VAMP 265 - Page 209

Technical description
9 Technical data
9.3 Protection functions
VM265.EN011
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209
Unbalance stage I
2
>, I’
2
> (46)
Setting range:
2 – 70% (step 1%)
Definite time characteristic:
- operating time
1.0 – 600.0s s (step 0.1)
Inverse time characteristic:
- 1 characteristic curve
- time multiplier K
1
- Upper limit for inverse time
Inv
1 – 50 s (step 1)
1 000 s
Start time
Typically 300 ms
Reset time
<450 ms
Reset ratio
0.95
Inaccuracy:
- Starting
- Operate time
±1% - unit
±5% or ±200 ms
Stage is operational when all secondary currents are above 250 mA.
Earth fault stage I
0
> (50N/51N)
Input signal
I
0
( input X1-7 & 8)
I
02
( input X1-9 & 10)
I
0Calc
( = I
L1
+I
L2
+I
L3
)
Setting range I
0
>
0.02 … 8.00 When I
0
or I
02
0.05 … 20.0 When I
0Calc
Definite time function:
DT
- Operating time
0.08
**)
– 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 k
0.05  20.0, except
0.50  20.0 for RXIDG, IEEE and IEEE2
Start time
Typically 60 ms
Reset time
<95 ms
Reset ratio
0.95
Inaccuracy:
- Starting
±2% of the set value or ±0.3% of the rated
value
- Starting (Peak mode)
±5% of the set value or ±2% of the rated value
(Sine wave <65 Hz)
- Operating time at definite time function
±1% or ±30 ms
- Operating 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.