Special Equipment Testing

Circuit Breakers Testing

Specialized Testing Services:

1. Timing, Travel, and Motion Analysis:

   • Measures opening and closing times, contact travel, and motion characteristics.

   • Identifies mechanical delays, friction issues, or linkage misalignments.

   • Essential for preventive maintenance and compliance with operational standards.

2. Dynamic Contact Resistance Measurement (DCRM):

   • Monitors contact condition during breaker operation.

   • Detects contact wear, erosion, or pitting in real-time.

   • Critical for SF₆ and vacuum breakers where contact health directly impacts performance.

3. Static Contact Resistance (Micro-Ohm Testing):

   • Measures resistance across closed contacts.

   • Verifies proper conductivity and identifies loose or corroded connections.

4. Coil Current Analysis:

   • Evaluates the performance of operating coils during open/close operations.

   • Detects coil anomalies, insulation issues, or mechanical problems.

5. Motor Current and Motor Supply Testing:

   • Ensures proper performance of spring-charged or motor-operated breakers.

   • Detects malfunctions in motor drive units or auxiliary circuits.

6. Under-Voltage and Minimum Trip Voltage Tests:

   • Verifies breaker operation at reduced or nominal voltages.

   • Confirms correct functioning of protective and control circuits.

7. SF₆ Gas Quality and Density Checks:

   • Assesses gas integrity and dielectric strength in SF₆ breakers.

   • Detects leaks, contamination, or reduced insulation capability.

8. Insulation Resistance and Dielectric Tests:

   • Measures insulation integrity of breaker poles, bushings, and auxiliary circuits.

   • Ensures safe operation under rated voltages and environmental conditions.

Benefits of Specialized Testing:

• Ensures safe, reliable, and efficient breaker operation

• Detects early mechanical and electrical issues to prevent downtime

• Supports preventive maintenance, commissioning, and condition-based monitoring

• Provides actionable insights for maintenance planning and asset management

Circuit breakers are critical components in electrical networks, protecting equipment and personnel by interrupting fault currents and ensuring system stability. To guarantee reliable operation and extend service life, specialized testing services are essential. These tests evaluate the mechanical, electrical, and operational performance of breakers under normal and fault conditions, helping to detect wear, degradation, or potential failures before they occur.