GE T60 User Manual

5-220 T60 Transformer Protection System GE Multilin
5.6 GROUPED ELEMENTS 5 SETTINGS
5
The Hottest-Spot Temperature element provides a mechanism for detecting abnormal winding hottest-spot temperatures
inside the transformer. It can be set to alarm or trip in cases where the computed hottest-spot temperature is above the
pickup threshold for a user-specified time (considered as transformer overheating).
• XFMR HST PICKUP: Enter the hottest-spot temperature required for operation of the element. This setting should be
based on the maximum permissible hottest-spot temperature under emergency transformer loading conditions and
maximum ambient temperature.
• XFMR HST DELAY: Enter an appropriate time delay before operation of the element.
Figure 5–103: TRANSFORMER HOTTEST-SPOT TEMPERATURE LOGIC
e) AGING FACTOR
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  TRANSFORMER  AGING FACTOR
The Aging Factor element detects transformer aging in per-unit normal insulation aging. The element can be set for alarm
or trip whenever the computed aging factor is greater than the user-defined pickup setting for the specified time delay.
• AGING FACTOR PICKUP: Enter a value above which the aging factor element will operate. Enter a setting greater
than the maximum permissible aging factor under emergency loading conditions and maximum ambient temperature.
 AGING FACTOR

AGING FACTOR
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
AGING FACTOR PICKUP:
2.0 pu
Range: 1.1 to 10.0 pu in steps of 0.1
MESSAGE
AGING FACTOR
DELAY: 10 min.
Range: 0 to 30000 min. in steps of 1
MESSAGE
AGING FACTOR BLOCK:
Off
Range: FlexLogic operand
MESSAGE
AGING FACTOR TARGET:
Self-Reset
Range: Self-reset, Latched, Disabled
SETTING
SETTING
ACTUAL VALUE
SETTINGS
FLEXLOGIC OPERANDS
HOTTEST-SPOT t°
FUNCTION:
HOTTEST-SPOT t°
BLOCK:
HOTTEST-SPOT t° XFMR HST-SPOT t°C OP
XFMR HST-SPOT t°C DPO
XFMR HST-SPOT t°C PKP
Enable=1
Off=0
HOTTEST-SPOT t°
PICKUP:
HOTTEST-SPOT t°
PICKUP TIME DELAY:
RUN
t°C > PKP
t
PKP
828731A4.cdr
AND

GE T60 Specifications

General

Brand	GE
Model	T60
Category	Relays
Language	English