ABB UniGear Series, Engineering Manual

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UNIGEAR DIGITAL S ENS O RS
1VLG5 00007 E 9
Sensor accessories
Sensors are connected to protection relay via cable with RJ-45 connector. In case both
current and voltage sensors are connected to a protection relay, a coupler adapter AR5 is
used. The coupler adapter AR5 is three phases adapter. Protection relays used in UniGear
Digital have combined sensor inputs. Each current and voltage sensor has separate cable
with one RJ-45 connector. The cable is a separable part of each sensor and it can be replaced
by cable of the same length because of the guaranteed accuracy and performance of the sen-
sor. The cable is to be connected directly (or via the coupler adapter AR5 if needed) to the
protection relay. The coupler adapter AR5 is used to combine two RJ-45 connectors from
current and voltage sensors into a combined sensor input for each phase on a protection
relay.
Figure 7: Coupler adapter AR5 utilized with Relion ® 615, 620 and 640 series protection
relay