OIL
REACTORS
The use of a core depends on the reactor application.
INSULATING OIL
Filled with PCB-free oil that has been dried and degassed, and complies with IEC standards.
WINDINGS
Made with circular cross-section, with pure cellulose paper conductor insulation.
TANK
Corrugated or with radiators made from stamped cold-rolled steel.
APPLICAZIONI
Oil Reactors
CURRENT LIMITING / SHORT CIRCUIT REACTORS
Current limiting reactors are used to limit line currents. They are normally used to ensure that fault currents do not exceed the maximum values of the circuit breakers. They are connected in series with the line. They are single-phase coreless coils connected in a three-phase configuration, which can be installed one above the other in a frame, or supplied individually and connected in a three-phase configuration on-site.
NEUTRAL FORMING REACTORS
Typically in oil, they have a three-phase core with zig-zag winding. This type of reactor is used to create a dummy neutral, which can be connected to earth either directly or through a resistor. The neutral formers are shunt-connected to the line.
FILTER REACTORS
These are single-phase or three-phase reactors used to reduce the harmonic content in the mains or inside plants with high voltage distortion. They are connected in series or in parallel with the capacitance (capacitors) on both the LV side and MV side.
SHUNT
Shunt reactors are shunt-connected to long transmission lines to compensate for their capacitance and prevent voltage rises at the end of the line.
SMOOTHING REACTORS
Smoothing reactors are connected in series with DC lines that have a current ripple that must be reduced. Smoothing reactors are typically single phase.
DETUNING REACTORS
These reactors are connected in series with capacitors to shift the resonant frequency to a value that is not dangerous to the capacitors.
TECHNICAL SPECIFICATIONS
Power
up to 20 MVAr
Voltage class
up to 145 kV (BIL 650)
Core
CRGO (if provided)
Windings
aluminium or copper
Cooling
ONAN, ONAF, OFWF, ODWF or ODAF
Oil type
mineral, Midel 7131, vegetable, silicone
Switching
no-load, on-load (OLTC)
Ambient temperature
-60°C to +60°C
Accessories
Overpressure valve, thermometer, oil level, vibration damping, protective casing and more.
Strong points
Outdoor installation even in aggressive environmental conditions; no insulation level limits, limited magnetic field emissions.
