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ats:meters

ATS Multi-Meters

Suggested multi-meters for Auto Mains Fail Transfer Switch :: Relay Logic.

  • Refer to product documentation for the correct wiring diagram.
Manufacturer Model Description Cost Link Image
RS Pro 1365377 3-digit, 3-line - V, A, kW, kVA, PF, kWH $76 RS Online
RS Pro 1365382 4-digit, 3-line - V, A, kW, kVA, PF, kWH
Contact closure alarm output
$86 RS Online
TruMeter APM APM-PWR 4 line + bar graph - V, A, kW, kVA, PF, kWH
Analog & digital outputs
$225 RS Online trumeter_apm_power.jpg
Three current transformers per meter are also required

Current Transformer Examples:

Manuf: Model Parameters Link
Simpson 01305 400A:5A, 2“ window https://us.rs-online.com/product/simpson/01305/70232978/
RS Pro 1718777 400A:5A, 30mm window https://us.rs-online.com/product/rs-pro/1718777/72303032/



DANGER: Current transformers must be connected to a device, or short-circuited before power is applied in the circuit to be measured. Current transformers are constant current devices, not constant voltage like ordinary transformers.

  • A C.T. with loose leads can have lethal voltage on the terminal, possibly over 1000V.
  • Do not disconnect a C.T. when power is present in the measured circuit!
ats/meters.txt · Last modified: 2024/06/10 22:54 by Alan Shea