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10-6
Technical Data
857-UM001A-EN-P – July 2009
Table 10.16 – Overcurrent stages I>> and I>>> (50/51)
Pick-up current
Definite time function:
- Operating time
Start time
Reset time
Retardation time
Reset ratio
Transient over-reach, any τ
Inaccuracy:
- Starting
- Operation time
This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
Table 10.17 – Stall protection stage (48)
Setting range:
- Motor start detection current
- Nominal motor start current
Definite time characteristic:
- operating time
Inverse time characteristic:
- 1 characteristic curve
- Time multiplier t
>
DT
- Minimum motor stop time to activate
stall protection
- Maximum current raise time from
motor stop to start
Starting time
Resetting time
Resetting ratio
Inaccuracy:
- Starting
- Operating time at definite time function
- Operating time at IDMT function
This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
0.10 – 20.00 x I
(I>>)
MODE
0.10 – 40.00 x I
(I>>>)
MODE
0.04
– 300.00 s (step 0.01 s)
Typically 60 ms
<95 ms
<50 ms
0.97
<10 %
±3% of the set value
±1% or ±25 ms
1.30 – 10.00 xI
(step 0.01)
MOT
1.50 – 10.00 xI
(step 0.01)
MOT
1.0 – 300.0 s (step 0.1)
Inv
1.0 – 200.0 s (step 0.1)
500 ms
200 ms
Typically 60 ms
<95 ms
0.95
±3% of the set value
±1% or at ±30 ms
±5% or at least ±30 ms
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