Qoltec Single-Phase 6-in-1 DIN Rail Energy Meter with 100A CT, 230V, LCD, Pulse Output

Monitor every critical electrical parameter with laboratory-grade precision using the Qoltec 50977 — a single-phase energy meter that combines voltage, current, active power, energy, frequency, and power factor measurement in one compact DIN rail module. With a 100A external current transformer included and a bright backlit LCD, this meter turns any distribution board into a real-time energy intelligence hub.

Overview

Engineered for residential and light commercial installations, the Qoltec 50977 mounts on a standard 35mm DIN rail and occupies just two modules. It measures single-phase circuits up to 230V AC and 100A via the supplied split-core CT, eliminating the need to disconnect heavy conductors. The backlit display cycles through six parameters at the touch of a button, while the S0 pulse output enables seamless integration with building management systems, PLCs, or external counters.

What stands out

• 6-in-1 measurement: voltage, current, active power, energy (kWh), frequency, and power factor
• High accuracy Class 1.0 for energy billing and sub-metering
• 100A external current transformer included for safe, non-invasive installation
• Backlit LCD with clear readouts even in dark electrical cabinets
• Pulse output (S0) for remote monitoring and data logging
• Wide operating temperature range from -20°C to +55°C
• Low self-consumption under 2W — negligible impact on measured circuit

Technical details

• Phase type: single-phase
• Rated voltage: 230V AC
• Maximum current: 100A (via external CT)
• Current measurement method: external current transformer (CT)
• CT included: yes (100A CT)
• Display type: LCD
• Display backlight: yes
• Mounting type: DIN rail (35mm)
• Measured parameters: voltage (V), current (A), active power (W), energy (kWh), frequency (Hz), power factor (PF)
• Energy accuracy class: Class 1.0
• Frequency range: 50/60 Hz
• Pulse output: yes (S0)
• Number of DIN modules: 2
• Operating temperature: -20°C to +55°C
• Meter power consumption: < 2W

Our verdict

The Qoltec 50977 is a compact, accurate, and versatile energy meter that brings professional-grade monitoring to any single-phase installation. With its included CT and pulse output, it's an excellent choice for sub-metering and energy management.