VDT45M
- Suitable for three phase supplies using CT’s (1A or 5A secondary)
- MID Approved
- Accuracy Class C (±0.5%)
- 4 module width, DIN rail installation
- Touch key design for easy setup and viewing of measurements
- Supports bi-directional measurement of active and reactive energy
- Multi-function parameter measurement for voltage, current, active power, reactive power, apparent power and power factor
- Offers RS485 Modbus communication and one passive pulse output
The VDT45M energy meter supports three phase and single phase loads using current transformers with a 1A or 5A secondary. This MID Approved meter can be used for billing applications and is highly accurate, class C (Cl. 0.5). It measures bi-directional energy, voltage, current, active power, reactive power, apparent power and power factor.
It provides an RS485 communication interface supporting Modbus and features a clear LCD screen. The touch key allows easy viewing of parameters and setup operations while the password protection function ensures data security.
Electrical Characteristics
| Supply voltage | 120 to 420 V DC |
| Power consumption | <4VA/0.5W |
| Rated voltage (Un) | 230/400V AC |
| Operational voltage | L-N: 30 to 350V AC L-L: 30 to 500V AC |
| PT1 (Primary) | 30 – 500,000V |
| Impedance of voltage measurement circuit | 1MΩ |
| Overload capacity of voltage | 2 x Un for 1 second |
| Rate current(lb) I | 5A |
| Maximum current (lmax) | 6A |
| Minimum current (lmin) | 0.05A |
| CT1 (Primary) | 1 – 9999A |
| Impedance of current measurement circuit | <0.01MΩ |
| Overload capacity of current | 20 x Imax for 0.5 second |
| Operational frequency range | 45 - 65Hz |
| Pulse constant | 5000 imp/kWh |
| Display | LCD with backlight |
| Maximum reading of energy | 9999999.9 kWh/kVArh |
| Measurement type | 3P4W, 3P3W, 1P2W |
Measurement Accuracy
| Voltage, Current | ±0.5% |
| Active power | 0.5% |
| Reactive power | ±2.0% |
| Apparent power | ±0.5% |
| Active energy | ±0.5% |
| Reactive energy | ±2.0% |
| Power factor | ±0.5% |
| Frequency | ±0.1% |
Environmental Characteristics
| Operating Temperature | -25 to +55°C |
| Storage Temperature | -40 to +80°C |
| Humidity | < 90%, non-condensing |
| Pollution Degree | 2 |
| Altitude | Up to 2000m |
| Vibration | 10 Hz to 150Hz, IEC 60068-2-6 |
| IP Degree of Protection | IP51 front display IP30 meter body |
Electromagnetic Characteristics
| Electrostatic Discharge | ±8kV (contact discharge) / ±15kV (air discharge) |
| Immunity to Radiated Fields | 10V/m, 80 - 2000MHz |
| Immunity to Electrical Fast Transients | ±4kV |
| Immunity to Surges | ±4kV |
| Immunity to Conducted Disturbances | 10V, 0.15-80MHz |
| Immunity to Magnetic Fields | IEC 61000-4-8 |
| Immunity to Voltage Dips | IEC 61000-4-11 |
| Radiated Emissions | Class B, according EN55011 |
| Conducted Emissions | Class B, according EN55011 |
| Harmonics Emissions | IEC 61000-3-2 |
Safety
| Overvoltage Category | CAT III, according to IEC 61010-1 |
| Measurement Category | CAT III, according to IEC 61010-1 |
| Insulation | AC Voltage Test: 4kV for 1 minute |
| Protective Class | II, according IEC61010-1 |
Communication
| Interfaces standard and protocols | 2-wire RS485, Modbus |
| 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 pc |
Pulse Output
| Interface type | Open collector opto-coupler |
| Pulse constant | Per pulse equal 0.001 / 0.01 / 0.1 / 1 kWh/kVArh |
| Pulse width | 60 / 100 / 200 milliseconds |
| Pulse output type | Active energy / Reactive energy (Tot, Imp & Exp) |
| Class | Class A, according to IEC 62053-31 |
| Input voltage | 5 to 27 VDC |