RESONANT TESTING SYSTEMS UIG 2018-03-14T13:23:58+00:00

Project Description

RESONANT TESTING SYSTEMS UIG

Applications

Resonance testers UIG are designed for testing high voltage objects such as generator stator windings, busbars, cables insulation, etc. with an AC voltage of an industrial frequency or with a rectified current voltage in semi-automatic and automatic modes.

UIG testers are developed based on the principle of parallel resonance in an electrical circuit in which an object under the test acts as an electrical capacitance (the stator winding of the generator, track, etc.), and where an automatic inductance changing is used for supporting the current
resonance.

For all voltage ranges, the resonance is maintained automatically. Inductance change is done using a resonance reactor, which can have two structural variations.

The first option has a decreased initial value of inductance due to mechanical changes to the magnetic gap reactor. In the second option is based on changing the inductance of the bias magnetic DC reactor.

Using the current resonance effect enables a significant reduction of a power consumption (usually 40 times and more). Thus, it reduces voltage regulator power, a step-up transformer rated power as well allows for a smaller cross-section of cables.

The resonance testers UIG support performing full set of high-voltage tests for the high-power generators.UIG testers are bespoke devices produced according to the individually client’s requirements.

Apparatus Comparison Table

Apparatus Output
power, kVA
Test object
capacitance,
uF
Voltage, kV Place where installed
 AC (with
resonance)
DC (without
resonance)
DC
 UI-25/50/70-180  180  0.01 – 0.8  25  50  70  Ust-Khantaiskaya HPP, Russia
 UI-15/225  225  0.01 – 6
(6 @ 7.5 kV)
 15  –  –  CJSC Beltelekabel, Belarus
 UIG-35/50/70-315  315  0.01 – 0.8  35  50  70  Dniester PSP, Ukraine
 UIG-35/400  400  0.01 – 1  35  –  –  Boguchanskaya HPP, Ukraine
 UIG-50-500  500  0.01 – 0.7  35  50  70  Rogunskaya HPP, Tajikistan
 UIG-30/60/85-700  700  0.01 – 2.5  30  60  85  Voljskaya HPP, Russia
 UIG-35/70/100-750  750  0.01 – 1.5  35  70  100  Sayano-Shushenskaya HPP, Russia
 UIG-35/70/100-800  800  0.01 – 1.8  35  70  100  Krasnoyarskaya HPP, Russia
 UIG-35/70/100-1400  1400  0.01 – 1.5  35  70  100  Sayano-Shushenskaya HPP, Russia

Generalized specifications

Parameter Value
Output AC voltage in stator winding test mode, kV, max 30 – 501
Output AC voltage in bus test mode, kV, max 60 – 100
Output DC voltage in leakage current test mode, kV 85 – 140
Output AC/DC current, A, max 6 – 45
Measurement uncertainty (specified from 10 % of range to
100 % of range), %
3
Output power, kVA, max 200 – 1500
Test object capacitance, µF, max 0.5 – 4
Duty cycle at full load (test / idle), minutes 20 / 40
Output test voltage rising speed (adjustible), kV/s 1
Input AC current, A 80 – 120
Input voltage, V 400 ± 10 %2
Frequency, Hz 50 ± 1
Power consumption, kVA 30 – 50
Typical dimensions (W × H × D), mm 1800 × 2200 × 1900
Weight, kg 1200 – 3500
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