CIBRE-L3, 3-Contact Circuit Breaker Timer

CIBRE-L3, 3-Contact Circuit Breaker Analyser is designed using advanced engineering technology to test contact timings of circuit-breakers. CIBRE-L3 has fast, easy and accurate measurement features by its user-friendly software. CIBRE-L3 is a battery-powered device (optional feature), which allows users to perform tests even without power supply during field tests.

Why do we need to test circuit breakers?

It is very important to test circuit breakers regularly. Contact Timing Tests and Motion tests are performed to determine the optimal performance of the breakers. The testing can determine improper breaker operations in case of system fault and to improve system reliability.

Contact Timing Tests

Contact timing tests are performed to compare the breakers’ main & resistor contact performance against the manufactures specifications.

The breakers OPEN, CLOSE, OPEN-CLOSE, CLOSE-OPEN & OPEN-CLOSE-OPEN operations are timed in milliseconds (ms) and cycles and then compared with the manufacturers’ specification to determine the performance of the circuit breaker.

CIBRE-L3 features with a 4.3-inch large colour touch display, which is visible under both bright sunlight as well as dim light conditions. With the HighTest Data Management Platform (DMP Software), users can analyse and manage measurement results on PCs. Operators can easily print the measurement results with the 2.25-inch built-in printer of CIBRE-L3. The results can also save to a USB flash drive or to the device’s internal memory.

Multi-language capability and user-friendly operation menu make it easy to control CIBRE-L3.

CIBRE-L3 is a light-weight, compact and rugged device with the protection of IP67 (case closed) which makes it perfect for the field test.

Download Datasheet



  • Contact Timing (O, C, O-C, C-O and O-C-O)
  • 3 Dry Contact Inputs
  • Timing Accuracy: 0.05% rdg ± 0.1 ms
  • Timing Windows: 1s, 10s & 20s
  • Contact Detection Range: Closed ≤20 Ω &
  • Open ≥5000 Ω
  • Optional Battery
  • Optional Bluetooth Communication
  • PC Software
  • 2.25” Built-in Printer
  • 4.3” TFT Touch Colour Display
  • Light-weight and Portable
  • Protection Class IP67 (case closed)

Technical Specifications

Measurement Parameters Contact Timing (O, C, O-C, C-O & O-C-O)
Dry Contact Inputs 3 dry input channels (each detects main) and insertion resistor contacts
Timing Windows 1s, 10s, 20s
Timing Resolution 1 s duration 10 s duration 20 s duration
± 50 µs ± 500 µs ± 1 ms
Timing Accuracy 0.05% rdg ± 0.1 ms
Dry contact channel protection Fuses and Diodes protection, All contacts grounded until the test
Contact detection range Closed ≤20 Ω
Open ≥5000 Ω
Resistor detection range 20Ω – 5000Ω
Trigger input voltage 24 – 300 V DC or ACpeak
Dry contact input protection Diode Protection/ ESD
Breaker Initiate Capacity 20 A, 300 V DC or ACpeak
Digital Travel Transducer Input 5V/12Vdc TTL
Initiate-current reading range 0 – 15A DC, 5 kHz
Input Power 100-240 V,  47/63 Hz
Battery Yes, 14.4 Vdc 3.6 Ah (Optional; Model: CIBRE-L3B, CIBRE-L3B BLUE)
Display 4.3-inch Colour Touch Display
Memory Up to 200 records
Communication USB 2.0/1.1 Standard-A, USB 2.0/1.1 Standard-BBluetooth (Factory install option; Model: CIBRE-L3B BLUE)
Printer 2.25-inch Built-in Printer
PC Software DMP Software (Windows 10)
Dimensions 12.5″ x 10.1″ x 6.0” (318 mm x 257 mm x 152 mm)
Weight 3 kg (models with battery)
Working Temperature -10 °C to + 60 °C
Humidity 90% RH non-condensing
Protection Class IP67 (case closed)
CIBRE-L3, 3-Contact Circuit Breaker Timer