1.3
Date Code 20020903
SEL-587Z Instruction Manual
Introduction and Specifications
Overview
shows the relay hardware arrangement. A
single microprocessor, data acquisition system, and power supply perform the
functions required to provide high-impedance differential and overcurrent
protection.
Figure 1.2
SEL-587Z Hardware Block Diagram.
LPF
87A
87B
LPF
87C
LPF
IC
IB
IA
LPF
LPF
LPF
A/D
Power
Supply
ALARM
OUT4
OUT3
IN2
Front Panel
Low-Level
Test Interface
Port
EIA-232/EIA-485*
OUT2
IN1
OUT1
Port
EIA-232
Real-Time
Clock
M
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C
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M
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x
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*Ordering option
Summary of Contents for SEL-587Z
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