High Voltage Lab

Helping manufacturers and utilities address requirements for testing to ensure conformance with design specifications and national and international standards.

Areas of Focus

Transformer Rectifier Testing — TRU Design Tests

As the largest test lab on the west coast of North America, the lab is capable of conducting distribution- to transmission-level high-voltage tests on all types of equipment, including transformers, insulators, switchgear, bushings, cables and accessories, instrument transformers, transmission line hardware, surge arrestors, SF₆ insulated equipment, generators, insulated aerial lift devices, and transformer rectifier units (TRUs).

The lab’s independent, third-party status and experienced and knowledgeable technical staff enhance the credibility of manufacturers’ test reports.

The lab offers a full range of qualification and certification tests to IEEE, IEC, CSA, ANSI and other international standards, as well as custom testing solutions. Condition assessment tests may be performed in the field or in the lab to evaluate the equipment condition. The lab also has a long history of conducting forensic analysis investigations and collaborative research with the electrical industry.

TESTING SERVICES

Type / qualification testing
- Dry and wet AC voltage withstand and flashover
- Dry and wet DC voltage withstand test
- Lightning impulse
- Switching impulse
- Steep front impulse test
- Radio Influence voltage (RIV)
- Partial discharge and visual corona
- Tracking and erosion wheel and fog chamber
- Salt fog test
- Capacitance and tan delta (dielectric losses)
- Induced testing
- Temperature rise test
- DC and AC insulation resistance measurements
Field testing
- Dielectric
Forensic analysis
Research

MATERIALS WE TEST

Transformers
- Instrument transformers
- Insulators (porcelain, glass, polymer)
- Combined electrical and mechanical
- Bushings
- Capacitors
- AC and DC Switchgear
- Surge Arrestors
- Cables and accessories
- SF6 insulated equipment
- Transmission Line hardware
- Insulated aerial devices
- Transformer rectifier units (TRUs)

CAPABILITIES

Main test equipment

AC test equipment—1200 kV and 400kV resonant test set, 800kV RTS for field test
High-voltage VFRTS (Variable Frequency Resonance Test Set)—90 kV, 34 A-portable
Impulse voltage test equipment
- 3.2 MV, 320 kJ impulse generator
- 500kV impulse voltage test
3 Phase Generator
- 60 Hz, 5 MVA
- 420Hz, 75kVA 3 phase
DC voltage test equipment—1000 kV, 10 mA
Insulation tracking wheels (dip and spray wheels) and fog chambers—1,000 hours
Partial discharge test equipment
12.5kV 3 phase, 2.5MW for rated voltage test
Incline plane tracking and erosion test fixture

High voltage testing capabilities

High voltage AC – 1600 kV
High voltage DC – 1000 kV
Impulse testing – 3200 kV
3 phase AC feeder – 12 kV
3 phase generator – 60 Hz, 5 MVA; 300 Hz, 1 MVA

HIGH VOLTAGE TECHNICAL PAPERS

Kevin J. Rapp, C. Patrick McShane, John Vandermaar, Dejan Vukovic, Stefan Tenbohlen, “Long Gap Breakdown of Natural Ester Fluid”, 2010 International Conference on High Voltage Engineering and Application (ICHVE 2010), October 2010.

T. De Rybel, A. Singh, J.A. Vandermaar, M. Wang, J.R. Marti, and K.D. Srivastava,“Apparatus for Online Power Transformer Winding Monitoring Using Bushing Tap Injection”, IEEE Transactions on Power Delivery, Volume 24, Number 3, July 2009.

K. Abdolall, A. J. Vandermaar, “Feasibility of Free Radical Detection in Transformer Oils”, IEEE ISEI, June 2008.

A.J. Vandermaar,“Condition Assessment of Power Transformers Portable”, PES GM, 2008.

K. Abdolall, A.J. Vandermaar,“Remote Monitoring of the Internal Temperature of Porcelain and polymer Clad High Voltage Equipment”, International Symposium on Electrical Insulation Materials (ISEIM), Japan, 2008.

F. Rahmatian, J. Gurney and A.J. Vandermaar,“Portable 500 kV Optical Voltage Transducer for On-Site Calibration of HV Voltage Transformers without De-Energization”, CIGRE, A3-103, 2006.

M. Wang, A.J. Vandermaar and K.D. Srivastava, “Improved Detection of Power Transformer Winding Movement by Extending the FRA High Frequency Range”, IEEE Transactions on Power Delivery, Volume 20, Number 3, July 2005.

K. Abdolall, A.J. Vandermaar, “Effects of Moisture in Oil/Paper Insulation On Power Factor Measurements”, IEEE, 2005

M. Wang, A.J. Vandermaar and K.D. Srivastava,“Transformer Winding Movement Monitoring in Service – Key Factors Affecting FRA Measurements”, IEEE Electrical Insulation Magazine, Volume 20, Number 5, pp. 5-12, September/October 2004.

M. Wang, Q. Jiang, J. Vandermaar, J.R. Marti and K.D. Srivastava, “Condition Monitoring of Power Transformers in Service”, International Conference on Power Systems, Nepal, 3-5 November 2004.

M. Wang, A.J. Vandermaar and K.D. Srivastava, “Review of Condition Assessment of Power Transformers in Service”, IEEE Electrical Insulation Magazine, Volume 18, Number 6, November/December 2002.

Denis, R.J., An, S.K., Vandermaar, J., and Wang, M., “Comparison of Two FRA Methods to Detect Transformer Winding Movement”, EPRI Substation Equipment Diagnostics Conference VIII, New Orleans, USA, 20-23 February 2000.

Wang, M., Vandermaar, A.J., and Srivastava, K.D., “Condition Monitoring of Transformers in Service by the Low Voltage Impulse Test Method”, 11th International Symposium on High Voltage Engineering, paper 1.45.S3, London, England, 22-27 August 1999.

Wang, M., Vandermaar, A.J, and Srivastava, K.D., “Transformer Condition Monitoring by the Low Voltage Impulse Test Method”, CIGRE Third South African Regional Conference, Session 1, Item No. 3, Johannesburg South Africa, 19-21 May 1998.

N. A. F. Jaeger, S. E. Cherukupalli, A. J. Vandermaar, C. P. Jaeger, H. Kato, F.Rahmatian, and G. S. Polovick “On-Line Real-Time Relative Dissipation Factor Measurement System.” Canadian Conference on Electrical and Computer Engineering ’98, Waterloo, ON, May 24-28, 1998.

A.J. Vandermaar and M. Wang, “Transformer Condition Monitoring by Frequency Response Analysis”, Substation Equipment Diagnostics Conference VI, TR-111314, September 1998.

S. E. Cherukupalli, A. J. Vandermaar, N. A. F. Jaeger, F. Rahmatian, H. Kato, C. P. Jaeger, D. R. Green, and G. S. Polovick, “Development of a Condition Monitoring System for High-Voltage Current Transformers,” Proceedings of the International Power Engineering Conference, Singapore, May 21-23, 1997.

Vandermaar, A.J., and Wang, M.,“Transformer Condition Monitoring By Frequency Response Analysis” 10th International Symposium High Voltage Engineering, Vol. 4, pp. 119-122, Montreal, Canada, 25-29 August 1997.

Vandermaar, A.J., “On Site Testing of SF6 Systems Problems and Experiences”, Cage Club Meeting, Varennes, Quebec, 7-8 May 1981.

Brochures

Team

**SARA TAHERMARAM**
Division Manager
High Voltage and Mechanical Testing Services
**604.590.6661** **Email→**

High Voltage Team→