EHV Circuit Breaker Analyzer DigiAMR

EHV Circuit Breaker Analyzer DigiAMR

The Amperis DigiAMR is an inexpensive, easy to use digital circuit breaker analyzer. The DigiAMR can be operated stand-alone or can be computer controlled. It can fully analyze a circuit-breaker’s performance by testing the contact time, stroke, velocity, over-travel, and contact wipe. Contact and motion analysis can be performed for all breaker contact operations (Open, Close, Open – Close, Close – Open, and Open – Close – Open). Timing results are recorded and displayed on the 256 x 128 pixels back-lit LCD screen and can also be printed on the built-in 4.5” wide thermal printer.


  • “On-line” Timing Mode
  • Diagnostic Capabilities
  • Internal Test Record and Test Plan Storage
  • Open/Close Coil Current Monitoring
  • Contact Timing Inputs
  • Breaker Stroke and Velocity
  • CT Input
  • Voltage Monitoring Input
  • Circuit Breaker Initiate Feature
  • Computer Interface
  • User Interface
  • Built-in Thermal Printer

DigiAMR’s Specifications


Portable Digital Circuit Breaker Analyzer

Physical specifications

18K"W x 14"H x 7"D (47.0 cm x 35.7cm x 17.6 cm). 20 lbs (9.1 kg)

Input power

100-240Vac, 3A, 50/60Hz

Dry-contact inputs

3 dry-contact channels; each channel detects main contact and insertion resistor contact

Timing windows

1 second, 10 seconds, or 20 seconds

Timing resolutions

±50 micro-seconds @ 1 sec. duration, ±500 micro-seconds @ 10 sec. duration, ±1.0 milli-seconds @ 20 sec. duration

Timing accuracy

0.05% of reading ±0.1 milli-seconds @ 1 second duration

Dry-contact detection range

Closed: Less than 20 Ohm. Opened: greater than 5000 ohm

Resistor detection range

50 - 5,000 ohms

Trigger input voltage

Open/close: 30 - 300 V, DC or peak AC

Voltage sensing input range

V1: analog input; 0 - 255 V DC or peak AC; sensitivity ±1 V
V2: voltage presence/absence detector input; 30 - 300 V DC or peak AC

Breaker operations

Initiate Open, Close, Open-Close, Close-Open, Open-Close-Open

Breaker initiate capacity

30A, 250 Vac/dc max

Initiate current reading range

One, non-contact, Hall-effect sensor, 0 - 20 amp range, dc to 5 Khz AC

Digital travel transducer inputs

1 digital travel transducer channel; linear range: 0.0 - 60.0 in (±0.005 in). Rotary range: 0 - 360 degrees (±0.006 degrees)

Contact travel point difference

Measures “slow-close” contact-point distances; results can be printed

CT current sensor

One, non-contact, 0-100A


Back-lit LCD screen (128 x 240 pixels); viewable in bright sunlight and low light


Built-in 4½” wide thermal printer that can print both graphic contact travel waveforms and tabulated test results

Internal test record storage

Store up to 200 test records and 100 test plans

Computer interfaces

One USB port, optional Bluetooth wireless interface

Pc software

Windows® based Breaker Analysis software included with purchase price


Furnished with full set of test leads (including 20-foot contact leads and 30-foot contact lead extensions)


Transportation case (available for the DigiAMR and travel transducers)


Designed to meet UL/IEC 61010 and CAN/CSA C22.2 No. 1010.1-92 standards


Operating: -10°C to +50°C (+15°F to +122°F); Storage: -30°C to +70°C (-22°F to +158°F)


90% RH @ 40°C (104°F) non-condensing


2,000 m (6,562 ft) to full safety specifications


One year on parts and labor

NOTE: the above specifications are valid at nominal voltage and ambient temperature of +25°C (+77°F). Specifications are subject to change without notice

Controls of EHV Circuit Breaker Analyzer DigiAMRConnections of EHV Circuit Breaker Analyzer DigiAMRThermal printout of graphic test resultsThermal printout of tabulated test results

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