Protection Relays

Protection Relays

System protects MV to EHV transmission lines.

Utilizing dual algorithms, D90Plus sub-cycle distance relay features true convergence of multiple functions, including automation and control, digital fault recording, communications, and local HMI capabilities. Advanced automation engine with user programmable logic provides millisecond deterministic execution rates, irrespective of program size. With 128 samples/cycle multi-channel analog and...

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Protection Relays

Generator Protection System uses Synchrophasor technology.

Designed to protect and control medium to large-sized ac generators, Model G60 supports Synchrophasor technology, which allows power providers to monitor how instabilities are affecting points of generation. Measurements are updated every 16.67 ms, providing critical recording of power system disturbances. Accumulated Over/Under frequency protection monitors amount of time generator has been...

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Protection Relays

Motor Protection Relay offers multiple metering and relaying.

Conforming to UL 1053 ground fault protection standard, Cutler-Hammer® MP-4000 motor protection relay offers protection, fault diagnostics, power metering, and communication options such as Modbus RTU and Device Net. Voltage Transformer inputs enable protection functions and metering such as under/over voltage, negative sequence voltage, power factor, and frequency. Relay features Intel-I-Trip...

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Pluggable 6 A Relay measures 6.2 mm wide.
Protection Relays

Pluggable 6 A Relay measures 6.2 mm wide.

Comprised of 4 models, CWRE series mounts on DIN rail and features heavy-duty electromechanical relays that are rated AC or DC and suit all types of inductive applications. Series carries voltage rating of 24 Vac/dc, 120 Vac/dc, and 230 Vac. In addition to pluggable jumper that can be used to common inputs and outputs, pluggable bridges are available for parallel coil and contact connections....

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Monitoring Relays come in 22.5 mm housing.
Protection Relays

Monitoring Relays come in 22.5 mm housing.

DIN-sized Monitoring Relays provide current, voltage, and liquid level monitoring for early warning of system failures. Series includes relays for single-phase current and voltage monitoring, relays for 3-phase voltage monitoring, plus conductive level control model. Available with 1 or 2 SPDT outputs, units feature relay contact capacity of 6 A at 250 Vac. LEDs on front provide visual indication...

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Monitoring Relay enables flexible use.
Protection Relays

Monitoring Relay enables flexible use.

Sirius 3UG4 monitoring Relay can be flexibly adapted using wide range of parameter settings such as: phase sequence, asymmetry, undervoltage or overvoltage, delay times, and reset response. Unit has wide voltage range of 160-690 V. Unit is equipped with a display. Indication of actual value and type of fault facilitates installation and fault diagnostics. Together with contactor reversing...

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Relay protects 3-phase motors from thermal overload.
Protection Relays

Relay protects 3-phase motors from thermal overload.

Model SEL-749M protects against nuisance tripping while enabling release of maximum horsepower. True Temperature-Based Thermal Overload Model tracks heating effects of load and current imbalance while motor is accelerating and running, thereby handling all motor operation scenarios. Adaptive Overcurrent Element technology enables unit to protect against high fault-current conditions when Current...

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Differential Relay eliminates need for settings.
Protection Relays

Differential Relay eliminates need for settings.

Microprocessor-based SEL-387L Line Current Relay suits applications with identical-ratio CTs at both ends of line, with digital communications channel interface between relays. Restraint technology provides secure, high-speed ground fault differential and sensitive phase protection, uncompromised by communication asymmetry, CT saturation, or different in-feeds. Negative- and zero-sequence...

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Phase Monitoring Relay has compact housing.
Protection Relays

Phase Monitoring Relay has compact housing.

Built with 17.5 mm DIN rail mount housing, DPA53 Series has user-selectable NC/NO relay output that detects under-voltage and improper phase sequence or phase loss. Product lets users know if all phases are present and have correct sequence and voltage. Red LED visually indicates alarm condition, and time delay option is built-in for relay activation. Voltage monitoring ranges are available for...

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