1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Virone EM-3 Three-Phase Digital Energy Meter. This device is designed to measure active power consumption in a three-phase system, displaying readings in kilowatt-hours (kWh) on an LCD screen. Please read this manual thoroughly before installation and use to ensure safe and efficient operation.
2. Safety Information
- Professional Installation Required: Installation, maintenance, and repair of this device must be performed by a qualified electrician in accordance with local electrical codes and regulations.
- Power Disconnection: Always disconnect power to the circuit before installing, servicing, or removing the energy meter to prevent electric shock.
- Voltage and Current Ratings: Do not exceed the specified voltage and current ratings of the device (230V/400V~, 50/60Hz, 5A base, 80A max) to avoid damage or hazards.
- Environmental Conditions: Install the meter in a dry, well-ventilated area, protected from direct sunlight, moisture, and extreme temperatures. The device has an IP51 protection rating.
- Proper Wiring: Ensure all connections are secure and correctly wired according to the provided diagrams. Loose connections can cause overheating or malfunction.
- No User Serviceable Parts: Do not attempt to open or repair the device. Refer all servicing to qualified personnel.
3. Product Overview
The Virone EM-3 is a compact, DIN rail-mountable digital energy meter designed for accurate measurement of active energy in three-phase electrical systems. It features an LCD display for energy readings and an LED indicator for pulse output.
3.1. Front View and Display
Image Description: This image shows the front of the Virone EM-3 energy meter. The prominent feature is the LCD display, which shows the energy consumption in kWh. Below the display are three indicator LEDs labeled A, B, and C, corresponding to the three phases. The meter also displays "VIRONE EM-3 IEC61036 CE kWh" and specifications like "3x230/400V 3x5(80)A 50-60Hz Cl.1" and "1000imp/kWh". There are also universal safety symbols.
3.2. Side View and Wiring Terminals
Image Description: This image displays a side view of the Virone EM-3 energy meter, highlighting the wiring terminals. The top terminals are labeled "IN (wejście)" with connections for L1, L2, L3, and N (terminals 1, 3, 5, 7). The bottom terminals are labeled "OUT (wyjście)" with corresponding connections for L1, L2, L3, and N (terminals 2, 4, 6, 8). A small LED indicator for kWh pulses is also visible. The side casing includes manufacturing information: "ORNO-LOGISTIC Sp. z o.o. Gliwice, POLAND".
3.3. Angled View
Image Description: This image provides an angled view of the Virone EM-3 energy meter, showing both the front display and a portion of the side with a barcode and serial number "No 000307". This perspective helps visualize the overall form factor of the device.
3.4. Rear View and Product Label
Image Description: This image shows the rear of the Virone EM-3 energy meter, featuring the product label. The label indicates "EM-3", "Made in PRC for ORNO-LOGISTIC Sp. z o.o.", address details, "Bt. no: 1/02/2021", and a CE mark. A barcode with the number "5908254813207" is also visible. The DIN rail mounting clip and a sealed terminal cover are prominent.
4. Setup and Installation
The Virone EM-3 energy meter is designed for installation on a standard 35mm DIN rail (TH-35mm). Due to the nature of electrical work, installation must be carried out by a qualified professional.
4.1. Mounting
- Ensure all power to the installation point is disconnected at the main circuit breaker. Verify with a voltage tester.
- Locate a suitable 35mm DIN rail within an electrical enclosure.
- Hook the top edge of the meter onto the DIN rail.
- Press the bottom of the meter firmly until it clicks into place on the rail. Ensure it is securely fastened.
4.2. Wiring Connections
Refer to the wiring diagram on the side of the meter (see Section 3.2, Image Description) for correct connections. The meter is designed for a three-phase system.
- Input (IN - wejście): Connect the incoming L1, L2, L3 phase wires and the Neutral (N) wire to terminals 1, 3, 5, and 7 respectively.
- Output (OUT - wyjście): Connect the outgoing L1, L2, L3 phase wires and the Neutral (N) wire to terminals 2, 4, 6, and 8 respectively.
- Pulse Output (Optional): The meter provides a pulse output for remote reading or integration with energy management systems. Connect the pulse output terminals (marked with '+' and '-' or 20 and 21 on some diagrams) to a compatible pulse concentrator. The pulse output operates at 12~27V, current ≤ 27mA, with a pulse duration of 80ms.
- Ensure all terminal screws are tightened securely to prevent loose connections and potential hazards.
After wiring, double-check all connections for correctness and security before restoring power.
5. Operating Instructions
Once correctly installed and powered, the Virone EM-3 meter will automatically begin measuring energy consumption.
5.1. Reading the Display
The LCD display shows the total active energy consumed in kilowatt-hours (kWh). The display format is 6+2 digits, meaning 6 integer digits and 2 decimal digits, providing precise readings.
5.2. LED Indicators
- Phase Indicators (A, B, C): These LEDs illuminate to indicate the presence of voltage on each respective phase.
- Pulse LED (kWh): A red LED (often labeled "1000 imp/kWh" or similar) will flash. Each flash indicates a specific amount of energy consumed (e.g., 1000 pulses per kWh). The frequency of flashes is proportional to the instantaneous power consumption.
5.3. Pulse Output
The pulse output provides electrical pulses proportional to the energy consumed. This feature allows the meter to be integrated into external energy monitoring or building management systems. The pulse rate is 800 pulses per kWh (imp/kWh).
6. Maintenance
The Virone EM-3 energy meter is designed for long-term, maintenance-free operation. No routine maintenance is required.
- Cleaning: If necessary, gently wipe the exterior of the meter with a soft, dry cloth. Do not use abrasive cleaners, solvents, or liquids directly on the device.
- Inspection: Periodically inspect the wiring connections for any signs of loosening or damage. Any issues should be addressed by a qualified electrician with the power disconnected.
- No User Serviceable Parts: The meter contains no user-serviceable parts. Any internal issues require replacement of the unit by a qualified professional.
7. Troubleshooting
This section addresses common issues you might encounter with the Virone EM-3 energy meter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or off. | No power supply to the meter. | Check the main circuit breaker. Verify wiring connections (L1, L2, L3, N) are secure and correctly connected. Consult a qualified electrician. |
| kWh LED is not flashing. | No load connected or very low power consumption. Faulty meter. | Ensure there is an active electrical load connected downstream of the meter. If a load is present and the LED still does not flash, the meter may be faulty. Consult a qualified electrician for inspection or replacement. |
| Incorrect energy readings. | Incorrect wiring. Meter malfunction. | Verify all wiring connections against the diagram. Ensure input and output phases are correctly matched. If wiring is correct, the meter may be faulty. Consult a qualified electrician. |
| Pulse output not working. | Incorrect pulse output wiring. Incompatible receiving device. Meter malfunction. | Check the pulse output wiring. Ensure the receiving device is compatible with the meter's pulse specifications (12~27V, ≤ 27mA, 80ms pulse). Consult a qualified electrician. |
For any issues not resolved by the above steps, or if you are unsure about any electrical procedures, always contact a qualified electrician.
8. Specifications
| Parameter | Value |
|---|---|
| Type | Three-phase |
| Supply Voltage | 230V/400V ~, 50/60 Hz |
| Base Current (Ib) | 5 A |
| Maximum Current (Imax) | 80 A |
| Minimum Current (Imin) | 0.25 A |
| Pulse Frequency | 800 imp / kWh |
| Measurement Accuracy Class | 1 |
| MID Compliance (2014/32/EU) | No |
| Display | 6 + 2 digits (LCD) |
| Pulse Output | Yes (12~27V, ≤ 27mA, 80ms pulse) |
| Multiple Tariff | No |
| Number of Modules | 4.3 |
| Protection Rating | IP51 |
| Dimensions (W/H/D) | 76 / 116.5 / 65 mm |
| Manufacturer | Virone (Made in PRC for ORNO-LOGISTIC Sp. z o.o.) |
| Package Dimensions | 11.2 x 9.3 x 8.2 cm; 420 grams |
9. Warranty and Support
Information regarding specific warranty terms for the Virone EM-3 energy meter is not provided in this manual. Please refer to the retailer or manufacturer's official website for warranty details.
For technical support or service, please contact your point of purchase or the manufacturer, Virone/ORNO-LOGISTIC Sp. z o.o., using the contact information typically found on their official website or product packaging. Spare parts availability information is not available.
