Variable Frequency AC Resonant Test System

Variable Frequency AC Resonant Test System

Description

Variable Frequency AC Resonant Test System , High Voltage Test Set For UHV Substation Or GIS

Detailed Product Description

I. Application :

This series of test system mainly aims at AC voltage withstand test of primary equipment of large capacitor and high voltage and can also satisfy field AC voltage withstand test of sorts of capacitance apparatus. HV test reactors use combined series-parallel patterns which not only meet the requirements of voltage withstand of HV transformer, GIS, SF6 breakers,mutual inductions and bushings but also that of long distance XLPE cables ,with compatibility of extensive tests to be a desired voltage withstand test device for power supply system overhauling and electric power engineer construction units.

The above picture is for variable series resonance test system of 5000KVA/1000KV on test field in Shanxi Jindongnan Substation, testing HV
GIS of 1000KV class UHV line in domestic.

Applicable objects
－ Long distance XLPE cables with 110KV,220KV,500KV class
－ HV GIS or GIL, HV coupling capacitor,capacitor voltage transformer of no more than 1000KV class
－ Assembling capacitor(test frequency pledges in 45—65Hz)

II. Main Components:(4000KVA/1000KV test system for example)

Note:1.Load capacitantor can be optional when small load line is tesing or need analog load to control test frequency .

2.Test reactor can be produced to be 150KV,200KV,250KV,300KV, 350KV, 400KV for each piece rated voltage according to different tested object scope or customer requried. The max. rated current of each HV reactor can be 1~15A optional in this serialized set,

3. HV Damping inductance can be optional for suppressing high frequency harmonics and resisting overvoltage caused from tested object flashover, special in EHV or UHV test set.

III. General Technical Data:

Mode of system test: Series resonant with variable frequency
System model : HTXB-4000KVA/200KV,400KV,600KV, 800KV,1000KV
Input power supply : 380±10%(three-phase),50Hz/60Hz
Number of HV test reactor: 4pieces
Rated output capacity: 4000kVA
Rated output Voltage: 200KV,400KV,600KV,800KV,1000KV
Max Test voltage : no more than 200KV,400KV,600KV,800KV,1000KV
Rated output current: 4A /single piece or in series；16A or 20A in parallal
Reg. Freq range : 20Hz-300Hz
Output Resonance voltage waveform: sine wave
THD of output waveform: ≤1%
Insulation level: Under 1.1 times and keeping 1min, normal
Duty cycle : 60mints optional on under rated current working condition ;
Quality factor of test set itself: Q≥60
Temperature rise: Less than 65K under rated current working withn duty cycle;
Noise level: No more than 70B
Reactor Structure: oil immersed type, epoxy tube cylinder type；

IV. Technical Feature and advantage

Modular design, being able for series-parallel connection of reactors,wide range of application.
Operating frequency range:20-300Hz
High quality factor value:Q ≥ 100(when f=20Hz) large thermal capacity, low temperature rise, long
continuous of performance period
Convenient for field test for the size and weight smaller than conventional test transformers.
The output voltage waveform is sine wave, the waveform deviation factor ≤ 1％
This device can be furnished with special test vehicle and container together
PD free design optional.

V. Other Typical Model

1. For 123KV ~300KV class GIS on-site AC hipot test