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Ground-Fault Protection in VFDs

Ground-Fault Protection in VFDs (Variable Frequency Drives)Ground faults can be dangerous. A short to ground in a solidly-grounded system creates large currents that can damage equipment and cause a shutdown. A ground fault can also create an arc flash, which can cause serious injury to nearby personnel as well as damage to equipment.
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Introduction to Protection Relays

Introduction to Protection RelaysA protection relay is a smart device that receives inputs, compares them to set points, and provides outputs. Inputs can include current, voltage, resistance, or temperature.
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Arc-Flash Protection

Arc-Flash ProtectionArcing and arc flashes are uncontrolled, intense, luminous discharges of electrical energy that occur when electric current flows across what is normally an insulating medium. The most common cause of arc faults is insulation failure.
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Converting to a Resistance-Grounded System

Convert Ungrounded to Resistance-Grounded SystemsResistance grounding protects a system against transient overvoltages caused by intermittent ground faults and it provides a method to locate ground faults. (Transient overvoltages and inability to locate ground faults are the most common safety issues with ungrounded systems.)
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Current Transformer Application

Current Transformer ApplicationA current transformer is defined as a transformer that produces a current in its secondary circuit that is in proportion to current in its primary circuit.
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Littelfuse Glossary of Terms

Glossary of TermsRead more to use this reference tool for Littelfuse's Glossary of Terms.
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Ground-Fault Protection

Ground-Fault ProtectionA relay can have several ways of communicating that a decision has been made. Typically the relay will operate a switch (relay contact) to indicate that an input has surpassed a setting, or the relay can provide notification through visual feedback such as a meter or LED.
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Enhanced Overload Relays

Enhanced Overload RelaysLittelfuse Enhanced Overload Relays monitor line-side voltages to prevent starting equipment while fault conditions exist! Unlike standard thermal overload relays, which only protect against load-side faults, SymCom's 777 family of enhanced overload relays also act as "smart sensors" for incoming power lines.
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3 Easy Options For Enhanced Motor Protection

3 Easy Options For Enhanced Motor ProtectionWhy rely on a basic overload relay to protect your motors/pumps and processes? To ensure they stay up and running, here are three inexpensive options to consider for upgrading your electrical protection.
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Littelfuse New Industrial Relays, High-Speed Fuses Selected as Finalists for 2017 Product of the Year

MLittelfuse New Industrial Relays, High-Speed Fuses Selected as Finalists for 2017 Product of the Yeararking the third consecutive year Littelfuse products have been recognized in the program, the finalists qualified are: MP8000 Bluetooth Overload Relays, AF0100 Arc-Flash Relays and POWR-SPEED PSR High Speed Fuses.
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Alternating & Duplexing Relays

Alternating & Duplexing RelaysPower must be applied at all times. When the level in the tank rises to the normal level, the Lead Float Switch closes. Pump "A" is turned on via Pump "A" contactor, and will remain in this condition until the Lead Float Switch opens. When the Lead Float Switch opens, the ARP relay contacts transfer.
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Littelfuse Arc-Flash Relay Named Finalist for Plant Engineering Product of the Year

Littelfuse Plant Engineering AwardsLittelfuse, Inc., the global leader in circuit protection, announces that the AF0500 Arc-Flash Relay is a finalist for Plant Engineering’s 2015 Product of the Year Awards honoring outstanding achievements in innovative products for manufacturing.

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SymCom Inc. acquires SSAC

SymCom Acquires SSACSymCom Incorporated announced today that the owners of SymCom have acquired SSAC, a leader in low-voltage products, from ABB. SSAC Management and Employees will continue to operate from the Baldwinsville, NY facility as SSAC, LLC.

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