Biddle 670065‑47 Dielectric Loss / Tan‑Delta Test Instrument

Module Feature

670065‑47 is Biddle Instruments portable field‑use capacitance & dissipation‑factor (DF / tan‑delta) test set, max test voltage 12 kV. It adopts bridge‑balance measuring principle, built‑in anti‑interference suppression circuit, can work under strong electromagnetic interference in substation site environment. It measures capacitance value, dissipation‑factor, dielectric loss watts, judge insulation aging, moisture, partial contamination for power equipment such as transformer, high‑voltage bushing, generator, cable accessories. This model has been discontinued, mostly used / refurbished spare instrument in power‑utility maintenance work.

Working principle

High‑voltage excitation is applied to DUT. Internal reference bridge compares current phase and amplitude between measured sample and standard reference component. Manual adjust capacitance dial for null‑balance; digital display outputs capacitance, dissipation‑factor (DF) and power‑loss value. Supports normal / reverse‑polarity test to eliminate external interference error, built‑in interference‑suppression circuit improves field anti‑noise performancebee.mif.pg....

Onboard components

12kV high‑voltage power source unit, precision AC measuring bridge circuit, null‑detector, digital LED readout panel, polarity‑select switch, interference‑suppression control knob, high‑voltage safety interlock circuit, heavy‑duty portable metal case, high‑voltage test terminal.

LED indicators

Digital LED display shows capacitance, dissipation‑factor percentage and loss‑power value; high‑voltage live warning indicator lamp, power‑on status lamp.

Hardware self‑diagnosis

No automatic built‑in self‑diagnosis program. Perform short‑circuit / open‑circuit check and standard‑reference calibration before field test; judge instrument health via known‑standard sample comparison measurement.

Programming software

No dedicated PC software; all measurement operation completed via front‑panel knob and display. Manual record test‑data; data can be exported by external camera / screenshot.

Electrical & Process Parameters

Model:670065‑47 Brand:Biddle Instruments Device type:Capacitance & Dissipation‑Factor (Tan‑Delta) Test Set Max test voltage:12 kV rms DF measuring range:0‑20 % / 0‑200 %, resolution down to 0.01%assets.teq... Function:On‑site dielectric loss, capacitance measurement for transformer, bushing, generator high‑voltage insulation

Mechanical & Structure

Mounting:Portable field‑carry instrument Protection class:Portable test‑instrument safety standard Housing:Shock‑resistant metal portable enclosure

Environmental

Operating temperature:0℃ ~ +45℃ Storage temperature:-20℃ ~ +65℃ Ambient humidity:5~95% non‑condensing Certification:Compliant with power‑industry high‑voltage test‑equipment requirement Status:Discontinued legacy field‑test instrument, available as used / calibrated second‑hand unit

Installation

Place instrument on flat ground, reliable protective‑earth connection. Connect high‑voltage test lead and sample ground wire. Select test‑voltage, perform normal‑polarity and reverse‑polarity balance‑measurement, average two‑group reading to eliminate external interference, record capacitance and dissipation‑factor data. Strictly follow high‑voltage‑test safety operation specification.

Interface

High‑voltage output terminal, sample measuring terminal, protective‑earth terminal, mains‑power inlet socket.

Diagnostic

Cannot achieve bridge null‑balance:Severe site electromagnetic interference; enable interference‑suppression function or use normal‑reverse‑polarity averaging method. Unstable reading:Bad ground connection, loose high‑voltage test‑clip. Zero‑drift reading:Instrument needs periodic calibration.

Product Brief

Biddle Instruments 670065‑47 12 kV portable capacitance & dissipation‑factor (tan‑delta) test‑set, legacy power‑field high‑voltage bridge instrument, used for insulation‑dielectric‑loss detection of transformers, bushings and rotating‑machines in power‑substation maintenance work.