M5400 Sweep Frequency Response Analyzer Use the Doble M5400 Sweep Frequency Response Analysis test set to investigate mechanical integrity of transformers, reactors and other equipment consisting of windings. If you measure the

Insulation Analysis Accessories Maximize capabilities of M-Series analyzers Doble offers a series of accessories to complement your M-Series asset analyzers. Choose from a variety of options that allow you to customize your

M4100 High Voltage Apparatus Tester The M4100 is the industry standard for power apparatus and insulation testing. Its unique combination of test capabilities and artificial intelligence analysis software makes it the power

M7100 Analyzer High-Voltage Asset Analyzer The Doble M7100 High-Voltage Asset Analyzer is your complete solution for high-voltage testing. With an intuitive design and dual high-voltage leads, the M7100 greatly reduces the number

EZCT-2000C Current Transformer Test Set The EZCT-2000C is Vanguard’s third-generation microprocessor-based current transformer test set. Designed specifically for CT testing, the EZCT-2000C has the following outstanding features that can greatly increase productivity

UPS S3 Portable AC/DC Power Supply The Vanguard UPS S3 is an AC/DC adjustable output power supply designed to operate substation circuit breakers. The UPS S3’s AC and DC voltage sources can

TRF-250 Automatic, 3-Phase Transformer Ratio Finder 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

DTA Software Doble Test Assistant Software Doble Test Assistant software is your comprehensive software tool for the collection, analysis and management of test results for the Doble M-Series family of instruments. DTA

DUCe for Apparatus Testing Secure Testing in a Cyber-Insecure World Applying data integrity and data security best practices to your business processes, Doble apparatus testing field solutions standardize your testing and data

TDR9100 Circuit Breaker Test System The Doble TDR9100 Circuit Breaker Analyzer is a state-of-the-art circuit breaker test set for testing all types of circuit breakers with efficient and accurate performance measurements. The

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.