ABB Power Products - Medium & High Voltage Transformers Cast Resin Trasformers ABB Power Products ABB TDC voltage transformer for medium voltage systems has all parts of its primary winding, including terminals, insulated from the earth at a level corresponding to its rated insulation level . Indoor dry type, cast resin insulated medium voltage (MV) transformer for measuring and protection with up to 2 secondary windings. Cast Resin Transformers are constructed with their HV high voltage windings encapsulated in resin and are an excellent alternative to traditional oil immersed transformers. Cast resin transformers encase the windings in epoxy resin : these HV high voltage cast resin transformers simplify installation since they are dry, without cooling oil, and so require no fire-proof vault for indoor installations. The epoxy resin protects the high voltage transformer windings from dust and corrosive atmospheres. ABB TDC Voltage Transformer ABB MV Medium Voltage Transformers - Voltage Transformer Features Indoor dry type, cast resin insulated transformers for medium voltages (MV). ABB transformers are suitable for measuring and protection of MV medium voltages with up to 2 secondary windings. ABB offers a full range of medium voltage (MV) and high voltage (HV) transformer products and solutions for ANSI, IEC and other local standards. ABB is a major transformer manufacturer throughout the world and offers both liquid-filled and dry-type transfomers for medium and high voltage power distribution, measurement and protection. T&D distribute ABB fuses, vacuum contactors, surge arresters, capacitors, plugs and sockets for LV, MV and HV electrical distribution and cable systems.

1. Medium Voltage Product
TDC 4
Indoor voltage transformers
Highest voltage for equipment
[kV]
3.6 - 12
Power frequency test voltage, 1 min.
[kV]
10 -
Lightning impulse test voltage
[kV]
Max. rated burden, classes
[VA/cl]
40 - 75
25/0.2 - 75/0.5 - 150/1
Description
The TDC 4 voltage, double-pole insulated transformers are
cast in epox resin and designed mostly for insulation voltages
of 3.6 kV to 12 kV.
If no other value is required the transformers are
manufactured with a voltage factor of 1.2 x Un. All the parts
of the primary winding of the transformer are insulated from
the earth, including the terminals, to an insulation level
identical with the rated insulation level. When operating in
a three-phase system the primary inlets of the transformer are
connected across the respective lines, to the phase-to-phase
voltage, mostly in the „V“ type of connection. The majority of
the transformers is equipped with one secondary winding,
intended to be used for either the measurement or protection
purposes. One of the terminals of each secondary winding
has to be earthed during the transformer operation.
If not required otherwise, the secondary winding is lead out
into a cast secondary terminal board.
The transformer may be mounted in any position. The
transformers are fixed by four screws, The M8 bolted
earthing clamp is located on the transformer base plate.
The secondary, sealable terminal board is covered with
a transparent cover made of plastic material.
Rated primary voltages ... 3 kV; 3.3 kV; 6 kV; 6.6 kV; 10 kV;
11 kV
Other primary voltages based on customer‘s request may be
delivered, too.
Rated secondary voltages... 100 V; 110 V – 0.2; 0.5; and 1
accuracy classes (measuring winding), or 3P; 6P (protection
winding)
Other secondary voltages based on customer‘s request may
be delivered, too.
Rated frequency ... 50 Hz; 60 Hz
Design for two primary voltages is also possible, based on
a consultancy to be conducted with the manufacturer (change
over secondary side).
The transformers are manufactured and delivered conformably
to the requirements and recommendations of the following
standards and regulations: IEC, VDE, ANSI, BS, GOST and
CSN.

2. Dimensions
M10x15
100
Pg16
220
14
9
139
116
30
2x
148
188
110
11
96
82
4
338
270
10
(125)
22
20
M8
11
Marking of the voltage transformer outlets
a) Single-pole insulated transformer | b) Single-pole insulated transformer with a tap | c) Double-pole insulated transformer | d) Double-pole insulated
transformer with a tap | e) Single-pole insulated transformer with two secondary windings | f) Single-pole insulated transformer with two secondary windings,
with one of which being the auxiliary (residual) winding | g) Single-pole insulated transformer with two secondary, tapped windings, with one which being the
auxiliary (residual) winding.
2

3. Standartized transformers
Primary
Secondary voltage
voltage,V
voltage,V
accuracy
burden, VA
3000
100
0,2
10,15,25
3000
100
0,5
15,25,50
3000
100
1
50,75,100
3300
110
0,2
10,15,25
3300
110
0,5
15,25,50
3300
110
1
50,75,100
6000
100
0,5
15,25,50
6000
100
0,5
15,25,50
6000
100
1
50,75,100
6600
110
0,2
10,15,25
6600
110
0,5
15,25,50
6600
110
1
50,75,100
10000
100
0,2
10,15,25
10000
110
0,2
10,15,25
10000
100
0,5
15,25,50
10000
110
0,5
15,25,50
10000
100
1
50,75,100
10000
110
1
50,75,100
11000
100
0,2
10,15,25
11000
110
0,2
10,15,25
11000
100
0,5
15,25,50
11000
110
0,5
15,25,50
11000
100
1
50,75,100
11000
110
1
50,75,100
3

4. PPMV Brno
Videnska 117
619 00 Brno, Czech Republic
Tel.:
+420 547 152 602
Fax:
+420 547 152 626
E-mail:
info.ejf@cz.abb.com
+420 547 152 614
www.abb.com
The data and ilustrations in this catalogue are not
binding. We reserve the right to make changes of the
content, in the course of technical development of the
product.
1VLC000522 - Rev 1, en 2010.xx.xx
ABB s.r.o.

5. Medium Voltage Product
TDC 6
Indoor voltage transformers
Highest voltage for equipment
[kV]
17.5 - 24 (25)
Power frequency test voltage, 1 min.
[kV]
38 - 50 (55)
Lightning impulse test voltage
[kV]
Max. rated burden
[VA/cl]
95 - 125
30/0.2 - 100/0.5 - 150/1
Description
The TDC 6 voltage, double-pole insulated transformers are
casted in epox resin and designed mostly for insulation
voltages of 17,5 kV to 24 kV.
Other insulation values are to be the subject of an agreement
between the manufacturer and the customer.
If no other value is required the transformers are
manufactured with a voltage factor of 1.2 x Un. All the parts
of the primary winding of the transformer are insulated
from the earth, including the terminals, to an insulation level
identical with the rated insulation level. When operating in
a three-phase system the primary inlets of the transformer are
connected across the respective lines, to the phase-to-phase
voltage, mostly in the „V“ type of connections. The majority
of transformers is equipped with one secondary winding,
intended to be used for either the measurement or protection
purposes. One of the terminals of each secondary winding
has to be earthed during the transformer operation.
If not required otherwise, the secondary winding is lead out
into a casted secondary terminal board.
The transformer may be mounted in any position. The
transformers are fixed by four screws, The M8 bolted
earthing clamp is located on the transformer base plate.
The secondary, sealable terminal board is covered with
a transparent cover made of plastic material.
Rated primary voltages ... 11 kV; 15 kV; 20 kV; 22 kV
Other primary voltages based on customer‘s request may be
delivered, too.
Rated secondary voltages... 100 V; 110 V – 0.2; 0.5 and 1
accuracy classes (measuring winding), or 3P; 6P (protection
winding)
Other secondary voltages based on customer‘s request may
be delivered, too.
Rated frequency ... 50 Hz; 60 Hz
Design for two primary voltages is also possible, based on
a consultancy to be conducted with the manufacturer (change
over secondary side).
The transformers are manufactured and delivered conformably
to the requirements and recommendations of the following
standards and regulations: IEC, VDE, ANSI, BS, GOST and
ČSN.

6. Dimensions
116
165
M10x15
280
8
93
22
20
Pg16 ‡14
ZEM M8
EARTH
352
285
178
150
14
B V
130
225
A U
96
50
30
‡14
Marking of the voltage transformer outlets
a) Single-pole insulated transformer | b) Single-pole insulated transformer with a tap | c) Double-pole insulated transformer | d) Double-pole insulated
transformer with a tap | e) Single-pole insulated transformer with two secondary windings | f) Single-pole insulated transformer with two secondary windings,
with one of which being the auxiliary (residual) winding | g) Single-pole insulated transformer with two secondary, tapped windings, with one which being the
auxiliary (residual) winding.
2

7. Standartized transformers
Primary
Secondary voltage
voltage,V
voltage,V
accuracy
burden, VA
15000
100
0,2
10,15,25
15000
110
0,2
10,15,25
15000
100
0,5
15,25,50
15000
110
0,5
15,25,50
15000
100
1
50,75,100
15000
110
1
50,75,100
20000
100
0,2
10,15,25
20000
110
0,2
10,15,25
20000
100
0,5
15,25,50
20000
110
0,5
15,25,50
20000
100
1
50,75,100
20000
110
1
50,75,100
22000
100
0,2
10,15,25
22000
110
0,2
10,15,25
22000
100
0,5
15,25,50
22000
110
0,5
15,25,50
22000
100
1
50,75,100
22000
110
1
50,75,100
3

8. PPMV Brno
Videnska 117
619 00 Brno, Czech Republic
Tel.:
+420 547 152 602
Fax:
+420 547 152 626
E-mail:
info.ejf@cz.abb.com
+420 547 152 614
www.abb.com
The data and ilustrations in this catalogue are not
binding. We reserve the right to make changes of the
content, in the course of technical development of the
product.
1VLC000523 - Rev. 2, en 2011, 01.15.
ABB s.r.o.

9. Medium Voltage Product
TDC 7
Indoor voltage transformers
Highest voltage for equipment
[kV]
36
Power frequency test voltage, 1 min.
[kV]
70
Lightning impulse test voltage
[kV]
Max. rated burden, classes
[VA/cl]
50/0.2 - 150/0.5 - 250/1
170
Residual winding
[VA/cl]
50-200/6P
Description
The TDC 7 double-pole insulated voltage transformers are
casted in epox resin and designed mostly for insulation
voltage 36 kV.
Insulation voltages different from the above are to be the
subject of an agreement between the manufacturer and the
customer.
If no a different value is required the transformers are
manufactured with a overvoltage factor of 1.2 x Un.
Both outlets of the primary winding, including the respective
terminal is insulated from the earth to a level which
corresponds to the rated insulation value. Most of the
transformers are equipped with one secondary windings.
One terminal of each secondary winding has to be earthed
during the transformer operation.
The transformer can be mounted in any position. The
transformer are fixed by four screws. The secondary terminal
board is covered with sealable cover.
Secondary wiring
The terminal box is entirely metal and provided with two
detachable threaded inserts, Pg 16. Degree of protection
is IP 30. The terminals are provided with M5 screws for the
termination of the secondary wiring and with throughgoing
holes for direct earthing of the secondary circuit by M6
screws. The terminal cover is sealable.

10. System and test voltages
Primary winding
Type
Highest
voltage
kV
Alternating
test voltage
kV
Impulse test Rated
voltage
frequency
1.2/50 μs, kV Hz
TDC 7
36
70
170
50 (60)
The test voltage of secondary winding is 3 kV (1 min)
Standards
The transformers are manufactured according to the
requirements and recommendations of the following
standards and regulations : IEC, ANSI, VDE, BS, GOST and
ČSN.
Marking of the voltage transformer outlets
Secondary terminals of TDC 7
The double pole models can have max. 4 sec. terminals
Double pole insulated voltage transformers
Type
TDC 7
Primary voltage
25000...36000 V
Terminal marking
A–B
Max. number of secondary windings
2
Secondary voltage
100 V
110 V
Terminal marking
a–b
Accuracy class
Rated burden max. VA
0.2 0.5
1)
1
3
3P
60 150 300 500 300
Secondary thermal limiting current U = 1.2 x Un
max. 8 A
Mechanical strength of primary terminal
5 kN
Weight approx.
72 kg
1) Valid for single measuring winding only.
Available outputs for double meas. wdgs are calculated on request.
2

11. Dimensions
M10
12
320
‡ 30
A
U
B
V
390
Sealable
217
5
20
M8
178
250
421
225
366
14
19
150
14
150
2 pcs Pg 16
Circuit diagram, standard
A
B
a
b
Weight ca. 57 kg
Creepage distance
Arcing distance
3
334 mm
304 mm

12. PPMV Brno
Videnska 117
619 00 Brno, Czech Republic
Tel.:
+420 547 152 602
Fax:
+420 547 152 626
E-mail:
info.ejf@cz.abb.com
+420 547 152 614
www.abb.com
The data and ilustrations in this catalogue are not
binding. We reserve the right to make changes of the
content, in the course of technical development of the
product.
1VLC000536 - Rev. 1, en 2011, 01.15.
ABB s.r.o.