Reliable current and voltage measurement is becoming increasingly important for safe power generation, transmission and distribution – making ultra-reliable medium-voltage transformers essential.
Designed for gas-insulated, air-insulated and open air-insulated medium-voltage switchgear, Zelisko’s medium-voltage transformers are successfully deployed around the world, operating in all kinds of weather conditions. Benefiting from high-grade epoxy-resin insulation, the transformers are designed to provide maintenance-free operation throughout their product life cycle (up to 30 years).
Block Type Indoor
Current Transformer
SGS - Series
Indoor Current Transformers 12 – 36 kV
The current transformers series SGS are maintenance-free castresin
transformers for indoor application. They comply with
various national and international standards (IEC 61869-2,
VDE 0414, DIN 42600, ANSI, GOST etc.).
Max. Rated Primary current : 2500 A
Rated Secondary Current : 1 A; 5 A
Insulation level 12 – 36 kV
Standard : IEC 61869-2,VDE 0414, DIN 42600, ANSI, GOST
Block Type Indoor
Current Transformer
CT - Series
Indoor Current Transformers 12 – 24 kV
The current transformers series CT are maintenance-free castresin
transformers for indoor application. They comply with
various national and international standards (IEC 61869-2,
VDE 0414, DIN 42600, ANSI, GOST etc.).
Max. Rated Primary current : 4000 A (Also primary change over 1:2)
Rated Secondary Current : 1 A; 5 A
Standard : IEC 61869-2,VDE 0414, DIN 42600, ANSI, GOST
Block Type Indoor
Current Transformer
AEG DESIGN - Series
Indoor Current Transformers 12 – 24 kV
The current transformers series IS are maintenance-free castresin
transformers for indoor application. They comply with
various national and international standards (IEC 61869-2,
VDE 0414, DIN 42600, ANSI, GOST etc.).
Max. Rated Primary current : 1250 A (Also primary change over 1:2)
Rated Secondary Current : 1 A; 5 A
Standard : IEC 61869-2,VDE 0414, DIN 42600, ANSI, GOST
Block Type Indoor
Voltage Transformer
EGS / EGG / EK - Series
Indoor Voltage Transformers Upto 36 kV
The Voltage Transformers series EGS / EGG / EK (single-pole
insulated) are maintenance-free cast-resin transformers for
indoor application for system voltage Um up to 36 kV. They
comply with various national and international standards
(IEC 61869-3, VDE 0414, DIN 42600, ANSI, GOST etc.).
Max. Rated Primary Voltage : 12 /√3 kV, 24 /√3 kV, 36 /√3 kV
Rated Secondary Voltage : 100/√3 V or 110/√3 V
Standard : IEC 61869-3, VDE 0414, DIN 42600, ANSI, GOST
Metal-Clad
Voltage Transformers
ESA, ESB, EYS, EYB, VGM - Series
Voltage Transformers 12 – 40.5 KV
Zelisko’s metal-clad voltage transformers are maintenancefree
single-pole insulated cast-resin transformers for indoor
application in a touch-proof metal enclosure. They are mostly
used for gas-insulated switchgear and comply with various
national and international standards (IEC 61869-3, VDE 0414,
ANSI, GOST etc.).
Furthermore, it is possible to equip the voltage transformer
with a fuse on the primary side.
Max. Rated Primary Voltage : 2/√3 … 38.5/√3 kV
Rated Secondary Voltage : 100/√3; 110/√3; 120/√3; 190/√3
100/3; 110/3; 120/3; 190/3 V
Standard : IEC 61869-3, VDE 0414, ANSI, GOST
Block Type Indoor
Voltage Transformer
ZGS / ZGG / ZK - Series (UNEARTHED)
Indoor Voltage Transformers Upto 36 kV
The Voltage Transformers series ZGS / ZGG / ZK (double-pole
insulated) are maintenance-free cast-resin transformers for
indoor application for system voltage Um up to 36 kV. They
comply with various national and international standards
(IEC 61869-3, VDE 0414, DIN 42600, ANSI, GOST etc.).
Max. Rated Primary Voltage : 12 /√3 kV, 24 /√3 kV, 36 /√3 kV
Rated Secondary Voltage : 100/√3 V or 110/√3 V
Standard : IEC 61869-3, VDE 0414, DIN 42600, ANSI, GOST
Outdoor
Voltage Transformer
EGF, ZGF, KVDS - Series
Voltage Transformers 12 – 36 KV
The voltage transformers series EGF (single-pole insulated) and
ZGF (double-pole insulated) are maintenance-free cast-resin
transformers for outdoor application and system voltage Um up
to 36 kV. They comply with various national and international
standards (IEC 61869-3, VDE 0414, ANSI, GOST etc.). The Voltage
Transformers are designed for ambient temperatures from
-40°C up to +50°C and for operation up to 1000m above sea
level (>1000m on request)
Available in Single-Pole Insulated or Double-Pole Insulated
Max. Rated Primary Voltage : 12 /√3 kV, 24 /√3 kV, 36 /√3 kV
Rated Secondary Voltage : 100/√3; 110/√3; 120/√3; 190/√3
100/3; 110/3; 120/3; 190/3 V;
100; 110 ; 120V
Standard : IEC 61869-3, VDE 0414, ANSI, GOST
