ABB RELION 615 SERIES Product Manual page 8

Voltage Protection and Control
REU615
Product version: 5.0 FP1
can be used for load-side voltage regulation. For substations
with two or more power transformers operating in parallel, three
alternative voltage regulation principles are available, that is,
3I
Io
Loadshedding group #1
REF615 REF615
Std. conf. N Std. conf.
ANSI IEC ANSI
49F 3Ith>F 49F
50L/50NL ARC 50L/50NL
50P/51P 3I>>> 50P/51P
51BF/51NBF 3I>/Io>BF 51BF/51NBF
51P/51N 3I/Io 51P/51N
67NIEF Io>IEF→ 67NIEF
GUID-CA7B4D3E-1269-450F-A061-5A404FF52455 V3 EN
Figure 3. Busbar protection and supervision using REU615 with the standard configuration A
Busbar protection and supervision using REU615 with the
standard configuration A is illustrated in
protection schemes of REU615 and REF615 are employed for
the busbar protection of the voltage measurement bay and
related parts of the busbar. Apart from the busbar protection
and supervision, REU615 is utilized for centralized load-
8
3I
Io
Loadshedding group #2
Loadshedding group #3
REF615
N Std. conf.
IEC ANSI
3Ith>F 49F
ARC 50L/50NL
3I>>> 50P/51P
3I>/Io>BF 51BF/51NBF
3I/Io 51P/51N
Io>IEF→ 67NIEF
Figure 3. The arc
the master/follower principle, the negative reactance principle
(NRP) and the minimizing circulating current (MCC) principle.
REF615
Std. conf.
Io
ANSI IEC
25 SYNC
3U
47O-/59 U2>/3U>
Uo
47U+/27 U1</3U<
50L/50NL ARC
3I
50P/51P 3I>>>
51BF/51NBF 3I>/Io>BF
67/67N 3I→/Io→
3I 3I
Io Io
REF615
N Std. conf.
IEC ANSI IEC
3Ith>F 49F 3Ith>F
ARC 50L/50NL ARC
3I>>> 50P/51P 3I>>>
3I>/Io>BF 51BF/51NBF 3I>/Io>BF
3I/Io 51P/51N 3I/Io
Io>IEF→ 67NIEF Io>IEF→
shedding (disconnection) and restoration (reconnection) of one
of the outgoing feeders. The synchrocheck and energizing
check functions incorporated in REU615 are employed for
ensuring a safe connection of the outgoing feeder, including
distributed generation, to the network.
N
3U Uo
REU615
N Std. conf. A
ANSI IEC
25 SYNC
47O-/59 U2>/3U>
47U+/27 U1</3U<
50L/50NL 4) ARC 4)
59G Uo>
81 f</f>, df/dt
81LSH UFLS/R
4) Light detection only
1MRS757058 K
3I
3U
Io
REF615
Std. conf. N
ANSI IEC
47O-/59 U2>/3U>
47U+/27 U1</3U<
49F 3Ith>F
50L/50NL ARC
50P/51P 3I>>>
51BF/51NBF 3I>/Io>BF
51P/51N 3I/Io
59G Uo>
67NIEF Io>IEF→
ABB