Transformer & Substation Testing System (TRAX) · Transformer & Substation Testing System...

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Transformer & Substation Testing System

(TRAX)

NETA Power Test 2016

Fort Worth, TX

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TRAX

Transformer & Substation Test System

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Job Order Perform following tests on a D-Y 500 kV/138 kV 400 MVA

• Turns Ratio

• Winding Resistance

• Power Factor

• Leakage Reactance

• DRM for LTC diagnostics

Perform following test on a SF6 500 HV Circuit Breaker

• Contact Resistance

• Breaker Motion and Timing

TRAX – Instrument view (”My TRAX”)

TRAX – TTR @ 250/2000 V

TRAX – Excitation Current

TRAX – Power Factor Amplifier

TRAX – Power Factor @ 12 kV

TRAX – Winding Resistance @ 16/100 A

TRAX – Adaptive Demagnetization

Measure/calculate voltage-time integral (V*s) at high current (above

saturation current)

Create demagnetization cycles by reducing Vs value (typically 20%

reduction/step)

Effective • Verified against true AC demagnetization. Similar results in excitation current

and magnetic balance verification measurements

Fast • Significantly faster than static demagnetization algorithms for smaller

transformers (40 cycles demagnetization in less than 1 minute for 0.5 MVA

transformer)

Adaptive demagnetization

Magnetic balance after AC demag b-n Magnetic balance after adaptive demag b-n

a-n b-n c-n a-n b-n c-n

100% 68% 31% 100% 68% 31%

50% 100% 50% 50% 100% 50%

32% 67% 100% 31% 68% 100%

DRM on LTC - Patent pending Measure current , HV voltage, LV voltage (LV open)

R1 and R2 transition resistor values per tap (value/10). All within spec (± 10%)

Current

”ripple”

HV

voltage LV voltage

TRAX – Short-Circuit Impedance (Leakage Reactance)

Circuit Breaker Testing

TRAX – Contact Resistance @ 100 A

TRAX – Relay/timing

TRAX Solution – Apps!

10.4” touch screen

Dial

TRAX Top Panel

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AUX

LINK

Ethernet

MAIN FUSES

MAINS

INPUT

AUX GROUND

AC OUTPUT

200A

800A

DC OUTPUT

100A

DC

OUTPUT

16A

DC OUTPUT

300V

AC

OUTPUT

2200V

AC

OUTPUT

250V

GROUN

D

AUX

POWER

TRAX Side Panel

DC INPUTS

VOLTAGE INPUTS CURRENT INPUTS

FUSE 1-4 500

mA

LED indicators

TRAX – Top Panel - Analog Inputs

TRAX Solution – Apps!

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TRAX – Test Report w/ Nameplate Info

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Manual Operation

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TRAX Objective - Simplification

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Booth 225

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