Time Current Curves; Mpro Electronic Trip Unit - GE M-PACT Plus Manual

M-PACT Plus

Time Current Curves

The MPRO electronic trip unit has many sophisticated setting
features and an extremely broad setting range. On request
we can provide complete
Time Current Curves covering all installed protection devices.
The curves can be produced for any current setting within
the range of the installed protection devices, for one or for a
combination of two breakers.
Please contact your local GE Sales Offi ce for more information.
A
B
C
X
A.10

MPRO Electronic Trip Unit

10000
2h
1000
LT Band
100
10
GF Band
1
0,1
0,01
Green & Light Blue Line = Full Clearing time
Red Line & Dark Blue Line = Non Tripping time
0,001
1 0 0 0
x Current in Amps (Strom in Ampere)
Time Current Curve
Breaker In= 2500A
----------------------------------
LT - Protection device
Set at Ie= 2400A
Ir at 0,9 =2160A
Band C-10
ST - Protection device
Set at 6x Ir of 2160A
Ist=12960A
Band STDB 10
I - Protection device
Set at 12 x Ie of 2400A
Ii = 28800A
GF - Protection device
Set at 0,6 x Ie of 2500A
(Ig = 1500A)
Band GFDB 6
I²t ON & OFF
ST Band
I I Band
HSIOC Band
1 0 0 0 0
7,2 x
1 0 0 0 0 0