Micom P631 - 3 OPERATION

3 OPERATION
3.1 Modular Structure
The P631, a numerical device, is part of the MiCOM P30 family of devices. The
device types included in this family are built from identical uniform hardware
modules. The figure below shows the basic hardware structure of the P631.
D5Z5201C
Analog bus module
Voltages Currents
Signals
Commands
Signals
Commands
Signals
Commands
Measured data
Auxiliary voltage
Signals
Commands
Signals
Commands
Communic. module
T X Y V
B
μC
μP
N P
A A A
TRIP
ALARM
OUT OF SERVICE
HEALTHY
EDIT MODE
L
Local control module
Digital bus module
Analog bus module
Analog I/O module
Analog I/O module
Processor module
Binary I/O module
Transformer module
Power supply module
PC interface
Communication
interface(s)
Protection interface
InterMiCOM
Fig. 3-1: Basic hardware structure.
External analog quantities and binary quantities – electrically isolated – are
converted to the internal processing levels by the peripheral modules T, Y, and X.
The optional binary I/O modules X are equipped with optical couplers for binary
signal input as well as output relays for the output of signals and commands or
combinations of these.
The external auxiliary voltage is applied to the power supply module V, which
supplies the auxiliary voltages that are required internally.
Analog data is transferred from the transformer module T via the analog bus
module B to the processor module P. The processor module contains all the
elements necessary for the conversion of measured analog variables, including
multiplexers and analog/digital converters. The analog data conditioned by the
analog I/O module Y is transferred to the processor module P via the digital bus
module. The optional transient ground fault module N evaluates the measured
variables according to the transient ground fault evaluation scheme.
The processor handles the processing of digitized analog variables and of binary
signals, generates the protective trip and signals, and transfers them to the
binary I/O modules X via the digital bus module. The processor module also
handles overall device communication.
P631
P631/EN M/R-11-C // P631-310-650 3-1