Sel SEL-2664S, Manual

Page: 8 / 16

SEL- 2664S Data Sheet Schweitzer Engineering Laboratories, Inc.
8
Figure 9 AC Connections for the SEL-2664S and
SEL-700G Relays With Neutral CTs on the Secondary
Side of the Neutral Grounding Transformer
Figure 10 shows the ac connections for the SEL-2664S
with the neutral ground resistor (NGR) and CTN on the
primary side and a neutral voltage transformer.
Figure 10 AC Connections With Neutral CT on the
Primary Side and Neutral Voltage Transformer
Figure 11 shows the ac connections with NGR in the
secondary side of a wye-broken delta grounding
transformer on the generator terminals.
Figure 11 AC Connections With NGR in the Secondary
Side of a Wye-Broken Delta Grounding Transformer on the
Generator Terminals
Figure 12 shows the typical ac connections for protection
using redundant relays shown with neutral CTs on the
secondary side of the neutral grounding transformer. This
application requires Relay 1 to set the Injection Source
Mode setting, MODE_SRC := P1 and Relay 2 to set the
Injection Source Mode setting, MODE_SRC := P2.
Figure 12 AC Connections for Protection Using
Redundant Relays Shown With Neutral CTs on the
Secondary Side of the Neutral Grounding Transformer
IN
NGR
CTN 1
D02/VN
D01/NN
C02
C01
SEL-2664S
X1 X2
NGT
E11/VN
E12/NN
SEL-700G
2-C Twisted Pair. Do not
ground the CTN leads.
I_SRC
NGR
CTN
IN
D02/VN
I_SRC
D01/NN
C02
C01
SEL-2664S
X1
X2
Neutral Voltage
Transformer
2-C Twisted Pair. Do not
ground the CTN leads.
IN
NGR
NGT
CTN
D02/VN
D01/NN
C02
C01
SEL-2664S
X1 X2
2-C Twisted Pair.
Do not ground the
CTN leads.
I_SRC
IN
NGR
CTN 1
D02/VN
D01/NN
C02
C01
SEL-2664S
X1 X2
Relay 1
NGT
CTN 2
X1 X2
IN
D02/VN
D01/NN
C02
C01
SEL-2664S
Relay 2
2-C Twisted Pair. Do
not ground the CTN
leads.
I_SRC
I_SRC