Neutral Current - GE L30 Instruction Manual

5 SETTINGS
The phase directional element responds to the forward load current. In the case of a following reverse fault, the ele-
ment needs some time – in the order of 8 ms – to establish a blocking signal. Some protection elements such as
NOTE instantaneous overcurrent may respond to reverse faults before the blocking signal is established. Therefore, a
coordination time of at least 10 ms must be added to all the instantaneous protection elements under the supervi-
sion of the phase directional element. If current reversal is of a concern, a longer delay – in the order of 20 ms –
may be needed.
a) MAIN MENU

PATH: SETTINGS GROUPED ELEMENTS
 NEUTRAL CURRENT

MESSAGE
MESSAGE
MESSAGE
GE Multilin
Figure 5–68: PHASE DIRECTIONAL SCHEME LOGIC

SETTING GROUP 1(6)
 NEUTRAL TOC1

 NEUTRAL TOC2

 NEUTRAL IOC1

↓
 NEUTRAL IOC4

L30 Line Current Differential System
5.6 GROUPED ELEMENTS

5.6.5 NEUTRAL CURRENT


NEUTRAL CURRENT
See page 5-178.
See page 5-178.
See page 5-179.
See page 5-179.
5
5-177