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CB SCOPE Loco VCB Test System

The CB SCOPE is a portable, intelligent analyzer for testing the dynamic performance of Locomotive Vacuum Circuit Breakers (VCBs) of all types.
It measures timing, contact bounce, simultaneity, travel characteristics, coil currents, and provides complete performance diagnostics. The system’s Windows™-based Test Manager software allows users to control tests, analyze data graphically, and generate professional reports — enabling condition-based maintenance with minimal downtime.

Key Features

  • Tests all types of Loco VCBs for critical performance parameters.

  • Measures timings, contact bounce, simultaneity of contacts.

  • Analyses travel characteristics – speed, contact gap, over-travel and rebound.

  • Records trip/close coil currents and holding coil curves.

  • Generates graphical and numerical reports with calculation footers.

  • Windows-based CB SCOPE Test Manager for setup control and data analysis.

  • Pre-programmed test plans and pass/fail limits for rapid testing.

  • Trend analysis for predictive maintenance through multi-test comparison.

  • PDF and Excel export, graphical cursor review, and bitmap graph saving.

  • Supplied in a rugged aluminium case for transport and field use.

Technical Specifications

Parameter Specification
Breaker Control Two solid-state contacts rated 35 A, 300 V AC/DC (Close & Trip)
Sampling Speeds 20 kC, 10 kC, 5 kC, 2 kC, 1 kC (selectable)
Plot Lengths 2 s @ 20 kC → 40 s @ 1 kC
Travel Channels Linear / Rotary transducers, 0–5 V DC excitation
Contact Timing Channels 3 (2 for double-bottle VCB + 1 spare)
Measurement Range 1 ms – 40 s @ 1 kC / 0.05 ms – 2 s @ 20 kC
Accuracy ±0.05 % ± 1 resolution
Coil Current Range 1 – 25 A DC (±0.5 %)
Voltage (Travel) 0–5 V DC (1.2 mV res., ±0.5 %)
Communication Ethernet link to laptop
Power Supply 230 V AC ±15 %, 50 Hz ±10 %, ≈ 70 VA
Dimensions 365 × 290 × 260 mm instrument rack

Standard Accessories

  • Contact cables (R–R’, Y–Y’, B–B’) – 7 m × 3 nos.

  • Current cables (CH1, CH2) – 5 m × 2 nos.

  • Travel cables (T1, T2) – 7 m × 2 nos.

  • Breaker control cables (CLOSE, TRIP) – 5 m × 2 nos.

  • AC mains cord (3 m), master earth cable (7 m), Ethernet cable (1.5 m) – 1 each

  • Spare fuses (10 pcs)

  • Aluminium carrying case for instrument

  • Carrying case for test lead set

  • CB SCOPE Test Manager software on CD

  • Instruction manual + test & calibration report

Optional Accessories

  • Standard laptop (pre-configured with software)

  • Travel transducers (as required for different VCB designs)

  • External printer for graphical report output

Applications

  • Railway maintenance depots for periodic VCB testing.

  • Condition assessment of loco breaker mechanisms (speed, wipe, bounce).

  • Predictive maintenance based on trend analysis of timing signatures.

  • Field service and OEM quality inspection testing.

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