VAMP 59 - Page 200

9.3 Protection stages
9 Technical data
Technical description
200
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VM59.EN001
Directional earth fault stages I
0
>, I
0
>> (67N)
Pick-up current
0.005 – 20.00 x I
0N
( up to 8.00 for inputs other
than I
0Calc
)
Start voltage
1 – 50 %U
0N
Input signal
I
0
( input X6- 7 & 8 or X6- 7 & 9)
I
0Calc
( = I
L1
+I
L2
+I
L3
)
Mode
Non-directional/Sector/ResCap
Base angle setting range
-180 to + 179
Operation angle
±88
Definite time function:
- Operating time
0.10
**)
– 300.00 s (step 0.02 s)
IDMT function:
- Delay curve family
(DT), IEC, IEEE, RI Prg
- Curve type
EI, VI, NI, LTI, MI…depends on the family *)
- Time multiplier T
P
0.05 - 20.0
Start time
Typically 60 ms
Reset time
<95 ms
Reset ratio
0.95
Reset ratio (angle)
2
Inaccuracy:
- Starting U
0
&I
0
(rated value In= 1 .. 5A)
±3% of the set value or ±0.3% of the rated
value
- Starting U
0
&I
0
(Peak Mode when, rated
value I
0n
= 1 .. 10A)
±5% of the set value or ±2% of the rated value
(Sine wave <65 Hz)
- Starting U
0
&I
0
(I
0Calc
)
±3% of the set value or ±0.5% of the rated
value
- Angle
±2when U> 1V and I
0
> 5% of I
0N
else ±20
- Operate time at definite time function
±1% or ±30 ms
- Operate time at IDMT function
±5% or at least ±30 ms **)
*) EI = Extremely Inverse, NI = Normal Inverse, VI = Very Inverse, LTI = Long Time Inverse
MI= Moderately Inverse
**) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
Zero sequence voltage stages U
0
> and U
0
>> (59N)
NOTE! This is only available in voltage measurement mode U
0
.
Zero sequence voltage setting range
10 – 60 %U
0N
Definite time function:
- Operating time
0.3 – 300.0 s (step 0.1 s)
Start time
Typically 300 ms
Reset time
<450 ms
Reset ratio
0.97
Inaccuracy:
- Starting
±2% of the set value or ±0.3% of the rated value
- Operate time
±1% or ±150 ms