Table 79. Voltage regulator (OLATCC) main settings, continued
Parameter
Function
Values (Range)
Step
Load phase angle
OLATCC
-89 - 89
1
Control delay time 1
OLATCC
1.0 - 300.0
0.1
Control delay time 2
OLATCC
1.0 - 300.0
0.1
Supervision and monitoring functions
Table 80. Circuit-breaker condition monitoring (SSCBR)
Characteristic
Value
Current measuring accuracy
At the frequency f = f
n
±1.5% or ±0.002 × I
n
(at currents in the
range of 0.1…10 × I
n
)
±5.0% (at currents in the range of 10…40 ×
I
n
)
Operate time accuracy
±1.0% of the set value or ±20 ms
Traveling time measurement
±10 ms
Table 81. Fuse failure supervision (SEQRFUF)
Characteristic
Value
Operation accuracy
At the frequency f = f
n
Current: ±1.5% of the set value or ±0.002 × I
n
Voltage: ±1.5% of the set value or ±0.002 × U
n
Operate time
1)
• NPS function
U
Fault
= 1.1 x set
Neg
Seq voltage Lev
U
Fault
= 5.0 x set
Neg
Seq voltage Lev
Typical 35 ms (±15
ms)
Typical 25 ms (±15
ms)
• Delta function
Δ
U = 1.1 x set
Voltage change rate
Δ
U = 2.0 x set
Voltage change rate
Typical 35 ms (±15
ms)
Typical 28 ms (±15
ms)
1) Includes the delay of the signal output contact, f
n
= 50 Hz, fault voltage with nominal frequency injected from
random phase angle
Transformer Protection and Control
1MRS756978 D
RET630
Product version: 1.1
Issued: 2011-05-18
56
ABB
