GE B90 Instruction Manual page 278

PRODUCT SETUP
• Energy (real or imaginary) — 4 × phase CT primary setting × 1.5 × VT Secondary setting × VT ratio setting x 1 hour
• Frequency — 90 Hz
• Frequency rate of change — 90 Hz/s
• Power factor — 2
• Angle — 360 degrees
Select the deadband settings from knowledge of the characteristics of the power system quantity measured and
knowledge of the demands of the applications receiving the measurement via GOOSE or report such that changes of
significance to the application are promptly reported, yet the network is not overly burdened with event messages.
After making changes to settings that affect the per unit bases, such as CT PRIMARY, CT SECONDARY, VT
SECONDARY, VT RATIO, and VT CONNECTION settings, cycle power to the relay to force recalculation of the IEC
61850 deadband interval in primary units. Until the relay restarts, for some quantities, the deadband interval in
primary units calculated for the previous settings remains in effect.
Signal sources
Deadband parameters of measured values related to the signal sources are configured here.
Setting Groups
The UR implements a setting groups element as detailed in the Control Elements > Setting Groups section of this chapter.
The active setting group and the setting group open for edits can be selected via MMS commands SelectActiveSG and
SelectEditSG. The setting related to these IEC 61850 commands are described here.
Navigate to Settings > Product Setup > Communications > IEC 61850 > Control Elements > Setting Groups to access
5
the setting that configures the IEC 61850 setting group commands.
Initial Setting Group
Range: 1 to 6 in steps of 1
Default: 1
The entered value sets the initial value of the non-volatile register normally controlled by the service SelectActiveSG. This
initialization occurs only on the UR reboot immediately following the receipt of a valid CID file.
This setting is not mapped into the IEC 61850 information model, but sets the value of SettingControl element attribute
actSG in SCL files.
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Figure 5-39: Setting Groups panel
B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS