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    Transmission & Distribution Relay Solutions

    Ensure reliable electrical protection with advanced relays and monitoring devices, safeguarding power systems and equipment integrity.

    Safeguard your power distribution networks with our comprehensive range of transmission distribution relays. Our comprehensive range features ground fault relays, phase/voltage loss relays, ground fault sensors, voltage/phase monitors, and permissive relays for all your transmission distribution relay needs. Whether you're safeguarding power distribution systems, monitoring critical electrical parameters, or ensuring equipment protection, our Transmission Distribution Relays provide the advanced functionality and reliability needed for optimal performance and safety in industrial environments. Shop now for cutting-edge transmission distribution relays to enhance your power system's reliability and safety.

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    Results 351-400 of 821.
    SCHNEIDER ELECTRIC RM3TR112VS7

    SCHNEIDER ELECTRIC

    TELEMECANIQUE

    RM3TR112VS7

    DISCONTINUED BY MANUFACTURER, VOLTAGE LOSS RELAY, 3 PHASE, 380-420 VAC, 50/60 HZ, DIN RAIL MOUNT
    ✓ IN STOCK!
    Buy Surplus As Low As $370.80
    $370.80
    SCHNEIDER ELECTRIC RM4-TA31

    SCHNEIDER ELECTRIC

    TELEMECANIQUE

    RM4-TA31

    DISCONTINUED BY MANUFACTURER, PHASE FAILURE, RELAY, 300V, 5A, RM4
    ✓ IN STOCK!
    Buy Surplus As Low As $240.00
    $240.00
    SCHNEIDER ELECTRIC RM4UA33MW

    SCHNEIDER ELECTRIC

    TELEMECANIQUE

    RM4UA33MW

    DISCONTINUED BY MANUFACTURER, VOLTAGE RELAY, 300V, 5AMP, RM4, + OPTIONS, REPLACED BY RM22UA33MR
    ✓ IN STOCK!
    Buy Surplus As Low As $570.00
    $570.00
    SCHNEIDER ELECTRIC S48891

    SCHNEIDER ELECTRIC

    SQUARE D

    S48891

    GROUND FAULT INTERFACE MODULE, USED ON: ,M/P/R FRAME, NS630B, NS3200 ,ELECTRONIC TRIP CIRCUIT BREAKER
    ✓ IN STOCK!
    Buy Surplus As Low As $1,523.82
    $1,523.82
    Repair Yours $1,350.00
    FW MURPHY OFR500

    FW MURPHY

    OFR500

    DISCONTINUED BY MANUFACTURER, RELAY OVER FREQUENCY, FRONT STATUS LEDS, 12 PORTS
    ✓ IN STOCK!
    Buy Surplus As Low As $311.00
    $311.00
    Repair Yours $300.00
    SCHNEIDER ELECTRIC RM22TA33

    SCHNEIDER ELECTRIC

    SQUARE D

    RM22TA33

    PHASE MONITORING RELAY, RM22 SERIES, 380-480 VAC, 2 NO/NC, 8 AMP/250 VAC, ELECTROMECHANICAL RELAY TYPE, DIN RAIL MOUNT
    ✓ IN STOCK!
    $250.29 Buy Surplus As Low As $146.00
    $146.00
    Repair Yours $300.00
    SIEMENS 3RQ3118-1AB00

    SIEMENS

    3RQ3118-1AB00

    OUTPUT COUPLER, WITH PLUG-IN RELAY, 1 CHANGE-OVER CONTACT SCREW TERMINAL, 6 AMP, 24 VAC/DC, 50/60 HZ, DIN RAIL MOUNT
    ✓ IN STOCK!
    $86.00 Buy Surplus As Low As $44.44
    $44.44
    Repair Yours Contact Us
    INGERSOLL RAND RLY3715

    INGERSOLL RAND

    TRANE

    RLY3715

    START RELAY, SPST 35 AMP, REPLACES RLY1097, HVAC PARTS, SAME AS 3ARR3-J4A4, B100201P06,RLY1097,RLY-01097,RLY3715
    ✓ IN STOCK!
    $86.00 Buy Surplus As Low As $32.76
    $32.76
    Repair Yours $300.00
    ASEA BROWN BOVERI 3AUA0000139144

    ASEA BROWN BOVERI

    3AUA0000139144

    FAN KIT, ACH550, R4 & R6 FRAMES, NEMA 1, INCLUDES HEATSINK FAN, RETAINER
    ✓ IN STOCK!
    $382.00 Buy Surplus As Low As $230.58
    $230.58
    AUTOMATION DIRECT GFSL30-M1A-120A-F

    AUTOMATION DIRECT

    ACUAMP

    GFSL30-M1A-120A-F

    ACUAMP GROUND FAULT SENSOR, LARGE APERTURE FIXED CORE, 5, 10, OR 30 MA SELECTABLE TRIP POINT, RELAY, SPST-N.O., MANUAL RESET OUTPUT, 120 VAC OPERATING VOLTAGE.
    ✓ IN STOCK!
    $544.39 Buy Surplus As Low As $236.43
    $236.43
    Repair Yours $300.00
    ASEA BROWN BOVERI 1495B30A22

    ASEA BROWN BOVERI

    1495B30A22

    DISCONTINUED BY MANUFACTURER, VOLTAGE RELAY, 120V, 250VDC, IVS 55-140VAC, TYPE CV7
    ✓ IN STOCK!
    Buy Surplus As Low As $430.28
    $430.28
    Repair Yours $407.33
    MARSH BELLOFRAM ARA-120-AFE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    ARA-120-AFE

    RELAY, ARA SERIES, ALTERNATING RELAY, SURFACE-MOUNT, TRIPLEXOR, 120 VAC, 10 AMP
    ✓ IN STOCK!
    $479.75 Buy New $479.75
    $288.04
    Repair Yours $300.00
    MARSH BELLOFRAM AC-301-440

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    AC-301-440

    THREE PHASE MONITOR, AC-301 SERIES, DELAY-ON-MAKE, 430-480 VAC OPERATING, 2 SECOND DELAY ON DROP OUT
    ✓ IN STOCK!
    $494.47 Buy New $494.47
    $236.23
    Repair Yours $300.00
    MARSH BELLOFRAM DPR175A

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    DPR175A

    PHASE MONITORING RELAY, SPDT, 170-290VAC; PRODUCT RANGE:-; CONTACT CONFIGURATION:SPDT; CONTACT CURRENT:5A; RELAY MOUNTING:DIN RAIL; RELAY TERMINALS:SCREW; SWITCHING VOLTAGE MAX:250VAC; SUPPL ...
    ✓ IN STOCK!
    $145.25 Buy New $145.25
    $110.39
    Repair Yours $300.00
    MARSH BELLOFRAM DPR350B

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    DPR350B

    PHASE MONITOR, TIME DELAY, 3 PHASE, 460 VAC, DIN RAIL MOUNT
    ✓ IN STOCK!
    $198.00 Buy New $198.00
    $135.90
    Repair Yours $300.00
    MARSH BELLOFRAM CMI-120-ASE-20

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    CMI-120-ASE-20

    OVERCURRENT MONITOR RELAY, AC, W/ MANUAL RESET, CMI MODEL, OUTPUT - 10 AMPS @ 120 V AC - RESISTIVE, DPDT, CONTROL VOLTAGE - 120 V AC, 50/60 HZ, CURRENT TRIP POINTS - 4-20 AMP
    ✓ IN STOCK!
    $564.20 Buy New $564.20
    $243.00
    Repair Yours $300.00
    MARSH BELLOFRAM CMO-120-ASA-1

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    CMO-120-ASA-1

    OVERCURRENT MONITOR RELAY, AC, W/ MANUAL RESET, CMO MODEL, OUTPUT - 10 AMPS @ 120 V AC - RESISTIVE, DPDT, CONTROL VOLTAGE - 120 V AC/DC, 50/60 HZ, PLUG-IN ENCLOSURE, CURRENT TRIP POINTS - 0. ...
    ✓ IN STOCK!
    $757.50 Buy New $757.50
    $280.20
    Repair Yours $300.00
    MARSH BELLOFRAM CMO-120-ASE-10

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    CMO-120-ASE-10

    OVERCURRENT MONITOR RELAY, CMO SERIES, 24-120 V AC/DC, 50/60 HZ, SURFACE MOUNT, 2-10 AMP ADJUSTABLE TRIP POINTS
    ✓ IN STOCK!
    $522.00 Buy New $522.00
    $250.37
    Repair Yours $300.00
    MARSH BELLOFRAM CMU-120-ASA-5

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    CMU-120-ASA-5

    UNDER CURRENT MONITOR, CMU SERIES, 120 VAC, PLUG-IN, 1 TO 5 AMP ADJUSTABLE CURRENT TRIP POINTS, 11 PIN
    ✓ IN STOCK!
    $469.69 Buy New $469.69
    $253.63
    Repair Yours $300.00
    MARSH BELLOFRAM CMU-24-DSA-1

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    CMU-24-DSA-1

    OVERCURRENT MONITOR RELAY, AC, W/ MANUAL RESET, CMU MODEL, OUTPUT - 10 AMPS @ 120 V AC - RESISTIVE, DPDT, CONTROL VOLTAGE - 24 V AC/DC, 50/60 HZ, PLUG-IN ENCLOSURE, CURRENT TRIP POINTS - 0.2 ...
    ✓ IN STOCK!
    $431.25 Buy New $431.25
    $257.86
    Repair Yours $300.00
    MARSH BELLOFRAM CMB-120-AFA-1

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    CMB-120-AFA-1

    CURRENT MONITORING RELAY, CMB SERIES, AC GO/NO-GO, 120 V AC, 50/60 HZ, 1 AMPS, SINGLE POLE DOUBLE THROW, 8-PIN OCTAL TERMINATION
    ✓ IN STOCK!
    $196.00 Buy New $196.00
    $114.00
    Repair Yours $300.00
    MARSH BELLOFRAM SLA-120-ALA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLA-120-ALA

    PHASE SEQUENCE/LOSS MONITOR, 120V, LOCK SHAFT ADJUSTABLE, 11 PIN CIRCULAR BASE
    ✓ IN STOCK!
    $518.48 Buy New $518.48
    $327.40
    Repair Yours $300.00
    MARSH BELLOFRAM SLA-220-AFN

    MARSH BELLOFRAM

    ATC

    SLA-220-AFN

    DISCONTINUED BY MANUFACTURER, PHASE SEQUENCE, LOSS MONITOR
    ✓ IN STOCK!
    Buy Surplus As Low As $209.43
    $209.43
    Repair Yours $300.00
    MARSH BELLOFRAM SLA-230-ALER

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLA-230-ALER

    PHASE MONITOR/RELAY, PHASE SEQUENCE/LOSS MONITOR, 230V, LOCK SHAFT ADJ, SURFACE MOUNT, MANUAL RESET
    ✓ IN STOCK!
    $793.50 Buy New $793.50
    $471.43
    Repair Yours $381.00
    MARSH BELLOFRAM SLA-230-ASA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLA-230-ASA

    PHASE MONITOR, 190-270 VAC, 50/60 HZ, CONTACTS 10 AMP @ 240 VAC, RESISTIVE 345 VAC
    ✓ IN STOCK!
    $162.54 Buy New $162.54
    $97.59
    Repair Yours $300.00
    MARSH BELLOFRAM SLA-440-AFE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLA-440-AFE

    PHASE MONITOR/RELAY
    ✓ IN STOCK!
    $563.50 Buy New $563.50
    $289.61
    Repair Yours $300.00
    MARSH BELLOFRAM SLA-440-ALE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLA-440-ALE

    PHASE MONITORING/RELAY, PHASE SEQUENCE/LOSS MONITOR, 430-480 VAC, 3 PHASE SUPPLY
    ✓ IN STOCK!
    $398.04 Buy New $398.04
    $233.26
    Repair Yours $300.00
    MARSH BELLOFRAM SLA-480-AFE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLA-480-AFE

    PHASE VOLTAGE MONITOR, RELAY, SLA SERIES, 480 VAC, SURFACE MOUNTED
    ✓ IN STOCK!
    $793.00 Buy New $793.00
    $603.00
    Repair Yours $300.00
    MARSH BELLOFRAM SLD-380-ALE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLD-380-ALE

    PHASE MONITOR RELAY,
    ✓ IN STOCK!
    $646.62 Buy New $646.62
    $451.89
    Repair Yours $300.00
    MARSH BELLOFRAM SLD-440-ALE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLD-440-ALE

    PHASE MONITORING RELAY, 440-480 VAC, DPDT, 3 AMP, 600 VAC, SCREW TERMINATION
    ✓ IN STOCK!
    $782.07 Buy New $782.07
    $469.24
    Repair Yours $300.00
    MARSH BELLOFRAM SLE-440-ALE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLE-440-ALE

    RELAY, PHASE LOSS, UNBALANCE & UNDER VOLTAGE RELAY
    ✓ IN STOCK!
    $610.50 Buy New $610.50
    $297.06
    Repair Yours $300.00
    MARSH BELLOFRAM SLM-120-ASE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLM-120-ASE

    PHASE MONITORS MICROPROCESSOR CONTROLLED,
    ✓ IN STOCK!
    $868.50 Buy New $868.50
    $527.82
    Repair Yours $322.91
    MARSH BELLOFRAM SLM-230-ASE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLM-230-ASE

    PHASE MONITOR, MICROPROCESSOR CONTROLLED, 200-250 VAC, CONTACTS: 10 AMP @ 240 VAC
    ✓ IN STOCK!
    $599.14 Buy New $599.14
    $383.00
    Repair Yours $308.00
    MARSH BELLOFRAM SLM-440-ASE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLM-440-ASE

    PHASE MONITOR, TIME DELAY, 440-490 VAC, 50/60 HZ, 3 AMP
    ✓ IN STOCK!
    $813.88 Buy New $813.88
    $488.33
    Repair Yours $300.00
    MARSH BELLOFRAM SLU-100-ASA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLU-100-ASA

    PHASE MONITORING RELAY, SLU-100 SERIES, UNIVERSAL, SPDT CONTACT FORM, 10 AMP, 8 PIN, 550 VAC SUPPLY, 240 V RATING
    ✓ IN STOCK!
    $207.00 Buy New $207.00
    $109.00
    Repair Yours $300.00
    MARSH BELLOFRAM SLU-100-ASD

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SLU-100-ASD

    PHASE MONITOR RELAY, SLU-100 SERIES, 3-PHASE, DIN RAIL MOUNT, UNIVERSAL, SPDT CONTACT FORM, 10 AMP, 550 VAC SUPPLY, 240 V RATING
    ✓ IN STOCK!
    $669.00 Buy New $669.00
    $509.00
    Repair Yours $306.00
    MARSH BELLOFRAM PBD-440-ALE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    PBD-440-ALE

    3 PHASE SEQUENCE & VOLTAGE BAND MONITOR/RELAYS, MAX VOLTAGE 550 VAC, ADJUSTABLE RANGES 390-480 UNDER/440-540 OVER, DPDT, CONTACT RATING 600 VAC, AUTOMATIC RESET
    ✓ IN STOCK!
    $592.00 Buy New $592.00
    $339.00
    Repair Yours $300.00
    MARSH BELLOFRAM PBD-480-ALE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    PBD-480-ALE

    PHASE SEQUENCE AND VOLTAGE BAND MONITOR,480VAC 50/60HZ,CONTACTS 10AMP 240VAC RES,360VA 600VAC IND
    ✓ IN STOCK!
    $595.90 Buy New $595.90
    $225.89
    Repair Yours $300.00
    MARSH BELLOFRAM PBE-440-ASE

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    PBE-440-ASE

    THREE PHASE VOLTAGE BAND MONITOR RELAY
    ✓ IN STOCK!
    $1,238.17 Buy New $1,238.17
    $742.90
    Repair Yours $541.00
    MARSH BELLOFRAM PRA-100-AFA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    PRA-100-AFA

    PHASE SEQUENCE MONITOR, 208-480VAC SUPPLY, CONTACTS 10A AT 240VAC, 8PIN SOCKET
    ✓ IN STOCK!
    $309.00 Buy New $309.00
    $220.90
    Repair Yours $300.00
    MARSH BELLOFRAM GFD-100

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    GFD-100

    THREE PHASE GROUND FAULT DISPLAY, 208 - 600 VAC, TERMINAL STYLE - WIRE LEADS, 0 C - 55 C
    ✓ IN STOCK!
    $882.50 Buy New $882.50
    $529.50
    Repair Yours $304.00
    MARSH BELLOFRAM SUA-230-ALA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    SUA-230-ALA

    PHASE MONITOR RELAY, SPDT, 10 AMP AT 240 VAC, 190-270 V ADJUSTABLE, LOCK SHAFT, OCTAL PLUG IN
    ✓ IN STOCK!
    $340.40 Buy New $340.40
    $164.75
    Repair Yours $300.00
    MARSH BELLOFRAM UOA-110-DKA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    UOA-110-DKA

    SINGLE PHASE UNDER VOLTAGE MONITOR/RELAY, 110 VDC, 92-130 VDC TRIP RANGE, 0.05 SEC TO 0.5 SEC, DPDT (2 FORM C), 5 A @ 240 VAC
    ✓ IN STOCK!
    $311.90 Buy New $311.90
    $187.14
    Repair Yours $300.00
    MARSH BELLOFRAM VBA-208-AFN

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    VBA-208-AFN

    SINGLE PHASE VOLTAGE BAND MONITOR/RELAYS
    ✓ IN STOCK!
    $767.02 Buy New $767.02
    $460.21
    Repair Yours $327.00
    MARSH BELLOFRAM VBA-208-ALA

    MARSH BELLOFRAM

    ATC DIVERSIFIED ELECTRONICS

    VBA-208-ALA

    SINGLE PHASE VOLTAGE BAND MONITOR/RELAYS
    ✓ IN STOCK!
    $554.60 Buy New $554.60
    $331.33
    Repair Yours $300.00
    ASEA BROWN BOVERI 419904051AB

    ASEA BROWN BOVERI

    BALDOR RELIANCE

    419904051AB

    BRUSH EXTRUDER DUTY C
    ✓ IN STOCK!
    $86.89 Buy New $86.89
    $55.55
    Repair Yours $300.00
    ASEA BROWN BOVERI 64418-1V

    ASEA BROWN BOVERI

    BALDOR RELIANCE

    64418-1V

    RELAY
    ✓ IN STOCK!
    $2,018.75 Buy New $2,018.75
    $829.10
    Repair Yours $806.62
    ASEA BROWN BOVERI 69326-2R

    ASEA BROWN BOVERI

    BALDOR RELIANCE

    69326-2R

    RELAY, POWER TYPE, 24VDC COIL
    ✓ IN STOCK!
    Buy Surplus As Low As $44.17
    $44.17
    GENERAL ELECTRIC 350-E-P5-G5-H-E-S-N-N-1E-D-N

    GENERAL ELECTRIC

    MULTILIN

    350-E-P5-G5-H-E-S-N-N-1E-D-N

    DISCONTINUED BY MANUFACTURER, FEEDER PROTECTION RELAY, PHASE CURRENTS - 5 AMP / 3 PHASE, GROUND CURRENTS - 5 AMP STANDARD, 110-250 V DC, 110-230 V AC, 50/60HZ
    ✓ IN STOCK!
    Buy Surplus As Low As $2,637.52
    $2,637.52
    Repair Yours $2,189.14
    TELE CONTROLS G2PM400VSY20 24-240VAC/DC

    TELE CONTROLS

    G2PM400VSY20 24-240VAC/DC

    VOLTAGE MONITORING RELAY, GAMMA SERIES, DPDT, 3 AMP, ZOOM VOLTAGE 24 TO 240 VAC/DC, SCREW TERMINALS, DIN RAIL MOUNT
    ✓ IN STOCK!
    $298.70 Buy New $298.70
    $221.00
    Repair Yours $200.00
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