Digital multimeters with CT current transformers | current measurement solutions
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Digital multimeters with current transformers (CT) are a professional group of measuring equipment designed for monitoring and analyzing electric current, voltage, power, energy, and other electrical parameters. These solutions are used when higher currents need to be measured safely and accurately without interrupting the electrical circuit. Thanks to external current transformers (clamp-on or conductor-mounted), such multimeters are indispensable in industrial, commercial, and even residential applications.
Purpose and main functions
Digital multimeters with current transformers allow measurement ranges to be extended while maintaining a high level of safety and accuracy. They are used both for instantaneous measurements and for long-term energy monitoring and analysis.
Main functions may include:
Measurement of electric current via current transformers (CT)
Measurement of AC and (in some models) DC voltage
Calculation of active, reactive, and apparent power
Electrical energy (kWh) metering
Monitoring of frequency and power factor (cos φ)
Data display on a digital screen
In some models – data transmission (e.g., via RS485, Modbus, Wi-Fi)Application
For household users: Suitable for analyzing household electricity consumption. Helps identify which devices consume the most energy. Useful for solving overload or unstable power issues. Safe measurement without disconnecting wires.
For electricians: A fast and reliable way to check currents in distribution boards. Working with higher currents without direct contact. Suitable for installation diagnostics, load balancing, and commissioning tasks. Convenient for both indoor and outdoor use.
For engineers / technical specialists: Analysis and optimization of electrical network loads. Identification of energy losses. Monitoring of industrial equipment, motors, and transformers. Integration into energy monitoring and BMS systems.
Advantages
Safe measurement of high currents without interrupting the circuit
High measurement accuracy
Wide range of applications – from household to industrial level
Ability to work with current transformers of different ratings
Suitable for both instantaneous and long-term measurementsDisadvantages
Requires proper selection of a suitable current transformer
More complex connection compared to a basic multimeter
Some advanced models may require configuration or programmingDigital multimeters with current transformers are an indispensable product group for anyone working professionally with electrical energy or aiming to manage it intelligently. They ensure safe, accurate, and versatile measurements, enabling not only fault diagnostics but also optimization of energy consumption. This is a solution that pays off both in daily maintenance and in long-term operation of electrical systems.
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Panel | Digital Multimeter | with 3 Current Transformers (CT) | Current | Voltage | Frequency Meter | 3F | 1-63A | 1-500VACCode: ES-SEM-60DPrice 52.50 € VAT incl.( 43.38 € VAT excl. )
Panel | Digital Multimeter | with 3 Current Transformers (CT) | Current | Voltage | Frequency Meter | 3F | 10-100A | 1-500VACCode: ES-SEM-100DPrice 66.00 € VAT incl.( 54.54 € VAT excl. )
Panel | Digital Multimeter | with 3 Current Transformers (CT) | Current | Voltage | Frequency Meter | 3F | 10-250A | 1-500VACCode: ES-SEM-250DPrice 67.31 € VAT incl.( 55.63 € VAT excl. )
