Phase Current - GE C70 Instruction Manual

CHAPTER 5: SETTINGS
Each of the six setting group menus is identical. Setting group 1 (the default active group) is active automatically when no
other group is active.
If the device incorrectly switches to group 1 after power cycling, upgrade the firmware to version 7.31 or later to correct
this issue.

5.7.3 Phase current

5.7.3.1 Menu
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT
 PHASE CURRENT

5.7.3.2 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 5-24: Overcurrent curve types
IEEE
IEEE Extremely Inverse
IEEE Very Inverse
IEEE Moderately Inverse
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
 BREAKER FAILURE


 VOLTAGE ELEMENTS


 PHASE TOC 1



 PHASE TOC 6


 PHASE IOC 1



 PHASE IOC 12


 PHASE

 DIRECTIONAL 1
 PHASE

 DIRECTIONAL 2
 PHASE CURRENT

 UNBALANCE 1

 PHASE CURRENT

 UNBALANCE 3
IEC
IEC Curve A (BS142)
IEC Curve B (BS142)
IEC Curve C (BS142)
IEC Short Inverse
See page 5-224
See page 5-234
See page 5-195
See page 5-197
See page 5-198
See page 5-201
GE type IAC
IAC Extremely Inverse
IAC Very Inverse
IAC Inverse
IAC Short Inverse
GROUPED ELEMENTS
2
t standard
Other
2
I t
FlexCurves A, B, C, and D
Recloser Curves
Definite Time
5-189
5