CIBRE‑L3 Serie –3 Contact circuit breaker timing tester

Applications

• Commissioning of new circuit breakers: document contact timing before energisation
• Periodic inspection of HV/MV breakers (IEC 62271-100): detect deviations in open and close times
• Factory Acceptance Test (FAT): verify contact timing at factory delivery
• Field maintenance without mains power: Li-ion battery option for substations and outdoor cabinets
• Analysis of O, C, O-C, C-O, and O-C-O cycles including resistive contacts (20–5000 Ω range)
• On-site reporting: print report immediately after measurement and export via USB to PC
• Quality assurance: store results in memory (up to 200 records) for audits and documentation
• Condition monitoring: compare open times across multiple inspections to detect wear over time

Key features

• 3 dry contact inputs — simultaneously measures main contacts and resistive contacts
• Timing accuracy: ±0.05% rdg ± 0.1 ms over time windows of 1 s, 10 s, and 20 s
• Contact detection: closed ≤20 Ω / open ≥5000 Ω; resistance range 20–5000 Ω
• Trigger: internal or external; trigger input 24–300 V DC or AC_peak
• Initiate output: 20 A, 300 V DC or AC_peak; current measurement 0–20 A DC, bandwidth 5 kHz
• 4.3″ colour touchscreen — readable in direct sunlight, intuitive menu
• Integrated 2.25″ thermal printer — print report on-site immediately
• Memory: up to 200 measurement results stored internally
• Communication: USB-A (export) + USB-B (PC); optional Bluetooth (CIBRE-L3 BLUE models)
• Power supply: 100–240 V AC, 47/63 Hz — universal mains voltage
• Battery option: 14.4 V Li-ion smart 3.45 Ah (models CIBRE-L3B and CIBRE-L3B BLUE)
• Protection class: IP67 (case closed) — robust for field and outdoor use
• Operating temperature: −10 °C to +60 °C; storage −30 °C to +70 °C
• Included: complete cable set, earth cable, USB stick, printer paper, digital manual, carry bag

When to choose CIBRE-L6?

The CIBRE-L3 has 3 contact inputs and is suitable for single-phase breakers and smaller applications. For simultaneous measurement of all three phases of a three-phase circuit breaker — without re-connecting between phases — choose the CIBRE-L6 with 6 contact channels.

Related products

• CIBRE-L6 — extended variant with 6 contact channels for three-phase circuit breakers
• ARES 200D — contact resistance measurement (micro-ohm) as complement to contact timing
• SUWI-120 (rental) — available for rental — substation tester for broader substation commissioning
• TRAN-203 (rental) — available for rental — three-phase transformer analyser as supplementary system

Frequently asked questions

Which standards does the CIBRE-L3 cover?
The CIBRE-L3 is suitable for contact timing measurements in accordance with IEC 62271-100 and IEEE C37.09. For specific standards advice, we refer you to a qualified inspection authority.

Can I measure resistive contacts alongside main contacts?
Yes. The resistive contact detection range is 20–5000 Ω. The L3 measures 3 contact channels simultaneously, including resistive contacts.

Does the CIBRE-L3 operate without mains power?
Yes, with the optional Li-ion battery (14.4 V, 3.45 Ah). These are the CIBRE-L3B and CIBRE-L3B BLUE models.

Which software is used for reporting?
The CIBRE-L3 works with DMP software from HighTest. Free after registering on our training platform.

What is the calibration interval?
IONIO recommends a 12-month calibration interval. Your system is registered in our ERP and you receive an automatic reminder 6 weeks before expiry.

Difference between CIBRE-L3 and CIBRE-L6?
The L3 has 3 contact inputs for single-phase and smaller breakers. The L6 has 6 contact inputs for simultaneous measurement of all three phases of a three-phase circuit breaker.

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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 contact)
Timing windows: 1 s, 10 s, 20 s
Timing resolution:

• 1 s duration: ± 50 µs
• 10 s duration: ± 500 µs
• 20 s duration: ± 1 ms

Timing accuracy: 0.05% of reading ± 0.1 ms
Dry contact channel protection: Fuses and diode protection, all contacts grounded until test
Contact detection range:

• Closed: ≤ 20 Ω
• Open: ≥ 5000 Ω

Resistance detection range: 20 Ω – 5000 Ω
Trigger input voltage: 24 – 300 V DC or AC peak
Dry contact input protection: Diode protection / ESD protection
Breaker operations: OPEN, CLOSE, OPEN-CLOSE, CLOSE-OPEN, OPEN-CLOSE-OPEN
Breaker initiate capacity: 20 A, 300 V DC or AC peak
Initiate current measurement range: 0 – 20 A DC, 5 kHz
Power supply: 100–240 V, 47/63 Hz
Battery: Yes, 14.4 V 3.45 Ah (optional; models: CIBRE-L3B & CIBRE-L3B BLUE)
Display: 4.3-inch colour touchscreen
Memory:Up to 200 measurement records
Communication: USB 2.0/1.1 Standard-A, USB 2.0/1.1 Standard-B
Bluetooth (factory option; models: CIBRE-L3 BLUE & CIBRE-L3B BLUE)
Printer: 2.25-inch built-in printer
Dimensions: 12.5″ × 10.1″ × 6.0″ (318 × 257 × 152 mm)
Weight: 3 kg (models with battery)
Operating temperature: -10 °C to +60 °C
Humidity: 95% RH, non-condensing
Protection class: IP67 (case closed)

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Included accessories

• 6 m contact cable
• 10 m contact extension cable
• 1 m initiate cable
• 5 m initiate extension cable
• 1 m external trigger cable
• 5 m external trigger extension cable
• Power cable
• Grounding cable
• USB cable, printer paper (2×)
• USB flash drive, user manual (digital version)
• Carry bag

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