Doble M4000 Power Factor/Tan-Delta Instrument

• 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.

Diagnostic Capabilities:

• 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.
• 45-70Hz output selectable
• Maximum Test Current: 300mA at 10kV
• Maximum Test Voltage: 12kV
• Measures Power Factor for all impedances (capacitive, resistive, and inductive)