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Protection and Control Systems 


Basler serves the electric power industry with solid state relays for feeder, transmission, bus, transformer, generator and motor protection for any application. Designed to operate in harsh electrical environments, meeting or exceeding ANSI/IEEE and IEC standards, Basler utility grade and industrial grade  relays offer high accuracy, low burden, flexibility, and low maintenance. Basler's microprocessor based relays combine multifunction protection with control, metering, data acquisition, and networked communications.

Basler's retrofit relays provide a direct “plug and play” replacement for many obsolete designs and other Basler relays fit into the cutouts of older electromechanical relays. See Application Note PC-CASES.

Choose the relay type and the zone you would like to protect from the Application Table or review the listing below and then visit our Download section for product bulletins and manuals.
 

Utility Grade Products

Model No.

Relay Type

Bulletin / Resources

BE1 Numerical Protection Systems

BE1-11f

Feeder Protection System

URH

BE1-11i

Intertie Protection System

URI

BE1-11g

Generator Protection System

URJ

BE1-11m

Motor Protection System

URL  BE1-11m Easy BESTCOMSPlus Video

BE1-GPS100

Generator Protection System

UHQ

BE1-IPS100

Intertie Protection System

URB

BE1-1051

Overcurrent Protection System

UHS

BE1-951

Multifunction Protection System

UHR

BE1-851

Overcurrent Protection System

UHM

BE1-851E

Enhanced Overcurrent Protection System

UHW

BE1-700C

Overcurrent Protective Relay

URDC

BE1-700V

Voltage/Frequency Protective Relay

URDV  BE1-700V Easy BESTCOMS Video

BE1-CDS240

Current Differential System with Voltage

UHT

BE1-CDS220

Current Differential System

UHP

BESTCOMS Download LinkBESTCOMS™ Software

BE1 Protective Relays

BE1 Relays

Standards, Dimensions and Accessories

SDA

BE1-BPR

Breaker Protection

UHG

BE1-25

Sync-Check

UBP

BE1-27

Undervoltage

 

UBF

 

BE1-59

Overvoltage

BE1-27/59

Under/Overvoltage

BE1-32 O/U

Directional Over/Underpower

UBU

BE1-32R

Directional Overpower

UBU

BE1-40Q

Loss of Excitation

UBW

BE1-46N

Negative Sequence Overcurrent 

UDJ

BE1-47N

Negative Sequence Voltage

UDK

BE1-50

Instantaneous Overcurrent

UBC

BE1-50BF

Breaker Failure

UBT

BE1-50/51B

Time Overcurrent

UHD

BE1-50/51B-214, 215, 225

Time Overcurrent IAC Retrofit Kit

UHK

BE1-50/51B-218, 228

Time Overcurrent IAC Retrofit w/ Case

BE1-50/51B-219, 226

Time Overcurrent CO Retrofit Kit

BE1-50/51B-229

Time Overcurrent SFC Retrofit Kit

BE1-50/51B-230, 234

Time Overcurrent IAC66K Retrofit Kit

BE1-50/51B-231

Time Overcurrent IAC Retrofit Kit

BE1-50/51B-232

Time Overcurrent IAC Retrofit Kit

BE1-50/51B-233

Time Overcurrent IAC Retrofit Kit

BE1-50/51B-235, 236

Time Overcurrent IAC Arc Flash Retrofit Kit

BE1-50/51B-237, 238

Time Overcurrent CO Arc Flash Retrofit Kit

BE1-50/51B-239

Time Overcurrent IAC66K Retrofit w/ Case
Time Overcurrent IAC Arc Flash Retrofit w/ Case

BE1-50/51B-240

Time Overcurrent CO Retrofit Kit
(for FT-21 cradle)

BE1-50/51M

Time Overcurrent

UHE

BE1-51

Time Overcurrent

 

UDA

 

BE1-51/27C

Time Overcurrent Voltage Control

BE1-51/27R

Time Overcurrent Voltage Restraint

BE1-59N

Ground Fault Overvoltage

UBG

BE1-59NC

Capacitor Neutral Overvoltage

UHF

BE1-60

Voltage Balance

UBS

BE1-64F

Ground Fault

UHU

BE1-67

Phase Directional Time Overcurrent

UDQ

BE1-67N

Ground Directional Overcurrent

UDR

BE1-79A

Retrofit Reclosing Relay 

UHN

BE1-79M

Multiple Shot Reclosing Relay

UDL

BE1-81O/U

Digital Frequency

UBR

BE1-87B

Bus Differential Relay

UHC

BE1-87G

Variable Percentage Differential

UBK

BE1-87T

Transformer Differential 

UHA

BE3 Industrial Grade Products

Model No.

Relay Type

Bulletin

BE3 Industrial Grade Relays

BE3 Relays

Standards, Dimensions and Accessories

ULX

BE3-25

Synchronizing Check Relays 

ULA

BE3-27, BE3-59, BE3-27/59

AC Voltage Relays

ULB

BE3-27T, BE3-59T,
BE3-27T/59T

AC Voltage Relays with Time Delay

ULC

BE3-32

Reverse Power Relays 

ULD

BE3-37, BE3-51,
BE3-37/51

AC Current Relays

ULE

BE3-47

Phase Sequence Relays 

ULF

BE3-47N, BE3-47N/27

Phase Balance Relays

ULG

BE3-49R (3RTD)
BE3-49R (6RTD)

Temperature Relay

ULH

ULI

BE3-49TH, BE3-49TL

Thermocouple Relays

ULJ

BE3-74SH, BE3-74SL,
BE3-74SD

Millivolt Sensing Alarm Relays

ULN

BE3-74TL, BE3-74TH,
BE3-74TD

Milliamp Sensing Alarm Relays

ULO

BE3-74VL, BE3-74VH,
BE3-74VD

DC Voltage Sensing Alarm Relays

ULP

BE3-76SH

DC Overcurrent Relay with Inverse Time Delay

ULR

BE3-81O, BE3-81U,
BE3-81O/U

Frequency Relays

ULL

BE3-81OT, BE3-81UT,
BE3-81OT/UT

Frequency Relays with Time Delay

ULM

For more information, download a reference sheet to the protective relay ANSI Device numbers.

Automatic Synchronizers

Model No.

Relay Type

Bulletin

Automatic Synchronizers

BE1-25A

Automatic Synchronizer

UIM

BE3-25A

Auto-Synchronizer

UMP

 
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