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1MRS750527-MUM
Feeder Terminal
Technical Reference Manual, General
REF 54_
5.1.6. Analog channels
The feeder terminal measures the analog signals needed for protection, measuring,
and so on via sensors or galvanically separated matching transformers. The REF 54_
feeder terminals are provided with the following matching transformers:
• 9 matching transformers: CT1, CT2, CT3, CT4, CT5, VT1, VT2, VT3, VT4
In addition to conventional matching transformers, current sensors and voltage
dividers developed by ABB can be used in REF 54_ feeder terminals. The feeder
terminal has 9 sensor inputs
1
. A current sensor (Rogowski coil) or a voltage divider
can be connected to each sensor input. The feeder terminal allows the user to
configure each sensor input for the type of sensor to be used. Furthermore, the feeder
terminal is provided with general measurement via sensor inputs. This allows for
example temperature monitoring, provided a temperature sensor with a voltage
transducer output is available.
The third letter in the four-letter extension of the order number specifies whether the
feeder terminal is to be equipped with conventional matching transformers or with
matching transformers and sensor inputs. (
Refer to Section “Ordering Information”
on page 103).
• REF541K_115AA_A /BA_A/CA_A /AA_B/BA_B
• REF541K_118AA_A /BA_A/CA_A /AA_B/BA_B
• REF543K_127AA_A/BA_A/CA_A/AA_B/BA_B
• REF543K_129AA_A /BA_A/CA_A /AA_B/BA_B
• REF545K_133AA_A/BA_A /CA_A /AA_B/BA_B
The matching transformers and sensor inputs of the feeder terminal are designed to
allow either sensors or matching transformers to be used on the measuring channels
2...5 and 7...10. Should a matching transformer be used on a channel, no sensor is
allowed to be used on the same channel or vice versa. On channel 1 only sensors can
be used and on channel 6 only a matching transformer.
1. Feeder terminal revisions of releases prior to Release 2.0 are provided with 8 sensor
channels.
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