Phase Current - GE L30 Instruction Manual

GROUPED ELEMENTS

5.7.4 Phase current

5.7.4.1 Menu
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT
 PHASE CURRENT

5
5.7.4.2 Inverse TOC curve characteristics
The inverse time overcurrent curves used by the time overcurrent elements are the IEEE, IEC, GE Type IAC, and I
curve shapes. This allows for simplified coordination with downstream devices.
If none of these curve shapes is adequate, FlexCurves can be used to customize the inverse time curve characteristics. The
definite time curve is also an option that can be appropriate if only simple protection is required.
Table 5-28: Overcurrent curve types
IEEE
IEEE Extremely Inverse
IEEE Very Inverse
IEEE Moderately Inverse
5-214
Figure 5-108: Stub bus logic
 PHASE TOC 1



 PHASE TOC 6


 PHASE IOC 1



 PHASE IOC 12


 PHASE

 DIRECTIONAL 1
 PHASE

 DIRECTIONAL 2
IEC
IEC Curve A (BS142)
IEC Curve B (BS142)
IEC Curve C (BS142)
IEC Short Inverse
See page 5-220
See page 5-222
See page 5-223
GE type IAC
IAC Extremely Inverse
IAC Very Inverse
IAC Inverse
IAC Short Inverse
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
2
t standard
Other
2
I t
FlexCurves A, B, C, and D
Recloser Curves
Definite Time