Overview

The Electrocorder EC-3V is a portable three-phase voltage recorder for supply voltage monitoring, voltage optimisation checks, fault finding and long-term voltage investigations.

Use it when you need to understand how a single-phase or three-phase voltage supply behaves over time. The EC-3V can record one, two or three phases using four voltage leads for L1, L2, L3 and neutral, helping identify voltage variation, high or low voltage events, and supply trends.

Best for:

• Three-phase voltage monitoring and supply-voltage investigations.
• Voltage optimisation checks before and after changes.
• Investigating machines tripping, resetting or behaving unpredictably.
• Long-term monitoring where voltage variation needs evidence.
• Sites where current and power factor are not required.

Consider another model if:

• You need voltage and current together, where the EC-7VAR-RS may be a better fit.
• You need a smaller compact three-phase voltage recorder, where the SL-3V may be sufficient.
• You only need single-phase plug-in voltage monitoring, where an EC-1V or EC-2V may be simpler.

What you get:

• EC-3V logger in the smaller 190 x 120 x 60 mm enclosure.
• Four voltage leads for L1, L2, L3 and neutral.
• USB download lead, carry case, batteries, user instructions and free Electrosoft analysis software.

Set up the logger in Electrosoft, install it at the measurement point, 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 EC-3V is intended for voltage-only investigations where the question is whether the supply voltage is too high, too low, unstable, unbalanced or changing over time.

What the EC-3V records:

• One, two or three phase voltages.
• TRMS average, minimum and maximum values across the selected averaging period.
• Voltage trends, dips, rises and supply variation over time.
• Date and time information for recorded voltage events.

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. Long-term voltage monitoring can be used to collect evidence over days or weeks, while shorter averaging periods support more detailed investigations.

The EC-3V is built into a rugged 190 x 120 x 60 mm enclosure and supplied with fused voltage leads, USB lead, carry case and batteries. It should be installed by a competent person, generally an electrician or engineer.

Related application guides:

• Voltage Problem Loggers: for high voltage, low voltage, voltage variation, dips and interruptions.
• Machine Trip and Reset Loggers: for equipment trips, resets, lockouts and intermittent electrical faults.

Case Studies

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

Machines Tripping or Resetting
A power-quality investigation page covering voltage waveform purity, voltage variation and site-related electrical issues.

Voltage Optimisation
A knowledge page explaining how recorded voltage data can support voltage optimisation decisions and checks.

HEP ODS, Croatia - Voltage Logging
A distribution-network example showing how Electrocorder voltage logging equipment is used to diagnose supply voltage issues.

Machines or Equipment Resetting
A blog article about investigating machine resets and site electrical conditions using recorded evidence.

Resources

Documentation:
Download the EC-3V datasheet and user instructions for detailed technical information, installation guidance and operating instructions.

	Datasheet
	User Instructions (English)
	User Instructions (Português)

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 EC-3V
Choose this model when you need a dedicated three-phase voltage recorder and do not need current, power or power-factor data.

Compare with related Electrocorder models
If you need a smaller three-phase voltage recorder, consider the SL-3V. If you need voltage, current, power and power factor together, consider the EC-7VAR-RS. For simple single-phase plug-in monitoring, consider the EC-1V or EC-2V.

Key features:

• Records one, two or three phases using four voltage leads.
• Designed for voltage quality, supply variation and voltage optimisation studies.
• Configurable averaging period for short investigations or longer-term monitoring.
• Constant sampling to reduce the risk of missing short-duration voltage events.
• Tamper-resistant setup after configuration in Electrosoft.
• Suitable for supply-voltage checks, high/low voltage investigations and machine reset/tripping enquiries.

Measurement note
The EC-3V is a voltage recorder. It does not measure current, power or power factor. Use a power logger such as the EC-7VAR-RS when those relationships matter.

Included with your portable three-phase voltage recorder:

• EC-3V logger in the smaller 190 x 120 x 60 mm enclosure.
• Four voltage leads for L1, L2, L3 and neutral.
• USB download lead, carry case, batteries, user instructions and free Electrosoft analysis software.

Shipping and origin details:

• Harmonised Code: 9030.3901.00 (electronic datalogger).
• Origin: Northern Ireland, United Kingdom.
• Packaged dimensions: approximately 2.5 kg, 30 x 25 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: EC-3V-5H-IEC-IP43-SET.

FAQ

When should I choose the EC-3V?
Choose it when you need to record one, two or three phase voltages over time and do not need current or power-factor data.

Can it record a single phase?
Yes. The EC-3V can record one, two or three phases depending on how it is connected.

What is the difference between EC-3V and SL-3V?
Both are three-phase voltage recorders. The SL-3V is a smaller compact model, while the EC-3V is the larger standard model.

Can it help with voltage optimisation?
Yes. Recorded voltage data can help compare voltage before and after optimisation, and can support decisions about whether optimisation is appropriate.

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.