ABB RET670 - Secondary System Supervision

Name Values (Range) Unit Step Default Description
C_UV1 0.000 - 1.000 - 0.001 1.000 Parameter C for customer programmable
curve for UV1
D_UV1 0.000 - 10.000 - 0.001 0.000 Parameter D for customer programmable
curve for UV1
P_UV1 0.001 - 10.000 - 0.001 0.020 Parameter P for customer programmable
curve for UV1
ResCrvType_UV2 Instantaneous
Frozen timer
Linearly decreased
- - Instantaneous Selection of reset curve type for UV2
tResetDef_UV2 0.00 - 6000.00 s 0.01 0.00 Reset time delay in sec for definite time use
of UV2
tResetIDMT_UV2 0.00 - 6000.00 s 0.01 0.00 Reset time delay in sec for Inverse-Time
curves for UV2
A_UV2 0.005 - 999.000 - 0.001 0.140 Parameter A for customer programmable
curve for UV2
B_UV2 0.500 - 99.000 - 0.001 1.000 Parameter B for customer programmable
curve for UV2
C_UV2 0.000 - 1.000 - 0.001 1.000 Parameter C for customer programmable
curve for UV2
D_UV2 0.000 - 10.000 - 0.001 0.000 Parameter D for customer programmable
curve for UV2
P_UV2 0.001 - 10.000 - 0.001 0.020 Parameter P for customer programmable
curve for UV2
3.11 Secondary system supervision
3.11.1 Current circuit supervision CCSRDIF (87)
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current circuit supervision CCSRDIF - 87
3.11.1.1 Application
Open or short circuited current transformer cores can cause unwanted operation of
many protection functions such as differential, ground-fault current and negative-
sequence current functions. When currents from two independent three-phase sets of
CTs, or CT cores, measuring the same primary currents are available, reliable current
circuit supervision can be arranged by comparing the currents from the two sets. If an
error in any CT circuit is detected, the protection functions concerned can be blocked
and an alarm given.
Section 3 1MRK504116-UUS C
IED application
572
Application manual