Sepam™ Substation Applications

Sepam Substation / Feeder Applications

S24/S42

S84

Substation/Feeder protection is broken into three sections Basic, Standard, and Advanced. The Basic protection is covered with our Sepam S24 protection relay and handles overcurrent (50/51) and ground faults (50G/51G or 50N/51N). The Standard protection is covered with the Sepam S42 protection relay and covers a host of current, voltage, and frequency protection elements. The Advanced protection is covered with the Sepam S84 and covers current, voltage, frequency, and synchro check protection functions.

Basic Protection Relay S24

Typical Catalog Number: SQ1S24A1B1A0A0 Series 20 Substation/Feeder Protection S24 (24-250Vdc & 120-240Vac), 1/5A CT inputs, 10In/8Out (110-125 Vdc, 110Vac), RS485

Standard Protection Relay S42

Typical Catalog Number: SQ1S42A1B1A0A0 Series 40 - Substation/Feeder Protection S42 (24-250Vdc & 120-240Vac), 1/5A CT inputs, 10In/8Out (110-125 Vdc, 110Vac), RS485

Advanced Protection Relay S84

Typical Catalog Number: SQ1S84P1J5A0B0 Series 80 - Substation/Feeder Protection S84 (24-250Vdc), mimicBus Graphical Display, 1/5A CT inputs, 14In/11Out Digital Module (110-125Vdc/mid p.u.), 2 x RJ-45 ports (Modbus or IEC61850 with GOOSE), ladder logic firmware (PLC base).

Features

Feature

Basic Protection Relay S24

Sepam 20 Series

Standard Protection Relay S42

Sepam 40 Series

Advanced Protection Relay S84

Sepam 80 Series

Current Protection

Built in CB Control

Native Zone Selective Interlocking

Waveform Captures

Event Records

Voltage Protection

 

Frequency Protection

 

Field Expandable Communications

 

Synchro-check Protection (optional)

   

Native Automatic Throw over Scheme

   

Field expandable I/O

   

Ladder Logic PLC custom programming (optional)

   

Mimic-bus graphical display (optional)

   

Onboard data logging

   

Communications options

Modbus RTU

DPN

Modbus TCP/IP

 

IEC61850–MMS

 

IEC61850–MMS + GOOSE

   

Functions

ANSI Device Number

Description

Basic Protection Relay S24

Sepam 20 Series

Standard Protection Relay S42

Sepam 40 Series

Advanced Protection Relay S84

Sepam 80 Series

25

Synch Check

   

27

Phase-to-phase undervoltage

 

27D

Positive sequence undervoltage

   

27R

Remnant undervoltage

   

27S

Phase-to-neutral undervoltage

 

32P

Directional Power

 

37

Phase Undercurrent

   

46

Negative Sequence Current/Unbalance

47

Negative Sequence undervoltage

 

49

Thermal Overload

   

50

Instantaneous Phase Overcurrent

50BF

Breaker Failure

50G

Instantaneous Ground Overcurrent (Measured)

 

50N

Instantaneous Ground Overcurrent (Calculated)

51

Time Phase Overcurrent

51G

Time Ground Overcurrent(Measured)

 

51N

Time Ground Overcurrent(Calculated)

59

Phase-to-phase overvoltage

 

59N

Neutral Voltage Displacement

 

67

Directional Phase Overcurrent

 

67N

Directional Ground Overcurrent

 

79

Reclosing

81H

Overfrequency

 

81L

Underfrequency

 

81R

Rate of Change of Frequency

   

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