Predictive Maintenance of Power TransformersDiagnostic and condition based maintenance tests on Power Transformers in Substations, Power Plants and large Industrial Plants.

www.tecnalia.com

TECHNOLOGICAL SERVICES

AIMED AT

• Utilities

• Power plants

• Manufacturers of electrical equipment

• Industrial plants

• Promoters of wind farms

• O&M companies

TESTS

• Tan Delta and capacitance of windings

• Tan Delta and capacitance of bushings

• FRA - Frequency Response Analysis

• Return voltage

• Insulation resistance and polarisation index

• Windings resistance

• Magnetic core characterization

• Voltage ratio

• Short-circuit impedance

SERVICES

Tests to assess transformer condition: insulation, windings, core and bushings, as part of predictive maintenance and asset management programmes.

• Expertise on the performance and interpretation of the tests• Long Experience in on-site tests

www.tecnalia.com

Contact Info:

Luis Martínez luis.martinez@tecnalia.com

TECNALIAParque Científico y Tecnológico de BizkaiaC/ Geldo, Edificio 700E-48160 Derio - Bizkaia (Spain) T 902 760 000*T +34 946 430 850 (International calls)www.tecnalia.com

FULLY UPDATED TESTING EQUIPMENT FROM THE MAIN MANUFACTURERS

• DOBLE

• TETTEX

• UNITRONICS

• BAUR

• Other

Wide scope of on-site tests at substations, power and industrial plants on:

• Transformers

• HV & MV Cables

• Generators

• MV Motors

Resistencia de fase a 75 ºC

135

140

145

150

1 3 5 7 9 11 13 15 17 19 21

Posición CTC

Res

iste

ncia

(moh

ms)

0

1

2

3

4

5

disp

ersi

ón (%

)

U W U V W V Dispers.%

Ensayo FRA sobre el arrollamiento de Baja Tensión

-80

-70

-60

-50

-40

-30

-20

-10

2 E+01 2 E+02 2 E+03 2 E+04 2 E+05 2 E+06

Frecuencia (Hz)

Am

plitu

d (d

B)

uwvuwv

TECNALIA is a private applied research and testing centre with the necessary human resources to generate technological knowledge. A combination of technology, tenacity, efficiency, courage and imagination. TECNALIA has over 1.500 expert staff working together towards a common goal: generating business opportunities through applied research.

FRA test on low voltage winding Phase resistance at 75 ° C

Am

plitu

de (d

B)

Frequency (Hz)

Resi

stan

ce (m

ohm

s)

Dis

pers

ion

(%)

ANALYSIS: RECOVERY VOLTAGE

Position CTC