GE D30 Instruction Manual page 120

5.2 PRODUCT SETUP
The
SERVER SCANNING
61850 has two modes of functionality: GOOSE/GSSE inter-device communication and client/server communication. If the
GOOSE/GSSE functionality is required without the IEC 61850 client server feature, then server scanning can be disabled
to increase CPU resources. When server scanning is disabled, there will be not updated to the IEC 61850 logical node sta-
tus values in the D30. Clients will still be able to connect to the server (D30 relay), but most data values will not be updated.
This setting does not affect GOOSE/GSSE operation.
Changes to the
5
NOTE
The
CLEAR XCBR1(2) OpCnt
the XCBR operating counter status attribute (OpCnt) increments with every operation. Frequent breaker operation may
result in very large OpCnt values over time. This setting allows the OpCnt to be reset to "0" for XCBR1 and XCBR2.
The main menu for the IEC 61850 logical node name prefixes is shown below.
PATH: SETTINGS PRODUCT SETUP
IEC 61850 LOGICAL
NODE NAME PREFIXES
The IEC 61850 logical node name prefix settings are used to create name prefixes to uniquely identify each logical node.
For example, the logical node "PTOC1" may have the name prefix "abc". The full logical node name will then be
"abcMMXU1". Valid characters for the logical node name prefixes are upper and lowercase letters, numbers, and the
underscore (_) character, and the first character in the prefix must be a letter. This conforms to the IEC 61850 standard.
Changes to the logical node prefixes will not take effect until the D30 is restarted.
The main menu for the IEC 61850 MMXU deadbands is shown below.
PATH: SETTINGS PRODUCT SETUP
MMXU DEADBANDS
The MMXU deadband settings represent the deadband values used to determine when the update the MMXU "mag" and
"cVal" values from the associated "instmag" and "instcVal" values. The "mag" and "cVal" values are used for the IEC 61850
buffered and unbuffered reports. These settings correspond to the associated "db" data items in the CF functional con-
straint of the MMXU logical node, as per the IEC 61850 standard. According to IEC 61850-7-3, the db value "shall repre-
sent the percentage of difference between the maximum and minimum in units of 0.001%". Thus, it is important to know the
maximum value for each MMXU measured quantity, since this represents the 100.00% value for the deadband.
The minimum value for all quantities is 0; the maximum values are as follows:
phase current: 46 × phase CT primary setting
•
• neutral current: 46 × ground CT primary setting
• voltage: 275 × VT ratio setting
5-22
feature should be set to "Disabled" when IEC 61850 client/server functionality is not required. IEC
setting, setting, and GOOSE dataset will not take effect until the D30 is restarted.
IED NAME LD INST
settings represent the breaker operating counters. As breakers operate by opening and closing,
COMMUNICATIONS
PIOC LOGICAL NODE
NAME PREFIXES
PTOC LOGICAL NODE
MESSAGE
NAME PREFIXES
PTRC LOGICAL NODE
MESSAGE
NAME PREFIXES
COMMUNICATIONS
MMXU1 DEADBANDS
MMXU2 DEADBANDS
MESSAGE
MMXU3 DEADBANDS
MESSAGE
MMXU4 DEADBANDS
MESSAGE
D30 Line Distance Relay
IEC 61850... IEC 61850 LOGICAL NODE NAME PREFIXES
↓
IEC 61850 PROTOCOL
5 SETTINGS
MMXU DEADBANDS
GE Multilin