ABB RELION 620 Series Technical Manual page 721

1MAC504801-IB E
9.2.4
9.2.4.1
620 series ANSI
Technical Manual
Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are "Enable" and "Disable".
The reclosing operation can be enabled and disabled with the Reclosing operation setting.
This setting does not disable the function, only the reclosing functionality. The setting has
three parameter values: "Enable", "External Ctl" and "Disable". When the setting value
"External Ctl" is selected, the reclosing operation is controlled with the RECL_ON input.
The operation of the autoreclosing function can be described by using a module diagram.
All the modules in the diagram are explained in the next sections.
A070864 V2 EN
Figure 360: Functional module diagram
Signal collection and delay logic
When the protection trips, the initiation of autoreclosing shots is in most applications
executed with the INIT_1...6 inputs. The DEL_INIT2...4 inputs are not used. In
some situations, pickup of the protection stage is also used for the shot initiation. This is
the only time when the DEL_INIT inputs are used.
Section 9
Control functions
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