Active power in motor drives and phase-angle controlled equipment needs a signal that process control systems can use directly. WM500 converts active power from symmetric 1- and 3-phase power supply systems into proportional standard analog signals.
The transmitter supports 1 A or 5 A current input ranges and voltage inputs up to 440 V, with a 45 ... 400 Hz frequency range. Devices without compensating circuits measure active power where voltage curve shape is insignificant, including frequency inverter-controlled electric motor drives. For 3-phase sinusoidal voltage, the compensating circuit version nearly eliminates additional error caused by deviations between line and nominal voltage.
Selectable 0/4 ... 20 mA or 0/2 ... 10 V outputs simplify integration into automation systems. Full 3-port isolation, < 0.2 % accuracy and a compact 22.5 mm polycarbonate case for TH35 DIN rail mounting support dependable use in industrial control cabinets.
The transmitter is available for symmetric 1-phase or 3-phase power supply systems, with ordering variants for common measuring voltages.
Current input is available as 0 ... 1 A or 0 ... 5 A. Voltage input covers 0 ... 440 V and supports connection via direct access or transformers.
Models are available without a compensating circuit or with an integrated compensating circuit for sinusoidal 3-phase voltage applications.
Output is selected as 0/4 ... 20 mA or 0/2 ... 10 V. A link between terminals 8 and 9 configures voltage-to-current output operation.
The power factor cosφ is switch selectable between 0.72 and 1, using the front-panel control.
The final value can be adjusted from -30 ... 5 %, allowing the configured measuring range to be matched to the application.
Supply voltage variants include 230 V AC ± 10 % and 24 V DC ± 15 %, depending on the selected ordering code.
| Voltage range |
0...440 V
|
|---|---|
| Current range |
0...5 A
|
| Frequency range |
45...400 Hz
|
| Degree of protection terminals |
IP20
|
|---|---|
| Operating temperature |
-10...+50 °C
|
| Number of analog outputs (active) |
1
|
|---|---|
| Type of analog output |
4…20 mA, 0…20 mA,0…10 V, 2…10V
|
| Accuracy |
0...0 % 0.2 %
|
| Burden (current output) |
500 Ω
|
| Materials |
Polycarbonate, UL94V-0
|
|---|
| CE Conformity |
Yes
|
|---|
| Electrical connection type |
Terminals
|
|---|
| Auxiliary voltage |
230 V AC, 24 V DC
For 230 V AC ±10 % 50 ... 60 Hz: 230 V AC For 24 V DC ±15 %: 24 V DC |
|---|---|
| Auxiliary voltage tolerance |
± 10 %, ± 15 %
For 230 V AC ±10 % 50 ... 60 Hz: ± 10 % For 24 V DC ±15 %: ± 15% |
