Basler BE1-CDS220, Instruction Manual

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12-12 Installation BE1-CDS220
POWER SYSTEM APPLICATIONS
Figures 12-16 through 12-27 are examples of the applications that can be served by the Basler Electric
BE1-CDS220 Current Differential System. Many of these applications can be used in concert with other
Basler numeric systems such as the BE1-851and BE1-951 Overcurrent Protection System, the BE1-
CDS220 Current Differential System, or the BE1-GPS100 Generator Protection System.
Transformer
P0001-02
09-21-00
B7
B8
B5
B6
B3
B4
B1
B2 B9
H1 H2 H3
X1 X2 X3
AØ
BØ
CØ
Circuit
Switcher
Low Side Breaker
52
AØ BØ CØ
Optional
With the appropriate transformer and CT connection information, the relay can automatically determine the required
compensation. The relay can accommodate any combination of transformer and CT connection (wye, delta AB, or
Delta AC). For more information, refer to Section 3, Input And Output Functions, Input Current.
Optional independent ground input (
I
G
) can be connected for overcurrent or neutral differential protection. For more
information on connection details, see the following figures on optional ground inputs.
Phase, Residual, and
I
2
overcurrent elements can be connected to either CT circuit for backup protectiion. For more
information on applying overcurrent backup, refer to Section 8, Application.
Overcurrent neutral ground (
I
N
) operates on internally calculated residual (3I0) current.
For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection System with the
BE1-CDS220 (see the following figure for a connection diagram). To add only metering to the BE1-CDS220, connect
a BE1-MMS100.
1
2
3
4
5
1
3
2
1
3
4
B14
B10
B12
B13
B11
I
G
I
C1
I
B1
I
A1
I
C2
I
B2
I
A2
BE1-CDS220
Figure 12-16. Typical Transformer Differential Connection