Application
The OTUS 3 for RES is a bidirectional smart meter designed for photovoltaic installations connected to the power grid. It facilitates settlement for prosumers using the net energy metering (NEM) method and supports various energy balancing approaches. This meter is also suitable for autonomous or stand-alone installations.
Features
- Bidirectional measurement of active energy
- Four-quadrant measurement of reactive energy
- Four tariff metering
- Measurement of voltage, current, instantaneous power, and maximum power
- Recording of measured data in 15-minute load profiles, 10-minute voltage and phase current profiles, daily profiles, and monthly billing periods
- Integrated disconnector
- Local communication via infrared port (EN-62056-21) using DLMS/COSEM protocol
- Remote access via interchangeable GSM-based communication modules under the terminal cover, RS485 port (optional), or built-in Wireless M-Bus (EN 13757) on 868 MHz (optional)
- Authorized and encrypted communication via DLMS/COSEM protocol
- Power limiter controlled locally or remotely via DSM/DSR signals
- Remote, non-legally relevant firmware updates
- Segment LCD display for text messages
- Immunity to external magnetic fields
- Neutral current measurement, balancing phase current and neutral current
- Event and alarm handling
- Optional relay contact output (240 V AC / 5 A) or SO impulse output
Basic Technical Data
| Parameter | Specification |
|---|---|
| Model | OTUS 3 |
| Connection method | Direct |
| Rated voltage (Un) | 3x230/400 V |
| Reference current (Iref) | 5 A |
| Maximum current (Imax) | 80 A |
| Frequency | 50 Hz |
| Accuracy of active energy measurement | acc. EN 50470-3 Class B |
| Accuracy of reactive energy measurement | acc. EN 62053-23 Class 2 |
| Insulation | 4 kV (AC 50 Hz), 6 kV (surges 1.2/50 μs) |
| Pulse rate | 2500 imp/kWh |
| RTC (Real-Time Clock) | Internal, accuracy better than 0.5 s/24 h at 23°C |
| Communication | GSM module (under terminal cover), RS485 (optional), Wireless M-Bus (EN 13757) on 868 MHz (optional) |
| Display | LCD, display area: 65 x 20 mm |
| Operating temperature | -40 to +70°C |
| Casing | Protection class II |
| Ingress protection rating | IP54 |
| Standards | EN 50470-1, EN 50470-3, EN 62053-23, PN-EN 60529 |
Visual Description
The document features images of the Apator OTUS 3 meter, showcasing its front, side, and top views. Technical drawings illustrate the meter's dimensions and connection points. Key measurement indicators such as kWh, kvarh, instantaneous power P(t), and maximum power Pmax are visually represented.
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