> For the complete documentation index, see [llms.txt](https://docs.yobiiq.com/user-manual-em4302t-lrw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yobiiq.com/user-manual-em4302t-lrw/device/technical-specifications.md).

# Technical Specifications

## Electrical Characteristics

| **Type of measurement**                         | RMS including harmonics on AC system, support 1P2W, 3P3W, 3P4W                                     |
| ----------------------------------------------- | -------------------------------------------------------------------------------------------------- |
| **Measurement accuracy**                        |                                                                                                    |
| Voltage, Current                                | Class 0.5, according IEC 61557-12                                                                  |
| Active power                                    | Class 0.5, according IEC 61557-12                                                                  |
| Reactive power                                  | Class 2, according IEC 61557-12                                                                    |
| Apparent power                                  | Class 1, according IEC 61557-12                                                                    |
| Active energy                                   | Class 0.5S, according IEC 62053-22, IEC 61557-12                                                   |
| Reactive energy                                 | Class 2, according IEC 62053-23, IEC 61557-12                                                      |
| Power factor                                    | Class 1, according IEC 61557-12                                                                    |
| Frequency                                       | Class 0.2, according IEC 61557-12                                                                  |
| Harmonic distortion                             | Class 2, according IEC 61557-12                                                                    |
| **Data update rate**                            | 1 second. Optional 100 ms                                                                          |
| **Input-Voltage**                               |                                                                                                    |
| Rate voltage (Un)                               | 230 Vac (L-N) / 400 Vac (L-L)                                                                      |
| <p>Measured range</p><p>(Direct connection)</p> | 30 to 300 Vac (L-N), 30 to 500 Vac (L-L)                                                           |
| PT primary                                      | 30 to 500000                                                                                       |
| Impedance                                       | 1MΩ                                                                                                |
| Frequency range                                 | 45 to 65 Hz                                                                                        |
| Overload capacity                               | 2\*Un for 1 second                                                                                 |
| **Input-Current**                               |                                                                                                    |
| CT2 (Secondary)                                 | <p>1A or 5A</p><p>Optional: 100mA, 100mV</p>                                                       |
| CT1 (Primary)                                   | 1 to 9999 A                                                                                        |
| Measured range                                  | 0.003 to 6 A, basic current (Ib) is 5A                                                             |
| Impedance                                       | <0.01 ohm                                                                                          |
| Overload capacity                               | 120A for 0.5 second                                                                                |
| **Auxiliary power supply**                      |                                                                                                    |
| Operating range                                 | 80 \~ 300 Vac / 100 \~ 420 Vdc                                                                     |
| Frequency                                       | 45 \~ 65 Hz                                                                                        |
| Power consumption                               | < 4VA/0.5W                                                                                         |
| **Pulse output**                                |                                                                                                    |
| Interface type                                  | Open collector optocoupler                                                                         |
| Pulse constant                                  | Per pulse equal 0.001/0.01/0.1/1/10/100 kWh/kvarh (Configurable)                                   |
| Pulse width                                     | 60/100/200 milliseconds (Configurable), default is 100milliseconds                                 |
| Pulse output type                               | <p>Import/export/total active energy,</p><p>Import/export/total reactive energy (Configurable)</p> |
| Class                                           | Class A, according IEC 62053-31                                                                    |
| Input voltage                                   | 5 \~ 27 Vdc                                                                                        |
| **Pulse indicator light on the panel**          | Pulse constant is 5000imp/kWh, Represents the total active energy of the secondary side            |
| **Real-time clock accuracy**                    | 0.5 s/d                                                                                            |

## Mechanical

| IP Degree of Protection (IEC 60529) | Designed to IP51 front display, IP30 meter body |
| ----------------------------------- | ----------------------------------------------- |
| Dimensions (W X H X D)              | 72 x 100 x 66 mm                                |
| Mounting Position                   | DIN Rail mounting                               |
| Material of meter case              | UL 94 V-0                                       |
| Environmental Characteristics       |                                                 |
| Operating Temperature               | -25 to +55℃                                     |
| Storage Temperature                 | -40 to +80℃                                     |
| Humidity                            | < 90%, non-condensing                           |
| Pollution Degree                    | 2                                               |
| Altitude                            | Up to 2000m                                     |
| Vibration                           | 10 Hz to 150Hz, IEC 60068-2-6                   |

## Electromagnetic

| Electrostatic Discharge                                                                                                  | Level 4, according IEC 61000-4-2(1) |
| ------------------------------------------------------------------------------------------------------------------------ | ----------------------------------- |
| Immunity to Radiated Fields                                                                                              | Level 3, according IEC 61000-4-3(1) |
| Immunity to Electrical Fast Transients                                                                                   | Level 4, according IEC 61000-4-4(1) |
| Immunity to Surges                                                                                                       | Level 4, according IEC 61000-4-5(1) |
| Immunity to Conducted Disturbances                                                                                       | Level 3, according IEC 61000-4-6(1) |
| Immunity to Magnetic Fields                                                                                              | IEC 61000-4-8(1)                    |
| Immunity to Voltage Dips                                                                                                 | IEC 61000-4-11(1)                   |
| Radiated Emissions                                                                                                       | Class B, according EN55011          |
| Conducted Emissions                                                                                                      | Class B, according EN55011          |
| Harmonics                                                                                                                | IEC 61000-3-2(1)                    |
| (1): The experimental test is carried out according to the grade requirements of industrial grade products in IEC61326-1 |                                     |

## Safety

| Measurement Category | CAT III, according IEC 61010-1    |
| -------------------- | --------------------------------- |
| Overvoltage Category | CAT III, according IEC 61010-1    |
| Insulation           | AC Voltage Test: 4kV for 1 minute |
| Impulse Voltage Test | 6kV - 1.2/50µS waveform           |
| Protective Class     | II, according IEC61010-1          |

## Communications

| Interfaces standard and protocols | <p>2-wire RS485, Modbus RTU</p><p>Optional: MBus</p> |
| --------------------------------- | ---------------------------------------------------- |
| Baud rate                         | 1200 to 38400 bps, default is 9600 bps               |
| Parity bit                        | None, Even, Odd, default is None                     |
| Stop bit                          | 1 or 2, default is 1                                 |
| Response time                     | <100ms                                               |
| Transmission mode                 | half-duplex                                          |
| Transmission distance             | Up to 1000m                                          |
| Max. Bus loading                  | 64 pcs                                               |

## LoRaWAN

| Frequency            | EU868                 |
| -------------------- | --------------------- |
| Mode                 | OTAA or ABP (Class C) |
| Antenna              | Internal              |
| Auto Upload          | Max. 100 parameters   |
| Auto upload interval | Configurable          |

## Certifications

* MID Module B+D
* IEC/EN62052-11
* EMC - EN61326-1 / EN61326-2-3
* LVD - EN61010-1 / EN61010-2-3


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