Model 007 120VAC, 50/60Hz Synchroscope, 360 Degree, Single Phase or 3-Phase, Switchboard Series, Crompton

916.86 916.86 USD 916.86


  • Brand
  • Series
  • Model
  • Form Factor
  • Input Range
  • Input Frequency
  • Input Frequency
  • Scale, Range, or Display
  • Accuracy
  • Tariff Code
  • ECCN

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The Crompton Instruments AC synchroscope measures and displays the frequency difference of two power sources. Monitoring the display allows the user to connect two synchronized AC power systems together. This can help prevent the potential damage caused by connecting two unsynchronized power sources. The 4.50" meter complies with ANSI C39.1 specifications.


  • 360° Rotary Design
  • 2.5° degrees accuracy
  • Enhanced safety
  • ANSI C39.1


  • Switchgear
  • Distribution systems
  • Energy management
  • Process control
  • Building management


  • UL listed file number E203000

TE Connectivity’s (TE) Crompton Instruments ANSI Rotary Synchroscopes measure and display the frequency difference between two power sources. Monitoring the display allows the user to connect two synchronized power systems together.
The rotary design gives real-time feedback on the synchronization state, ensuring a safe and reliable synchronization.  When the synchronization state is achieved, the indicator stays
in the synchronizing position. The ANSI Rotary Synchroscope complies with UL Approved E203000 and ANSI C39.1 standards.

Design Data Parameters

  • Nominal Voltage: 120 V AC
  • Nominal Frequency: 50Hz
    • Pull-in Frequency: 46 Hz
    • Drop-out frequency: 45 Hz
  • Nominal Frequency: 60Hz
    • Pull-in Frequency56 Hz
    • Drop-out frequency55 Hz
  • Operating Position: Panel Mounted (Vertical)
  • Accuracy2.5 degrees
  • Overshoot33% maximum
  • Response Time3 seconds (max) for 180° deflection
  • Sensitivity at Synchronization3 degrees (electrical phase) max
  • Operating Temperature-20°C to +45°C (-4°F to 13°F)
  • Storage Temperature-30°C to +70°C (-22°F to 158°F)
  • Humidity95% RH (non-condensing)
  • Insulation between Circuits1.5 kV
  • Insulation to Case3 kV
  • Overvoltage CategoryII
  • Pollution DegreeIII
  • Enclosure Integrity2
  • Enclosure Style4.5” round barrel
  • Case MaterialPolycarbonate UL94-V0
  • Electrical Connections10/32” UNF (Fixing kits supplied)
  • Mounting Studs1/4” UNF (Fixing kits supplied)
  • Dimensions in mm109.4 x 109.4 x 101 (4.3" x 4.3" x 3.98")
  • Weight500 g (1.1 pounds)
  • StandardsUL Approved E203000 and ANSI C39.1
  • Country of OriginUSA


  • 106-452-ADAA (50 or 60Hz operated)
  • 077-145A-PRAE-C5
  • 077-146A-PRAE-C6
  • 007-145A-PRAE-C5
  • 007-146A-PRAE-C6


Brand Crompton
Series Switchboard
Model 007
Form Factor 4-Stud Mount, Switchboard: 4.5-Inch ANSI C39.1
Input Range 120VAC
Input Frequency 50Hz, 60Hz
Scale, Range, or Display Slow Fast
Accuracy 2.5 Degrees
Tariff Code 9028.30.1900