Name
Description
Range
Step
Default
fset<
fset<<
fset<<<
fset<<<<
Pick-up setting
5.00…75.00Hz
0.01Hz 49Hz
f> operating time
f>> operating time
f>>> operating time
f>>>> operating time
f< operating time
f<< operating time
f<<< operating time
f<<<< operating time
Operation time
0.000...1800.00s 0.005s 0.1s
The pick-up activation of the function is not directly equal to the START signal generation of the
function. The START signal is allowed if the blocking condition is not active.
Operating time characteristics for trip and reset
This function supports definite time delay (DT). For detailed information on this delay types please refer
to the chapter "General properties of a protection function" and its section "Operating time
characteristics for trip and reset".
Read-only parameters
The relay's
Info page displays useful, real-time information on the state of the protection function. It is
accessed either through the relay's HMI display, or through the setting tool software when it is
connected to the relay and its Live Edit mode is active.
Table. 5.4.14 - 141. Information displayed by the function.
Name
Range
Step
Description
f</> LN
behaviour
1: On
2: Blocked
3: Test
4: Test/Blocked
5: Off
-
Displays the mode of FRQV block.
This parameter is visible only when
Allow setting of individual LN
mode is enabled in General menu.
f</> condition
0: Normal
1: Start
2: Trip
3: Blocked
-
Displays the status of the protection function.
f meas / f set
0.000..20.000f
m
/f
set
0.001f
m
/f
set
The ratio between the measured frequency and the pick-up value.
Expected
operating
time
0.000...1800.000s
0.005s
Displays the expected operating time when a fault occurs.
Time
remaining to
trip
-1800.000...1800.000s 0.005s
When the function has detected a fault and counts down time towards
a trip, this displays how much time is left before tripping occurs.
Function blocking
The block signal is checked in the beginning of each program cycle. The blocking signal is received
from the blocking matrix in the function's dedicated input. If the blocking signal is not activated when
the pick-up element activates, a START signal is generated and the function proceeds to the time
characteristics calculation.
A
AQ
Q-M257
-M257
Instruction manual
Version: 2.07
166
© Arcteq Relays Ltd
IM00021
Summary of Contents for AQ-M257
Page 1: ...AQ M257 Motor protection IED Instruction manual...
Page 2: ......
