GE 745 TRANSFORMER MANAGEMENT RELAY User Manual

5-70 745 Transformer Management Relay GE Power Management
5.6 S4 ELEMENTS 5 SETPOINTS
5
5.6.13 HARMONICS
This section contains the settings to configure the total harmonic distortion monitoring elements. Included are a
THD level element for each winding and each phase.
a) WINDING 1 (2/3) THD LEVEL
y HARMONICS
y
[ENTER] for more
This message indicates the start of the
THD LEVEL
section. To continue these
setpoints press or press for the next section.
y W1 THD LEVEL
y
[ENTER] for more
This message indicates the start of the
W1 (2/3) THD
level section. To
continue these setpoints press or press for the next section.
W1 THD LEVEL
FUNCTION: Disabled
Range: Disabled / Enabled
W1 THD LEVEL
TARGET: Self-reset
Range: Self-reset / Latched / None
Select
None
to inhibit the display of the target message when the element
operates. Thus an element whose “target type” is
None
never disables the
LED self-test feature since it cannot generate a displayable target message.
MINIMUM OPERATING
CURRENT: 0.10 x CT
Range: 0.03 to 1.00 (steps of 0.01)
Enter the minimum value of current (in units of relay nominal current)
required to allow the THD level element to operate.
W1 THD LEVEL
PICKUP: 50.0%
ƒο
Range: 0.1 to 50.0 (steps of 0.1)
Enter the total harmonic distortion (in %ƒ
0
) above which the
W1 (2/3) THD
level will pickup and start the delay timer.
W1 THD LEVEL
DELAY: 10 s
Range: 0 to 60000 (steps of 1)
Enter the time that the total harmonic distortion must remain above the
pickup level before the element operates.
W1 THD LEVEL
BLOCK: Disabled
Range: Disabled / Logc Inpt 1 (2-16) /Virt Inpt 1 (2-16) / Output Rly 1 (2-8) /
SelfTest Rly / Virt Outpt 1 (2-5)
ENTER
MESSAGE
ENTER
MESSAGE

GE 745 TRANSFORMER MANAGEMENT RELAY Specifications

General

Brand	GE
Model	745 TRANSFORMER MANAGEMENT RELAY
Category	Relays
Language	English