AEG ME09 Installation, Operation And Maintenance Manual page 47

2.2.3.6 (GF)
Mpro S和Mpro N
Rogowski
3
4 4
10
GF
x CT CT=
2.8 GFDB
Table 2.8 : Ground Fault tripping mes at indicated levels per selected GFDB band -I²t, OFF, in Milliseconds (²)
x Ir 1
110 120
0.2 x ± 10%
50 60
110 120
0.6 x ± 10%
50 60
(1) (24V DC) 0.1
(2) IEC 60479-1
(1) When an auxiliary supply is connected (24V DC) a extra se ng range of 0,1 to 0,2 becomes available.
(2)Timings in Red meet the requirements of the IEC 60479-1 and IEC60364 standards at a frequency of 50 cycles.
2.2.3.6.1 (GFDB)
(GFsum)
33
(Ig) 15%
In 0.01 x CT
0.2 1 x CT +24V DC
0.1 1 x CT
2 3 4 5
140 170 190
80 110 130
140 170 190
80 110 130
0.2
IEC 60364 50
2.2.3.6 Ground Fault Protec on (GF)
The GT-E, GT-S & GT-N Trip Units can op onally be equipped
with a ground fault protec on that operates on a residual
principle. (GFsum) The device u lizes the internal Rogowski
sensors in the circuit breaker to measure and to residually sum
all phase and neutral currents. When the groundfault op on is
chosen on a 3 pole breaker an addi onal 4th external sensor is
required for most applica ons (4 wire). The distance between
the circuit breaker and the external sensor is limited to 10
metres.
The GF pickup value tolerance band is 15% of the set current (Ig).
The ground fault pickup se ngs are set as mul ples of x CT
(CT=In of the circuit breaker) in steps of 0.01 x CT.
Without an auxiliary supply the se ng range is limited to 0.2 to
1 xCT. When a +24V DC contro voltage supply is connected the
se ng range is increased to 0.1 to 1 x CT.
－ I²t
6 7 8 9
240 270 340 400
180 210 280 340
240 270 340 400
180 210 280 340
2.2.3.6.1 Ground-Fault Delay (GFDB)
This func on sets the me delay before the breaker trips when
a ground-fault pickup current has been detected.
The Ground Fault Delay has three variants, a type with a xed
me delay bands, two I2T slopes or a steeper fuse type slope.
TRIP UNIT
(²)
10 11 12 13
450 600 700 800
390 540 640 740
450 600 700 800
390 540 640 740
2.
2
14
900
840
900
840
2.2-05