Model RPWH / RPKH Watt hour and Var hour Transducer Series

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Hsiang Cheng RPW and RPK Watt transducers

Product Parameters:
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Input Option Option Option Option Output
Voltage 85-150 85~150 180~300 300~500 0-1 mA 0-20 mA 4-20 mA
Current 0 – 1.2 A 0 – 6 A 4~12~20 mA 0~10 mA 0~1 V
Hz 48 – 52 Hz 58 – 62 Hz 0~5 V 0~10 V 2~10 V
Aux. Pwr. 120V 240V AC 415V / Internal powered * 1~5 V 1~3~5 V
*DC powered- on request
RPW – Watt TransducersRPK- Var Transducers
Model Application Standard Analog Cal.
Watts Hour Var Hour Elements 1A 5A
RPWH101 1Ø 2W 100200400 5001K1.5K 120V240V415V
RPWH200 RPKH200 3Ø 3W 100200400 5001K1.5K 120V240V415V
RPWH201 RPKH201 3Ø 3W* 200400800 1K2K4K 120V240V415V
RPWH300 RPKH300 3Ø 4W 100200400 5001K1.5K 120V240V415V
RPWH301 RPKH301 3Ø 4W* 200300600 1.2K 1K1.5K3K 6K 69.3V120V240V 415V
Notes
  • Note :Voltage input- Phase voltage for 3 phase 4 wire (VP) Line to line voltage for 3 phase 3 wire (VL)
  • Note :1. uni-direction for watthour of forward power, for varhour of lagging power2. For internal powered type … zero based outputs and Vn operation range 85%~115%
*Unbalanced
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Specifications :
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General Specifications
Accuracy ( 23±3°C ) 0.2% RO
Maximum output load Current related input : 2 x rated continuous, 10 x rated 10 sec, 25 x rated 2 sec, 50 x rated 1 secVoltage related input : maximum 2 x rated continuous ( 120V / 240V ), maximum 1.5 x rated continuous ( 415V )
Dielectric strength 4KV AC rms 1 minute between terminals to case IEC 6882KV AC rms 1 minute between input / output / power IEC 688
Maximum input Current related input : 2 x rated continuous, 10 x rated 10 sec, 25 x rated 2 sec, 50 x rated 1 secVoltage related input : maximum 2 x rated continuous ( 120V / 240V ), maximum 1.5 x rated continuous ( 415V )
Output of WH or VarH Open collector type, maximum 30V / 30mA; reed relay type, maximum 50V / 40mA
Impulse / SWC IEC 255-4, 5KV 1.2x50us, IEC255-22-1, 2.5KV ( 1MHz / 400Hz )
Input burden Current 0.3VA typically; voltage 0.2VA typically
Response time & ripple < 400ms for step change 0-95%, ripple less 0.5% ro peak-peak
Frequency 50± 2Hz, 60 ±2Hz
Aux. power effect < 0.005% for per voltage change
Stability
Temperature range ( 20 to 26°C ) long term stability / year
Maximum 100ppm/ , less 0.2% drift per year typically
Storage condition Temperature range -25 to 70°C, RH 20 to 95% non condensed
Operating condition Temperature range -20 to 65°C, RH 0 to 99% non condensed
Magnetic field effect < 0.05% change 1M center 100 amper-turn, synchronized with line frequency
Enclosure code Case IP 50 / terminals IP 30, complies with IEC 529, BS 5490 DIN 40050
Power supply AC 120V / 240V 15%, 50 / 60Hz
Power dissipation < 4 VA
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pdf_pic Downloads: General Specifications
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