Sei is the exclusive representative in Latin America for Hyundai Heavy Industries Bulgaria for the On-Load Tap Changers. Hyundai entered the OLTC market by acquiring Elprom, a company manufacturing OLTCs since 1952 in Bulgaria. Hyundai’s OLTC are designed up to 300kV and can be supplied with vacuum, SF6 or oil technology. The OLTCs are engineered to meet the highest operational seismic and short circuit requirements. Type tests are performed by recognized labs such as KEMA and CESI.
Hyundai’s OLTC are designed up to 300kV and can be supplied with vacuum, SF6 or oil technology. The OLTCs are engineered to meet the highest operational seismic and short circuit requirements. Type tests are performed by recognized labs such as KEMA and CESI.
RS 21 SERIES-
Rated currents (A):
- 310 – single phase design
-
Rated voltage (kV):
- 72,5
-
Step voltage (V):
- 1200
-
Connection diagrams:
- reverse change-over selector
-
Number of steps:
- up to 23
-
Selector switch insulation level:
- L
-
Carrying flange shape:
- Ellipti
-
Rated currents (A):
- 200, 400, 630 and 1250 - three phase design for delta connected windings
-
Rated voltage (kV)
- 41,5 and 72,5 - full insulation between phases of delta connected windings
-
Step voltage (V)
- up to 3000
-
Connection diagrams:
- with and without coarse and reverse change-over selector
-
Number of steps:
- up to 27
-
Selector switch insulation level:
- K and L
-
Carrying flange shape:
- round or elliptic
-
Rated currents (A):
- up to 1250 - three phase design for regulation at neutral point
-
Rated voltage (kV):
- 41.5; 72.5; 123; 170; 245 and 300
-
Step voltage (V):
- up to 2500
-
Connection diagrams:
- with and without coarse and reverse change-over selector
-
Number of steps:
- up to 27
-
Selector switch insulation level:
- K, L and M
-
Carrying flange shape:
- round or elliptic
-
Rated currents (A):
- 200, 400, 630 and 800 - single phase design
-
Rated voltage (kV):
- 41,5; 72,5; 123;170 and 245 - single phase design
-
Regulation schemes:
- with multiple change-over selectors
-
Number of steps:
- up to 125
-
Selector switch insulation level:
- L, M, N for single phase execution
-
Carrying flange shape:
- round
-
Rated currents (A):
- 200, 400, 630 - three phase design for regulation at neutral point
- 200, 400, 630, 800, 1200 and 1600 - single phase design for all connection diagrams
-
Rated voltage (kV):
- 41,5; 72,5; 123; 170; 245 and 300
-
Step voltage (V):
- up to 4000
-
Connection diagrams:
- with and without coarse and reverse change-over selector
-
Number of steps:
- up to 35
-
Selector switch insulation level:
- K, L, M, N and P
-
Carrying flange shape:
- round or elliptic
-
Rated currents (A):
- 200, 400, 600
-
Rated voltage (kV):
- 41,5; 72,5 and 145
-
Step voltage (V):
- up to 2000
-
Electrical endurance
- 800 000 s.o.
-
Switching operations till inspection:
- 300 000 s.o.
-
Number of steps:
- over selector 12/23
-
Carrying flange shape:
- over selector 12/23