Datasheet

ESG 6.28
Function description
Window function (WIN, WIN+LATCH)
When the supply voltage U is applied, the set interval of the tripping
delay (ON-Delay) begins. During this period and independent of the
measured value the output relay R remains into off-position.
The output relay R switches into on-position after the set interval of
the tripping delay (ON-Delay) has expired and if the frequency is
within the adjusted window. As soon as the frequency leaves the
accepted value the output relay R swiches into off-position after the
interval of the tripping delay (Delay) has expired
WIN
The output relay R switches into on-position again after the frequen-
cy re enters the accepted value and the tripping delay (ON-Delay)
has expired.
WIN + LATCH
The output relay R switches only into on-position again by interrup-
ting and re-applying the supply voltage, provided that the measured
frequency is within the adjusted window after the interval of the
tripping delay (ON-Delay) has expired.
Recognition of missing measuring voltage
If the measuring voltag is missing (red LED UFailure illuminated) the
output relay switches into off-position. When the measured voltage
and frequency stays within the set limits for more than the ON-Delay
the output relay energises.
If the fault latch is activated (WIN+LATCH) a detected frequency
fault will not be reset by interrupting and re-applying the measuring
voltage.
Frequency monitoring relay for 50/60 Hz
power grids
EMR DF22Q