kW and kWh transducer with analogue and pulse outputs
The Unipower HPL503 measures true power on single-phase or three-phase networks (100-575 V) and converts it into a galvanically isolated analogue signal and pulse output. A built-in CT measures up to 40 A directly; external N/5 CTs extend the range to 1000 A. The unit outputs a scalable 0(4)-20 mA signal and generates pulses corresponding to 0.1/1/10 kWh for energy meters.
Technical Highlights 🔧
- Supply/measuring voltage: 1x100-400 VAC or 3x100-575 VAC.
- Current range: 0.5-40 A internal; external CTs up to 1000 A (N/5 A).
- Analogue output: 0(4)-20 mA (max load 400 ohm).
- Pulse output: selectable 0.1, 1 or 10 kWh per pulse for kWh metering.
- Frequency range: 45-65 Hz; accuracy class 2 %; consumption 2 VA.
- Dimensions: 110 x 56 x 75 mm; DIN-rail mounting.
Benefits ✅
- Provides both analogue and pulse outputs for versatile energy monitoring.
- True power measurement ensures accurate kWh recording regardless of power factor.
- Compatible with external CTs up to 1000 A for high-power applications.
- Easy setup via front keys; scalable output range to match desired kW range.
Applications 🚀
- Industrial energy management with analogue signals for PLCs and pulse outputs for kWh meters.
- Monitoring and control of motors, generators or plant loads on networks up to 575 V.
- Integration into SCADA systems requiring both instantaneous and cumulative energy data.
The HPL503 delivers accurate kW measurement and kWh pulses, making it ideal for energy monitoring and control applications across single-phase and three-phase networks.
FAQs
- Q: Does the HPL503 provide alarm functions?
A: No. It is a transducer for measurement and does not include relay outputs.
- Q: Can I choose the pulse value?
A: Yes. The pulse output can be set to 0.1, 1 or 10 kWh per pulse, making it easy to interface with different counters.
- Q: What is the maximum current without external CT?
A: The built-in CT measures up to 40 A directly; for higher currents use external N/5 A CTs.