Signals - ABB RELION 620 Series Technical Manual

Section 4
Protection functions
4.2.6.7
310
Time multiplier = 5, Maximum trip time = 3600000 milliseconds and Constant delay = 800
milliseconds.
GUID-78B05F4B-3434-4DD5-89F6-17F099444C04 V1 EN
Figure 141: Tripping curve of "OvExt IDMT Crv4" based on the specified settings. The
two dots marked on the curve are referred to in the text.
If the excitation level stays at 1.25, the tripping occurs after 15200 milliseconds. At the
excitation level of 1.42, the time to tripping would be 5900 milliseconds as per the two
dots in Figure 141. In this case, the setting Maximum trip time = 3600000 milliseconds
does not limit the maximum trip time because the trip time at Pickup value = 110% (1.1
pu) is approximately 75000 milliseconds.

Signals

Table 251: 24 Input signals
Name Type
I_A SIGNAL
I_B SIGNAL
I_C SIGNAL
I SIGNAL
1
Table continues on next page
Default Description
0 Phase A current
0 Phase B current
0 Phase C current
0 Positive-phase sequence current
1MAC504801-IB E
620 series ANSI
Technical Manual