GE C70 User Manual

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

GE C70 Specifications

General

Brand	GE
Model	C70
Category	Protection Device
Language	English