text: Voltage Rating - mo2210142
  
  Custom Search
  
  where:
  Rr =
  register ratio found on front plate, back plate, or frame of
  register
  Kh = watthour constant
  TF = transformer factor = CT ratio x PT ratio
  Gr =
  first gear reduction ratio usually 50 or 100 (obtain from
  manufacturer)
  Self-contained meters, used for domestic service and small industry, usually
  have a multiplier of either 1, in which case no multiplier would be shown, or
  10.  Whenever the multiplier is more than 1, the words "multiply by", followed
  by a number appear on the front plate. For transformer-rated meters, which
  are used with instrument transformers for heavy industrial and central station
  metering, the multiplier can be 10, 100, 1,000, 10,000, etc. In this case the
  register is supplied for only one transformer factor.  The multiplier can also
  be numerically equal to the transformer factor.  If so the register will read
  in terms of secondary energy and be read on a "secondary-reading register*'.
  In any watthour meter, the total energy in kWh is equal to the product of the
  watthour constant (Kh) and the disk revolutions divided by 1,000:
  Kh x disk revolutions counted
  kWh =
  1,000
  To determine total energy in kilowatt hours as counted by a transformer-rated
  meter, the secondary reading register would be multiplied by the ratio of the
  instrument transformers which is called the transformer factor. In a system
  using current transformers with a rated primary current of 20 amperes, total
  energy registered would equal:
  Kh x disk revolutions 20
  x
  =
  kWh
  5
  1,000
  If the system also contained a PT with a 7,200 to 120 ratio, the total energy
  registered would equal:
  Kh x disk revolutions 20 7,200
  x
  x
  kWh =
  1,000
  5
  120
  In this example, the numbers 4 (20/5) and 60 (7,200/120) are the ratios of CT
  and PT respectively.  Their product, 240 (4 x 60), is the transformer factor
  for this meter. Whatever value is shown on the secondary register must be
  multiplied by the transformer ratio to obtain the correct number of kWh used
  in the primary circuit.
  2.1.6.3 Voltage Rating.
  Meters are available for 120-, 240, or 480-volt
  service as required.
  9-16
explanation: The document provides technical information about watthour meters, including details on register ratios, watthour constants, transformer factors, and how to calculate total energy in kilowatt hours. It also explains the voltage ratings for different meters. The text contains several mathematical formulas and examples but does not present a specific question or a question-and-answer format.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
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distilabel_metadata.role: system
distilabel_metadata.content: Voltage Rating - mo2210142
  
  Custom Search
  
  where:
  Rr =
  register ratio found on front plate, back plate, or frame of
  register
  Kh = watthour constant
  TF = transformer factor = CT ratio x PT ratio
  Gr =
  first gear reduction ratio usually 50 or 100 (obtain from
  manufacturer)
  Self-contained meters, used for domestic service and small industry, usually
  have a multiplier of either 1, in which case no multiplier would be shown, or
  10.  Whenever the multiplier is more than 1, the words "multiply by", followed
  by a number appear on the front plate. For transformer-rated meters, which
  are used with instrument transformers for heavy industrial and central station
  metering, the multiplier can be 10, 100, 1,000, 10,000, etc. In this case the
  register is supplied for only one transformer factor.  The multiplier can also
  be numerically equal to the transformer factor.  If so the register will read
  in terms of secondary energy and be read on a "secondary-reading register*'.
  In any watthour meter, the total energy in kWh is equal to the product of the
  watthour constant (Kh) and the disk revolutions divided by 1,000:
  Kh x disk revolutions counted
  kWh =
  1,000
  To determine total energy in kilowatt hours as counted by a transformer-rated
  meter, the secondary reading register would be multiplied by the ratio of the
  instrument transformers which is called the transformer factor. In a system
  using current transformers with a rated primary current of 20 amperes, total
  energy registered would equal:
  Kh x disk revolutions 20
  x
  =
  kWh
  5
  1,000
  If the system also contained a PT with a 7,200 to 120 ratio, the total energy
  registered would equal:
  Kh x disk revolutions 20 7,200
  x
  x
  kWh =
  1,000
  5
  120
  In this example, the numbers 4 (20/5) and 60 (7,200/120) are the ratios of CT
  and PT respectively.  Their product, 240 (4 x 60), is the transformer factor
  for this meter. Whatever value is shown on the secondary register must be
  multiplied by the transformer ratio to obtain the correct number of kWh used
  in the primary circuit.
  2.1.6.3 Voltage Rating.
  Meters are available for 120-, 240, or 480-volt
  service as required.
  9-16
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document provides technical information about watthour meters, including details on register ratios, watthour constants, transformer factors, and how to calculate total energy in kilowatt hours. It also explains the voltage ratings for different meters. The text contains several mathematical formulas and examples but does not present a specific question or a question-and-answer format.
  
  Label: no-question