Doble M4000

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Diagnostic test system for power apparatus condition assessment

Key Features and Functions

The Doble M4000 Power Factor/Tan-Delta Instrument is the leading system for evaluating the condition of high voltage power apparatus. The Doble M4000 is for field and factory acceptance, preventive-maintenance, and emergency diagnostic testing of all types of electrical power apparatus insulation to detect changes, and possible failure hazards, prevents loss of service by permitting orderly repair or reconditioning of defective insulation. It sets the standard for accuracy, reliable test results, and intelligent diagnostics for customers worldwide.

• Power Factor Testing to confirm insulation integrity and quality
• Capacitance Testing to measure physical changes that may have occurred to the apparatus
• Turns Ratio Testing to detect shorted turns or winding damage
• Leakage Reactance/Short Circuit Impedance Testing to evaluate winding deformation
• Single Phase Excitation Current Testing to evaluate the transformer magnetizing circuit
• Capacitor bank testing using the M4110, and the M4140 detects deteriorating or failed capacitors within a bank.

The M4000 system, and its cornerstone unit – the M4100 – set the standard. The M4100 was engineered from the ground up to overcome the common problems that plague other test instruments. The result is nothing less than an entirely new approach to testing.

• Totally eliminates substation signal interference with Doble's patented Line Frequency Modulation technology
• Generates its own clean test signal for the most reliable and repeatable results
• The highest power to better replicate in service condition
• Self-calibrating in the field, so it's always accurate
• Advanced digital technology takes accuracy to new levels
• Automated setup eliminates errors
• Automated setup eliminates errors
• All records are presented in a format that is easy to read, save and print.
• DTA Web provides an on-line database of test results, complete with powerful analysis tools.