Project Description

CIBRE-L3 Brochure

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.


  • 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 ParametersContact Timing (O, C, O-C, C-O & O-C-O)
Dry Contact Inputs3 dry input channels (each detects main) and insertion resistor contacts
Timing Windows1s, 10s, 20s
Timing Resolution1 s duration10 s duration20 s duration
± 50 µs± 500 µs± 1 ms
Timing Accuracy0.05% rdg ± 0.1 ms
Dry contact channel protectionFuses and Diodes protection, All contacts grounded until the test
Contact detection rangeClosed≤20 Ω
Open≥5000 Ω
Resistor detection range20Ω – 5000Ω
Trigger input voltage24 – 300 V DC or ACpeak
Dry contact input protectionDiode Protection/ ESD
Breaker Initiate Capacity20 A, 300 V DC or ACpeak
Digital Travel Transducer Input5V/12Vdc TTL
Initiate-current reading range0 – 15A DC, 5 kHz
Input Power100-240 V,  47/63 Hz
BatteryYes, 14.4 Vdc 3.6 Ah (Optional; Model: CIBRE-L3B, CIBRE-L3B BLUE)
Display4.3-inch Colour Touch Display
MemoryUp to 200 records
CommunicationUSB 2.0/1.1 Standard-A, USB 2.0/1.1 Standard-B

Bluetooth (Factory install option; Model: CIBRE-L3B BLUE)

Printer2.25-inch Built-in Printer
PC SoftwareDMP Software (Windows 10)
Dimensions12.5″ x 10.1″ x 6.0” (318 mm x 257 mm x 152 mm)
Weight3 kg (models with battery)
Working Temperature-10 °C to + 60 °C
Humidity90% RH non-condensing
Protection ClassIP67 (case closed)