GE Multilin G650, Manual

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GEK-113285A G650 Generator Protection & Control System 5-29
5 SETTINGS 5.4 PROTECTION ELEMENTS
5
Function:
Possible values are: [DISABLED – ENABLED]
When this setting is disabled, the relay is working in single setting group mode, with all the available protection elements
working at the same time. If this function is enabled, the setting groups will be enabled, and only the setting group indicated
by the Active Group setting will be active.
Active group:
Possible values are 1, 2 or 3.
The setting group selected by default is setting Group 1. This setting indicates which setting group is active (for this
purpose, the previous setting must be set as ENABLED)
The Relay incorporates several signals associated to the Protection elements grouping in tables. First, signals that indicate
the group activation:
GROUP 1 ACT ON This signal produces the activation of setting group 1
GROUP 2 ACT ON This signal produces the activation of setting group 2
GROUP 3 ACT ON This signal produces the activation of setting group 3
These activation signals for the different setting groups are configured using EnerVista 650 Setup at
Setpoint > Relay
Configuration > Protection Elements
as shown in the figure.
Figure 5–3: TABLE CHANGE SIGNALS CONFIGURATION EXAMPLE
The example above uses three digital inputs to perform the table selection, but it is possible to use any other logic signal in
the relay.
In case of using digital inputs, the user can select the setting table activating these digital inputs (which could come from the
PLC, or from a different relay, or from an auxiliary switch, for adaptive protection). This selection of the active group has
priority over the setting. If several signals are active at the same time, the highest one will be taken as valid. For example, if
selection signals for both groups 1 and 2 are active, the active table will be number 2.
The time used in the table change is one PLC logic scan cycle (5 ms typical), allowing a fast adaptation to system changes.
Another type of signals are block signals. These are internal relay signals that indicate which groups are active, and which
are blocked. For example, if the setting group function is enabled and setting group 1 has been set as active, block signals
from setting groups 2 and 3 will be active, and the block signal that corresponds to group 1 will be inactive because that
group is enabled.
Block signals are as follows:
GROUP 1 BLOCKED
GROUP 2 BLOCKED
GROUP 3 BLOCKED
All signals corresponding to setting Groups, both the activation and the block signals, are located in the
Actual > Status >
Control Elements > setting Groups
menu
.