Inductive Combined Transformer EJGF high-voltage

Inductive Combined Transformer EJGF high-voltage

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Inductive Combined Transformer EJGF high-voltage,

Type EJGF combined transformers are used in high-voltage substations,
within the 245-550 kV range.
They transfer high voltage and high current into standardised,
equivalent values for meters, measuring and protection devices.

Features

  • Reduced transport costs with one unit instead of two
  • Less space needed with just one footprint
  • Lower material costs due to a reduced number of supports and fewer primary connections
  • Lower installation effort as only one unit has to be installed instead of two

Technical data

Type EJGF

245

300

330

362

420

550
Standard IEC / IEEE
Highest voltage for equipment kV 245 300 300 363 420 550
Rated power-frequency withstand voltage kV 460 460 460 575 630 680
Rated lightning impulse withstand voltage kV 1050 1050 1175 1175 1425 1550
Frequency Hz 50 / 60
Primary rated current A ≤ 5000
Secondary rated current A 1 / 5
Rated short-time thermal current [Ith] kA / 3s ≤ 80
Rated dynamic current [Idyn] kA ≤ 200
Accuracy class CT part 0.1-3; P; PR; PX; TPS; TPX; TPY; TPZ
Accuracy class VT part 0.1-3; 3P; 6P
Rated thermal limiting output VT part VA ≤ 3000
Max. simultaneous burden (cl. 0.2) VA 300
Max. number of CT cores 8
Max. number of VT windings 5
Nominal operating / transport overpressure (20°C) 4 / 0.5

Type EJGF

245

300

330

362

420

550
Height of unit* A mm 4980 4980 6140 6140 6500 7440
Height to primary terminal* B mm 3375 3375 4730 4730 5090 5890
Depth of unit including terminal box C mm 845 845 1088 1088 1088 1088
Depth of unit base D mm 749 749 1088 1088 1088 1088
Width of unit base E mm 736 736 1075 1075 1075 1075
Distance between screw holes at base F mm 600 600 900 900 900 900
Min. creepage distance*   mm 6700 7500 8250 9050 10500 13750
Gross weight approx.*   kg 940 940 1000 1000 1600 1700
Gas weight, approx. * kg 45 45 58 58 60 63

 

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