Clear Relay Records - GE D30 Instruction Manual
Line distance protection system, ur series
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Also See for D30:
- Instruction manual (686 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (636 pages)
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5 SETTINGS
components. The cut-off operation applies to quantities used for metering, protection, and control, as well as those
used by communications protocols. Raw samples of the voltages available via oscillography are not subject cut-off.
The
CURRENT CUT-OFF LEVEL
power cut-off level is calculated as shown below. For Delta connections:
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
3-phase power cut-off
=
For Wye connections:
3
3-phase power cut-off
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
=
per-phase power cut-off
where VT primary = VT secondary × VT ratio and CT primary = CT secondary × CT ratio.
For example, given the following settings:
: "0.02 pu"
CURRENT CUT-OFF LEVEL
: "1.0 V"
VOLTAGE CUT-OFF LEVEL
: "100 A"
PHASE CT PRIMARY
: "66.4 V"
PHASE VT SECONDARY
: "208.00 : 1"
PHASE VT RATIO
: "Delta".
PHASE VT CONNECTION
We have:
CT primary = "100 A", and
VT primary =
PHASE VT SECONDARY
The power cut-off is therefore:
power cut-off = (
CURRENT CUT-OFF LEVEL
× 0.02 pu × 1.0 V × 100 A × 13811.2 V) / 66.4 V
= (
3
= 720.5 watts
Any calculated power value below this cut-off will not be displayed.
Lower the VOLTAGE CUT-OFF LEVEL and CURRENT CUT-OFF LEVEL with care as the relay accepts lower sig-
nals as valid measurements. Unless dictated otherwise by a specific application, the default settings of "0.02 pu" for
NOTE
CURRENT CUT-OFF LEVEL and "1.0 V" for VOLTAGE CUT-OFF LEVEL are recommended.
PATH: SETTINGS
PRODUCT SETUP
CLEAR RELAY
RECORDS
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
GE Multilin
and the
VOLTAGE CUT-OFF LEVEL
×
3
CURRENT CUT-OFF LEVEL
×
×
CURRENT CUT-OFF LEVEL
×
CURRENT CUT-OFF LEVEL
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
=
x
PHASE VT RATIO
×
VOLTAGE CUT-OFF LEVEL
CLEAR RELAY RECORDS
CLEAR FAULT REPORTS:
Off
CLEAR EVENT RECORDS:
Off
CLEAR OSCILLOGRAPHY?
No
CLEAR ARC AMPS 1:
Off
CLEAR ARC AMPS 2:
Off
RESET UNAUTH ACCESS:
Off
D30 Line Distance Protection System
are used to determine the metered power cut-off levels. The
×
×
VT primary
VOLTAGE CUT-OFF LEVEL
VT secondary
×
VT primary
VOLTAGE CUT-OFF LEVEL
VT secondary
×
VT primary
VOLTAGE CUT-OFF LEVEL
VT secondary
= 66.4 V x 208 = 13811.2 V
× CT primary × VT primary)/VT secondary
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
5.2 PRODUCT SETUP
×
CT primary
(EQ 5.3)
×
CT primary
(EQ 5.4)
×
CT primary
(EQ 5.5)
5.2.3 CLEAR RELAY RECORDS
5
5-25
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