Sepam™ Busbar Applications

Sepam Busbar Applications

B22

B80/B83

Busbar protection is broken into two sections Basic and Advanced. The Basic protection is covered with our Sepam B22 protection relay and handles voltage and frequency protectoin. The Advanced protection is covered with the Sepam B80/B83 and covers current, voltage, frequency, and synchro check protection functions.

Basic Protection Relay (B22 - Sepam 20 Series)

Typical Part Number: SQ1G40A1B1A0A0 Series 20 - Busbar Protection B22 (24-250Vdc & 120-240Vac), VT inputs, 10In/8Out (110-125 Vdc, 110Vac), RS485

Advanced Protection Relay (B80/B83 – Sepam 80 Series)

Typical Part Number: SQ1B83P1J5A0B0 Series 80 - Busbar 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

B22

B80

B83

Current Protection

 

Built in CB Control

Native Zone Selective Interlocking

Waveform Captures

Event Records

Voltage Protection (2 sets of VTs on B83)

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 + GOOSE

 

Functions

ANSI Device Number

Description

B22

B80

B83

25

Synch Check

 

27

Phase-to-phase undervoltage

27D

Positive sequence undervoltage

27R

Remnant Undervoltage

27S

Phase-to-neutral undervoltage

46

Negative Sequence Current/Unbalance

 

47

Negative Sequence undervoltage

50BF

Breaker Failure

 

50

Instantaneous Phase Overcurrent

 

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

81H

Overfrequency

81L

Underfrequency

81R

Rate of Change of Frequency

   

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