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CET Electric Technology
Figure 4-21 PF H Alarm Logic Diagram
The logic diagram of PF L Alarm is illustrated in Figure 4-22.
Figure 4-22 PF L Alarm Logic Diagram
4.3.7 Frequency Alarm
Since PMC-592 measures its frequency based on Uan/Uab of Mains-I only, the Frequency Alarm is
activated when Mains-I’s Uan/Uab
Voltage ON
Status
=
TRUE
.
The following table illustrates the Frequency Alarm parameters.
Parameters
Description
Range
Default Value
FREQ H Alarm Limit (Hz)
FREQ H Alarm Limit
45 to 65 (Hz)
65 (Hz)
FREQ H Alarm Time Delay (s)
FREQ H Alarm Time Delay
0 to 9999(s)
10s
FREQ L Alarm Limit (Hz)
FREQ L Alarm Limit
45 to 65 (Hz)
45 (Hz)
FREQ L Alarm Time Delay (s)
FREQ L Alarm Time Delay
0 to 9999(s)
10 (s)
Table 4-14 Frequency Alarm Parameters
The FREQ H/L Alarm Return Limits are illustrated below:
FREQ H Alarm Return Limit = FREQ H Alarm Limit – 0.1Hz
FREQ L Alarm Return Limit = FREQ L Alarm Limit + 0.1Hz
The logic diagram of FREQ H Alarm is illustrated in Figure 4-23.
Figure 4-23 FREQ H Alarm Logic Diagram
The logic diagram of FREQ L Alarm is illustrated in Figure 4-24.