ABB REF 54 Series Technical Reference Manual

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Technical Reference Manual, General
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REF 541: PS1_4_ACFail
REF 543: PS1_4_ACFail
REF 545: PS2_4_ACFail
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The REF 54_ feeder terminal includes an internal temperature supervision function.
The power supply module issues an internal alarm signal when overtemperature has
been detected inside the terminal enclosure. The alarm signal will be activated once
the temperature inside the terminal enclosure increases to +78
o
C (+75...+83
o
C).
Overtemperature indication is available in the feeder terminal configuration and can
be connected to any signal output of the terminal. The overtemperature indication
input in the feeder terminal configuration is as follows:
REF 541: PS1_4_TempAlarm
REF 543: PS1_4_TempAlarm
REF 545: PS2_4_TempAlarm
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The feeder terminal measures the analogue signals needed for protection,
measuring, etc. 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 e.g.
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 88).
• REF541D_115AA_A /BA_A/CA_A /AA_B/BA_B
• REF541B_118AA_A /BA_A/CA_A /AA_B/BA_B
• REF543G_127AA_A/BA_A/CA_A/AA_B/BA_B
• REF543B_129AA_A /BA_A/CA_A /AA_B/BA_B
• REF545D_133AA_A/BA_A /CA_A /AA_B/BA_B
1. Feeder terminal revisions of releases prior to the Release 2.0 are provided with 8
sensor channels.

ABB REF 54 Series Specifications

General

Brand	ABB
Model	REF 54 Series
Category	Touch terminals
Language	English