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General description
The RD2 differential relay, combined with an external toroidal
transformer, protects line cables against earth directed faults. The
appliance can be powered both on AC (from 110V to 400V9 or on
DC (from 48V to 110V) via the same pair of terminals. Minidip
switches are provided to select sensitivity and tripping time.
An exchange contact (NO-NC) is provided for output.
Installation instructions
1°
2°
DIN EN 50022 (35 mm
)
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If an earth directed leak current occurs (differential current), the
toroidal transformer supplies a signal to the RD2 differential relay,
which processes it and compares it with the set sensitivity value.
When this threshold level is exceeded, the set delay is enabled and
then the alarm contact is tripped.
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