Overview

The Electrocorder CT-2VA is a single-phase voltage, current, power and energy logger for load studies and energy monitoring where a clamp-on current transformer is the right sensor.

Use it when you need to record voltage and current together on a single-phase circuit, then review power and energy behaviour over time. The CT-2VA is suited to distribution boards, meter boards and circuits where a clamp-on current transformer can be fitted around the conductor.

Best for:

• Single-phase power and energy monitoring on accessible circuits.
• Checking whether low voltage is related to high current demand.
• Energy audits and load surveys on smaller single-phase circuits.
• Facilities and maintenance investigations where voltage and current need to be compared.
• Temporary monitoring where a clamp-on CT is preferred to a flexible Rogowski coil.

Consider another model if:

• You need a flexible current sensor for larger conductors, where the EC-2VA may be a better fit.
• You need plug-in appliance monitoring, where the AL-2VA may be easier to use.
• You need three-phase power and power factor, where the EC-7VAR-RS is more appropriate.

What you get:

• CT-2VA logger.
• Clamp-on current transformer, voltage lead with plug, USB lead, carry case, battery, user instructions and free Electrosoft analysis software.
• A single-phase power and energy logger for circuits where a CT can be clipped around the conductor.

Set up the logger in Electrosoft, connect the voltage lead and fit the CT around the conductor being monitored, then start recording. When enough data has been captured, connect the logger to a PC by USB and use Electrosoft to view, save, export and report on the results.

Applications

Typical applications: The CT-2VA is intended for single-phase power and energy studies where a clamp-on CT is practical.

What the CT-2VA records:

• Single-phase voltage and current.
• Power and energy values derived from the voltage and current measurements.
• Minimum, maximum and average values over the selected averaging period.
• Data for comparing voltage behaviour with current demand.

Why constant sampling matters: many instruments only take periodic snapshots. The Electrocorder continuously samples throughout the averaging period, helping capture short events, changing loads and trend data that can otherwise be missed.

Recording duration depends on the selected averaging period. Longer periods support energy-use monitoring, while shorter periods can support more detailed investigations.

The logger is typically installed by a competent person at a distribution board, meter board or suitable circuit. If isolated test points or a mains socket are available, it can often be fitted without interrupting the supply.

Case Studies

These related Electrocorder case studies, application pages and articles show how this type of logging is used in practical investigations.

Energy Auditing
A knowledge page explaining how recorded electrical data supports energy audits, load profiling and evidence-based recommendations.

Performing an Energy Audit
An article covering practical energy-audit steps and the value of recorded electrical usage data.

Recording Electrical Energy Use is Easy
An article explaining how Electrocorder loggers and Electrosoft help capture, review and report recorded electrical data.

Resources

Documentation:
Download the CT-2VA datasheet and user instructions for detailed technical information, installation guidance and operating instructions.

	Datasheet
	User Instructions (English)

Free Electrosoft PC software
Electrosoft is compatible with Windows 11 down to Windows 7. It lets you view and zoom current, power and energy graphs, export data to Microsoft Excel, email results to colleagues, and print or save reports as PDF files with your company logo.

Electrosoft includes statistics, load balancing, tariff and costing analysis, annual CO2 and energy usage projections, logger management and calibration management tools. Sample files are included so you can try the software without having a logger connected.

Download Electrosoft PC software

Features

When to choose the CT-2VA
Choose this model when you need single-phase voltage, current, power and energy data and a clamp-on CT is physically suitable.

Compare with related Electrocorder models
If a flexible coil is easier to fit, consider the EC-2VA. If the load plugs into a standard socket, consider the AL-2VA. For three-phase systems, consider the EC-7VAR-RS.

Key features:

• Records single-phase voltage and current together.
• Clamp-on CT current sensing.
• Useful for energy monitoring, voltage/current correlation and load studies.
• Configurable averaging period for short or longer-term monitoring.
• Constant sampling to reduce the risk of missing short-duration or changing load events.

Measurement note
Because the CT-2VA measures voltage and current together, it can support power and energy analysis. It should be installed by a competent person where access to conductors or distribution equipment is required.

Included with your single-phase power and energy logger with clamp-on current transformer:

• CT-2VA logger.
• Clamp-on current transformer, voltage lead with plug, USB lead, carry case, battery, user instructions and free Electrosoft analysis software.
• A single-phase power and energy logger for circuits where a CT can be clipped around the conductor.

Shipping and origin details:

• Harmonised Code: 9030.3901.00 (electronic datalogger).
• Origin: Northern Ireland, United Kingdom.
• Packaged dimensions: approximately 1.5 kg, 25 x 18 x 17 cm.

Determining product order codes:

To specify your Electrocorder select various codes and enter into the boxes in order to create an accurate product code. For example: CT-2VA-5H-UK-IP65-SET.

FAQ

What is the CT-2VA used for?
It is used for single-phase voltage, current, power and energy monitoring.

How is it different from EC-2VA?
The CT-2VA uses a clamp-on current transformer. The EC-2VA uses a flexible Rogowski coil.

Can it help explain low-voltage problems?
Yes. Because it records voltage and current together, it can help show whether low voltage coincides with high current demand.

Can it be installed without interrupting supply?
In many cases, yes, if suitable test points and safe conductor access are available. It should be installed by a competent person.

What software is used to analyse the data?
Electrosoft PC software is used to configure the logger, download recorded data, view graphs, export data and create reports.