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Schweitzer Engineering Laboratories SEL-421-4 User Manual

Schweitzer Engineering Laboratories SEL-421-4
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SEL-421 RelayInstruction Manual
*PM421-04-NB*
SEL-421-4, -5
Protection, Automation,
and Control System
Instruction Manual
20171021

Table of Contents

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Schweitzer Engineering Laboratories SEL-421-4 Specifications

General IconGeneral
Current Input Range0-5 A
Frequency Range50/60 Hz
TypeDistance Relay
ApplicationsTransmission lines
Communication PortsEthernet, Serial
ProtocolsIEC 61850, DNP3, Modbus
Power Supply100-240 VAC
Operating Temperature-40°C to +85°C
MeteringVoltage, Current, Power, Energy
AutomationProgrammable logic
Breaker ControlYes
Protection FunctionsDistance, Overcurrent, Voltage, Frequency
Time SynchronizationIEEE 1588 PTP, NTP

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