Supervision Functions; Current Circuit Supervision (Ccrdif); Current Circuit Supervision (Ccrdif) Main Settings; Ct Secondary Circuit Supervision (Ctsrctf) - ABB RET620 Product Manual

Transformer Protection and Control
RET620
Product version: 2.0

Supervision functions

Table 82. Current circuit supervision (CCRDIF)
Characteristic
1)
Operate time
1) Including the delay of the output contact
Table 83. Current circuit supervision (CCRDIF) main settings
Parameter
Start value
Maximum operate current
Table 84. CT secondary circuit supervision (CTSRCTF)
Characteristic
1)
Operate time
1) Including the delay of the output contact
Table 85. CT secondary circuit supervision (CTSRCTF) main settings
Parameter
Min operate current
Max operate current
Max Ng Seq current
Table 86. Fuse failure supervision (SEQRFUF)
Characteristic
Operate time 1)
1) Includes the delay of the signal output contact, f
measurements
ABB
Function
CCRDIF
CCRDIF
Function
CTSRCTF
CTSRCTF
CTSRCTF
NPS function
Delta function
= 50 Hz, fault voltage with nominal frequency injected from random phase angle, results based on statistical distribution of 1000
n
Value
< 30 ms
Value (Range)
0.05...0.20 x I
n
1.00...5.00 x I
n
Value
< 30 ms
Value (Range)
0.01...0.50 xIn
1.00...5.00 xIn
0.01...1.00 xIn
Value
Neg Seq voltage
U = 1.1 x set
Fault
Lev
U = 5.0 x set Neg Seq voltage
Fault
Lev
Voltage change rate < 30 ms
ΔU = 1.1 x set
Voltage change rate < 24 ms
ΔU = 2.0 x set
1MRS757846 A
Step
0.01
0.01
Step
0.01
0.01
0.01
< 33 ms
< 18 ms
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