Outdoor ITs

Grid components

Outdoor ITs

Medium voltage outdoor instrument transformers

Protecting an evolving outdoor grid 

Medium voltage outdoor instrument transformers are used for insulation of medium voltage components and to transform voltage or current to standardized measurable values.

ABB’s medium voltage outdoor instrument transformers are cast in hydrophobic cycloaliphatic epoxy resin (HCEP). The HCEP material offers superior arc track, ozone, and ultraviolet-resistive properties while maintaining physical strength. The hydrophobic surface properties of HCEP ensure highly reliable performance in harsh, wet, or humid environments to fully withstand outdoor conditions.

ABB’s medium voltage outdoor instrument transformers (current and voltage), for IEC and other standards, are ideal for various outdoor applications such as medium voltage substations, circuit breaker and switch disconnector installations, pole-mounted metering units and overhead line installations, railway substations and distribution transformers. As part of our portfolio, ABB offers current and voltage outdoor instrument transformers:

  • Outdoor current transformers, up to 52 kV for metering and protection purposes
  • Outdoor voltage transformers, up to 40,5 kV for metering, protection and external power supplies

Built to withstand the rigors of the most demanding environments, ABB medium voltage outdoor instrument transformers are available for original equipment manufacturers (OEM),  Engineering, Procurement and Construction (EPC) partners as well as end-users to incorporate in their own new installations or retrofit and upgrade projects. 

ABB supports customers and partners in staying ahead of increasing electrification needs, technology advancements, and regulatory changes, providing the power to adapt to a rapidly evolving energy landscape.

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ABB's portfolio for outdoor Instrument transformers

IEC & Other standards

Current transformers
Cable & bushing current transformers
Voltage transformers

Outdoor Current transformers

CTR

CTR

CTR, up to 52 kV, are medium voltage outdoor current transformers with a rated short-time thermal current up to 63 kA. CTR current transformers are ideal for medium voltage outdoor and railway substations, structure-mounted outdoor switchgear (SMOS), or outdoor circuit breakers. The CTR transformers are designed as a single primary turn with useful outlets connecting to the medium voltage networks.

Learn more:
 CTR-25_datasheet

For the Manual and other useful product documents, please visit CTR – ABB Library

 

 

 

TPOnew270x175

TPO

TPO, up to 40,5 kV, are medium voltage outdoor current transformers with a rated short-time thermal current up to 100 kA. TPO current transformers are ideal for high-demand applications, such as outdoor substations, overhead line installations and outdoor circuit breakers. TPO are designed as single or multiple turn current transformers, with one transformer ratio, and, if necessary, with the possibility to be reconnectable on the primary or secondary side.

Learn more: 
TPO_datasheet

For the Manual and other useful product documents, please visit TPO – ABB Library

 

KON_175x270

KON

KON, up to 25 kV, are medium voltage outdoor current transformers with a rated short-time thermal current up to 63 kA. KON current transformers are ideal for overhead line installations, pole-mounted units, medium voltage outdoor substations, circuit breakers and switch disconnectors.

Learn more:
 KON-17,KON-24, KON-24_datasheet

For the Manual and other useful product documents, please visit KON – ABB Library

 

kohu new175x270

KOHU

KOHU, up to 24 kV, is a medium voltage outdoor current transformer with a rated short-time thermal current up to 30 kA. KOHU is ideal for medium voltage outdoor switch disconnector.

Learn more:
KOHU_datasheet

For the Manual and other useful product documents, please visit KOHU – ABB Library

 

Outdoor Current transformers

KOKU_group_270

KOKU

KOKU, up to 1.2 kV, are medium voltage outdoor cable current transformers with a rated short-time thermal current up to 100 kA. KOKU cable current transformers are ideal for measuring of phase or residual currents within medium voltage outdoor switch disconnectors (Sectos), overhead line installations, outdoor substations and zero-current measurements.

KOKU are transformers without a primary conductor and primary insulation of its own, which can be mounted over a medium voltage insulated cable(s) or a medium voltage insulated busbar.

Learn more:
 KOKU_datasheet 

For the Manual and other useful product documents, please visit KOKU – ABB Library

 

IMT_175_270

IMT

IMT, up to 0.72 kV, are medium voltage outdoor cable current transformers with a rated short-time thermal current up to 60 kA. IMT current transformers are suitable for measuring of phase currents in low voltage bushings within distribution transformers, outdoor substations and overhead line installations.

IMT are transformers without a primary conductor and primary insulation of its own, which can be mounted on the low voltage side of the distribution transformer.

Learn more:
 IMT_datasheet

For the Manual and other useful product documents, please visit IMT – ABB Library

 

Outdoor Voltage transformers

TJO 7_270

TJO

TJO, up to 40.5 kV, are medium voltage outdoor single pole voltage transformers. TJO are ideal for phase metering and protection in medium voltage applications such as outdoor substations, overhead line installations and pole-mounted units. TJO transformers can be equipped with up to three secondary windings. One or two of these windings are designated for measuring and/or protection applications, while the last one typically connects into an open-delta configuration in a three-phase system.

Learn more:
TJO 6_datasheet
TJO 7_datasheet

For the Manual and other useful product documents, please visit TJO – ABB Library

 

TJO 7_270

VOG

VOG, up to 25 kV, is a medium voltage outdoor single pole voltage transformer. VOG is a lightweight voltage transformer designed for outdoor substations, overhead line installations and pole-mounted units. VOG transformer can be equipped with up to two secondary windings. The first one is used either for measuring or protection purposes, the other connects into an open-delta configuration in a three-phase system.

Learn more:
 VOG-24_datasheet

For the Manual and other useful product documents, please visit VOG – ABB Library

 

TDO_175x270

TDO

TDO, up to 25 kV, is a medium voltage outdoor double pole voltage transformer. TDO is ideal for high-demanding applications within external power supplies, overhead line installations, switch disconnector, and outdoor substations. TDO transformers can be equipped with up to two secondary windings used for line-to-line measurement, protection or for external power supply.

Learn more:
 TDO 6_datasheet

For the Manual and other useful product documents, please visit TDO – ABB Library

 

 

VOL 40.5_270

VOL

 VOL, up to 40.5 kV, are a medium voltage outdoor double pole voltage transformers. VOL are ideal for line-to-line circuits and external power supplies, overhead line installations, switch disconnectors, and outdoor substations.  VOL transformers can be equipped with up to two secondary windings used for measurement, protection or external power supply.

 Learn more:
VOL-24_datasheet
VOL-40,5_datasheet

For the Manual and other useful product documents, please visit VOL – ABB Library



Product scope

Click the arrow to learn more about product scope.

 CTRTPOnew270x175KON_175x270kohu new175x270KOKU_group_270IMT_175_270
  CTRTPOKONKOHUKOKUIMT
Max.rated voltageCTR-25   52 kV
TPO 6   25 kV
TPO 7   40,5 kV
KON 17.5   17,5 kV
KON 24   25 kV
KOHU 24   24 kV 
KOKU 072   0,72 kV
KOKU 1   1,2 kV
IMT 0,72 kV
Max.rated
primary current
3 000 A3 000 A 
1 875 A
600 A
800 A
10 000 A

1 000 A
Max.rated short-time current
63 kA / 1 s
100 kA / 1 s 
63 kA / 1 s
30 kA / 1 s
63 kA / 1 s 
25 kA / 3 s 
Max.quantity of
cores
4 cores 4 cores 2 cores 1 core1 core
3 cores 		1 core
Standards
IEC, EN, VDE, ČSN, PN, AS, BS, GOST
IEC, VDE, ČSN, PN,
AS, BS, DSTU, GOST
IEC, VDE, ČSN, PN,
AS, BS, GOST,
IEEE, CAN/CSA
IEC, VDE, ČSN, PN,
AS, BS, GOST
IEC, VDE, ČSN, PN,
AS, BS, GOST,
IEEE, CAN/CSA
IEC, VDE, ČSN, PN, AS, BS, GOST
Applications
Outdoor and railway
substations, structure
mounted outdoor
switchgear (SMOS),
auto transf. feeder
stations
MV outdoor
substations, overhead
line installations,
outdoor circuit breakers
Overhead line
installations, polemounted
units, MV
outdoor substations,
circuit breakers, switch
disconnectors
Designed for MV
outdoor NPS switch
disconnector
Switch disconnector
(Sectos), overhead line
installations, outdoor
substations, zerocurrent
measurements

Distribution
transformers,
transformers, outdoor
substation, overhead
line installations
Features
HCEP, IP55, long creepage distance,
compliant with railway
EN 50152-3-2 standard
HCEP, IP54, long creepage distance, opt.
primary or secondary
reconnection, opt. NEMA primary terminals
HCEP, IP54, lightweight
products,
vertical or horizontal
installations, opt. reconnection on prim. or secondary side

Hydrophobic
cycloaliphatic epoxy resin (HCEP), weight only 7 kg
HCEP, IP54, inner Ø 33~500 mm, length up
to 300 mm, opt. sec. reconnection, opt. C5H for a high
corrosivity environm.
HCEP, IP44, inner Ø 53, 73 or 95 mm,
weight up to 10kg, two
secondary wires 4-6 m long

 

 TJO 7_270TJO 7_270TDO_175x270VOL_175x270
VOL 40.5_270TJR
 TJOVOGTDOVOLVOLTJR
Max.rated voltage
TJO 6    25 kV
TJO 7    40.5 kV
VOG-24   25kV
TDO 6    25 kV 
VOL-24   24 kV
VOL-40.5   40,5 kV
TJR-25   27,5 kV
Max.rated
primary voltage
36 000: √3 kV
22 000:  √3 kV
22 000 kV
22 000 kV

38 000 kV
27 500 kV
Min.rated voltage factor1,9x Un / 8h
1,9x Un / 8h
1,2x Un /
Continuous

1,2x Un /
Continuous
 
1,2x Un /
Continuous

1,9x Un / 8h

Max.quantity of windings
3 windings 2 windings2 windings2 windings 2 windings2 windings 
Standards
IEC, VDE, ČSN, PN, 
AS, BS, GOST,
IEEE, CAN/CSA
IEC, VDE, ČSN, PN, AS, BS, GOST, IEEE, CAN/CSA
IEC, VDE, ČSN, PN, AS, BS, GOST
IEC, VDE, ČSN, PN, AS, BS, GOST, IEEE, CAN/CSA
IEC, VDE, ČSN, PN, AS, BS, GOST
IEC, EN, VDE, ČSN, PN, AS, BS
Applications
MV outdoor
substations, overhead
line installations, polemounted
units
MV outdoor
substations, overhead
line installations, polemounted
units
External power
supplies, overhead
line installations,
switch disconnector,
MV outdoor
substations
External power
supplies, overhead
line installations,
switch disconnector,
MV outdoor
substations
External power
supplies, overhead line
installations, switch
disconnector, MV outdoor substations
Outdoor railway
substations, structure
mounted outdoor
switchgear (SMOS), auto transf. feeder
stations
Features
HCEP, IP54, long
creepage distance, opt. reconnection on secondary side, opt. clamp type primary
HCEP, IP54, lightweight,
installation
vertical or horizontal,
opt. secondary
reconnection, opt. clamp type primary
Hydrophobic
cycloaliphatic epoxy resin (HCEP), IP54,
long creepage
distance, optional sec. reconnection
HCEP, IP54, lightweight,
installation
vertical or horizontal,
opt. secondary
reconnection, opt. clamp type primary
HCEP, IP54, long
creepage distance,
optional secondary
reconnection
HCEP, IP55, long
creepage distance,
compliant with railway
EN 50152-3-3 standard

Related offering


OutdoorGC
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Switch DisconnectorsGC
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Primary Protection Relays
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Sec protection relaysGC
Secondary protection relays
TPU_270
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FAQ

1. Can ABB’s medium voltage outdoor instrument transformers work in non-ABB installations?

Yes, ABB outdoor instrument transformers are easy to install and friendly to maintain in most of the medium voltage outdoor applications.

2. What is the maximum insulation voltage level of ABB’s medium voltage outdoor IEC instrument transformers?

Maximum insulation voltage levels of ABB’s medium voltage outdoor IEC instrument transformers are 40.5/95/200 kV for voltage transformers and 52/95/250 kV for current transformers.

3. Can ABB’s medium voltage outdoor IEC instrument transformers be tailored to specific customer needs?

Yes, ABB’s medium voltage outdoor IEC instrument transformers can be tailored by specific design modifications, while rating customization is done every time, as our CTs/VTs are manufactured as per customers’ rating requirements.

4. Does ABB use hydrophobic cycloaliphatic epoxy resin for medium voltage outdoor IEC instrument transformers?

Yes, ABB’s medium voltage outdoor IEC instrument transformers are available in hydrophobic cycloaliphatic epoxy resin as an insulation medium.

5. Can ABB’s medium voltage outdoor IEC instrument transformers be used in a pole-mounted primary metering unit?

Yes, ABB’s medium voltage outdoor instrument transformers can be used in pole-mounted primary metering units.

6. Does ABB have an outdoor instrument transformer for switch disconnectors?

Yes, ABB’s medium voltage outdoor instrument transformers are compatible with outdoor switch disconnectors, manufactured by ABB or by other suppliers.

7. Do ABB’s medium voltage outdoor IEC instrument transformers comply with the IEC standards?

Yes, ABB's medium voltage outdoor IEC instrument transformers comply with the latest versions of the IEC 61869 standards.

8. Can ABB’s medium voltage outdoor IEC instrument transformers be manufactured compliant with other standards, for example IEEE or CAN/CSA standard?

Yes, some of ABB's medium voltage outdoor IEC instrument transformers can be manufactured compliant with the latest IEEE C57.13 or CAN/CSA-C61869 standards.

9. Can ABB’s medium voltage outdoor IEC instrument transformers be calibrated for metering purposes?

ABB’s medium voltage outdoor IEC instrument transformers have their own routine test reports according to the relevant standard as stated on the product’s label. Based on special request, ABB’s medium voltage outdoor instrument transformers can be calibrated in an accredited laboratory.

10. What is the expected lifetime of AB’s medium voltage outdoor instrument transformers?

ABB’s medium voltage outdoor instrument transformers have an expected minimum lifetime of 30 years.

11. Can ABB’s medium voltage outdoor IEC instrument transformers be delivered worldwide?

Yes, ABB has a global installed base of medium voltage outdoor instrument transformers. Please feel free to contact our sales representatives for further information.

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