ABB MPS-C 2000 Manual de instrucciones - Página 5
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Page 5
2.3.2 Trip time - Time is defined by the short time overcurrent curves (graph). I²t function is selectable.
I²t curves are fixed and do not vary with pickup settings. I²t is operational only from 2X to 4X. Trip times with I²t out
are defined as follows: Default is maximum with I²t in.
2.3.3 Reset time - Real time is counted up if the current exceeds the function threshold and counted down if the
current drops below the function threshold.
2.4 Instantaneous Function
2.4.1 Threshold (pickup) settings - 3 4 5 6 7 8 9 10 11 12 DISABLED. The settings are multiples of the range
selector setting and are made via the keypad and the LCD screen. If the short time unit is disabled, the
instantaneous unit cannot be disabled. Default is 12.
2.4.2 Trip time - There is no intentional delay in the instantaneous function.
2.4.3 The instantaneous unit includes a jumper on the circuit board which eliminates the possibility of instantaneous
and short time being simultaneously disabled.
2.5 Ground Function
2.5.1 Threshold (pickup) settings - These settings are made via the keypad and the LCD screen. This function may
also be disabled. Default is 1200 A.
Courtesy of NationalSwitchgear.com
Maximum =
0.350 - 0.500 sec
Intermediate = 0.20 - 0.320 sec
Minimum =
0.080 - 0.170 sec
SENSOR RATINGS
200
600
800
1600
2000
2500
3000
3200
4000
4200
SETTINGS
100,200,300,
600,900,& 1200A
300,400,600,
800,1000,& 1200A
500,600,800,
900,1000, & 1200A
ABB