Manual 37143A
MFR 15 - Protection Relay & Control
© Woodward
Page 101/119
Description of the Data Format
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NOTE
Certain addresses have two parts, the measured value and the exponent multiplier!
Voltage and current
0 to 9999 without sign
measured in [V, A], no exponent
Real power
0 to 9999 with sign
measured in [W]; data format: two's complement
positive = positive power
negative = negative power (reverse power)
Reactive power
0 to 9999 with sign
measured in [var]; data format: two's complement
positive
=
inductive
negative
=
capacitive
Frequency
measured in [Hz × 100]
Real energy
32 Bit
measured in [kWh]; data format: two's complement
positive = exported real energy
negative = imported real energy
power factor
-99 to +100
measured in [cos phi × 100]
positive = inductive, generator over-excited
negative = capacitive, generator under-excited
Scalable range (0..20 mA)
eg. k0.70..1.00..i0.70
Power factor cosphi = 1.00
k 0.00
Capacitive
(negative)
Lower distance
eg. 0030
Higher distance
eg. 0030
i 0.00
Inductive
(positive)
Figure 7-2: Interface, cosphi scaling