GE L30 User Manual

GE Multilin L30 Line Current Differential System 5-95
5 SETTINGS 5.4 SYSTEM SETUP
5
5.4.4 87L POWER SYSTEM
a) MAIN MENU
PATH: SETTINGS  SYSTEM SETUP  87L POWER SYSTEM
Any changes to the L30 power system settings change the protection system configuration. As such, the 87L pro-
tection at all L30 protection system terminals must be temporarily disabled to allow the relays to acknowledge the
new settings.
• NUMBER OF TERMINALS: This setting is the number of the terminals of the associated protected line.
• NUMBER OF CHANNELS: This setting should correspond to the type of communications module installed. If the relay
is applied on two terminal lines with a single communications channel, this setting should be selected as "1". For a two
terminal line with a second redundant channel for increased dependability, or for three terminal line applications, this
setting should be selected as "2".
• CHARGING CURRENT COMPENSATION: This setting enables and disables the charging current calculations and
corrections of current phasors. The voltage signals used for charging current compensation are taken from the source
assigned with the
CURRENT DIFF SIGNAL SOURCE 1 setting. As such, it's critical to ensure that three-phase line voltage is
assigned to this source. The following diagram shows possible configurations.
 87L POWER SYSTEM

NUMBER OF TERMINALS:
2
Range: 2, 3
MESSAGE
NUMBER OF CHANNELS:
1
Range: 1, 2
MESSAGE
CHARGING CURRENT
COMPENSATN: Disabled
Range: Disabled, Enabled
MESSAGE
POS SEQ CAPACITIVE
REACTANCE: 0.100 kΩ
Range: 0.100 to 65.535 k Ω in steps of 0.001
MESSAGE
ZERO SEQ CAPACITIVE
REACTANCE: 0.100 kΩ
Range: 0.100 to 65.535 k Ω in steps of 0.001
MESSAGE
ZERO SEQ CURRENT
REMOVAL: Disabled
Range: Disabled, Enabled
MESSAGE
LOCAL RELAY ID
NUMBER: 0
Range: 0 to 255 in steps of 1
MESSAGE
TERMINAL 1 RELAY ID
NUMBER: 0
Range: 0 to 255 in steps of 1
MESSAGE
TERMINAL 2 RELAY ID
NUMBER: 0
Range: 0 to 255 in steps of 1
MESSAGE
CHNL ASYM COMP:
Off
Range: FlexLogic operand
MESSAGE
BLOCK GPS TIME REF:
Off
Range: FlexLogic operand
MESSAGE
MAX CHNL ASYMMETRY:
1.5 ms
Range: 0.0 to 10.0 ms in steps of 0.1
MESSAGE
ROUND TRIP TIME
CHANGE: 1.5 ms
Range: 0.0 to 10.0 ms in steps of 0.1
MESSAGE
LOCAL GPS TROUBLE:
Range:
MESSAGE
 IN-ZONE
 TRANSFORMER
See page 5-100.
NOTE

GE L30 Specifications

General

Brand	GE
Model	L30
Category	Relays
Language	English