Reactive power transmitter

NegotiableUpdate on 12/11

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

S3 (T) - RHD, S3-RHD, N3-RHD type reactive power transmitter is a device that measures the reactive power of a system by separately collecting voltage and current signals and performing high-precision time division multiplier operations. It converts the reactive power of the system into a high linear ratio pulse output, which can be voltage pulse type, reactive voltage pure contact (optocoupler isolation) output, or relay contact output; And the transmitter's electrical energy constant (number of pulses per kilowatt hour) can be selected from multiple options, which facilitates data acquisition and reflects the load (inductive or capacitive) condition of the system.

Product Details

Reactive power transmitter

Overview

S3(T)-RHD,S3-RHD,N3-RHDType reactive powerA transmitter is a device that measures the reactive power of a system by separately collecting voltage and current signals and performing high-precision time division multiplier operations. It converts the reactive power of the system into a high linear ratio pulse output, which can be voltage pulse type, voltage free pure contact (optocoupler isolation) output, or relay contact output; And the transmitter's electrical energy constant (number of pulses per kilowatt hour) can be selected from multiple options, which facilitates data acquisition and reflects the load (inductive or capacitive) condition of the system. This series of instruments can operate continuously for a long time and is suitable for measuring reactive energy used for automated monitoring in non electric energy billing systems. Reactive energy is measured using the cross phase method: suitable for frequencies of50Hzor60HzMeasurement of three-phase three wire symmetrical balance system; Reactive energy is measured using phase-shifting method: suitable for frequencies of50Hzor60HzMeasurement of single-phase, three-phase three wire balanced or unbalanced systems, and three-phase four wire systems,Its phase-shifting circuit can ensure that the input signal is in40Hz-60HzWithin the range, no additional errors are generated due to changes in signal frequency, andThe relative error of reactive power measurement accuracy for S3 (T) and N3 series is less than or equal to 0.5% and 0.1%, respectively.

feature

This series of products has high measurement accuracy, good conversion performance, good temperature characteristics, and lightning protection function. The ability to measure reverse reactive energyIt has long-distance transmission capability (4~20mA, 500 Ω), fixed in accordance with DIN46277, and can be installed on 35mm aluminum rails.

Selection:

Example of filling in model and parameters:

（1）S3(T)-RHD-3-5553CBY

0.2 Three phase three wire reactive power transmitter (cross phase method)

Input nominal current:5A; Input nominal voltage:100V；

Standard output power⑤：866Var；

Input signal frequency:50±5Hz；

output range(electric constant)：10000 A pulse/kVarh

Output type: Voltage free pure contact(Optocoupler collector open circuit output)；

Auxiliary power supply:AC220V.

Need to measure reverse electrical energy (capacitive load)

（2）N3-RHD-3T-5552CBY

0.5 Three phase three wire reactive power transmitter

Input nominal current:5A; Input nominal voltage:100V；

Standard output power⑤：866Var；

Input signal frequency:50±5Hz；

output range(electric constant)：1000 A pulse/kVarh

Output type: Voltage free pure contact(Optocoupler collector open circuit output)；

Auxiliary power supply:AC220V.

Need to measure reverse electrical energy (capacitive load).

note① System: marked with T, measured using phase-shifting method; Measure using the cross phase method without T annotation.

② The output range (number of pulses) of the reactive power transmitter is calibrated at 1kVarh. to

In reactive power measurement, when the output is negative, it indicates that the capacitive impedance of the system is high;

When the output is positive, it indicates that the inductive impedance of the system is high.

③ Select the appropriate output type for the system, see active power annotation: item ②.

④ When measuring the positive and negative electrical energy of the system, the electrical energy signals are output separately.

⑤ The calibration of system power can be found in the previous active power annotation: item ②.

⑥ If the user requires other special calibrations, please specify the parameter values in the contract.