Table. 5.3.2 - 52. Internal inrush harmonic blocking settings.
Name
Range
Step
Default
Description
Inrush harmonic blocking (internal-
only trip)
0: No
1: Yes
-
0: No
Enables and disables the 2
nd
harmonic
blocking.
2
nd
harmonic blocking limit (Iharm/
Ifund)
0.10…50.00%I
fund
0.01%I
fund
0.01%I
fund
Defines the limit of the 2
nd
harmonic
blocking.
If the blocking signal is active when the pick-up element activates, a BLOCKED signal is generated and
the function does not process the situation further. If the START function has been activated before the
blocking signal, it resets and the release time characteristics are processed similarly to when the pick-
up signal is reset.
The blocking of the function causes an HMI display event and a-time stamped blocking event with
information of the startup current values and its fault type to be issued.
The blocking signal can also be tested in the commissioning phase by a software switch signal when
the relay's testing mode "Enable stage forcing" is activated (
General
→
Device).
The variables the user can set are binary signals from the system. The blocking signal needs to reach
the device minimum of 5 ms before the set operating delay has passed in order for the blocking to
activate in time.
Operating time characteristics for trip and reset
This function supports definite time delay (DT) and inverse definite minimum time delay (IDMT). For
detailed information on these delay types please refer to the chapter "General properties of a protection
function" and its section "Operating time characteristics for trip and reset".
Events and registers
The non-directional overcurrent function (abbreviated "NOC" in event block names) generates events
and registers from the status changes in START, TRIP and BLOCKED. The user can select which event
messages are stored in the main event buffer: ON, OFF, or both. The function offers four (4)
independent stages; the events are segregated for each stage operation.
The events triggered by the function are recorded with a time stamp and with process data values.
Table. 5.3.2 - 53. Event codes.
Event number
Event channel
Event block name
Event code
Description
1280
20
NOC1
0
Start ON
1281
20
NOC1
1
Start OFF
1282
20
NOC1
2
Trip ON
1283
20
NOC1
3
Trip OFF
1284
20
NOC1
4
Block ON
1285
20
NOC1
5
Block OFF
1286
20
NOC1
6
Phase A Start ON
1287
20
NOC1
7
Phase A Start OFF
1288
20
NOC1
8
Phase B Start ON
1289
20
NOC1
9
Phase B Start OFF
1290
20
NOC1
10
Phase C Start ON
A
AQ
Q-T215
-T215
Instruction manual
Version: 2.04
101