Overcurrent Relay
2009
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 Power Management Digital SA Time Overcurrent Relay Protection DIFCA5B $248.98 Time Remaining: 19d 14h 50m Buy It Now for only: $248.98 |
 SEL 501 2 Dual Overcurrent Relay $150.00 Time Remaining: 4d 11h 9m |
 WESTINGHOUSE OVERCURRENT RELAY CO 11 1875301A $129.00 Time Remaining: 24d 17h 13m Buy It Now for only: $129.00 |
 Schweitzer Engineering Sel 501 Dual Universal Overcurrent Relay $175.00 Time Remaining: 29d 10h 54m Buy It Now for only: $175.00 |
 ABB MMCO Overcurrent relay 3 phase 5 amp uP controlled $239.73 Time Remaining: 19d 9h 36m Buy It Now for only: $239.73 |
 WESTINGHOUSE OVERCURRENT RELAY 288B715A14A TYPE CO 6 $200.00 Time Remaining: 22d 12h 10m Buy It Now for only: $200.00 |
 FPE SD 3I Overcurrent Relay Unit WOW $199.99 Time Remaining: 22d 12h 33m Buy It Now for only: $199.99 |
 5V 30A Optocoupler Isolated Relay Module with Diode over current protection $5.85 Time Remaining: 18d 19h 12m Buy It Now for only: $5.85 |
 FPE USR 3IR Overcurrent Relay Unit WOW $299.99 Time Remaining: 22d 12h 33m Buy It Now for only: $299.99 |
 General Electric Time Overcurrent Relay 12IAC53A801A $200.00 Time Remaining: 23d 10h 59m Buy It Now for only: $200.00 |
 WESTINGHOUSE 265C047A05 OVERCURRENT RELAY CO 11 USED $345.00 Time Remaining: 2d 13h 11m Buy It Now for only: $345.00 |
 NEW WESTINGHOUSE OVERCURRENT RELAY 60 CYCLES 4 15A NA90184 3A $174.99 Time Remaining: 16d 7h 21m Buy It Now for only: $174.99 |
 VINTAGE GENERAL ELECTRIC GE TIME OVER CURRENT RELAY IA 201 METER $75.00 Time Remaining: 1d 18h 37m Buy It Now for only: $75.00 |
 GENERAL ELECTRIC TIME OVERCURRENT RELAY12IAC53B811AVERY INVERSE $95.00 Time Remaining: 26d 8h 39m Buy It Now for only: $95.00 |
 ABB Circuit Shield Overcurrent Relay Catalog 443P1202 $125.00 Time Remaining: 18d 13h 27m Buy It Now for only: $125.00 |
 12V 30A Optocoupler Isolated Relay Module with Diode over current protection $5.88 Time Remaining: 18d 19h 17m Buy It Now for only: $5.88 |
 BUSSMANN OPTIMA OPM SW OVERCURRENT PROTECTOR 3PH 600V $10.49 Time Remaining: 10h 55m Buy It Now for only: $10.49 |
 GE GENERAL ELECTRIC 12IJCV51A1A TYPE IJCV OVERCURRENT RELAY VOLTAGE 115V 55263 $69.99 Time Remaining: 17d 13h 36m Buy It Now for only: $69.99 |
 NEW GENERAL ELECTRIC TIME OVERCURRENT RELAY 12IAC53B803A $349.99 Time Remaining: 16d 6h 57m Buy It Now for only: $349.99 |
 Overcurrent Protection 2NO 2NC 18 26A Range Thermal Overload Relay $19.90 Time Remaining: 6d 12h 38m Buy It Now for only: $19.90 |
 NEW WESTINGHOUSE OVERCURRENT RELAY C0 2H1101N $174.99 Time Remaining: 16d 7h 42m Buy It Now for only: $174.99 |
 NEW WESTINGHOUSE DIRECTIONAL OVERCURRENT RELAY CR 93 1500 NA 82603 1 $599.99 Time Remaining: 16d 11h 24m Buy It Now for only: $599.99 |
 WESTINGHOUSE CO 8H1111N OVERCURRENT RELAY $200.00 Time Remaining: 15d 15h 5m Buy It Now for only: $200.00 |
 GE TIME OVERCURRENT RELAY 12IAC66A3A GEI 28818 $70.00 Time Remaining: 24d 12h 31m Buy It Now for only: $70.00 |
 BASLER BE1 51 OVERCURRENT RELAY $163.00 Time Remaining: 29d 13h 29m Buy It Now for only: $163.00 |
 NEW WESTINGHOUSE OVERCURRENT RELAY CR 8 288B574A12 $229.99 Time Remaining: 16d 10h 11m Buy It Now for only: $229.99 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 4 6A $17.45 Time Remaining: 11d 2h 11m Buy It Now for only: $17.45 |
 Overcurrent Protection 2NO 2NC 18 26A Range Thermal Overload Relay $19.27 Time Remaining: 2d 3h 35m Buy It Now for only: $19.27 |
 GE GENERAL ELECTRIC TYPE IAC 51B3A 121AC51B3A TIME OVERCURRENT RELAY 05 2A AMP $55.41 Time Remaining: 2d 13h 33m Buy It Now for only: $55.41 |
 NEW WESTINGHOUSE OVERCURRENT RELAY 4 12A 1875223A $174.99 Time Remaining: 16d 7h 31m Buy It Now for only: $174.99 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 4 6A $15.01 Time Remaining: 1d 31m Buy It Now for only: $15.01 |
 ANAM EOCR SS 60R ELECTRONIC OVER CURRENT RELAY NIB $26.69 Time Remaining: 7d 13h 13m Buy It Now for only: $26.69 |
 GE 12IFC66BD1A Long Time Overcurrent Relay Used $149.95 Time Remaining: 25d 13h 26m Buy It Now for only: $149.95 |
 OMRON J7T E170 OVER CURRENT RELAY DC12 24V NEW $34.99 Time Remaining: 27d 23h 14m Buy It Now for only: $34.99 |
 SAMWHA EOCR SE 05 ELECTRIC RELAY OVERCURRENT 110 220V NEW IN BOX $40.00 Time Remaining: 17d 7h 15m Buy It Now for only: $40.00 |
 GE IAC 53A803A OVER CURRENT RELAY NEW IN UNOPENED BOX $99.99 Time Remaining: 28d 13h 51m Buy It Now for only: $99.99 |
 Schweitzer SEL 351 035161H42542XX Directional Overcurrent Relay SEL351 Reclosing $2,300.00 Time Remaining: 11d 6h 59m Buy It Now for only: $2,300.00 |
 SAMWHA EOCR SE 05 ELECTRIC RELAY OVERCURRENT 90 260V NEW IN BOX $35.00 Time Remaining: 17d 7h 14m Buy It Now for only: $35.00 |
 NEW WESTINGHOUSE DIRECTIONAL OVERCURRENT RELAY 115V 5A COIL 1A CR021706 $499.99 Time Remaining: 16d 6h 57m Buy It Now for only: $499.99 |
 NEW GENERAL ELECTRIC INSTANTANEOUS OVERCURRENT RELAY 12PJC31J45A $274.99 Time Remaining: 16d 7h 51m Buy It Now for only: $274.99 |
 Wilmar Electronics overcurrent relay Model1200 5X $150.00 Time Remaining: 15d 11h 36m Buy It Now for only: $150.00 |
 NEW GENERAL ELECTRIC TIME OVERCURRENT RELAY 12NGV19A2A $299.99 Time Remaining: 16d 7h 26m Buy It Now for only: $299.99 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 24 36A $19.75 Time Remaining: 5d 13h 25m Buy It Now for only: $19.75 |
 MCGG Single Phase Overcurrent Relay MCGG22D1CD0753B $195.00 Time Remaining: 5d 21h 16m Buy It Now for only: $195.00 |
 OMRON J7T E141 1 OVER CURRENT RELAY J7T J7TE1411 NIB $32.00 Time Remaining: 29d 8h 53m Buy It Now for only: $32.00 |
 NEW ASEA BROWN BOVERI CIRCUIT SHIELD OVERCURRENT RELAY 120V 50 60HZ 93 3826 $139.99 Time Remaining: 16d 9h 10m Buy It Now for only: $139.99 |
 2 GE General Electric IAC Time Overcurrent Relay 12IAC66K37A $225.00 Time Remaining: 23d 6h 22m Buy It Now for only: $225.00 |
 GE 12IAC53A803A IAC 53A803A OVERCURRENT RELAY NIB $219.00 Time Remaining: 7d 6h 55m Buy It Now for only: $219.00 |
 GENERAL ELECTRIC THERMAL OVERCURRENT RELAY 12TMC11B4A $150.00 Time Remaining: 26d 11h 41m Buy It Now for only: $150.00 |
 Omron J7T E170 1 Overcurrent Relay 12 24vdc 05 175a $37.00 Time Remaining: 16d 7h 46m Buy It Now for only: $37.00 |
 GE GENERAL ELECTRIC 12IFC77A2A EXTREMELY INVERSE TIME OVERCURRENT RELAY $499.95 Time Remaining: 28d 16h 31m Buy It Now for only: $499.95 |
 GE Time Overcurrent Relay Model 12IAC51B4R IAC $125.00 Time Remaining: 23d 21h 46m Buy It Now for only: $125.00 |
 Overcurrent Protection Three Phase Thermal Overload Relay 54 75A $27.03 Time Remaining: 12d 13h 29m Buy It Now for only: $27.03 |
 ABB Circuit Shield Overcurrent Relay Catalog 443s1291 $150.00 Time Remaining: 11d 11h 12m Buy It Now for only: $150.00 |
 Overcurrent Protection Three Phase 34 50A Range Thermal Overload Relay $26.92 Time Remaining: 7d 22h 31m Buy It Now for only: $26.92 |
 Schweitzer SEL 167 Overcurrent Relay Fault Detector $699.95 Time Remaining: 20d 16h 11m Buy It Now for only: $699.95 |
 GE 12IAC53B811A Time Overcurrent Relay Very Inverse 15 12A General Electric IAC $470.00 Time Remaining: 4d 7h 22m Buy It Now for only: $470.00 |
 Overcurrent Protection 2NO 2NC 18 26A Range Thermal Overload Relay $19.77 Time Remaining: 13h 47m Buy It Now for only: $19.77 |
 Overcurrent Protection 2NO 2NC 18 26A Range Thermal Overload Relay $19.78 Time Remaining: 1d 18h 47m Buy It Now for only: $19.78 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 24 36A $20.61 Time Remaining: 7d 17h 54m Buy It Now for only: $20.61 |
 Overcurrent Protection Three Phase 7 10A Setting Range Thermal Overload Relay $15.20 Time Remaining: 7d 10h 42m Buy It Now for only: $15.20 |
 BASLER BE1 50 INSTANTANEOUS OVERCURRENT RELAY USED $195.30 Time Remaining: 5d 16h 14m Buy It Now for only: $195.30 |
 Carlo Gavazzi EII C 230 5 A Over Current Metering Relay $62.66 Time Remaining: 18d 9h 39m Buy It Now for only: $62.66 |
 Overcurrent Protection Three Phase Thermal Overload Relay 54 75A $27.02 Time Remaining: 11d 18h 38m Buy It Now for only: $27.02 |
 Overcurrent Protection Three Phase Thermal Overload Relay 54 75A $26.93 Time Remaining: 12d 9h 23m Buy It Now for only: $26.93 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 24 36A $19.92 Time Remaining: 7d 19h 53m Buy It Now for only: $19.92 |
 Wilmar Electronics overcurrent relay ModelWCT1 26DC 5 $150.00 Time Remaining: 26d 10h 32m Buy It Now for only: $150.00 |
 Overcurrent Protection 2NO 2NC Thermal Overload Relay 063 1A $15.18 Time Remaining: 2d 6h 5m Buy It Now for only: $15.18 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 4 6A $15.51 Time Remaining: 2d 2h 28m Buy It Now for only: $15.51 |
 Overcurrent Protection Three Phase 34 50A Range Thermal Overload Relay $26.94 Time Remaining: 2d 5h 36m Buy It Now for only: $26.94 |
 Overcurrent Protection Three Phase 9 13A Thermal Overload Relay $15.23 Time Remaining: 6d 10h 8m Buy It Now for only: $15.23 |
 Wilmar Overcurrent Relay Model WCT1 120AC 10 $149.99 Time Remaining: 20d 14h 30m Buy It Now for only: $149.99 |
 ABB 1SVR4501121R0100 OVERCURRENT AC DC RELAY $65.00 Time Remaining: 29d 12h 51m Buy It Now for only: $65.00 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 24 36A $19.75 Time Remaining: 9d 2h 2m Buy It Now for only: $19.75 |
 Adjustable Overcurrent Protection Three Phase Thermal Overload Relay 4 6A $15.21 Time Remaining: 7d 7h 57m Buy It Now for only: $15.21 |
 Overcurrent Protection 2NO 2NC Thermal Overload Relay 063 1A $15.21 Time Remaining: 8d 11h 52m Buy It Now for only: $15.21 |
 Overcurrent Protection 2NO 2NC Thermal Overload Relay 063 1A $15.47 Time Remaining: 8d 23h 56m Buy It Now for only: $15.47 |
 Overcurrent Protection Adjustable Three Phase Thermal Overload Relay 25 4A $15.20 Time Remaining: 6d 11h 48m Buy It Now for only: $15.20 |
 Overcurrent Protection Three Phase 9 13A Thermal Overload Relay $17.47 Time Remaining: 4d 7h 7m Buy It Now for only: $17.47 |
 Overcurrent Protection Three Phase 63 85A Range Thermal Overload Relay $26.55 Time Remaining: 3d 15h 42m Buy It Now for only: $26.55 |
 Overcurrent Protection Three Phase 63 85A Range Thermal Overload Relay $26.68 Time Remaining: 8d 22h 34m Buy It Now for only: $26.68 |
 Overcurrent Protection Adjustable Three Phase Thermal Overload Relay 25 4A $15.02 Time Remaining: 2d 22h 32m Buy It Now for only: $15.02 |
 Overcurrent Protection Three Phase 7 10A Setting Range Thermal Overload Relay $15.50 Time Remaining: 2d 19h 30m Buy It Now for only: $15.50 |
 SEL 387 Current Differential Overcurrent Relay 110VDC $1,440.00 Time Remaining: 29d 20h 41m Buy It Now for only: $1,440.00 |
 Overcurrent Protection Three Phase 63 85A Range Thermal Overload Relay $26.53 Time Remaining: 7d 4h 47m Buy It Now for only: $26.53 |
 Overcurrent Protection Three Phase 7 10A Setting Range Thermal Overload Relay $15.05 Time Remaining: 2d 7h 3m Buy It Now for only: $15.05 |
 Overcurrent Protection Three Phase 2NO 2NC Thermal Overload Relay 1 16A $15.51 Time Remaining: 6d 22h 41m Buy It Now for only: $15.51 |
 Overcurrent Protection Three Phase 45 65A Range Thermal Overload Relay $26.83 Time Remaining: 2d 12h 26m Buy It Now for only: $26.83 |
 WESTINGHOUSE CO 8L1111N OVERCURRENT RELAY $200.00 Time Remaining: 15d 15h 8m Buy It Now for only: $200.00 |
 WESTINGHOUSE CO 9 STYLE 264C901A01 OVER CURRENT RELAY NEW IN BOX $199.99 Time Remaining: 24d 8h 3m Buy It Now for only: $199.99 |
 NEW GE 12HFA151A2H OVER CURRENT RELAY TYPE HFA 125V $300.00 Time Remaining: 26d 9h 39m Buy It Now for only: $300.00 |
 NEW WESTINGHOUSE OVERCURRENT RELAY 1875293A $99.99 Time Remaining: 18d 9h 39m Buy It Now for only: $99.99 |
 Overcurrent Protection Three Phase 2NO 2NC Thermal Overload Relay 1 16A $15.50 Time Remaining: 2d 6h 29m Buy It Now for only: $15.50 |
 GE 121AC77B34A Time Overcurrent Relay NO Housing $39.99 Time Remaining: 16d 14h 53m Buy It Now for only: $39.99 |
 Overcurrent Protection Three Phase 45 65A Range Thermal Overload Relay $26.82 Time Remaining: 1d 5h 22m Buy It Now for only: $26.82 |
 NIB ABB Overcurrent Relay Type Micro 51 Cat 446S1101 Circuit Shield NOS $89.95 Time Remaining: 18d 10h 20m Buy It Now for only: $89.95 |
 Overcurrent Protection Three Phase 5 8A Range Thermal Overload Relay $15.25 Time Remaining: 15d 7h 48m Buy It Now for only: $15.25 |
 ABB 6668D37A22 Time Overcurrent Relay KAB 200V 48 Amp Bus Differential 9643A69 $200.00 Time Remaining: 3d 10h 12m Buy It Now for only: $200.00 |
 ABB 293B301A22A Time Overcurrent Relay 02 2 Amp Type TD 5 48 125 VDC 05 4 Sec $225.00 Time Remaining: 4d 8h 29m Buy It Now for only: $225.00 |
 Overcurrent Protection 2NO 2NC 18 26A Range Thermal Overload Relay $20.63 Time Remaining: 2d 4h 6m Buy It Now for only: $20.63 |
Overcurrent Relay
Busbar Technology- A Brief History
The flexibility of bus bars have allowed an unlimited number of interconnection styles to choose from. Bushings, embossments, and faston tabs are most commonly used. Wire harnesses, solderable connectors, and pressed-in fittings are also integrated into the design, making a bus bar compatible with virtually any type of interface.
Up to the mid 1930′s, no widescale efforts had been made to protect busbars on a unit basis. Also there was reluctance in arranging one protective equipment to cause simultaneous tripping of a large number of circuits.
Before the British Grid System was built in the early 1930s, many undertakings ran isolated from adjacent ones, and so the power available for busbar faults was often relatively small, and damage due to these faults was generally not extensive.
By the late 1930′s, the British Power Systems were extensively interconnected, with a consequent increase in fault power.
A number of bus bar faults occurred about this time, but due to their relatively slow clearance from the system by overcurrent and earth-fault relays, considerable damage resulted, especially in indoor stations. These faults led to efforts being made to produce busbar protection in such a form that it could be widely applied without itself being a further hazard to the system.
Construction of the British 275 kV supergrid system began in about 1953, by which time standard principles of busbar protection had been adopted for outdoor switchgear at the higher voltages for power distribution.
At this time the emphasis was placed on the avoidance of unwanted operations in order to give maximum security of supply.
With the introduction of 400 kV substations in the 1960′s, the transient stability of generators became the more important consideration and this led to a change of emphasis so that fast operating times and reliable operation would be obtained for a fault occurring within the protected zone, which in this case would be the busbars and switchgear.
The modern distribution system begins as the primary circuit leaves the sub-station and ends as the secondary service enters the customer's meter socket. A variety of methods, materials, and equipment are used among the various utility companies, but the end result is similar. First, the energy leaves the sub-station in a primary circuit, usually with all three phases.
Traditionally, the electricity industry has been a publicly owned institution but starting in the 1970s, nations began the process of deregulation and privatization, leading to electricity markets. A major focus of these was the elimination of the former so called natural monopoly of generation, transmission, and electrical distribution. As a consequence, electricity has become more of a commodity. The separation has also led to the development of new terminology to describe the business units.
To learn more about busbars and their application today, visit www.busbar.com
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Where can I find info about electromechanical relay?
I am looking for information about overcurrent, directional and/or diferencial electromechanical information, like the construction or how do they work.
You are a bit vague. If you don't know exactly what you want then try Wikipedia first and come back here if you need to know more.
Overcurrent Relays
