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Hsiang Cheng Corp. ®
Model RPWWH / RPKKH, Transducers
Watt / Watt hour and Var / Var hour 		 
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Hsiang Cheng RPW and RPK Watt transducers

  
 
  Product Parameters:  
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Input Option Option Option Option Output
Voltage 45~86 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
uni-direction* X1 / X3
1 pulse /wh or varh		 X2 / X4
10 pulse / wh or varh		 X1, X2, Y1, Y2:
open collector type
X3, X4, Y3, Y4:
reed relay type
Bi-direction* Y1 / Y3
1 pulse /wh or varh		 Y2 / Y4
10 pulse / wh or varh

1. uni. = uni-direction = 0 to +span bi = bi-direction = -span to 0 to +span
Example : 4-20mA = 0 to +1000W 4-12-20mA = -1000W to 0 to +1000W
2. For uni-directional transducers watts for forward power and vars for lagging power
3. For internal powered type ... zero based outputs and Vn operation range 85%~115%

* Pulse output

 
 
RPW - Watt Transducers
RPK- Var Transducers
Model   Application Standard Analog Cal.
Watts Hour Var Hour Elements 1A 5A  
       
RPWWH101  

1Ø 2W

 100
200
400		 500
1K
1.5K		 120V
240V
415V
RPWWH200 RPKKH200 3Ø 3W 100
200
400		 500
1K
1.5K		 120V
240V
415V
RPWWH201 RPKKH201 3Ø 3W* 200
400
800		 1K
2K
4K		 120V
240V
415V
RPWWH300 RPKKH300 3Ø 4W 100
200
400		 500
1K
1.5K		 120V
240V
415V
RPWWH301 RPKKH301 3Ø 4W* 200
300
600
1.2K		 200
300
600
1.2K		 69.3V
120V
240V
415V
 
Notes
  • Note :
    Voltage input :
    Phase voltage for 3 phase 4 wire (VP)
    Line to line voltage for 3 phase 3 wire (VL)

*Unbalanced
 
  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 sec
Voltage 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 688
2KV 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 sec
Voltage 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 < 7 VA
 
  Downloads:  
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  pdf_pic Downloads: General Specifications  
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