Rockwell Automation 865 Differential Protection Relay - Manual (Page 10)

1-2 Overview
865-UM001A-EN-P – July 2009
•
Freely configurable interlocking schemes with basic logic
functions
•
Recording of events and fault values into an event register from
which the data can be read via a keypad and a local HMI or by
means of a PC based SetPointPS user interface
•
Latest events and indications are in non-volatile memory.
•
Easy configuration, parameter setting and reading of information
via local HMI, or with the SetPointPS programming software
•
Easy connection to power plant automation system due to a
versatile serial connection and several available communication
protocols
•
Built-in, self-regulating ac/dc converter for auxiliary power
supply from any source within the range from 40 to 865 V dc or
ac. The alternative power supply is for 18 to 36 V dc
•
Built-in disturbance recorder for evaluating all the analogue and
digital signals
•
Eight (8) programmable stages for alarming or protection
purposes
The Allen-Bradley 865 differential protection relay is ideal for
transformer, motor, generator and short cable (100) differential
protection. The relay features the following protection functions.
Table 1-1 – List of Protection Functions
IEEE/
ANSI code
IEC symbol Function name
50/51 3I>, 3I>>, 3I’>, 3I’>> Overcurrent protection
87 ∆I>, ∆I>> Differential overcurrent protection
46 I 2 >, I’ 2 > Current unbalance protection
49 T> Thermal overload protection
50N/51N
I 0 >,
I 0 >>,
I 0 >>>,
I 0 >>>>
Earth fault protection
50BF CBFP Circuit-breaker failure protection
99 Prg1...8 Programmable stages
50ARC
50NARC
ArcI>, ArcI’>
ArcI 01 >, ArcI 02 >
Optional arc fault protection
Further the relay includes a disturbance recorder. Arc protection
is optionally available.
The relay communicates with other systems using common
protocols, such as the Modbus RTU, ModbusTCP, Profibus DP,
Ethernet, DeviceNet, IEC 60870-5-103, SPA bus and DNP 3.0,
IEC 61850 and IEC 60870-5-101.
Main Features (cont.)