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CBA.307A Circuit Breaker Analyzer

The CBA.307A Circuit Breaker Analyzer is a versatile system for testing, analyzing, and assessing the performance of power system circuit breakers, load switches, isolators, arcing contacts, and related HV switching equipment. Covering all test items required for HV circuit breakers, the CBA.307A combines advanced functionality with a compact, field-ready design. Compared to traditional testers, it delivers superior accuracy, automation, and reporting capabilities.

Key Features

  • Measures closing/opening time, pole-to-pole time spread, unit-to-unit spread, and contact bounce.

  • Calculates closing, opening, and average speed of moving parts.

  • Tests clearance, over-travel, overshoot, and total travel distance.

  • Analyzes coil current (closing/opening curves and peak current).

  • Captures travel time, speed-time, and acceleration-time curves.

  • Dynamic resistance measurement with high precision.

  • Supports complex breaker sequences: CO-t1-CO, O-t-CO-t1-CO, and CO rated operating verification.

  • Automatic comparison of mechanical travel curves with saved references.

  • Measures CO (Close-Open) and OC (Open-Close) times.

  • Graphite contact closing/opening and dynamic resistance curve analysis.

  • On-board curve zoom, editing, statistics, and analysis tools.

  • 2.1-inch touch screen interface with USB keyboard/mouse support.

  • Built-in micro printer for instant reporting.

  • Automatic WORD-format test report generation with export via flash disk.

Technical Specifications

Time Measurement

  • Channels: 12 (3 support both time contact & resistance contact)

  • Additional: 6 isolated channels for cascaded unit measurement

  • Range: 0–4000 ms

  • Accuracy: < 0.1 ms

  • Resolution: 0.01 ms

Travel Measurement

  • Linear Resistance Sensor: 0–250 mm (±0.5 mm), 0–25 mm (±0.05 mm)

  • Angular Resistance Sensor: 0–360° (±0.5°)

  • Resolution: 0.01 mm / 0.01°

Resistance Measurement

  • Pre-Insertion: 50–5000 Ω, error < 1% RDG + 2D

  • Dynamic Resistance: 25–100 A test current, error < 1% RDG + 2D

  • Contact Resistance:

    • 0–10 mΩ, error < 0.5% RDG + 0.05% FS

    • 0–2 mΩ, error < 0.5% RDG + 2D

Speed & Acceleration

  • Linear Scale (250 mm / 25 mm): 0–20 m/s, error < 0.5% RDG + 2D

  • Angle Sensor: 0–20 m/s, error < 0.5% RDG + 2D

  • Acceleration Sensor: 0–20 m/s², error < 5% RDG + 2D

Coil Current

  • Range: 0–20 A

  • Resolution: 0.001 A

  • Accuracy: < 0.01 A

Vibration Measurement

  • Range: 0–5000 G

  • Accuracy: < 3%

Power Supply

  • Internal DC Source: 24–265 V, 0–20 A

  • AC Input: 220 V ±10%, 50 Hz ±10%

Data & Software

  • Memory: 8 GB built-in

  • Interfaces: 2x USB (data export + peripherals)

  • OS: Windows 7, 8 & 10 (32-bit minimum)

  • Report: WORD format auto-generation

Environmental

  • Temperature: –10°C to +50°C

  • Humidity: < 80% RH

  • Dimensions: 448 × 260 × 150 mm

  • Weight: 15 kg

Applications

  • Routine and acceptance testing of HV circuit breakers

  • On-site mechanical and electrical performance diagnostics

  • Maintenance verification of isolators and load switches

  • Analysis of arcing contact behavior and vibration performance

  • Research and factory testing of circuit breaker designs

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