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Description: and individuals worldwide. Your shipping costs will be reflected on your shopping cart at the time of order but we do offer inexpensive or free ground shipping to the continental USA on most orders. Need to get rid of some of your old inventory? New or used, current or old, you can make money as well as go
Supplier: Duncan Instruments Canada, Ltd.
Description: Protection Relay GFR-3 works with Zero Sequence Current Transformer (Sensor). When the Ground Fault occurs, the Sensor sends the signal to trip GFR-3 relay. DPDT output contacts are provided to operate breakers, annunciators or other devices. GFR-3 can operate with any Sensor supplied by Skymatic
- Mounting: Other
- Supply Voltage Range: 115 volts
Ground Fault Relays - PGR-6100-120 - PGR-6100 Series - Ground Fault & Inspection Relay -- PGR-6100-120 - PGR-6100 Series
Description: The PGR-6100 Ground-Fault & Insulation Relay is designed to provide basic protection for a motor, including groundfault protection and insulation monitoring. The fact that the PGR-6100 has predictive as well as protective capabilities makes it unique. The ground-fault current and insulation
Description: Operates on AC solidly grounded and AC resistance grounded systems. The SELCO T2800 has a broad application as an earth fault - or single phase over current detection relay, it has a wide setting range for protection, control or monitoring. The relay detects the magnitude of the current
- Power Supply: AC Power Supply
- Supply Voltage Range: 230 volts
Description: The EL731 AC/DC Sensitive Earth-Leakage Relay is a revolutionary new product that finally solves common ground-fault problems associated with variable frequency drives and is equally applicable to AC, DC and mixed AC/DC systems. It detects a wide range of earth-leakage currents and can reliably
- Mounting: Panel
- Power Supply: AC Power Supply
- Features: Visual Indicator
- Operating Temperature: -4 to 158 F
Supplier: Weschler Instruments
Description: Fixed or selectable setpoint Solid-state or relay output Green LED Power-On indication Detects ground fault (earth leakage) conditions by monitoring all current carrying conductors in a grounded single or three phase system.
- Power Supply: AC Power Supply, DC Power Supply
- Supply Voltage Range: 19.2 to 132 volts
- Current Trigger Range: 0.0050 to 0.9500 amps
- Features: Automatic Reset, Visual Indicator
Description: , Pneumatic, Motion, Electronic, Hydraulic, HVAC and Electrical Control Equipment for plant floor and facilities maintenance machinery. Your shipping costs will be reflected on your shopping cart at the time of order but we do offer inexpensive or free ground shipping to the continental USA on most orders
- Supply Voltage Range: 120 to 240 volts
Supplier: CARLO GAVAZZI Automation Components
Description: The DMPU is a modular electronic motor protection relay to control, monitor and protect the performance of 3-phase constant or dual speed, AC induction motors. The DMPU device measures electrical motor variables (voltage, current, harmonic distortion, power, energy and earth leakage current
- Mounting: Panel, Other
- Supply Voltage Range: 690 volts
Description: Finding the exact piece of equipment you need for your maintenance and automation needs can feel like a wild goose chase. Fortunately, you've found a great place for even the most specific needs, including SQUARE D GC-200D.At PLCCenter.com, we stock New and Surplus Industrial MRO products for
Description: Options: Line powered at 170-264 Vac, 323-528 Vac, 489-660 Vac. Separate source single phase control power at 93.5-132 Vac Motor Protection: Thermal overload; Jam/stall protection; Current level alarming; Current unbalance; Current phase loss; Ground fault; Phase reversal; Over voltage, Under voltage
- Mounting: DIN Rail
- Power Supply: AC Power Supply
- Supply Voltage Range: 489 to 660 volts
- Current Trigger Range: 2 to 9 amps
Description: The C440/XT Electronic Overload Relay delivers enhanced motor protection and communications capabilities in a single compact device, directly monitoring motor current in each phase. Thermal modeling is performed electronically with precision solid-state components. Electronics accurately identify
- Mounting: DIN Rail, Panel
- Current Trigger Range: 0.3300 to 140 amps
- Features: Visual Indicator
- Safety Ratings and Approvals: RoHS Compliant
Protective Relays and Monitoring Relays - SOLID STATE OVERLOAD RELAY,INTEGRATED I/O, 4 INPUTS 2 OUTPUTS, LOW-LEVEL GROUND FAULT PROTECTION, PTC THERMISTOR MONITORING,9-45A -- 592EC2DC
Description: and Electrical Control Equipment for plant floor and facilities maintenance machinery. Your shipping costs will be reflected on your shopping cart at the time of order but we do offer inexpensive or free ground shipping to the continental USA on most orders. Need to get rid of some of your old inventory
Supplier: Fairchild Semiconductor
Description: The RV4145A is a low power controller for AC outlet ground fault interrupters. These devices detect hazardous grounding conditions, such as equipment (connected to opposite phases of the AC line) in contact with a pool of water and open circuits the line before a harmful or lethal shock occurs
- Mounting / Packaging: Through-Hole, Other
- Standards and Certifications: UL
Supplier: Eagle Eye Power Solutions, LLC
Description: The Eagle Eye GFM-100 Ground Fault Monitor is an easy-to-use, inexpensive & real-time solution for monitoring battery ground faults. The GFM-100 works for 24V, 48V, 125V and 250V applications, and reads battery bus status, detects out-of-limit conditions, and provides alarm indications per user
- Form Factor: Panel / Rack Mount Tester
- Test Capability: Voltage, Resistance
- Input Voltage: 30 to 125 volts
- Operating Temperature: 32 to 131 F
Description: Features: For Relaying or Metering High Relay class Models UL Recognized Window !.D. - 7.31" Applications: Over or Under Current Relays Metering Ability to drive longer wire runs Zero-Sequence Ground Fault Relays
- Transformer Category: Current Transformer
- Type / Applications: ANSI Class, Toroidal / Window, Electronics Applications, Other
Supplier: Eagle Eye Power Solutions, LLC
Description: for Protection System Station DC Supply Monitoring Devices and Systems" with no maximum maintenance interval. The NERC Battery Monitoring System includes: BQMS Battery Monitoring System ELM-Series Electrolyte Level Monitor GFM-100 Battery Ground Fault Monitor BQMS Battery Monitoring System The BQMS
- Form Factor: Test Module / Sub-system
- Test Capability: Charge
- Operating Temperature: 32 to 149 F
- Current Test Range: 0.0 to 1000 amps
Supplier: Euchner-U.S.A., Inc.
Description: 230V Automatic, manual, or monitored start selectable Ground fault monitoring Short circuit monitoring Up to safety category 4 To stop category 0 or 1 power ON troubleshooting
- Maximum Current: 10 amps
- Maximum AC Switching Voltage: 250 volts
- Maximum DC Switching Voltage: 50 volts
- Maximum AC Switching Power: 2000 VA
Standards and Technical Documents - C37.101-2006 - IEEE Guide for Generator Ground Protection -- 10.1109/IEEESTD.2007.4384312
Description: ground protection principles that have evolved with the use of new technologies in relay designs. Additional application examples are included, and other issues raised by the users are also addressed. The guide is not intended for the selection of generator or ground connection schemes.
Description: Solid State Relay Output Rated 30 Amps or Two-Pole Contactor Control Output Universal Inputs NEMA 4/4X Enclosure Ground Fault Alarm/Trip Monitor or GFI Circuit Breakers cULus
Description: the A4BY to pass normal current surges and to coordinate with ground fault relays.
- Fuse Type: Blade Type
- Voltage Rating: 600 volts
- Current Rating: 6000 amps
- Approvals / Standards: UL Approval, CSA Certification, IEC (UMF) Approval
I/O Modules and Instruments - NI PCI-6528 Industrial, 24 DI, 24 DO, Ch-Ch Isolated DIO; NI-DAQ -- 778833-01Supplier: National Instruments
Description: currents up to 150 mA. Because PCI-6528 boards are isolated, you can protect your system from noise and spikes on external signals and break ground loops. Using programmable power-up states, you can configure the initial output states in software, to ensure glitch-free, safe operations when connected
- Digital I/O Channels: 24
- Isolation: Channel-to-Channel Isolation, Isolated Digital Input, Isolated Digital Output
- Form Factor: Modular Bay / Slot System
- Computer Bus: PCI
Description: on your shopping cart at the time of order but we do offer inexpensive or free ground shipping to the continental USA on most orders. You can also REDUCE warehousing costs, REDUCE aging inventory & OPTIMIZE warehouse space by selling us your unwanted inventory to recondition and resell. If you'd like
Supplier: Digi-Key Electronics
Description: REL AC GROUND FAULT SENS 120VAC
Description: that are offered to you at an exceptional value. Your shipping costs will be reflected on your shopping cart at the time of order but we do offer inexpensive or free ground shipping to the continental USA on most orders. We will also buy used or surplus equipment that you are looking to sell. Most
Supplier: National Instruments
Description: fault buses, each of which offers a multiplexer with four possible inputs. You can use this architecture to simulate open or interrupted connections as well as shorts between pins, shorts to battery voltages, and shorts to ground on a per-channel basis. When controlled with the NI LabVIEW Real-Time
- Technology: PXITM Compliant
- Form Factor: 3U
- Switch Type: Relay Switch
- Maximum AC Switching Voltage: 150 volts
Description: Standard NEMA 4 Enclosures NEMA 4X Stainless Steel Enclosure Option Hand/Off/Auto Selector Switch 15, 25, 30, and 40 Amp Single-pole and Double-pole 30 mA Ground Fault Thermal-Magnetic Circuit Breakers See Catalog Page PDF for more information
- Panel Type: Other
- Length: 10 inch
- Width: 36 inch
- Current: 100 to 225 amps
Supplier: ValueTronics International, Inc.
Description: Fault Interrupt) is designed to protect operator's safety when abnormal ground current (A2-A1) occurs. The Hipot Analyzer provides high withstand voltage testing and analysis for optical couplers, HV relays, HV switches and PV modules, which have better insulation capability. Charge and discharge
Industrial Metal Detectors - APEX 100, 200 x 125 mm - Thermo Scientific APEX 100 Metal Detector, with 200 mm width x 125 mm height aperture -- EW-20039-17Supplier: Cole-Parmer
Description: available. Easily customize your metal detector with additional accessories such as MODBUS communications modules, field compression flanges, remote control mounting kit, alarm/fault warning lights and horn, and photo eyes for product inspection trigger. Note: To ensure proper aperture clearance
- Detector Type: In-Line / Conveyed Media
- Speed / Velocity: 0.3400 to 660 in/sec
- NEMA / IP Enclosure: Yes
Solid State Power Controllers (SSPC) - Double Pole Solid State Remote Power Controller -- E-1071-623/627Supplier: E-T-A Circuit Breakers
Description: and extending the life of the loads. The double pole electronic switching output prevents inadvertent start-up or dangerous machine movements as may arise upon a ground fault in systems with ungrounded power supply (‘IT systems’) (see EC Machinery Directive or EN 60204 part 1 "Safety
- SSPC Type: DC Controller
- Mounting: DIN Rail
- Maximum Load Current: 3.1 amps
- Operating Temperature: 32 to 140 F
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Duncan Instruments Canada, Ltd.
GFR Series Ground Fault Relays from Duncan Inst.
The GFR Series relays protect industrial electrical equipment such as motors, transformers and feeders, against the damage caused by low magnitude ground currents. GFR-2/3 work effectively on both high and low resistance grounded distribution systems. The package consists of: Ground Fault Protection Relay and Zero Sequence Current Transformer. GFR-2. Technical Information. Power Supply: 115AC + 10% - 20%, 50/60Hz, 3VA. Tripping Range: See Ordering Information. Output Contacts: DPDT, 3A @ 115VAC... (read more)
Browse Ground Resistance Testers Datasheets for Duncan Instruments Canada, Ltd.
Molex displays Ground Fault Circuit Interrupters
and industrial applications, at booth 612. Available in both permanent –mount and portable versions, they provide secure ground-fault protection wherever and whenever personnel and equipment are at risk. “Ground faults can pose significant workplace hazards, such as shock and electrocution, ” said Tony Quebbemann, product manager, Molex. “GFCIs protect workers reliably and safely wherever portable power or power cords are used. When used properly, Woodhead Super-Safeway... (read more)
Browse Ground Fault Circuit Interrupters (GFCI) Datasheets for Molex
Ground Detection Voltmeter
to ground on either side of the battery causes the meter to move off center, indicating both the severity of the fault and which side it is on. The resistor value is selected so that a direct short to ground reads the full voltage. A digital bargraph meter will easily replace the analog meter in this circuit, often mounting in the same panel cutout. The bargraph meter provides both a digital readout and a highly visible bar to indicate a fault situation. To help spot a problem more quickly... (read more)
Browse Digital Bargraphs Datasheets for Weschler Instruments
Safety Controllers and relays
is actuated and depending on the model, are capable of detecting the following types of potential safety circuit faults: Welded interlock/E-stop switch contacts. Open circuits, short circuits or ground faults. Faults in the modules safety relays. Faults in the modules monitoring circuits. Inadequate supply voltage. Welded/stuck contacts in the controlled output motor contactor/control relay. Capacitive/inductive interference on controller inputs. Specialized versions are also available for double... (read more)
Browse Safety Relays Datasheets for Schmersal Inc.
Safety Relays ESM-F
Modular Design. Flexible from Basic Module with Your Design Changes. No Programming. Interconnection of Safety Groups Can Switch Up to 8 Amps. Status LED's with Inputs and Outputs. As Required by NFPA Machine Safety Standard As Required by EN954,EN60204-1. Technical. Open Vts Available (24VTDC,24V) Reset. Automatic, Manual, Or Monitored Start Selectable. Ground Fault Monitoring. Short Circuit Monitoring. Up To Safety Category 4. To Stop Category 0 Or 1 Power ON Troubleshooting Applications... (read more)
Browse Safety Relays Datasheets for Euchner-U.S.A., Inc.
Allen-Bradley / Rockwell Automation
Flexible, Modular Electronic Overload Relay
fault-sensing capabilities, as well as direct contactor mount, panel mount and pass-through styles. The module provides voltage, current, power (kW, kVAR and kVA), energy (kWh, kVARh, kVAh, kW Demand, kVAR Demand and kVA Demand), and power quality (power factor, frequency and phase rotation) information at the motor level. . The E300 overload relay ’s native dual-port EtherNet/IP option simplifies network wiring. It allows E300 overload relays to be efficiently daisy-chained... (read more)
Browse Electromechanical Relays Datasheets for Allen-Bradley / Rockwell Automation
Current Transformers for Relaying or Metering
Relay and Meter Class Current Transformer model 143. Applications: Over or Under Current Relays. Metering. Ability to drive longer wire runs. Zero-Sequence Ground Fault Relays. Features: For relaying or metering. High Relay Class Models. UL Recognized. Window I.D. - 7.31". FLEX-CORESOLID CORE CURRENT TRANSFORMERS. Solid Core. Current Transformer. Flex-Core. Specialists in Measurement, Monitoring, Recording and Control of Current, Power and Energy. Flex-Core's technology allows them to produce... (read more)
Browse Current Transformers Datasheets for FLEX-CORE
SE-330 Series Neutral-Grounding-Resistor Monitors
A microSD ™ card is included. Programmable ground-fault pickup setting. to expand the setting range. New Ethernet communication options,. including IEC 61850 protocol support and dual. wired or fiber connections. Note: All Profibus models will be discontinued when component inventory is depleted, with an expected Sept. 30, 2014 obsolescence date. For ordering information and expected product release dates on the new SE-330 Series models, click on the Product Change Notice (PCN... (read more)
Browse Protective Relays and Monitoring Relays Datasheets for Littelfuse, Inc.
Dart Controls, Inc.
Micro-Drive PLUS DC Drive/ Process Controller
Dart Controls Inc. breaks new ground by integrating a programmable display, DC motor control, and PID controller into one package - the MD PLUS Series. The MD PLUS integrated design saves installation cost, panel space and in many applications switches, relays, timers and other discrete devices. The MD PLUS is a field-programmable closed loop DC drive system employing an advanced velocity-form PID algorithm for accurate motor or process loop control. The isolated 4-20mA input and output... (read more)
Browse DC Motor Drives Datasheets for Dart Controls, Inc.
Expanding capacity for customelectrical equipment
become a market leader in the engineering and manufacturing of high-quality custom power-distribution equipment designed to be used in these rugged conditions. In addition to custom-built power-distribution centres, the company manufactures control panels, power centres, mining machine controls, e-houses, ground-fault-protection equipment, and other custom-engineered modules for protection and control. . "Littelfuse Startco has always supported the mining industry through the development... (read more)
Browse Surge Protective Devices (SPDs) Datasheets for Littelfuse, Inc.
Conduct Research Top
Ground-fault circuit interrupters (GFCIs), also called earth leakage or residual-current circuit breakers, can sense leakage current to earth ground from live parts and interrupt the circuit automatically when leakage current exceeds a predetermined value. A core-balance protection device serves
Secure Power with Next Generation SPDUs (.pdf)
Computer-controlled advances in avionics, such as fly by wire, along with added onboard electrical features, including in-seat, passenger entertainment systems, are boosting electrical demand on board aircraft. Standard thermal circuit breakers and relay systems are carrying ever more current-dense
Medical Device Link .
crucial elements, such as measuring devices and fault-simulating relays, and explains the various subtests involved at each step. The line leakage test, also known as the touch current test, is most commonly specified by safety agencies to be performed on all electrical products in two different
Medical Device Link .
piece of medical equipment, " Millican says. The 266 can carry out load, insulation, IEC lead, ground continuity, ground leakage, enclosure leakage, patient leakage, and patient auxiliary current tests. The device offers true RMS leakage measurements, automatic testing of single-fault conditions
More Information Top
IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems
1) Inverse time overcurrent phase and ground fault relays (Devices 50/51 and 50N/51N) are used whenever possible because of simplicity and economy.
IEEE Guide for AC Generator Protection - Redline
c) If a bus ground fault relay , device 59BN (see Figure 7-4, for example), is used to protect the section of bus between the generator and the unit step-up transformer, the voltage relay should also be coordinated with it.
IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems - Redline
This transformer will act as a short circuit to third harmonic currents, and without cancellation of third harmonic voltage, the resultant current may adversely affect ground fault relaying and generator capacity.