Installation

The device can be installed in an electrical panel on a DIN rail. Follow the steps below to install the device.

Note

The installation, use, and maintenance of electrical devices must be carried out exclusively by qualified personnel. Renua Società Benefit S.r.l. assumes no responsibility for any consequences resulting from the use of this material. Qualified personnel are those with adequate skills and knowledge regarding the structure, installation, and operation of electrical devices and who have received proper safety training to recognize and avoid inherent hazards. REFER TO THE Safety Information SECTION.

Mounting

Below are some figures showing how to mount and dismount the device on the DIN rail:

Figure 2 – Mounting/Dismounting on DIN Rail

Wiring

Important Note

All operations described in this section must be carried out exclusively by qualified personnel, in accordance with current technical and safety regulations.

Installing the device involves interaction with mains voltages up to 400 V: failure to follow safety instructions may result in serious risks of electric shock, equipment damage, and danger to people.

The analyzer must be installed downstream of a properly rated and clearly identified circuit breaker or line disconnector, positioned close to the device for easy access during isolation operations.

Before starting any installation or wiring activities, make sure the switch or disconnector is in the OFF position and verify the absence of voltage using a properly calibrated detector.

🧰 Required Materials

• RE-431 - Three-phase energy meter (DIN rail)
• DIN rail (standard 35 mm)
• Electrical cables (adequate cross-section according to load and CEI standards)
• Screwdrivers, wire strippers, multimeter
• Cable lugs (optional but recommended)
• Circuit breaker (recommended between the line and the meter)
• This technical manual (essential for exact wiring diagram)

🛠️ Installation and Connection Procedure (direct DIN rail version)

1. Power off the system and verify the absence of voltage on the conductors using an appropriate measuring instrument (e.g., multimeter), properly calibrated and functioning.
2. Install the RE-431-D device on a standard 35 mm DIN rail as shown in Figure 2, ensuring the attachment is stable and secure.
3. Connect the current inputs to the current transformers (CTs) strictly following the wiring diagram and respecting the correct phase-to-input correspondence: L1 → CT1; L2 → CT2; L3 → CT3; N → CTN

Note

This operation must be performed before securing the CTs on the power conductors to ensure the correct phase association.

4. Secure the current transformers (CTs) on each phase (L1, L2, L3, N), ensuring the correct sequence is strictly respected.

It is essential that the directional arrow on each CT body is oriented from the measurement point (meter or source – identified as "K") towards the load (electrical panel – identified as "L"), as shown in the figure below.

Note

Incorrect installation of the CTs can compromise the accuracy of current measurements and the direction of energy flows.

Figure 3 – Current Transformer (CT) Installation

5. Proceed with connecting the phase voltages [VOLTAGE INPUTS] according to the provided wiring diagram. It is strongly recommended to use a dedicated circuit breaker (4-pole, 6 A rating, minimum breaking capacity 6 kA) to protect the three-phase network analyzer. This solution ensures safety, efficiency, and regulatory compliance for the following reasons:
   1. Provides adequate protection against overloads and short circuits, reducing the risk of permanent damage.
   2. Allows functional isolation of the equipment, facilitating safe maintenance, inspection, or replacement without compromising system power continuity.
   3. Complies with relevant technical standards (e.g., CEI 64-8) and aligns with national and international best practices.
   4. Helps rationalize wiring, making it easier to identify anomalies and diagnose system faults.

Figure 4 - RE-431-D Power Connection

6. Connect the power supply inputs [POWER INPUT] to provide electrical power to the device.

If possible, connect the power inputs to an auxiliary or preferential line to ensure operational continuity of the analyzer even in case of anomalies or interruptions on the monitored electrical lines.

Figure 5 - General Connection RE-431 Energy Meter

Wireless Network Connection

To ensure a stable and reliable connection, the Wi-Fi signal must be adequate, and the network must have Internet access.

At the first startup (or after a network reset), the analyzer will automatically enter Access Point (AP) mode.

Using a computer or mobile device, access the list of available Wi-Fi networks and select the network named RE-XXXXXX.

After connecting, follow the instructions on the Wi-Fi configuration page displayed in the browser of the device connected to the analyzer’s Wi-Fi network.

Figure 6 - Wi-Fi Setup

After clicking “Scan,” the available wireless networks will be displayed.

Figure 7 - Wi-Fi Scan

Select your network name from the list, enter your network password, and click the "Connect" button.

Figure 8 - Wi-Fi Login with Network Credentials

If your network SSID is not listed, refresh the list by clicking the "Scan" button.

If the connection is successful, the analyzer's IP parameters will be displayed; then click “Save and Exit” to complete the setup.

Figure 9 - Network Connection

Access the device's integrated web page using the obtained IP address and continue configuring the analyzer parameters.

For stable operation, the Wi-Fi signal level should be greater than -70dB.

Measurement data is sent to the cloud. Data can be accessed via the Web Dashboard.

Functions

Analyzer Features

The analyzer measures currents and voltages, displaying RMS values in real time for all three phases and neutral. It also calculates power factor, active power, reactive power, and more.

Energy Readings

The analyzer calculates and stores total and partial energy values for active, reactive, and apparent energy.

Energy values can be viewed on the display. The energy value resolution automatically switches from kWh to MWh (kVAh to MVARh).

Analyzer Operation

Overview

The analyzer features a front panel with a status LED, a color graphic display, and a set of contextual function buttons.

These elements allow the operator to intuitively access operational information, as well as view, configure, and modify operating parameters according to application needs.

The navigation menu allows viewing, configuring, and resetting parameters.

General Information on the Display Screen

A	Wi-Fi Signal Level and SSID Name
B	Time – Local Format [HH:MM:SS]
C	Screen Content
D	Wi-Fi Interface IP Address
E	Status Notifications

Status Information

The status LED on the front panel indicates the current state of the analyzer.

The icons in the following table indicate LED status:

	= Off	= Blinking	= Solid	= Solid
Status LED	Analyzer Off	Startup Phase	Not Connected	Analyzer Connected

Wi-Fi and Factory Reset

To restore Wi-Fi or password factory settings, proceed as follows:

• Power off the device and then restore power. During startup, press the “UP” and “DOWN” buttons simultaneously until a confirmation message appears on the display indicating that Wi-Fi configuration has been restored to factory values.
• Power off the device and then restore power. During startup, press the “UP” and “Confirm” (rectangular) buttons simultaneously until a message appears on the display confirming that the password has been restored to factory default values.

Figure 10 - Wi-Fi and Password Factory Reset

Maintenance and Troubleshooting

Overview

The analyzer contains no user-serviceable components. For maintenance or repair, contact technical support at support@renua.it.

WARNING

RISK OF DAMAGE TO THE ENERGY ANALYZER

• Do not open the analyzer enclosure.
• Do not attempt to repair the analyzer components.

Failure to follow these instructions may result in damage to the device.

Do not open the analyzer. Opening the analyzer voids the warranty.

Diagnostic Codes

If anomalies are indicated by the status LED and/or display error icons, the system will automatically show a diagnostic code corresponding to the detected condition. If the problem persists despite applying the suggested solutions, contact technical support for assistance.

Diagnostic Code	RE-431	Description	Possible Solution
-	✅	Status LED appears off	Restart the analyzer by turning it off and on
-	✅	Buttons do not work	Restart the analyzer by turning it off and on

Maintenance and Troubleshooting

Diagnostic Code	RE-431	Description	Possible Solution
001	✅	Analyzer stops due to internal error	Restart the analyzer by turning it off and on
002	✅	Analyzer runs. Frequency settings do not match measured frequency	Correct frequency parameters according to the nominal network frequency
003	✅	Analyzer runs. Wiring settings do not match wiring inputs	Correct wiring settings according to the wiring inputs
004	✅	Analyzer runs. Phase sequence is reversed	Check cable connections or correct wiring settings
005	✅	Analyzer runs. Date and time reset occurred due to a power interruption	Restart the analyzer by turning it off and on. Check the device's Internet connection