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Description:

Induced voltage withstand test is one of the most important dielectric test of power transformers.
The IVW750 test set provides four times of the power frequency power to test transformer insulation performance
between turns of coils, layer to layer.
Model IVW750 series test set suit for the test of up to 132kV/100MVA Transformer.

Standard confirmed to
IEC 60076-3 Power transformers Part 3: Insulation levels, dielectric tests and external clearances in air.

Components
3-phase asynchronous motor, rated frequency, 50Hz, one piece
3-phase synchronous generator, rated frequency, 200Hz, one piece
Motor control cabinet, Excitation cabinet, Generator control cabinet
The motor and generator are positioned on the same one pedestal, and connected with steel couples.

Working Principle:
The soft starter drives the motor to rotate without heavy
start current. The motor drives the synchronous generator
up to rated rotate speed, the exciting current issued by DC
exciter is inputted to the generator rotor coil. Since
generator’s rotor is running, therefore, the generator will
output AC current. Output voltage changes with different
exciting current.

Equipment Features:
☆Soft starter for motor drive, small start current
without impact to the power gird
☆DC carbon-brush excitation
☆Output: 200Hz Constant frequency, variable
voltage(800V)
☆Digital Display:
Output Current, Output Voltage, Output Frequency
Input Current, Input Voltage, Exciting current, Exciting
Voltage
☆Indication: Power, zero, Open/Close.etc
☆Buttons: Power Start, voltage up, voltage down, etc.
☆Test duration can be preset by time controller.
☆Connection Type: Motor-delta, Generator-star
☆Start up mode for motor: AC Soft Starter
☆Direction of the motor: Counter clockwise rotation
facing the shaft of the motor
☆Protection against over load, over heat, over voltage,
over current, Zero Protection
☆Reserved interface for motor start/stop, voltage
adjustment

Specifications:
Motor Soft Starter: 380V, 400kW
Motor: 380V, 50Hz, 355kW

RM:1490 r/min
Output Voltage: 800Vac 750kVA
Output Frequency: 200Hz
Rated output current: 541A
Rated exciting current ＜75 A, Rated exciting voltage
＜200Vdc,subject to load.
Capacity: 750kVA
Suitable for induced over voltage withstand test of
transformer
PF: 0.47(lag)
Insulation Level: F
Output Phase: Single-phase/Three-phase
Wave Aberration Rate at No load state: ≤3%
L-L Voltage unbalance rate(The cold&hot state): ≤2%
Operation Mode: continuous
Over voltage: 120% rated voltage, 30 minutes
Temp: -15 to 40°C
RH: ＜90%
Altitude: ＜2000meters
Size & Weight:
M-G Set: 3590(L)×1100mm(W)×1350mm(H), 5880kg