Ice NP900 Series, Инструкция по применению

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Application Guide - NP900 Series 192 (504
)
A996A
Figure 3.2.20-96 Simplified function block diagram of the RPW function.
3.2.20.1 M
EASURED INPUT VALUES
Three phase active power value is used for the function block. For pre-fault data
registering is used -20ms averaged value.
Table 3.2.20.1-133 Measurement magnitudes used by the RPW function.
Signal Description Time base
3PH Active power (P)
Total 3 phase active power
5 ms
3.2.20.2 P
ICK
-
UP CHARACTERISTICS
Pick-up of the RPW function is controlled by
Pset rev.
setting parameter, which defines
the maximum allowed measured three phase active power before action from the function.
The function constantly calculates the ratio in between of the Pset rev. and measured
magnitude (Pm). Reset ratio of 97 % is inbuilt in the function and is always related to the
Pset rev.
value.
Table 3.2.20.2-134 Pick-up characteristics setting
Name Description Range Step Default
Pset rev. Pick-up setting 0.0…100000 kW 0.01 kW 100 kW
The pick-up activation of the function is not directly equal to start-signal generation of the
function. Start signal is allowed if blocking condition is not active.