ABB Relion REG670, Technical Manual, Page: 521 / 1298

IEC05000748_2_en.vsd
UN ST1
TR1
ST2
TR2
START
TRIP
Comparator
UN > U1>
Start
t2
tReset2
&
Trip
Output
Logic
Step 2
Phase 1
Phase 1
Time integrator
tIReset2
ResetTypeCrv2
START
Start
t1
tReset1
&
Trip
Output
Logic
Step 1
Time integrator
tIReset1
ResetTypeCrv1
Comparator
UN > U2>
START
TRIP
TRIP
OR
OR
IEC05000748 V2 EN
Figure 248: Schematic design of Two step residual overvoltage protection
ROV2PTOV
9.3.8 Technical data
Table 283: ROV2PTOV technical data
Function Range or value Accuracy
Operate voltage,
step 1 and step 2
(1.0-200.0)% of UBase ± 0.5% of U
r
at U ≤ U
r
± 0.5% of U at U > U
r
Absolute
hysteresis
(0.0–50.0)% of
UBase
± 0.5% of U
r
at U ≤ U
r
± 0.5% of U at U > U
r
Inverse time
characteristics for
low and high step,
see table 972
- See table 972
Definite time delay
low step (step 1) at
0 to 1.2 x U
set
(0.00–6000.00) s ± 0.2% or ± 45 ms whichever is
greater
Definite time delay
high step (step 2)
at 0 to 1.2 x U
set
(0.000–60.000) s ± 0.2% or ± 45 ms whichever is
greater
Table continues on next page
1MRK502052-UEN B
Section 9
Voltage protection
515
Technical manual