Frequency protection relays

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Frequency 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...
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voltage protection relay
voltage protection relay
PCS-902S

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

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

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    NR Electric
    earth-leakage protection relay
    earth-leakage protection relay
    REF601

    Trigger voltage: 24 V - 265 V

    ... a dedicated feeder protection and control relay intended for the protection and control of utility and industrial power systems in primary and secondary distribution networks. The relay ...

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    ABB Oy Distribution Automation
    over-current protection relay
    over-current protection relay
    SIPROTEC 7SJ8 series

    ... SIPROTEC 7SJ80 relays can be used for feeder protection of high and medium-voltage networks with grounded, low-resistance grounded, isolated or a compensated neutral point. The relays have all the required ...

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    SIEMENS Energy automation and smart grid
    over-voltage protection relay
    over-voltage protection relay
    SEL-787-3E/-3S/-4X

    ... Transformer Protection Relay Protect and monitor most three- and four-winding transformers and terminals with the versatile SEL-787 Transformer Protection Relay platform. Select SEL-787-3E/-3S ...

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    Schweitzer Engineering Laboratories
    frequency protection relay
    frequency protection relay
    CGI 14S

    ... SELF POWERED FEEDER PROTECTION RELAY Product Overview The ‘CGI 14S' Self Powered Numerical Protection Relay is designed for use in unmanned substation where dependable auxiliary ...

    frequency protection relay
    frequency protection relay
    170 - 1 000 Hz | NS40A

    ... Proven Power has NS40A Audio Tone Frequency Shift Keyed Relay Channel. The carrier channel can be configured in the one-way to transfer trip application protection or in the two ways for the breaker failure ...

    feeder protection relay
    feeder protection relay
    SIR-A

    Tripping current: 1 A - 5 A
    Trigger voltage: 24 V - 230 V

    ... SIR-A Overhead Control / RTU & Feeder Protection The Fanox SIR-A is the Relay that offers the complete solution for Recloser Control and Feeder Protection with current, voltage, and frequency. 4 ...

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    FANOX ELECTRONIC
    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 ...

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    FANOX ELECTRONIC
    over-voltage protection relay
    over-voltage protection relay
    SIL-C

    Trigger voltage: 24 V - 230 V

    ... SIL-C FEEDER & GENERATOR PROTECTION RELAY High Accuracy and Reliability in a compact device The SIL-C Relay protects Feeders and Equipment and includes comprehensive current, voltage, and frequency ...

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    FANOX ELECTRONIC
    voltage protection relay
    voltage protection relay
    EMI-20

    Trigger voltage: 24 V - 230 V

    EMI-20/15 is the Contrel gateway for connecting Modbus devices to the ConSight cloud platform. It collects and centralises energy data from the field, enabling remote monitoring and supervision of installations with up to 15 Modbus devices.

    voltage protection relay
    voltage protection relay
    EMI-20

    Trigger voltage: 24 V - 230 V

    EMI-20/5 is the Contrel gateway for connecting Modbus devices to the ConSight cloud platform. It collects and centralises energy data from the field, enabling remote monitoring and supervision of installations with up to 5 Modbus devices.

    earth-leakage protection relay
    earth-leakage protection relay
    WRU10 series

    Trigger voltage: 110, 230 V

    ... Residual current protection parameters. Protection trip current. Protection status messages, etc. Unit with three programmable contact output relays, one switched ...

    earth-leakage protection relay
    earth-leakage protection relay
    FPC 200

    Tripping current: 0.3 A - 30 A

    ... FPC 200 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 ...

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    Iskra d.d.
    under-frequency protection relay
    under-frequency protection relay
    PHD series

    Trigger voltage: 87 V - 550 V

    ... normal conditions, with the supply frequency close to the nominal set point, both red LEDs are off with the Under relay energised and the Over relay de-energised. Should the supply fall below the opening ...

    over-voltage protection relay
    over-voltage protection relay
    900VPR-BL-U-CE

    Tripping current: 3, 5 A
    Trigger voltage: 50 V - 500 V

    ... • 3 phase RMS voltage protection relay • Monitors: Over / Under Voltage, Over / Under Frequency, Phase asymmetry, Phase failure, Phase sequence & Neutral loss • Accuracy: ± 1% of Voltage, ± 0.3Hz • ...

    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, ...

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    TELE Haase Steuergeraete GmbH
    over-voltage protection relay
    over-voltage protection relay
    XMR-P

    ... configuration) • Feeder Protection with additional Power protection element (SW PAC Power) • Feeder Protection with additional Directional Overcurrent and Earth Fault element (SW PAC ...

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    THYTRONIC
    over-current protection relay
    over-current protection relay
    VAMP 52

    ... and Motor Protection Relay Key Features: Multifunctional yet user-friendly Extensive thermal protection functions optimal for low and medium-sized asynchronous motors Directional earth fault protection ...

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    Vamp
    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 ...

    earth-leakage protection relay
    earth-leakage protection relay
    VIPAM3500

    Tripping current: 5 A
    Trigger voltage: 110 V

    ... Integrated Electronic Device) is a digital protection relay that enables a high-precision measurement and protection relay for switchgear power equipments. The switchgear panel became ...

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    VitzroEM Co., Ltd.
    over-voltage protection relay
    over-voltage protection relay
    T-PRO series

    ... station bus embedded T-PRO relay provides complete 3-phase multi-winding transformer fault and overload protection, DFR-quality fault oscillography, sequence of event logging, trend recording, in a fully integrated protective ...

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    ERLPhase
    over-voltage protection relay
    over-voltage protection relay
    KPFV51x series

    Trigger voltage: 100 V - 480 V

    ... KPFV51x - SINGLE PHASE - FREQUENCY AND VOLTAGE GUARD Under and Over Voltage and Frequency Protection Adjustable Voltage and Frequency Deviation Set points "Pathfinder" function Optional ...

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    Meagacon AS
    earth-leakage protection relay
    earth-leakage protection relay
    PR 260

    ... The PR 260 electric motor protection relay, known as the motor management relay, is designed for motor protection and control, which integrates protection, control, and ...

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    Chongqing Blue Jay Technology Co. Ltd
    voltage protection relay
    voltage protection relay
    EPPC02

    Tripping current: 10 A
    Trigger voltage: 250 V

    ... Single and three phase protection Phase failure (loss phase) protection Phase sequence protection Adjustable voltage protection Over voltage and/or low voltage protection Contact ...

    motor protection relay
    motor protection relay
    MPR-100

    ... Motor Protection Relay The device has been designed for continuous monitoring of electrical parameters in low voltage systems. It allows direct, close-distance or remote monitoring via RS-485 and bluetooth connectivity, ...

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    Orion Italia
    voltage protection relay
    voltage protection relay
    ETR304

    ... -Microprocessor-based digital protection relay for 4 way configuration of switchgear -Local and remote operation available by built-in RTU -DNP 3.0, MODBUS, IEC60870-5-101/104 communication protocols with SCADA capability ...

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    ENTEC ELECTRIC & ELECTRONIC CO.,LTD
    differential protection relay
    differential protection relay
    MCDGV 4

    over-voltage protection relay
    over-voltage protection relay
    MRU 4

    under-frequency protection relay
    under-frequency protection relay
    MP 250

    ... breaker). A complete set of mains protections is available. The relay features multistage protections for under and over voltages, under and over frequency as well as rate of change ...

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