ABB REA 105 User manual

REA 105
Arc Protection Module
Operator’s Manual
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REA 105
Issued: 20.04.1998
Version: C/01.07.2002
Checked: HS
Approved: RH
We reserve the right to change data without prior notice.
Arc Protection Module
Operator’s Manual
Contents:
1. General ................................................................................................4
1.1. Features ........................................................................................4
2. Safety ...................................................................................................5
3. Block diagram .....................................................................................6
4. Description of operation ....................................................................7
4.1. Light detection ...............................................................................7
4.2. Trip output .....................................................................................7
4.3. Operation of IN1 and OUT1 ports .................................................8
4.4. Operation of port IN2 .....................................................................8
4.5. Circuit-breaker failure protection ...................................................8
4.6. Self-supervision unit (IRF) .............................................................9
4.7. Front panel ....................................................................................9
4.8. Functions of LEDs and switches .................................................10
5. Connections ......................................................................................12
6. Commissioning .................................................................................13
6.1. Instructions for commissioning: ...................................................13
6.2. Testing of arc protection system level .........................................13
6.3. Light reference setting .................................................................14
7. Dimensions and fixing .....................................................................15
8. Technical data ...........................................................................16
9. Order information ....................................................................18
10.References ..............................................................................20
1MRS 751005-MUM
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1MRS 751005-MUM
Arc Protection Module
Operator’s Manual
REA 105
1. General
REA 105 is an extension unit designed to be used together with the arc protection
relay REA 101. The function of the unit is to detect light and to carry out tripping,
if the REA 101 unit provides an overcurrent signal at the same time, or delivers a
trip command.
The use of extension units allows the protection area to be extended and the
protected object to be divided into smaller areas. Thus a more selective system is
obtained.
1.1. Features
• Loop-type or radial sensor fibre for arc detection.
• 2 high-speed semi-conductor outputs for tripping.
• Signal relay activated by light detected by the sensor fibre.
• 3 RJ-45 ports for the connection of REA 101 relay and extension units.
• Circuit-breaker failure protection. Delayed light signal to REA 101, which opens
the higher-level circuit breaker.
• Self-supervision unit monitoring operating voltages and the sensor fibre loop.
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1MRS 751005-MUM Arc Protection Module
Operator’s Manual
REA 105
5
2. Safety
National and local electrical safety regulations must always be
followed.
Dangerous voltages can occur on the connectors, even though the
auxiliary voltage is disconnected.
The frame of the device has to be carefully earthed.
Only a competent electrician is allowed to carry out the electrical
installation.
Sensor fibres have to be handled according to the instructions given by
the sensor fibre manufacturer.
Settings and configuration changes have to be done with the auxiliary
supply voltage (Uaux) disconnected. Malfunction may occur if changes
are made with the supply voltage connected.
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