ABB REM 610, Руководство по эксплуатации продукта

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Table 20. Three-phase definite time overcurrent protection (I
s
>)
Feature
1) Value
Set start value, I
s
>
At definite-time characteristic 1.00...10.0 x I
n
Start time, typical 55 ms
Time/current characteristic
• Definite-time operate time, t
s
> 0.30...80.0 s
Resetting time, typical/maximum 35/50 ms
Retardation time 30 ms
Drop-off/start ratio, typical 0.96
Operate time accuracy at definite time
characteristic ±2% of the set operate time or ±25 ms
Operation accuracy ±3% of the start value
1) Stage I
s
2
x t
s
and stage I
s
> cannot be used at the same time.
Table 21. Motor startup supervision based on thermal stress calculation (I
s
2
x t
s
)
Feature
1) Value
Set startup current motor, I
s
> 1.00...10.0 x I
n
Start time, typical
• At start criterion I
L
>I
s
100 ms
Set startup time for motor, t
s
> 0.30...80.0s
Resetting time, typical/maximum 180/250 ms
Drop-off/pick-up ratio, typical
• At start criterion I
L
>I
s
0.96
Operation accuracy ±10% of the calculated operate time ±0.2 s
Shortest possible operate time 300 ms
1) Stage I
s
2
x t
s
and stage I
s
> cannot be used at the same time.
Motor Protection 1MRS756304 C
REM610
Product version: C
Issued: 30.10.2009
20 ABB