VAMP Ltd Generator protection relay
Technical description
VAMP 210
VM210.EN004 Vamp 24h support phone: +358 (0)20 753 3264
53
Inaccuracy:
- Starting ±2% of set value
- Operating time ±1% or ±30 ms
*) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
Undervoltage stage U
1
< (27)
Function based on the measurement of the
positive phase sequence voltage
Setting range 20 – 120% x Ugn
Definite time function:
- Operating time 0.08 – 300.00 s (step 0.02 s)*
Undervoltage blocking 2 – 80% x Ugn (common with U
1
<<)
- Blocking time, when I< 1% x I
gn
0 – 30 s (common with U
1
<<)
Start time <60 ms
Reset time <60 ms
Reset ratio 1.03
Inaccuracy:
- Starting ±3% of set value or 0.5% of the rated value
- Operating time ±1% or ±30 ms
*) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
Undervoltage stage U
1
<< (27/60)
Function based on the measurement of the
positive phase sequence voltage
Setting range 20 – 80% x Ugn
Definite time function:
- Operating time 0.06 – 300.00 s (step 0.01 s)*
Undervoltage blocking 2 – 80% x Ugn (common with U
1
<)
- Blocking time, when I< 1% x I
gn
0 – 30 s (common with U
1
<)
Start time <30 ms
Reset time <60 ms
Reset ratio 1.03
Inaccuracy:
- Starting ±3% of set value
- Operating time ±1% or ±25 ms
*) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
5.3.4. Power protection stages
Thermal overload stage T> (49)
Settings:
- Time constant τ
2 – 60 min
- Max. allowed continuous load current k x
I
n
(^Θtrip = thermal trip level)
0.80 – 1.20 x I
n
- Heating alarm level Θalarm 60 – 99% x Θtrip
Underexcitation stage Q< (40)
Settings:
- Q1 and Q2 0 – -100% x S
gn
Definite time function:
- Operating time 0.08 – 300.00 s (step 0.02 s)*
Start time <60 ms
Reset time <60 ms
Reset ratio 1.03 (x S
gn
)
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