Signals - ABB 615 series Technical Manual

1MAC059074-MB A
4.5.6.7
615 series ANSI
Technical Manual
IDMT curve operation are given as: Pickup value = 110%, Voltage Max Cont = 100%,
Time multiplier = 5, Maximum trip time = 3600 s, Constant delay = 0.8 s and Cooling time
= 100 s.
GUID-78B05F4B-3434-4DD5-89F6-17F099444C04 V1 EN
Figure 326: 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 15.20 s. At the excitation level
of 1.42, the time to tripping would be 5.90 s as per the two dots in
the setting Maximum trip time 3600 s does not limit the maximum trip time because the
trip time at Pickup value = 110% (1.1 pu) is approximately 75 s.

Signals

Table 558: 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
Section 4
Protection functions
Figure 326. In this case,
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