ABB Relion 670 series - Page 1368

23.1.2 Injection unit REX060 from rear side
23.1.2.1 Injection unit REX060
GUID-9987BF42-9133-4606-9ABB-0C918EBE8AE3 v1
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BackPlane
Front-plate
Back view Front view
Power
connector
IED and
Injection
connectors
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Top view
HMI and Logic
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X81
Injection switch
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X62 X82
IEC11000018-1-en.vsd
IEC11000018 V1 EN-US
Figure 694: Rear and top view of injection unit REX060
23.2 Injection unit REX060
23.2.1 Introduction
GUID-59174783-57D0-4F39-AE7F-B59FA88CB230 v1
The injection unit REX060 is used to inject voltage and current signals to the generator or motor
stator and rotor circuits. REX060 generates two square wave signals with different frequencies for
injection into the stator and rotor circuits respectively. The response from the injected voltage
and currents are then measured by the REX060 unit and amplified to a level suitable for the analog
voltage inputs of IED.
23.2.2 Design
GUID-EC628DB7-CEF0-4700-9F8E-27B9934549EA v2
REX060 consists of a standard enclosure (6U, 1/2 x 19"). In this enclosure, the modules for stator
(SIM) and/or rotor (RIM) earth fault protection are installed. The stator injection transformer and
the power supply are also installed inside the enclosure.
On the front of the enclosure there is a backlit LCD, control buttons and a key switch.
In figure
695 below the content of display is shown for a REX060 with one SIM and one RIM
module. Row 1 contains mains frequency information. Row 2-3 contains stator information and
row 4-5 rotor. Column 1 (empty) gives status, column 2 and 3 are informative and column 4
contains variables, settable by the keypad.
Section 23 1MRK 502 066-UUS B
Injection equipment hardware
1362
Technical manual