User`s guide

Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com V3-T9-223
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9.4
Metering Devices, Protective Relays, Software and Connectivity
Protective Relays
Wiring Diagrams
Protected Area Principle—Fault “A” Outside = No Alarm, Fault “B” Inside = Alarm
DP-300
A)
B)
Schematic Circuit Diagrams (Single-Phase Version):
A) Fault Outside the Protection Area
B) Fault Inside the Protection Area
I
a
or or
I
b
I
L
I
a
or or
I
b
I
L
DP-300
Block Differential Protection
Possible Protected Objects:
M
G
N
PE
L (90 to 250 Vac/dc)
Current IL1 Transducer Set 2
Current IL2 Transducer Set 2
Current IL3 Transducer Set 2
Current IL3 Transducer Set 1
Current IL2 Transducer Set 1
Current IL1 Transducer Set 1
Relay 1
Relay 2
Relay 3
Ready for Operation
N/C
Relay 4
Common
N/C
Conguration Off
Acknowledgement
Blocking
Subject to Technical Modications.
L1 L2
L3
Transducer Set 1 (High Voltage Side)
Protected Object
Transducer Set 2 (Low Voltage Side)
The Transducer Ratio is
Adjustable in the Display.
The Transducer Ratio is
Adjustable in the Display.
25 26 27 28 29 30
35 36 33 34 31 32
DP-300 — Current Differential Protection Relay
1 2 3 4 5 6 7 8 9 10 11 12
15 16 17 18 19
83 81 79