1. General
DF433 multifunction meter (panel mount) is a new generation miniature electricity meter developed by Dongfang Electronics Co., Ltd., resulting from many years experience in designing electricity meters.
LCD display and electricity pulse output function is installed in the power meter. Data swap with the super ordination machine via RS485 communication interface greatly facilitating the power automated administration.
This meter has advantages of smaller volume, high precision, good EMC, easily installing etc, meet the related technical requirements of electronic power meter in the IEC60688 standard and IEC62053-22/23,etc..
2. Product Specification
Type | Accuracy class | Rated voltage | Current specification | Pulse constant | Auxiliary power supply |
DF433 | 0.2S | 3×63.5/110V 3×230/400V | 3×1 (2) A | 60000 imp/kWh | DC48 V~ DC270 V |
3. Technical Parameter
Item | Technical Value | |
Accuracy class | Active: class 0.2S Reactive: class 2 | |
Rated voltage Un | 3×63.5/110V | 3×230/400V |
Current specification | 1 (2) A | |
Operational voltage | Normal Operational voltage range:0.8~1.2Un Limit Operational voltage range:0.7~1.3Un | |
Auxiliary power supply | DC 48V(85%~125%) or DC 220V (85%~125%) | |
Reference frequency | 50Hz +/-5Hz | |
Starting current | Direct connection | 0.004Ib |
CT connection | 0.002In | |
Power consumption | Voltage circuits | ≤0.2VA/phase |
Current circuits | ≤0.6VA/phase | |
Electricity pulse output | Pulse width:80ms±20ms Photo isolator, collector open output | |
Digital communication | RS485, MODBUS-RTU(customized other protocol) | |
Clock error | ≤0.5s/d | |
Temperature range | Working temperature: -25℃~+60℃ Storage temperature: -40℃~+85℃ | |
Relative humidity | ≤95% (Non condensation) | |
Dimension(L×W×H) | 144×144×137(mm) | |
Panel cutout | 138×138 (mm) | |
Weight | 900g | |
Mean time between failure(h) | ≥50000 | |
4. Installing and wiring
5. Application description
No. | Name | Status | Function |
1 | LED Display |
| Data and parameters display |
2 | Active | Indicator light | Active energy pulse |
3 | Reactive | Indicator light | Reactive energy pulse |
4 | PF | Indicator light | Current displayed data is “Power factor” |
5 | Hz | Indicator light | Current displayed data is “Frequency” |
6 | V | Indicator light | Current dispalyed data unit is “V” |
7 | A | Indicator light | Current dispalyed data unit is “A” |
8 | W | Indicator light | Current dispalyed data unit is “W” |
9 | var | Indicator light | Current dispalyed data unit is “var” |
10 | Wh | Indicator light | Current dispalyed data unit is “Wh” |
11 | varh | Indicator light | Current dispalyed data unit is “varh” |
12 | M | Indicator light | Current dispalyed data value should multi with million |
13 | K | Indicator light | Current dispalyed data value should multi with kilo |
14 | “Enter” | Bottun | Confirm |
15 |
| Bottun | Shift the selection of increment the value |
16 |
| Bottun | Shift the selection |
17 | “SET” | Bottun | Set |
Function description
Measure
DF433 can measure A, B, C three phase to neutral voltage, three phase to phase voltage, three phase current, neutral current, each phase, total active power, reactive power, apparent power, power factor, power frequency. At the same time it can record import, export active/ reactive/ apparent electric energy, maximum demand(optional), maximum and minimum voltage, current, active power, reactive power, apparent power(optional).
Clock
Clock error is within 0.5s/day, with automatic switching function for calendar, clocking and leap year;
Display
7 bits wide-temperature type LED display;
DF433 has cycling display and key display function, can inquiry all display items by panel buttons, if no key is pressed within 8 seconds, switch automatically to cycling display state, one cycle is 4s.
Output
Function of active/reactive electric energy pulse output is used for calibration, collecting electric energy;
Passive photo-electro isolating type output port, pulse width: 80ms±20ms.
Communication
Interface: RS485;
Protocol: MODBUS-RTU;
Baud rate (bps):19200, 9600(default), 4800, 2400, 1200.
Programming function
Communication parameter settings:
Address, Baud rate, Stop bits, Parity bits;
PT ratio settings;
CT ratio settings;
Integration time(Demand period) (optional);
Energy / Max demand clearing(optional).
Meter reading and power management functions
RS485 composed of a wired network for remote automatic meter reading, to achieve power of intelligent management.