
Manual 37139C
UMT 1 - Measuring Transducer
Page 48/62
© Woodward
Description of the Data Format
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
NOTE
Certain addresses have two parts, the measured value and the exponent multiplier!
Voltage and current
0 to 9.999 without sign
measured in [V, A]
Real power
0 to 9.999 with sign (+/-) measured in [W]
positive = positive power
negative = negative power (reverse power)
Re-active power
0 to 9.999 with sign (+/-) measured in [var]
positive = inductive
negative = capacitive
Frequency
measured in [Hz × 100]
Real energy
32 Bit
measured in [kWh]
positive = supplied real power
negative = received real power
Re-active energy
32 Bit
measured in [kvarh]
positive = inductive re-active energy
negative = capacitive re-active energy
cos phi (power factor)
-
99 to 100
measured in [cos phi × 100]
positive = inductive, "generator" overexcited
negative = capacitive, "generator" underexcited
Definition of power factor scaling:
According to the scaling of the analog output, the power factor can be output
within the range from capacitive values ranging from c0.00 to unity power factor = 1 to inductive values up to
i0.00.
Scalable range (0 to 20 mA)
eg. c0.70 to 1.00 to i0.70
Power factor cosphi = 1.00
c 0.00
Capacitive
(negative)
Lower distance
eg. 0030
Higher distance
eg. 0030
i 0.00
Inductive
(positive)
Figure 7–7: Analog outputs - power factor scaling