Grouped Elements; Overview; Setting Group; Phase Current - GE UR F35 Series Instruction Manual

5.6 GROUPED ELEMENTS

5.6GROUPED ELEMENTS
Each protection element can be assigned up to six different sets of settings according to setting group designations 1 to 6.
The performance of these elements is defined by the active setting group at a given time. Multiple setting groups allow the
user to conveniently change protection settings for different operating situations (for example, altered power system config-
uration, season of the year, etc.). The active setting group can be preset or selected via the
Control Elements section later in this chapter). See also the Introduction to Elements section at the beginning of this chap-
ter.

PATH: SETTINGS GROUPED ELEMENTS
 SETTING GROUP 1

5
Each of the six setting group menus is identical. Setting group 1 (the default active group) automatically becomes active if
no other group is active (see the Control elements section for additional details).
If the device incorrectly switches to group 1 after power cycling, upgrade the firmware to version 7.25, 7.31, or later to cor-
rect this issue.
a) INVERSE TIME OVERCURRENT CURVE CHARACTERISTICS
The inverse time overcurrent curves used by the time overcurrent elements are the IEEE, IEC, GE Type IAC, and I
dard curve shapes. This allows for simplified coordination with downstream devices.
If none of these curve shapes is adequate, FlexCurves may be used to customize the inverse time curve characteristics.
The definite time curve is also an option that may be appropriate if only simple protection is required.
Table 5–19: OVERCURRENT CURVE TYPES
IEEE
IEEE Extremely Inverse
IEEE Very Inverse
IEEE Moderately Inverse
A time dial multiplier setting allows selection of a multiple of the base curve shape (where the time dial multiplier = 1) with
the curve shape (
CURVE
to the time multiplier (
TD MULTIPLIER
or base curve values. Setting the multiplier to zero results in an instantaneous response to all current levels above pickup.
5-142


SETTING GROUP 1(6)

 PHASE CURRENT

 NEUTRAL CURRENT
MESSAGE

 WATTMETRIC
MESSAGE
 GROUND FAULT
 GROUND CURRENT
MESSAGE

 NEGATIVE SEQUENCE
MESSAGE
 CURRENT
 VOLTAGE ELEMENTS
MESSAGE

IEC
IEC Curve A (BS142)
IEC Curve B (BS142)
IEC Curve C (BS142)
IEC Short Inverse
) setting. Unlike the electromechanical time dial equivalent, operate times are directly proportional
) setting value. For example, all times for a multiplier of 10 are 10 times the multiplier 1
F35 Multiple Feeder Protection System
SETTING GROUPS
See below.
See page 5-150.
See page 5-153.
See page 5-157.
See page 5-159.
See page 5-163.
GE TYPE IAC
IAC Extremely Inverse
IAC Very Inverse
IAC Inverse
IAC Short Inverse
5 SETTINGS

5.6.1 OVERVIEW

menu (see the
5.6.2 SETTING GROUP

5.6.3 PHASE CURRENT

2
t stan-
OTHER
2
I t
FlexCurves A, B, C, and D
Recloser Curves
Definite Time
GE Multilin