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Electrical Transducers
T-VA Apparent Power Transducers
T-VA Transducers

T-VA Apparent Power Transducers (VA)

The T-VA power transducers convert ac current and voltage signals into a load independent dc signal proportional to the apparent power (VA) flowing in the input circuit.

Optional VA-hour (T-VAH) transducers are a combined T-VA and T-INTP integrator in a common housing and give simultaneous VA and VA-hour outputs.
This does not apply to the 3 element 4 wire unbalanced load transducer T-3VA4, which because of limited space in the enclosure 100, is supplied as two separate units with the T-INTP integrator in enclosure 55.

Transducer Selection
Single PhaseT-1VA1(H)
Three PhaseBalanced loadUnbalanced load
Balanced supply
without neutral
Balanced supply
with neutral
Unbalanced supply
without neutral
Unbalanced supply
with neutral
Basic Specifications:
InputsAC current and voltage, single phase load
Current: 0 - 1A or 0 - 5A (others on request)
Voltage: All ac system voltages to 440V
Frequency: 50Hz, 60Hz
OutputLoad independent bi-directional dc current and voltage
(others on request): -10mA to 0 to 10mA dc <1500Ω load
: -20 to 0 to 20mA dc <750Ω load
: 4 to 20mA dc <750Ω load
: -5V to 0 to 5V dc >2kΩ load
: -10V to 0 to 10V dc >2kΩ load
Pulse: Scalable kVA-hour pulses
Accuracy: Class 0.5 to IEC 60688
Range: 0 to 120% of nominal input
Auxiliary Supply: 24V, 110V, 230/240V, 400/415V ac ±20%, 2VA
: 12V, 24V, 48V, 110V dc ±20%, 2W
IsolationGalvanic isolation between inputs, output circuit and auxiliary supply
Test voltage: 4kV 50Hz ac for 1 minute
TemperatureOperating: -10°C to +20°C to +50°C
EMC Compliance: AS/NZS 61000.6.3:2012
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