ABB RELION 670 Series Technical Manual page 1372

Section 23
Injection equipment hardware
Measuring point +
Ground (measuring)
Injection
Ground (injection)
Measuring point -
IEC11000040 V1 EN-US
Figure 696: REX062 principle design
23.4 Shunt resistor unit REX062
23.4.1 Introduction
REX062 is typically used when injection is done via a grounding transformer.
23.4.2 Design
REX062 for stator protection is used when either injection via a grounding transformer (i.e. not via
a VT) is used or when maximum voltage posed on injection equipment by the generator is bigger
than 120V.
Injection A
Injection B
PE
IEC11000041 V1 EN-US
Figure 697: REX062 Principal design
1366
REX061
Coupling Capacitor unit
IEC11000040-3-en.vsd
REX062
Shunt Resistor unit
External A
Fuse
External B
I sense A
I sense B
IEC11000041-2-en.vsd
Rotor +
Rotor -
PE
GUID-90D6AF74-D9AC-49B8-B2CA-8A94E58ADEA5 v1
GUID-D73D2D02-F06B-4284-95F3-FFC6D223E3DE v2
1MRK 502 066-UUS B
Technical manual