Three-phase protection relays

Do you need help making a decision?  Take a look at our buying guide
44 companies | 184 products
exhibit your products

& reach your clients in one place, all year round

Exhibit with us
Search
Three-phase protection relays | Choosing the Right Protection Relay
Protection relays have different functions. They are often made up of several modules, each of which performs a specific function. In this guide, we will distinguish three types of functions: protection against abnormal variations in the main supply, protection against leakage currents, and protection against overloads. Protection against abnormal grid variations Abnormal voltage, current, and frequency variations can lead to problematic phenomena. These...
{{#pushedProductsPlacement4.length}} {{#each pushedProductsPlacement4}}
{{product.productLabel}}

{{product.productLabel}} {{product.model}}

{{#if product.featureValues}}
{{#each product.featureValues}} {{content}} {{/each}}
{{/if}}
{{#if product.productPrice }} {{#if product.productPrice.price }}

{{product.productPrice.formattedPrice}} {{#if product.productPrice.priceType === "PRICE_RANGE" }} - {{product.productPrice.formattedPriceMax}} {{/if}}
{{/if}} {{/if}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}} {{#each product.productTagAssociationList}}
{{/each}}
{{/each}} {{/pushedProductsPlacement4.length}}
{{#pushedProductsPlacement5.length}} {{#each pushedProductsPlacement5}}
{{product.productLabel}}

{{product.productLabel}} {{product.model}}

{{#if product.featureValues}}
{{#each product.featureValues}} {{content}} {{/each}}
{{/if}}
{{#if product.productPrice }} {{#if product.productPrice.price }}

{{product.productPrice.formattedPrice}} {{#if product.productPrice.priceType === "PRICE_RANGE" }} - {{product.productPrice.formattedPriceMax}} {{/if}}
{{/if}} {{/if}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}} {{#each product.productTagAssociationList}}
{{/each}}
{{/each}} {{/pushedProductsPlacement5.length}}
overload relay
overload relay
MP8000 series

Trigger voltage: 90 V - 690 V

... The MP8000 is an advanced motor protection electronic overload relay that is fully programmable via Bluetooth* using an iPhone* or Android* smartphone or tablet with the Littelfuse App. It is easy to use and arc-flash ...

See the other products
Littelfuse
voltage protection relay
voltage protection relay
PCS-902S

... six-zone phase-to-ground distance protection (21L)

  • Pilot distance and pilot directional earth-fault protection (85)
  • Power swing blocking/releasing logic (PSBR)
  • Multi-stage phase
  • ...

    See the other products
    NR Electric
    overload relay
    overload relay
    REM601

    ... REM601 is a dedicated motor relay designed for the protection and control of medium-voltage and low-voltage asynchronous motors in the manufacturing and process industry. The relay provides an optimized ...

    See the other products
    ABB Oy Distribution Automation
    differential protection relay
    differential protection relay
    SIPROTEC 7UT82

    ... transformer differential protection have been designed specifically for the protection of two and multi-winding (up to 5 sides). transformers. They are the main protection for the transformer and contain ...

    See the other products
    SIEMENS Energy automation and smart grid
    thermal protection relay
    thermal protection relay
    JRS1

    Tripping current: 0.16 A - 80 A
    Trigger voltage: 380 V

    ... JRS1 series thermal over-load relay is suitable for the circuit of AC50~60Hz, rated operating voltage Ue: 380V, rated current 0.1~80A, as the use of over-load and break phase protection for AC motor. ...

    See the other products
    PEOPLE ELE. APPLIANCE GROUP CO., LTD.
    phase loss protection relay
    phase loss protection relay
    INGEPAC EF LD

    Tripping current: 1 A - 5 A
    Trigger voltage: 24, 48, 125 V

    ... is a line-differential protection relay for segregated- phase line protection, designed for overhead transmission lines and underground cables across voltage levels. It offers comprehensive ...

    See the other products
    Ingeteam GmbH
    over-current protection relay
    over-current protection relay
    SEL-351S

    ... Protection System The SEL-351S Protection System offers comprehensive feeder and overcurrent protection perfect for industrial and utility feeder applications. Enhance your quality of ...

    See the other products
    Schweitzer Engineering Laboratories
    voltage protection relay
    voltage protection relay
    TCS series

    Trigger voltage: 110, 415, 240, 380 V

    ... Device for permanent control of the MCCB's tripping circuit or safety circuits ...

    earth-leakage protection relay
    earth-leakage protection relay
    RG1M series

    ... LED ON. Tripped relay. Power LED flashing and leakage LED ON. Detection of a continuity fault in the transformer. RG1M relays used with WGC transformers offer a full residual current protection ...

    earth-leakage protection relay
    earth-leakage protection relay
    RGE series

    ... Permanently: 100 % Applications The relays of the RGE series and the transformer of the WG / WGC series enable a full earth leakage protection for both single and three- phase lines. ...

    over-voltage protection relay
    over-voltage protection relay
    SIU-C

    Trigger voltage: 24 V - 230 V

    ... SIU-C represents the best and most precise protection solution for transformers and electrical machines in high, medium, and low-voltage distribution systems. The SIU-C is a voltage and frequency protection relay ...

    See the other products
    FANOX ELECTRONIC
    feeder protection relay
    feeder protection relay
    SIL-S LPIT

    ... SIL-S LPIT Feeder Protection We continue introducing new protection relays with comprehensive protection capabilities and a complete range of functions for switchgear in industrial and ...

    See the other products
    FANOX ELECTRONIC
    overload relay
    overload relay
    G/BG EEx

    Trigger voltage: 230, 115, 24 V

    ... Motor safety in volatile or harmful spaces is guaranteed by 3 dimensional ATEX 94/9/EC used for 3-stage motors offering up to 1000 Vac Currents between 1,5 and 630 A with greater thermal memory optical signal of tripping. ...

    See the other products
    FANOX ELECTRONIC
    current protection relay
    current protection relay
    CRC-12

    Tripping current: 0.1 A - 16 A
    Trigger voltage: 24 V - 250 V

    ... - **Physical Characteristics:** Relay housing width 18 mm, clip-on DIN rail. Adjustment via front levers. - **Features:** - Circuit protection: allows triggering an alarm or cutting power in case of overcurrent ...

    phase loss protection relay
    phase loss protection relay
    CRV1-31 series

    Trigger voltage: 300 V - 500 V

    ... CRV1-31 relay switches when the voltage of one of the phases exceeds the minimum or maximum thresholds and in case of phase reversal: - Electrical: CRV1-31: for three- phase ...

    earth-leakage protection relay
    earth-leakage protection relay
    DER4B/2D

    Tripping current: 0.03 A - 30 A
    Trigger voltage: 48 V - 400 V

    ... Din modules Dossena presents the DER4B range, the new generation of type B differential toroid relays. DER4B is recommended for electrical protection in the tertiary sector, where devices that generate alternating, ...

    See the other products
    DOSSENA
    earth-leakage protection relay
    earth-leakage protection relay
    DER4B/2I

    Tripping current: 0.03 A - 30 A
    Trigger voltage: 48 V - 400 V

    ... Recessed 96x96mm Dossena presents the DER3B range, the new generation of type B differential toroid relays. DER3B is recommended for electrical protection in the tertiary sector, where devices that generate alternating, ...

    See the other products
    DOSSENA
    earth-leakage protection relay
    earth-leakage protection relay
    DER4/0D

    Tripping current: 0.03 A - 30 A
    Trigger voltage: 48 V - 400 V

    ... The residual current relays of the DER4 Dossena range can be used on LV networks in alternating current of the TT and TN type. They make it possible to achieve adequate selectivity and residual current protection thanks ...

    See the other products
    DOSSENA
    under-voltage protection relay
    under-voltage protection relay
    FPC 400

    Tripping current: 5,000, 1 mA

    ... FPC 400 is a family of current or voltage digital protection relays with easy to use interface meant for variety of solutions in industry and power distribution. Its robust design enables it to be placed in demanding ...

    See the other products
    Iskra d.d.
    over-current protection relay
    over-current protection relay
    PAP series

    Trigger voltage: 24, 240 V

    ... level Imin, the protector will trip and the red LED will illuminate indicating the fault condition. During the time delay period the red LED will flash for the set time (t) before the relay de-energises output relay ...

    See the other products
    Crompton Instruments
    over-voltage protection relay
    over-voltage protection relay
    800VPR-3

    Tripping current: 5 A
    Trigger voltage: 310 V - 520 V

    ... • Three phase voltage Protection relay • Monitors: Over / Under voltage, Phase failure and Phase sequence • 1 C/O DPDT output relay • ...

    See the other products
    SELEC Controls Pvt. Ltd.
    motor protection relay
    motor protection relay
    RX series

    Tripping current: 1 A - 2,000 A
    Trigger voltage: 0 V - 600 V

    ... RX Motor Protection Relay Take your motor protection to a new level. The RX Series provides more than just solid state overload or power protection relays. By using ...

    grid and system protection relay
    grid and system protection relay
    NA003-M64

    Trigger voltage: 24, 110 V

    ... Grid protection monitoring relay RE series; Frequency and voltage monitoring; Grid and system protection; Functionally Safe; Measuring voltage 3 x 400/230V AC; Supply voltage 24V DC, 110-240V AC; 3 CO ...

    See the other products
    TELE Haase Steuergeraete GmbH
    arc flash protection relay
    arc flash protection relay
    AFR-M series

    Tripping current: 5 A
    Trigger voltage: 220 V

    ... The AFR-M Arc flash protection relay is designed to monitor the busbar sections within a power system for potential arc fault occurrences. This advanced arc flash relay can monitor up to 48 busbar sections ...

    See the other products
    Chongqing Blue Jay Technology Co. Ltd
    phase sequence protection relay
    phase sequence protection relay
    RZ1FK116

    See the other products
    EMAS
    phase unbalance protection relay
    phase unbalance protection relay
    MS2P49

    ... sensitive earth fault protection, the MS2P49 relay using solid state techniques, can be applied to detect earth currents down to 0.5% of the CT nominal current. The MS2P49 relay is a phase ...

    See the other products
    Mors Smitt BV
    thermal protection relay
    thermal protection relay
    TOR-C, RTD, RTE

    ... Setting range from 0,3 up to 800 A Direct mounting on contactor or separated with special kit Automatic reset and /or manual ...

    over-current protection relay
    over-current protection relay
    AQ-110F

    ... connections. AQ 110 is a multipurpose arc flash protection unit and can be applied for variety of applications. AQ 110 can be used as a stand-alone unit or as a main unit of a more complex arc protection system through ...

    See the other products
    Arcteq Relays Ltd
    phase loss protection relay
    phase loss protection relay
    FK-01

    Trigger voltage: 380 V

    ... Phase Failure Relay Features The phase protection relays are designed to protect the three- phase loads from damage caused by mains ...

    See the other products
    Tense Electronic
    level protection relay
    level protection relay
    MC Line

    ... DIGITAL RELAYS FOR PROTECTION, MONITORING AND CONTROL The MC line has been designed to offer to the market a very competitive protective relay responding to the latest requirements ...

    thermal protection relay
    thermal protection relay
    RHU & RHN Series

    Tripping current: 0.1 A - 38 A

    ... of carbon emissions Comply with IEC, and China GB standard Certificate : CSA, UL Comply with RoHS, CE ‧ Phase failure protection‧Trip class : 10A ...

    See the other products
    TECO ELECTRIC & MACHINERY Co., Ltd.
    exhibit your products

    & reach your clients in one place, all year round

    Exhibit with us
    DirectIndustry RFQ: Free quotation comparison tool
    Receive and compare quotations for free
    Describe your project
    We select
    the best suppliers
    Compare quotations and complete your purchase