PV POWER VERIFIER LR8400-92, LR8400-93

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PV POWER VERIFIER LR8400-92, LR8400-93

Verify the Correct Power Level to Solve Power Loss Problems

  • Estimate expected electricity production (estimated electrical energy)
  • Estimate the expected electricity production at the current time under continuously varying conditions of air temperature and insolation
  • Compare the estimate with actual electricity production
  • Production can be measured without shutting off the circuit
  • Measure the production trend
  • Investigate module failures by identifying strings with wiring breaks and using the instrument in conjunction with a masking shield
  • Add up to 7 more channels of clamp or temperature measurements even in PV mode
  • When PV mode is turned OFF, the instrument can also be used as a 30-channel data logger
  • When PV mode is turned OFF, optional input units can be added to expand the instrument to a maximum of 60 channels

PV mode Basic specifications (Accuracy guaranteed for 1 year)

Input
(Fixed channels)
(Automatic setting of conversion ratio)
[unit1-ch1] Voltage measurement mode, 1 V f.s., 1,000 V conversion ratio
[unit1-ch2] Current measurement mode, 1 V f.s., 1,000 A conversion ratio
[unit1-ch3] Insolation measurement mode, 20 mV f.s., 140 kW/m2 conversion ratio
[unit1-ch4] Panel temperature measurement mode, K thermocouple 100°C f.s., 1°C conversion ratio
Expansion channel settings [unit1-ch5] to [unit1-ch11] Select and add as voltage, thermocouple, or clamp (2,000 A, 200 A, 100 A, 20 A, 10 A).
*[unit1-ch12] to [unit1-ch15] and [unit2-ch1] to [unit2-ch15] cannot be used in PV mode.
Equations
(Fixed channels)
(Automatic setting of equation)
[W1] Power (kW) = Voltage (Ch. 1-1) × current (Ch. 1-2)
[W2] Power integration (kWh) = Voltage (Ch. 1-1) × current (Ch. 1-2) × measurement time (h)
[W3] Estimated power (kW) = Insolation strength (Ch. 1-3) / Gs (standard test condition of 1 kW/m2) × (1 + temperature loss*1) × (1 - coefficient for other losses) × photovoltaic cell rated output (kW)
[W4] Estimated integration (kWh) = Insolation strength (Ch. 1-3) / Gs (standard test condition of 1 kW/m2) × (1 + temperature loss*1) × (1 - coefficient for other losses) × photovoltaic cell rated output (kW) × measurement time (h) *1 Temperature loss = Photovoltaic cell maximum output temperature coefficient × (panel temperature (Ch. 1-4) - 25) / 100
[W5] AC estimated power (kW) = Estimated power (w3) × power conditioner conversion efficiency (reference value)
[W6] AC estimated integration (kWh) = Estimated energy (w4) × power conditioner conversion efficiency (reference value)
[W7] Estimated power approximation rate (%) = Energy (w2) / estimated energy (w4)
Display PV Wave + Value, PV Wave + Crsr, Gauge + PV Wave, PV Value, Estimate Power, AC Estimate (reference values)
Other specifications Functionality is identical to that of the LR8400-20 when PV mode is OFF.