english
EL.PI. CAST-RESIN
CAST RESIN
DISTRIBUTION
TRANSFORMERS
Stemming from
the experience of
Elettromeccanica Piossasco,
established in 1962, EL.PI.
CAST-RESIN, its subsidiary,
launched in 2010 the
manufacture of cast resin
transformers.
Thanks to its recent
establishment EL.PI.
CAST-RESIN can count on
state-of-the art machinery
to ensure the manufacture
of transformers with the
highest standards of
efficiency.
2
Standard features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
DATA PLATE
JUNCTION BOX
PT100 TEMPERATURE SENSORS
primary voltage: up to 24kV;
secondary voltage: up to kV 0,690;
insulation class: up to kV 24;
windings configuration (from kVA100 to kVA 3150): delta/star with
neutral (other upon request);
vector group: Yyn0, Dyn11, Dyn5 (other upon request);
frequency: 50Hz;
core assembled with layers of grain-oriented steel foil;
encapsulated aluminum primary winding;
pre-impregnated aluminum secondary winding;
primary voltage tap changers;
LV terminal plates;
bi-directional rollers;
lifting lugs;
earthing terminal;
n. 3 PT100 temperature sensors connected in a junction box;
electronic temperature monitoring unit;
data plate;
protection grade IP 00.
NEUTRAL TERMINAL
LV TERMINALS
LIFTING LUGS
MV TERMINALS
VOLTAGE REGULATION
MV DELTA CONNECTION
CORE
LV WINDINGS
MV WINDINGS
BI-DIRECTIONAL ROLLERS
EARTHING TERMINAL
3
Core
The core is manufactured with first class Carlite insulated
grain-oriented magnetic steel foil.
Cutting is performed at 45° with CNC machines ensuring
precision and quality.
Cores are mounted on special benches with STEP-LAP
system, through clamps and runners to ensure flawless
overlapping of aluminum sheets.
Core clamping is ensured by sturdy steel sections.
4
Medium voltage windings
Windings feature a circular section and are coaxial to core
columns.
MV windings are made with an aluminum strip encapsulated
in epoxy resin.
This process, in addition to its dielectric qualities, ensures
excellent fire resistance and immediate self-extinguishing
properties as well as high resistance to industrial pollution.
Low voltage windings
Windings feature a circular section and are coaxial to core
columns.
LV windings are made with an aluminum conductor strip
featuring the same height as the winding and a class F
insulation strip, then they are vacuum impregnated in epoxy
resin and finally painted with red insulating paint.
Terminals are built with extruded aluminum flat bars welded
to the conductor along its entire width thus ensuring
minimum contact resistance.
5
Epoxy resin encapsulation plant
Winding supports and spacers
MV and LV windings are secured to transformers’ core frames
by special insulating supports and spacers made in PBT and
fibreglass.
Such supports also ensure windings’ coaxiality in all working
conditions.
6
Environmental and climatic classes
Dry-transformer environmental working conditions are
classified by humidity, condensation, pollution and ambient
temperature.
These factors are crucial not only once the transformers are
operational but also during storage prior to installation.
Our transformers are built in compliance with the following
environmental standards:
E2 Environmental class
Transformers withstand a consistent condensation or intense
pollution or a combination of both phenomena;
C2 Climatic class
Outdoor installation (in a protection enclosure) but not
under direct weather conditions. Transformers are suitable
for operation, transport and storage at ambient temperature
down to -25°C;
F1 Fire class
Transformers subject to fire hazard with reduced flammability
with self-extinguishing characteristics.
International standards
Our transformers are tested in compliance with CEI EN
60076-11.
Tests are performed both during and at the end of the
production process, according to working instructions and
technical department instructions.
Before being put on the market all transformers are tested
in compliance with CEI/IEC standards and test reports are
duly completed.
Final tests, performed in our test room, include all compliance
tests (routine tests) as per standard CEI EN 60076-11.
7
Tests and trials
Our transformers, before being put in the market, are all
tested in compliance with CEI EN 60076-11 standard with
the following routine tests:
• voltage ratio measurement;
• polarity and connection group test;
• insulation test with applied voltage;
• insulation test with induced voltage;
• losses and no load current measurement;
• winding resistance at room temperature measurement;
• measurement of losses and short circuit voltage at
required reference temperature;
• partial discharge measurement.
It is also possible, upon customers’ request (with an extra
charge) to run or repeat both routine tests and type tests,
in addition to special tests, at accredited external boards
facilities (as, for example CESI – Milan Italy).
After-sale assistance is also ensured.
8
Customization
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
primary voltage up to kV36;
dual primary voltage;
dual secondary voltage;
multiple secondary voltage (e.g. for use in photovoltaic
systems);
copper primary and secondary windings;
non-standard losses and voltages (upon request);
non-standard connections and vector groups (upon request);
60Hz frequency;
electrostatic shield between primary and secondary
windings;
MV outer cone elastimold type separable connectors;
air forced fans;
forced air cooling electronic monitoring unit;
digital output RS485 module or analog output 4-20mA
module;
infrared temperature monitoring system (recommended for
MV/MV transformers);
IP 31 protection grade panel enclosure, mounted on the
transformer – RAL 9002 paint;
tropicalization up to +55°C (for installation in countries such
as United Arab Emirates, African countries etc.);
customization for use in arctic weather conditions with
temperatures down to -60° C (e.g. Russia);
surge protection kit (strongly recommended in case of
connection to overhead power lines or lines without surge
protection);
other features upon request.
9
Tree-phase cast-resin transformers
24 kV Series (Insulation classes: Primary winding 24/50/95 kV - Secondary winding 1,1 - 3 kV)
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
2500
3150
530
580
650
780
880
1000
1200
1320
1650
2000
2400
2750
3000
3900
4400
4200
5000
2,0
1,8
1,6
1,5
1,4
1,2
1,1
1,0
0,9
0,8
0,7
0,6
0,6
0,5
0,4
0,4
0,3
2150
2550
2900
3400
3580
4250
5090
5900
6950
8600
10800
12000
14250
18000
22500
23200
24500
2400
2800
3250
3800
4000
4750
5700
6600
7800
9600
12100
13500
16000
20000
25200
25980
27300
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
8
8
LpA
(dB)
48
49
52
53
54
55
56
57
59
60
61
62
63
65
66
65
67
LwA Weight Length Width Height Wheelbase
(dB) (Kg) (mm) (mm) (mm)
(mm)
55
57
62
63
64
66
67
68
70
71
73
74
75
77
79
78
81
600
700
800
900
1050
1150
1350
1500
1700
2000
2400
2850
3350
4000
5000
4800
5800
1100
1160
1250
1250
1350
1400
1400
1460
1460
1500
1550
1650
1700
1800
2000
2000
2100
600
600
600
600
600
750
750
750
850
850
1000
1000
1000
1300
1300
1300
1300
1200
1260
1320
1340
1360
1450
1560
1600
1680
1800
1910
2040
2200
2300
2350
2310
2370
520
520
520
520
520
670
670
670
670
670
820
820
820
1070
1070
1070
1070
17,5 kV Series (Insulation classes: Primary winding 17,5/38/75 kV - Secondary winding 1,1 - 3 kV)
Rated No load No load Losses at Losses at Shortcircuit
Power losses current
75°
120°
impedance
(kVA)
(W)
%
(W)
(W)
%
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
2500
3150
500
540
620
750
850
920
1150
1200
1550
1850
2200
2550
2850
3700
3800
3700
4900
1,9
1,7
1,6
1,5
1,4
1,2
1,1
1,0
0,9
0,8
0,7
0,6
0,6
0,5
0,4
0,4
0,3
2050
2450
2900
3200
3550
4250
5000
6120
7050
8480
9820
11500
14000
17700
21800
22500
24000
2300
2700
3250
3600
4000
4750
5600
6850
7900
9500
11000
12800
15680
19800
24400
25200
26880
5
6
6
6
6
6
6
6
6
6
6
6
6
6
6
8
8
LpA
(dB)
48
49
50
51
53
54
55
56
58
59
60
61
62
64
65
65
67
LwA Weight Length Width Height Wheelbase
(dB) (Kg) (mm) (mm) (mm)
(mm)
55
56
61
62
64
65
66
67
69
70
71
73
75
77
78
78
81
550
620
720
820
980
1100
1200
1400
1600
1900
2300
2650
3200
3850
4700
4600
5800
1000
1090
1160
1220
1310
1340
1280
1370
1400
1460
1520
1550
1640
1700
1920
1950
2120
600
600
600
600
600
750
750
750
850
850
1000
1000
1000
1300
1300
1300
1300
1180
1240
1280
1300
1320
1410
1520
1540
1640
1790
1910
2000
2180
2270
2290
2270
2350
520
520
520
520
520
670
670
670
670
670
820
820
820
1070
1070
1070
1070
12 kV Series (Insulation classes: Primary winding 12/28/60 kV - Secondary winding 1,1 - 3 kV)
Rated No load No load Losses at Losses at Shortcircuit
Power losses current
75°
120°
impedance
(kVA)
(W)
%
(W)
(W)
%
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
480
530
600
730
800
850
1100
1150
1400
1800
2150
2500
2750
3550
3800
4800
1,9
1,8
1,6
1,5
1,4
1,2
1,1
1,0
0,9
0,8
0,7
0,6
0,6
0,5
0,4
0,3
1960
2460
2960
3210
3480
4100
4900
5980
6950
8480
9820
11150
13900
16100
19650
23200
2200
2750
3300
3600
3900
4600
5500
6700
7800
9500
11000
12500
15600
18000
22000
26000
4
4
6
6
6
6
6
6
6
6
6
6
6
6
6
8
LpA
(dB)
46
48
49
51
52
54
55
56
57
58
59
61
62
64
65
66
LwA Weight Length Width Height Wheelbase
(dB) (Kg) (mm) (mm) (mm)
(mm)
53
55
60
62
63
65
67
67
68
70
71
73
74
76
78
80
500
600
700
760
860
1000
1200
1350
1550
1850
2300
2700
3160
4000
4800
5800
980
1020
1150
1200
1200
1250
1250
1300
1400
1450
1500
1550
1640
1700
1900
2100
DATA VALID FOR ALL SIZES
Partial discharges level:
Insulation system class – over temperatures:
Vector group:
Utility frequency:
10
600
600
600
600
600
750
750
750
850
850
1000
1000
1000
1300
1300
1300
1100
1220
1200
1200
1250
1300
1400
1450
1500
1650
1800
1910
2100
2150
2200
2210
520
520
520
520
520
670
670
670
670
670
820
820
820
1070
1070
1070
< 10 pC
F / F - 100 / 100 K
Dyn11
50 Hz
Any technical information detailed in this catalogue is not legally binding. EL.PI reserves the right to amend any specification without prior notice.
Rated No load No load Losses at Losses at Shortcircuit
Power losses current
75°
120°
impedance
(kVA)
(W)
%
(W)
(W)
%
Enclosures
Cast resin transformers enclosures overall dimensions
TYPE
EP01
EP02
EP03
EP04
EP05
EP06
A
1550
1750
1850
2000
2200
2500
DIMENSIONS
B
H
1030
1090
1190
1290
1390
1550
1500
1710
1875
2060
2300
2635
G
520
670
670
820
820
1070
TYPE
VALID ISSUE
RATED POWER
(KVA)
PROTECTION
GRADE
STANDARD
PAINT
EP01
EP02
EP03
EP04
EP05
EP06
April 2003
April 2003
April 2003
April 2003
April 2003
June 2005
50 - 100 - 125 - 160 - 200
250 - 315 - 400
500 - 630
800 - 1000
1250 - 1600
2000 - 2500
IP31
RAL 9002
11
www.immagine3000.it
EL.PI. CAST-RESIN s.r.l.
SS 589 dei Laghi di Avigliana, Km 18
10040 CUMIANA (TO) - ITALY
Phone +39 011 9042132 / +39 011 9042133
Fax +39 011 9065482
www.elpicastresin.com - info@elpicastresin.com