Modular voltage control relay | digital | 3 phase | 63A | 220V | DIN | overvoltage | undervoltage | current protection | TAXNELE (Kopija)

Modular voltage control relay | digital | 3 phase | 63A | 220V | DIN | overvoltage | undervoltage | current protection | TAXNELE (Kopija) 1

Modular voltage control relay | digital | 3 phase | 63A | 220V | DIN | overvoltage | undervoltage | current protection | TAXNELE (Kopija) 2

Modular voltage control relay | digital | 3 phase | 63A | 220V | DIN | overvoltage | undervoltage | current protection | TAXNELE (Kopija) 3

Modular voltage control relay | digital | 3 phase | 63A | 220V | DIN | overvoltage | undervoltage | current protection | TAXNELE (Kopija)

Code: ES-FRVA3-63A

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3-phase digital voltage and current protection relay designed to protect the electrical network from dangerous voltage fluctuations, phase imbalance, incorrect phase sequence, overcurrent, and other electrical network faults. The device automatically monitors the electrical network parameters and disconnects in hazardous conditions, thereby protecting connected equipment from failures or expensive repair work.

The relay is suitable for use in residential houses, workshops, industrial premises, pump control systems, compressor systems, server rooms, automation systems, solar power installations, and industrial electrical cabinets. The digital display allows real-time monitoring of network parameters, while adjustable protection settings provide the ability to adapt the relay according to the specific needs of the installation.

Product description

Three-phase voltage and current monitoring relay 1–63A – for network, load, and phase protection

The three-phase voltage and current monitoring relay is designed for monitoring electrical network parameters, load control, and protecting three-phase equipment from improper operating conditions. The relay monitors voltage, current, phase sequence, phase asymmetry, overvoltage, undervoltage, and overload, making it suitable for motors, pumps, compressors, fans, automation systems, and other electrical equipment.

Core concept:
This relay helps the electrical system understand whether voltage, current, phase sequence, and phase balance are suitable for safe equipment operation. If network parameters exceed set limits, the relay can disconnect or block the load via the control circuit, thereby protecting connected devices from damage.

Current range
1–63 A

Contacts
3 NO

Max. current
90 A / 10 min.

Installation
TN 35 / DIN rail

Working principle

The three-phase voltage and current monitoring relay tracks electrical network parameters and compares them against set limits. The device can react to overvoltage, undervoltage, overload, incorrect phase sequence, or phase asymmetry. Upon detecting unsuitable conditions, the relay can send a signal via its contacts to a contactor, control circuit, or automation system.

Why is phase sequence and asymmetry control necessary?
In three-phase motors, an incorrect phase sequence can change the direction of rotation, while phase asymmetry can lead to uneven operation, overheating, or power loss. Therefore, this relay is particularly relevant for pumps, fans, compressors, production equipment, and other systems where stable three-phase power is critical.

Technical parameters

Product type	Three-phase voltage and current monitoring relay
Standard	EN/IEC 60730-1
Rated voltage Un	230 V
Rated frequency	50/60 Hz
Insulation voltage Ui	450 V
Quantity and type of extra contacts	3 NO
Maximum switching current Imax	90 A / 10 min.
Set current range	1–63 A
Phase sequence	ON / OFF
Overvoltage setting range	220–280 V
Undervoltage setting range	80–210 V
Voltage measurement accuracy	1 %
Start-up delay	5–600 s
Overload response delay	0–600 s
Asymmetry control range	20–99 V / OFF
Asymmetry response delay	10 s
Overvoltage duration	OFF / 1–20 s
Operating mode settings	Asynchronous / synchronous
Password function	ON / OFF
Protection degree	IP20 – mount only in an electrical panel or protective enclosure
Electrical / mechanical endurance	10⁴ / 10⁶ cycles
Terminal wire size	0.5–25 mm²
Screw tightening torque	3.5 Nm
Installation	TN 35 / DIN rail
Altitude	Up to 2000 m
Ambient temperature range	-5...+40 °C
Storage temperature range	-25...+55 °C
Weight	About 0.33 kg

Where is it used?

Motor protection – when monitoring phase sequence, voltage, current, and load.
Pump control systems – in water supply, heating, drainage, or technological processes.
Compressors and fans – for protection against improper voltage, overload, and phase issues.
Automation cabinets – as a network condition and load monitoring component.
Agricultural, industrial, and commercial facilities – for protecting three-phase equipment from electrical network disturbances.

Practical installation example

For example, the relay is mounted in an electrical panel controlling a three-phase pump or fan. The relay monitors network voltage, current, and phase sequence. If overvoltage, undervoltage, incorrect phase sequence, or overload occurs, the relay can disconnect the contactor via control contacts and stop the equipment.

Such a scheme helps avoid motor overheating, incorrect rotation direction, unstable operation, and potential equipment damage due to electrical network issues.

Pros

Wide protection – monitors voltage, current, phase sequence, phase asymmetry, and overload.
Adjustable current range – can be set from 1 to 63 A.
Phase sequence control – helps protect three-phase motors from incorrect rotation direction.
Adjustable delays – can be adapted to specific equipment operating conditions.
3 NO contacts – convenient for use with control circuits, contactors, or automation systems.
Password function – helps protect settings from accidental changes.
DIN mounting – conveniently mounts in a standard electrical panel.

Cons / limitations

IP20 protection class – the relay must only be mounted in an electrical panel or closed enclosure.
Not suitable for direct outdoor use – requires an additional panel with appropriate IP rating for outdoor conditions.
Requires correct settings – incorrectly chosen limits can cause frequent or delayed tripping.
Installation must be performed by a professional – adherence to electrical safety and manufacturer instructions is mandatory.
For higher loads – may require a contactor, additional protection, or other control components.

Safety and installation notes

The three-phase voltage and current monitoring relay is an electrical panel component; therefore, before installation, one must evaluate the network circuit, load nature, contactor control, and protection requirements of the connected equipment.

Mount only in a panel: due to the IP20 protection class, the relay cannot be mounted in an open environment without an additional enclosure.
Before connection, check the rated voltage, current setting range, and contact purpose.
When used with motors, it is recommended to evaluate the need for a contactor, automatic protection, and thermal protection.
Do not exceed permissible loads – this can damage the relay or the control circuit.
Settings must be performed by a qualified specialist, taking into account the technical parameters of the specific equipment.

Quick selection guide

Three-phase voltage and current monitoring relay 1–63A – a suitable choice when you need to protect three-phase equipment from voltage fluctuations, overload, phase sequence errors, or phase asymmetry. The relay is mounted in an electrical panel on a TN 35 / DIN rail and can be used in conjunction with contactors, control circuits, or automation systems.

Current
1–63 A

Contacts
3 NO

IP class
IP20 – in panel only

Installation
TN 35 / DIN

Suitable when you need to:

monitor the state of a three-phase electrical network;
protect a motor, pump, compressor, or fan;
control overvoltage, undervoltage, and overload;
check phase sequence and phase asymmetry;
use the relay in an automation or control circuit.

Check before installation:

if the 1–63 A current range is suitable for the specific load;
if a contactor is needed for load control;
if the relay will be mounted in a closed electrical panel;
if phase sequence control should be enabled or disabled;
if the set delays correspond to the equipment's operating mode.

IP20 reminder:
This relay is not designed for direct outdoor mounting or in a damp environment. It must be mounted in an electrical panel, control cabinet, or a protective enclosure with an appropriate IP rating.

FAQ – frequently asked questions

What is this relay for?
It is designed for monitoring three-phase network voltage, current, phase sequence, phase asymmetry, and overload.

Is the relay suitable for motor protection?
Yes, it can be used for protecting motors, pumps, compressors, fans, and other three-phase devices.

What is the current setting range?
The current setting range is from 1 to 63 A.

Can phase sequence control be turned off?
Yes, phase sequence control has an ON / OFF setting.

Is this relay suitable for outdoor mounting?
Direct outdoor mounting is not recommended because the protection class is IP20. For outdoor conditions, an electrical panel or enclosure with the appropriate IP class must be used.

What kind of rail is it mounted on?
The relay is mounted on a standard TN 35 / DIN rail.

One relay – several important levels of electrical network protection

The three-phase voltage and current monitoring relay helps track key electrical network parameters and protect equipment from conditions that can lead to faults, overheating, or unstable performance.

Used together with a contactor, protection devices, and a control system, this relay becomes an important part of the electrical panel, helping ensure safer and more reliable operation of three-phase equipment.

Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

CE certificate – a guarantee of safety, quality, and compliance

This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.

CE certification means that the product has been evaluated according to the main criteria:

Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purpose

CE marking allows this product to:

be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environments

The CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.

What does this mean for you as a buyer?

Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions