ABB REG670 - Page 192

en06000498.vsd
REG 670
RXTTE 4
I
U
230 V AC
120 V AC
0
Generator rotor winding
G
313
314
315
421
428
324
325
221 222
Optional
external resistor
Connection to be done
by the panel builder
IEC06000498 V1 EN-US
Figure 53: Ten times amplification of current via a current transformer
The test described in steps 1 to 6 can be done with the generator at stand-still
situations.
Procedure
1. The test should be prepared with a switch connected between the output of
RXTTE4 (221) and the station earth. Initially this switch is open.
2. First the 120 (230) V input to RXTTE4 is disconnected. This should give a signal
from REG670 that the injection voltage is low.
3. Reconnect the 120 (230) V input and check that the low injection voltage signal
resets.
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
186 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual