Products/Services for Protective Relay Distributors
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Protective Relays and Monitoring Relays - (318 companies)...or in the protective system. Monitoring relay functions include fault detection, voltage checking, and direction-sensing that confirms power system conditions, but does not directly sense the fault or problem. Both protective relays and monitoring relays may... Search by Specification | Learn More -
Safety Relays - (154 companies)...faults. Relay Configuration. The GlobalSpec SpecSearch database contains information about both single and dual channel safety relays. Single channel relays are capable of accepting a single normally closed (NC) input and are unable to detect short... Search by Specification | Learn More -
Ground Fault Relays - (31 companies)...may provide both predictive and protective features. Typically, output signals are sent to a remote meter or programmable logic controller (PLC). Ground fault relays with on-line and off-line modes are designed to provide continuous protection from... Search by Specification | Learn More -
Thermal Overload Relays - (158 companies)...current for an extended period of time. To accomplish this, thermal overload relays contain a normally closed (NC) relay. When excessive current flows through the motor circuit, the relay opens due to increased motor temperature, relay temperature... Search by Specification | Learn More -
No Image AvailableElectrical Maintenance Services - (62 companies)...boards, power lines, power meters, and power supplies. In addition to power equipment, power factor machinery, and power generation systems, electrical maintenance services may test or replace protective relays, SF6 breakers, switchgear, uninterruptible... Learn More
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Protective Packaging - (723 companies)Protective packaging is packaging that is designed and constructed of materials to protect the goods from atmospheric, magnetic, electrostatic, vibration or shock damage. There are many different types of protective packaging including air pillows... Search by Specification | Learn More
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Laser Protective Eyewear - (49 companies)Laser protective eyewear includes glasses and goggles designed to filter out harmful radiation from lasers. If left unprotected, the human eye can be damaged permanently from direct or reflected laser beams and radiation. Laser protective eyewear... Search by Specification | Learn More
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Electromechanical Relays - (726 companies)...relay design. Image credit: TE Connectivity. Aerospace / MIL-SPEC Relays. Relays may be manufactured for aerospace and defense applications, and may also meet a number of U.S. military standards (MIL-SPEC). Common standards for relays include MIL-PRF... Search by Specification | Learn More
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Relay Sockets - (149 companies)Relay Sockets Information. Relay sockets are devices that accept relays, electromechanical switches in which the variation of current in one electric circuit controls the flow of electricity in another circuit. Relay sockets are made of metal... Search by Specification | Learn More
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Solid State Relays - (606 companies)Automation | Opto 22 | CCI Thermal Technologies Inc. A solid state relay (SSR) is an electrically operated switch with no moving components. Understanding Solid State Relays. Solid state relays are electrically operated switches used to isolate... Search by Specification | Learn More
Product News for Protective Relay Distributors
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Megger
SMRT36 for Protective Relay Testing design, the SMRT36 is positioned for future challenges associated with smart grid testing. The SMRT36 is Megger's fourth generation of automated relay test sets. This test set takes full advantage of Megger's patented developments from previous models to produce an instrument that offers greater precision than its predecessors, with reduced size and reduced weight of only 12 kg. The SMRT Solution. The SMRT Power Box is specifically designed to test protective relays that are used in conjunction... (read more)Browse Electrical Safety Testers Datasheets for Megger -
SMC International
Universal Three-phase Protective Relay Test Set The Mentor 12 is the most advanced three-phase relay test set available for type and field testing of electromechanical and digital protections of any kind, in traditional or IEC-61850 based substations. UNIQUE CHARACTERISTICS: Modular -Plug & Play output amplifiers and functional components that can be installed and replaced by the user. The minimum configuration includes: 3 voltage + 3 current outputs, switchable to 6 current outputs. User-upgradeable up to 12 outputs (two complete... (read more)Browse Relay Test Equipment Datasheets for SMC International -
Teledyne Relays
Teledyne Relays Announces New DHR Relay Series Teledyne Relays has introduced the DHR series to their industrial solid-state relays product line. The DHR series is suitable for applications where spacing is limited, and high cycle rate is needed. The features of the DHR Series include: new high efficiency back-to-back thyristors for long lifetime expectancy, zero-cross models designed for resistive loads, input protection and control LED standard, IP20 protective plastic covers. The DHR relays are designed to conform... (read more)Browse Solid State Relays Datasheets for Teledyne Relays -
Teledyne Relays
Teledyne Relays Announces New DH Relay Series Teledyne Relays has introduced the DH series to their industrial solid-state relays product line. The DH series are suitable for applications where spacing is limited, and high cycle rate is needed. The features of the DH Series are: new high efficiency back-to-back thyristors for long lifetime expectancy, zero-cross models designed for resistive loads; (-16 model suitable for most type of loads), input protection and control LED standard, IP20 protective plastic cover, designed... (read more)Browse Solid State Relays Datasheets for Teledyne Relays -
Littelfuse, Inc.
Arc Relay Case Study compared to most relays, ” Deschamps said. After the relay was installed, an engineering firm rerated the cabinet ’s arc flash hazard rating from a Hazard Risk Category 4 to a Hazard Risk Category 2, a level easily approachable using 8 cal/cm 2 PPE. Read the rest at Littlefuse.com/afv... (read more)Browse Protective Relays and Monitoring Relays Datasheets for Littelfuse, Inc. -
Littelfuse, Inc.
Arc-Flash Relay of the fastest detection times in the industry. It identifies and trips on an arc flash 300 times faster than 'the blink of an eye,' which takes about 300-400 milliseconds," said Tony Locker, P.E., Product Manager for Littelfuse Protection Relays. "Speed is extremely important as early detection of an arc-flash minimizes damage to expensive equipment, potential for fire, and more importantly, injury to personnel." Locker adds, "Our Arc-Flash Relay really sets a new standard for this product category... (read more)Browse Protective Relays and Monitoring Relays Datasheets for Littelfuse, Inc. -
GE Digital Energy
Universal Relays -- Protection & Control Systems on critical communications. Embedded IEEE 1588 time synch protocol support eliminates dedicated IRIG-B wiring requirements for IEDs. Phasor Measurement Unit (synchrophasor) according to IEEE C37.118 (2011) and IEC61850-90-5 directly streamed from your protective device. Reduce system event analysis effort by supporting embedded high-end and extended recording functionality. Enhanced CT/VT module diagnostics verify analog signal integrity using an advanced algorithm. APPLICATIONS: ... (read more)Browse Protective Relays and Monitoring Relays Datasheets for GE Digital Energy -
Marsh Bellofram Group of Companies
Universal Three-Phase Monitor Relay Series The ATC Diversified Electronics Division (ATC) of Marsh Bellofram Corporation (www.marshbellofram.com), a member of the Marsh Bellofram Group of Companies, has introduced the SLU-100 series, a family of universal monitor relays, designed to provide cost-effective protection against premature equipment failure or downtime caused by voltage faults or untimely outages on three-phase systems (Delta and Wye), such as those typically found in motor control centers or other critical motor and pump... (read more) -
Marsh Bellofram Group of Companies
Low-Cost Multi-Function Time Delay Relay The Automatic Timing & Controls division (ATC) of Marsh Bellofram Corporation (www.marshbellofram.com), a member of the Marsh Bellofram Group of Companies, has announced the recent introduction of the Model MTA-91H, a low-cost, fully configurable multi-function timer and time delay relay, designed for use within a variety of OEM and DIN rail package applications. With ten configurable timing modes, selectable time ranges from 0.1 seconds to 10 days and 16A rate output contacts, the model... (read more) -
SMC International
PTE-50-CET Three Phase Relay Test Set. setting. (Closed Case Calibration). In summary, the PTE-50-CET is an equipment which offers all the characteristics and functions needed for protective relay testing, in a manual or automatic mode, and in laboratory and/or for on site testing. APPLICATIONS. - Testing of three phase motor protection relays. - Testing of three and single phase overcurrent and differential protection relays. - Can be used as a complete single phase unit in voltage, current, and phase as outputs are reversible (V, I, j... (read more)Browse Relay Test Equipment Datasheets for SMC International
Conduct Research
...durability. Please also refer to the. conditions in the data sheet. Switching inductive and/or capacitive loads create. voltage and/or current peaks, which may damage the. relay. Please provide protective circuits. Please also consider external magnetic. fields caused by a too high packing density...
...can produce unacceptably high-voltage transients when the device is deenergized. Protective circuits can reduce the transients to an acceptable level, but they delay relay drop out as well. Relays also can be a source of EMI. Arcs at the contacts, for example, are produced when...
...of high-speed communication networks between plant control systems and typical electrical equipment found in an auxiliary electrical system. This paper also discusses the various methods available for communicating with protective relays, low voltage switchgear, electrical metering, and motor control...
protective relay to open the ac circuit if the motor operates too long without synchronizing. Synchronous motors require ac power during both starting and running, thus the main contactor is closed when the motor is operating. The dc winding of the rotor is energized by the field contactor as the motor...
...or phase-to-phase fault. The potential for an arc flash incident can be caused by the presence of arcing, tracking or corona in energized electrical equipment. Often these conditions occur in enclosed cabinets. Checking out enclosed systems can prove challenging due to the type of protective gear...
...power to machines by eliminating separate power supply enclosures and simplifying power supply wiring. Typical 24 Vdc supplies used for field power are designed to be used in a protective enclosure. SolaHD's new SCP-X power supply comes in an environmentally-sealed, machine-mountable 5.4" x 7" x 1.8...
...components, causing thermal damage to. an entire installation. insulation and other system components. As a result, it is vitally important that there is at least a basic. Overcurrent protective devices must disconnect circuits and. understanding of how motors and their related electrical. equipment...
...are marked with a. the control panel can safely withstand without excessive. SCCR (formerly known as withstand rating). Overcurrent. damage. If the available fault current of the electrical system. protective devices such as fuses and circuit breakers are. where the panel is installed exceeds the SCCR...
...classifications, personal protective equipment (PPE), arc flash boundaries, and more. ADVERTISEMENT. Hotter Than the Sun. Figure 1: Arc flash explosions can be as hot as 35,000 F, and can send shrapnel and molten metal flying out from equipment. Source: Hoffman. Push Back on OEMs. Because it is the factories...
...industry. After the assessment is completed, appropriate Personal Protective. Equipment (PPE) must be worn while working on or near exposed energized electrical components. Contractors and Utilities must comply in order to prevent injuries and avoid compliance fines. WHAT IS ARC FLASH?. Arc Flash...
Engineering Web Search: Protective Relay Distributors
IEEE SA - C37.90.1-1989 - IEEE Standard Surge Withstand...
C37.90.1-1989 - IEEE Standard Surge Withstand Capability (SWC) Tests for Protective Relays and Relay Systems
IEEE SA - Power and Energy Standards
Distributors & Resellers Visit the Main Find Standards Page
Westinghouse Motor protection relay datasheet and application...
T&R Test Equipment : Welcome
micro ohmmeters, ductor, low resistance measurement, relay test equipment, protective relay test, high current test equipment, primary injection,
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See Newark / element14 Profile & Catalog
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100 mA RMS. ? High current triac driver AGENCY APPROVALS ? Solid state relay ? UL1577, file no. E52744 system code H or J, double ? Switch small AC
See Newark / element14 Profile & Catalog
Sensors, Monitors and Protective Relays - catalog 1308242...
Catalog 1308242 Issued 3-03 SENSORS, MONITORS & PROTECTIVE RELAYS Alphanumeric Index Series Type Page Circuit Breakers ........................
Relays & Optocouplers
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