Sel SEL-421-4 Manuals

Sel SEL-421-4 Manuals

Manuals and User Guides for Sel SEL-421-4. We have 2 Sel SEL-421-4 manuals available for free PDF download: Instruction Manual, Manual

Sel SEL-421-4 Instruction Manual

Sel SEL-421-4 Instruction Manual (370 pages)

Protection and Automation System

Brand: Sel | Category: Relays | Size: 9 MB

Table of Contents

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Sel SEL-421-4 Manual

Sel SEL-421-4 Manual (33 pages)

Protection, Automation, and Control System

Brand: Sel | Category: Control Systems | Size: 2 MB

Table of Contents

Functional Overview
3
Protection Features
4
Directional Elements
6
Communications-Assisted Tripping Schemes
6
Combined Current for Protection Flexibility
7
Additional Features
7
Front Panel Display
7
Circuit Breaker Operations from the Front Panel
8
Bay Control
8
One-Line Bay Diagrams
8
Rack-Type Breakers Mosaics
9
Status and Trip Target Leds
9
Alarm Points
10
Display Points
10
Advanced Display Points
10
Communications Features
11
SNTP Time Synchronization
12
MMS File Services
12
MMS Authentication
13
Open Communications Protocols
13
Flexible Control Logic and Integration Features
14
SEL OGIC Control Equations with Expanded Capabilities and Aliases
14
Oscillography and Event Reporting
16
Event Summary
16
Substation Battery Monitor for DC Quality Assurance
17
Diagrams and Dimensions
18
Models and Options
20
Specifications
22
Reporting Functions
26
Processing Specifications
26
Technical Support
30

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