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Load resistors to raise the secondary load of current transformers, model WSR60

Load resistors to raise the secondary load of current transformers, model WSR60

Product catalog summary
Technical Specifications
  • Housing Material: Polycarbonate (PC)
  • Ambient Temperature: 40°C
  • Operating Conditions: -10 to +20%
  • Current Rating: 1.0*In continuous / 60*In for 1 second
  • Insulation Class: E
  • Frequency: 162/3, - 50, - 60Hz
  • Accuracy: Ensured by maintaining connected burden between 25% and 100% of rated burden as per IEC60044-1
Ordering Specifications
  • Type 1A: 4WS006, 4WS003, 4WS005
  • Type 5A: 4WS000, 4WS001, 4WS002, 4WS004
Resistance and Models
  • Resistance Values: 1.5 Ω, 2.5 Ω, 4 Ω, 0.04Ω, 0.06Ω, 0.1Ω, 0.16Ω
  • Models: WSR30, WSR40
Load Resistors for Current Transformers

The new static kWh-meters have lower power consumption compared to old electro-mechanical devices. This necessitates the use of load resistors to ensure the current transformer operates within the required burden range (25% to 100% of rated burden) to maintain accuracy and instrument security.

Wiring Diagram and Dimensions
  • CT Inputs: L1, L2, L3
  • Dimensions: 40, 80, 60, 65.5, 30, 65.5, 60, 80 (WSR30, WSR40)
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Catalog excerpts

Load resistors to raise the secondary load of current transformers, model WSR60-1

FAGET loadresistors for current transformers Diffrent to the old electro-mechanical devices the new, static kWh-meters are characterised by a significantly lower power consumption. This effect holds the risk of charging the current transformer with a burden below the minimum value. Subject to standard IEC60044-1, the connected burden must obtain a value between 25% and 100% of the rated burden. Thereby, a more favourable instrument security factor is achieved and the class accuracy ensured. The load resistors have been specially developed to bring the charge of a current transformer within 25% and 100% of the value mentioned on the type plate of the power transformer. The resistor has a reactance-free character because of which no extra phase displacement is caused. Technical specification Accuracy Rated therminal current Class of insulation Frequency -10 -+20% 1,0*In continue / 60*In/1s E 162/3, -50, -60Hz Ambient temperature 40°C Housing Polycarbonate (PC) Ordering specification Wiring diagram Type number Model P(VA) Rsistance Type 5A 4WS000 WSR30 1 0,043 4WS001 WSR30 1,5 0,063 4WS002 WSR30 2,5 0,13 4WS004 WSR40 4 0,163 Type 1A 4WS006 WSR30 1,5 1,5 3 4WS003 WSR30 2,5 2,5 3 4WS005 WSR40 4 4 3 L1 L2 L3 I S1 WSR 1 CT input (L1) S2 P1 S1 WSR 1 II CT input (L2) P2 S2 P1 S1 WSR 1 II CT input (L3) P2 S2 P2 IELEQ* develops, produces anrl markets FAGET"" and KWIf" WWW.ELEQ.COM

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