HighTest CIBRE-L3 3-Contact Circuit Breaker Timer | O／C／O-C／C-O／O-C-O operating times, 0.05% ±0.1 ms, built-in printer, IP67 (lid closed)

HighTest CIBRE-L3 3-Contact Circuit Breaker Timer

Overview

The CIBRE-L3 is a 3-contact circuit breaker timer from HighTest (UK). It measures the operating times of a breaker's main and resistor contacts and compares them with the manufacturer's specifications to determine whether the breaker operates correctly. It can drive the breaker open and closed through its trip outputs, or be triggered externally. Results can be printed directly, saved to a USB flash drive or stored in internal memory. The battery-powered CIBRE-L3B, the BLUE version with Bluetooth, and the CIBRE-30／60 circuit breaker analyzers with travel and speed analysis are available on inquiry.

Key Specifications

• Measurements: Contact operating time: O, C, O-C, C-O, O-C-O (ms and cycles)
• Dry contact inputs: 3 channels (each detecting a main contact); closed ≤ 20 Ω, open ≥ 5000 Ω; resistor detection 20–5000 Ω
• Timing accuracy and resolution: 0.05% rdg ±0.1 ms; ±50 µs with 1 s window, ±500 µs with 10 s, ±1 ms with 20 s
• Trip output: 20 A, 300 V DC or AC peak; current reading 0–20 A DC
• External trigger: 24–300 V DC or AC peak
• Display and printing: 4.3-inch color touchscreen; built-in 2.25-inch printer; 200 records; USB
• Power: 100–240 V, 47／63 Hz; optional battery 14.4 V 3.45 Ah (CIBRE-L3B)
• Dimensions and weight: 318 × 257 × 152 mm; 3 kg (battery model)
• Environment and protection: Operating temperature -10–60 ℃; IP67 (lid closed)

Applications

• Operating time measurement for commissioning tests and periodic maintenance of high-voltage circuit breakers.

Specifications per the HighTest CIBRE-L3 Series product page (hightest.co.uk, retrieved 2026-10-23).