Implementations; 1.Basic Angle Control By Digital Input - ABB REX 521 Technical Reference Manual, Standard Configurations

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Technical Reference Manual, Standard Configurations
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Implementations

In the section below a few implementation examples for the standard configuration
M01 are presented.
Basic angle control by digital input
If an external control signal determined from the earthing situation of the network is
available, it can be used for changing the settings for the basic angle of the
directional earth-fault protection. The angle can be switched in between 0° and –90°.
The usage of basic angle control is useful as compensated network is normally set
to 0° and an isolated network is set to -90°.
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REX 521
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CLOSE circuit breaker
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