GE T60 User Manual

GE Multilin T60 Transformer Protection System 5-219
5 SETTINGS 5.6 GROUPED ELEMENTS
5
c) INSTANTANEOUS DIFFERENTIAL
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  TRANSFORMER  INSTANTANEOUS DIFFERENTIAL
The instantaneous differential element acts as an instantaneous overcurrent element responding to the measured differen-
tial current magnitude (filtered fundamental frequency component) and applying a user-selectable pickup threshold. Set the
pickup threshold greater than the maximum spurious differential current that could be encountered under non-internal fault
conditions (typically magnetizing inrush current or an external fault with extremely severe CT saturation).
Figure 5–102: INSTANTANEOUS DIFFERENTIAL SCHEME LOGIC
d) HOTTEST-SPOT TEMPERATURE
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  TRANSFORMER  HOTTEST-SPOT TEMPERATURE
 INSTANTANEOUS
 DIFFERENTIAL
INST DIFFERENTIAL
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
INST DIFFERENTIAL
PICKUP: 8.000 pu
Range: 2.000 to 30.000 pu in steps of 0.001
MESSAGE
INST DIFF BLOCK:
Off
Range: FlexLogic operand
MESSAGE
INST DIFFERENTIAL
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
INST DIFFERENTIAL
EVENTS: Disabled
Range: Disabled, Enabled
 HOTTEST-SPOT
 TEMPERATURE
XFMR HST FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
XFMR HST PICKUP:
140°C
Range: 50 to 300°C in steps of 1
MESSAGE
XFMR HST DELAY:
1 min.
Range: 0 to 30000 min. in steps of 1
MESSAGE
XFMR HST BLOCK:
Off
Range: FlexLogic operand
MESSAGE
XFMR HST TARGET:
Self-Reset
Range: Self-reset, Latched, Disabled
SETTING
ACTUAL VALUE
SETTING
SETTING
FLEXLOGIC OPERAND
FLEXLOGIC OPERANDS
INST DIFFERENTIAL
FUNCTION:
DIFF PHASOR
INST DIFF BLOCK:
INST DIFFERENTIAL
PICKUP:
XFMR INST DIFF OP
XFMR INST DIFF OP C
XFMR INST DIFF OP B
XFMR INST DIFF OP A
Off=0
Enabled=1
AND
828000A2.CDR
RUN
RUN
RUN
Iad > PICKUP
Iad
Ibd
Icd
Ibd > PICKUP
Icd > PICKUP
OR

GE T60 Specifications

General

Brand	GE
Model	T60
Category	Relays
Language	English