VAMP 257 - Frequent Start Protection (66) Settings; Auto-Reclose Function (79) Settings

VAMP 257 Feeder and motor manager
Technical description
VAMP Ltd
142
VAMP 24h support phone : +358 (0)20 753 3264
VM257.EN002
Directional earth fault stages I
0
ϕ
>, I
0
ϕ
>> (67N)
Pick-up current 0.01 - 4.00 x I
0n
Start voltage 1 – 20 %U
0n
Input signal I
0
( input X1-7 & 8)
I
02
( input X1-9 & 10)
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 k 0.05 - 20.0
Start time 60 ms
Reset time 80 ms
Reset ratio 0.95
Inaccuracy:
- Starting (rated value I
n
= 1 .. 5A) ±3% of the set value or ±0.5% of the rated value
- Angle
±2°
- Operate time at definite time function ±1% or ±30 ms
- Operate time at IDMT function ±5% or at least ±30 ms (I< 50 x I
n
)
*) 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.
Limitations:
The maximum measured secondary current is 10 A for input signal I
0
, 50 A
for input signal I
02
and 250 A for calculated signal I
0Calc
. This limits the
scope of inverse delays if the setting is more than the maximum measured
current divided by 20.
5.3.3. Frequent start protection
Frequent start protection N> (66)
Settings:
- Max motor starts
- Min time between motor starts
1 – 20
0.0 – 100 min. (step 0.1 min)
5.3.4. Auto-reclose function
AR function (79)
Settings:
- Reclaim time 0.02 – 300.00 s (step 0.01 s)
- CB pulse length 0.02 – 10.00 s (step 0.01 s)
- CB ready timeout 0.02 – 30.00 s (step 0.01 s)
- DI to get open information Any digital input
- DI to get close information Any digital input
- DI to get ready information Any digital input
- DI to block reclose function Any digital input
- DI to inhibit reclose function Any digital input
AR shot settings (shot1 - shot5):
- Deadtime 0.02 – 300.00 s (step 0.01 s)
- Discrimination time 0.02 – 300.00 s (step 0.01 s)
- Start delay (start1 - start4) 0.02 – 300.00 s (step 0.01 s)