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Electrical Transducers
LP-1W4 Watt Transducer

Data sheet

LP-1W4 Single Element Watt Transducer
LP-1W4H Single Element Watt Transducer with kWh Pulse Output

The LP-1W4 single element watt transducer converts ac current and voltage signals into a bi-directional dc output signal proportional to the active power flowing in the circuit.

The transducer is designed for 3 phase 4 wire systems with a balanced load.
Optional output for scalable kW-hour pulses. (LP-1W4H)

Ordering information: LP-1W4, inputs including CT & VT ratios, output, calibration, power supply.
Example: LP-1W4, inputs 250/5A 400V, output 0-10mA, 0-200kW, 230Vac supply


Basic Specifications:
InputsAC current and voltage, 3-phase 4 wire balanced load
Current: 0 - 1A or 0 - 5A (others on request)
Voltage: All ac system voltages to 440V
Frequency: 50Hz, 60Hz
OutputLoad independent bi-directional dc current and voltage
(others on request): -10mA to 0 to 10mA dc <1500Ω load
: -20mA to 0 to 20mA dc <750Ω load
: 4 to 20mA dc <750Ω load
: -5V to 0 to 5V dc >2kΩ load
: -10V to 0 to 10V dc >2kΩ load
Pulse: Scalable kW-hour pulses
: 2A, 110V, <10W dc (non-inductive)
Accuracy: Class 0.5 to IEC 60688
Range: 0 to 120% of nominal input
Power Supply: 24V, 110V, 230-240V, 400-415V ac ±20%, 1.5VA
: 24V dc ±20% or 110V/125V dc (88V-138V), 2W
IsolationGalvanic isolation between inputs, output circuit and supply
Test voltage: 4kV 50Hz ac for 1 minute
TemperatureOperating: 0°C to +23°C to +60°C
EMC Compliance: AS/NZS 61000.6.3:2012
DimensionsLP-1W4LP-1W4H
LP-6MLP-9M
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Carrel Electrade Limited
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