ABB RET670 Product Manual page 5

ABB
Transformer protection RET670 ANSI
Pre-configured
Product version: 1.2
TRIP BKR1
94
TRIP BKR3
94
ANSI10000087 V2 EN
Figure 1. A typical protection application for a two winding transformer in single breaker arrangements is shown on
the figure. The system grounding principle and connection group will vary which gives different detailed
arrangements for each application.
RET 670
51N
50BF
49
51P
51G
87N
87T
87N
51G
51P/67P
50BF
51N/67N
59P
27P
60F
24
1MRK 504 118-BUS A
CT1
BKR
1
WDG1
CT6
CT7
WDG2
BKR
3
CT3
VT's from WDG 2 side of
XFRM
59N
ANSI10000087-2-en.vsd
5