Allen-Bradley Rockwell Automation 857 User Manual page 15

Table 1.1 – List of Protection Functions (cont.)
IEEE/
IEC symbol
ANSI code
81L f<, f<<
df/dt
81R
25 ∆f, ∆U, ∆φ
50BF CBFP
99 Prg1...8
50ARC/ ArcI>, ArcI
01
ArcI >
50NARC
02
400kV/200 kV
transmission
110 kV network
network
Transmission
substations
Power
plants
Circuit
breaker
20 kV cable
Secondary
network
substation
(distribution
230/400V
transformer)
Figure 1.1 – Application of the Feeder and Motor Protection Device
Further the relay includes a disturbance recorder. Arc protection is
optionally available.
The relay communicates with other systems using common
protocols, such as the DeviceNet, Modbus RTU, Modbus TCP,
Ethernet, Profibus DP, IEC 60870-5-103, IEC 60870-5-101, IEC
61850, SPA bus and DNP 3.0.
Function name
Underfrequency protection
Rate of change of frequency
(ROCOF) protection
Synchrocheck
Circuit-breaker failure protection
Programmable stages
>, Optional arc fault protection
Remote Control Interface
Protection
relay
Protection
relay
1-3
Introduction
Note
Remote control
Distribution
substation
I/O
20 kV overhead line
Distribution transformer
230/400V
VAMP255 S ll k
857-UM001A-EN-P – July 2009