TRF-250
Automatic, 3-Phase Transformer Ratio Finder

Highly-accurate turns ratio readings, ease of operation, and reliability

The TRF-250 is Vanguard's fourth generation transformer turns ratio tester. This latest design provides a higher turns-ratio test voltage of 250Vac, provides a wireless Bluetooth PC interface, and features a 44-key “QWERTY”-style membrane keyboard. All these features greatly improve the accuracy of the turns ratio readings, ease of operation, and reliability.

The TRF-250 determines the turns ratio of the transformer under test using the IEEE C57.12.90 measurement method. The turns-ratio range is from 0.8 to 50,000 to 1. Transformer turns ratio,  excitation current, and winding polarity are displayed on the built-in 128 x 64 pixels graphic LCD screen. The TRF-250 can be used as a standalone unit or can be computer-controlled.

EZCT-2000C
Ensemble de test de transformateur de courant

Augmente la productivité et fait gagner du temps lors de la mise en service

L'EZCT-2000C est le testeur de transformateur de courant de troisième génération de Vanguard basé sur un microprocesseur. Conçu spécifiquement pour les tests de TC, l'EZCT-2000C présente les caractéristiques exceptionnelles suivantes qui peuvent considérablement augmenter la productivité et faire gagner du temps lors de la phase de mise en service :

  • Effectue des tests d'excitation, de rapport de courant, de polarité et d'angle de phase des TC
  • Mesure la résistance d'isolation et la résistance des enroulements secondaires du TC
  • Mesure la charge de l'impédance du TC
  • Autonome ou contrôlé par ordinateur via une interface USB ou Bluetooth sans fil

Les câbles de test de l'EZCT-2000C peuvent être connectés à tous les terminaux de sortie du TC, et le test complet du TC peut être effectué automatiquement sans aucune intervention de l'opérateur.

TRM-403
40 A three-phase winding resistance meter with demagnetization

The TRM-403 is a three phase transformer winding resistance meter that allow the user to connect all test cables to the transformer bushings. The unit will then measure the transformer resistance value for each of the phases without the need to disconnect and reconnect cables for each phase. The TRM-403 can provide a fast and stable reading of very large transformers by utilizing a 60Vdc power supply. It is capable of outputting a selectable test current from 1A to 40A. Since the TRM-403 can accurately measure resistance from 1 micro-ohm to 500 Ohms, it can be used as a micro-ohm meter to measure EHV circuit breaker contact resistance, or for any low resistance measuring application.

CT-8000 S3
Digital Circuit Breaker Analyzer

Fully analyze a circuit breaker's performance

The CT-8000 S3 is Vanguard's fourth generation EHV circuit breaker analyzer. The CT-8000 S3 is available with 3 (part number 9103-UC) or 6 contact timing channels (part number 9104-UC). The CT-8000 S3 can fully analyze a circuit breaker's performance by measuring the main contact and resistor contact time, stroke, velocity, over-travel, bounce back and contact wipes. Also, an outstanding feature of the CT-8000 S3 is the ability to perform dynamic resistance tests on circuit breaker contacts.

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