.7
DGPT2 multi-function
protection relay
10
Oil level indicator:
vertical float type
Pressure relief device
Fig.8
Oil level indicator:
dial type
TESTINGS
On each manufactured transformer the following routine tests will be conducted, in
accordance to IEC 60076 prior to final inspection and dispatch to customer.
ROUTINE TESTING
Measurement of the turns ratio and phase displacement.
Measurement of Insulation resistance.
Measurement of winding resistance.
Separate source voltage witHstand test.
Induced over voltage withstand test.
Measurement of no load loss and magnetizing current.
Measurement of short circuit impedance and Load loss.
Dielectric strength test of Insulating oil.
Following type tests and special tests can be performed, as per the design/customer
request, according to the related IEC standards.
TYPE TESTS
Temperature Rise Test. (Internal).
Lightning Impulse Test
Utec transformers have been subjected to special test performed by KEMA-Netherland and King
SPECIAL TESTS
Sound Level Test. (Internal + External)
Short Circuit Withstand Test. (International Laboratories)
11
TECHNICAL
CATALOG
GROUND MOUNTED TRANSFORMER
RIGID TANK WITH RADIATOR 500 kVA to 3150 kVA RATED VOLTAGE ≤ 36 KV
DESCRIPTION LIST
1- HV BUSHING
2- LV BUSHING
3- 5 - POSITION OFF - CIRCUIT TAP SELECTOR
4- PRISMATIC OIL LEVEL INDICATOR
5- DIAL TYPE OIL THERMOMETER WITH 2 CON
TACTS
6- PRESSURE RELIEF DEVICE WITH 2 CONTACTS
7- DRAIN VALVE WITH SEALING PLUG
8- RATING & DIAGRAM PLATE
9- UNIT LIFTING LUGS
10- EARTH LUG WITH M12 BOLT
11- SKID UNDER BASE
12- RADIATORS
13- LOGO PLATE
14- HV CABLE BOX
15- LV CABLE BOX
16- JACKING PADS
17- THERMOMETER POCKET
18- FILTER VALVE WITH SEALING PLUG
With conservator & breather 100 kVA to 3150 kVA. Rated Voltage ≤36 KV
DESCRIPTION LIST
1- HV Plug-in bushing
2- LV bushing
4- Dial type oil thermometer
5- Pressure relief device with sealing
6- Drain valve with sealing plug
7- Rating & diagram plate
8- Unit lifting lugs
9- Earth lug with m12 bolt
10- Base channel
11- Side cooling, flexible fins
21- LV extension bus bar
12- End cooling, flexible fins
22- LV bus bar support
13- Logo plate
23- Conservator tank
14- LV phase markers
24- Prismatic oil level indicator
15- HV phase markers
25- Double flanged ball valve
16- Trunking HV & LV removable
26- Silica gel breather
17- LV cable box
27- Conservator oil drain valve
18- HV cable box
28- Conservator filler stack with
19- LV cable support
r1” blug
20- HV cable support
29- Buch holz relay
12
POLE MOUNTED TRANSFORMER
WITH LV CABLE BOX, HV BUSHING TOP MOUNTED100 kVA to 300 kVA. RATED VOLTAGE ≤ 36 KV
DESCRIPTION LIST
1- HV BUSHING
2- LV BUSHING
3- 5 - POSITION OFF - CIRCUIT TAP SELECTOR
4- FILLER STACK WITH LEVEL INDICATOR
5- DIAL TYPE OIL TEMPERATURE THERMOMETER
6- PRESSURE RELIEF DEVICE
7- DRAIN VALVE WITH SEALING PLUG
8- LV CABLE BOX
9- RATING & DIAGRAM PLATE
10- LV CABLE SUPPORT
11- UNIT LIFTING LUGS
12- EARTH LUG WITH M10 BOLT (STAINLESS
STEEL)
13- LV PHASE MARKERS (HV MARKERS ON LID)
14- ANGLE FEET WITH 2 SLOTS 17 x 120
15- END COOLING, FLEXIBLE FINS
16- ARRESTER BRACKET
17- LOGO PLATE
TRANSFORMER FOR PACKAGE SUBSTATION
ALL ACCESSORIES ON FRONT SIDE100 kVA to 1500 kVA. RATED VOLTAGE ≤ 13.8 K V
DESCRIPTION LIST
1- HV BUSHING
2- LV BUSHING
3- 5 - POSITION OFF - CIRCUIT TAPSELECTOR
4- FILLER STACK WITH OIL LEVEL INDICATOR
5- DIAL TYPE OIL THERMOMETER
6- PRESSURE RELIEF DEVICE
7- DRAIN VALVE
8- RATING & DIAGRAM PLATE
9- UNIT LIFTING LUGS
10- EARTH LUG WITH M12 BOLT
11- BASE CHANNEL WITH TWO SLOTS 17 x 40
12- SIDE COOLING, FLEXIBLE FINS
13- LOGO PLATE
14- END COOLING, FLEXIBLE FINS
15- FLANGE LV BUSHING
16- FLANGE HV BUSHING
17- LV & HV PHASE MARKERS
13