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  • Electricity/Electronics > Protection equipment > Relays > Static relays
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  • Electricity/Electronics > Protection equipment > Relays > Relay boards and accessories
  • Electricity/Electronics > Protection equipment > Relays > Control relays
  • Electricity/Electronics > Distribution > Tableaux de distribution électrique (translation in progress) > Electric boards
  • Electricity/Electronics > Protection equipment > Relays > Static relays
  • Electricity/Electronics > Protection equipment > Relays > Static relays
  • Electricity/Electronics > Protection equipment > Relays > Power relays
  • Electricity/Electronics > Protection equipment > Relays > Safety relays
  • Electricity/Electronics > Protection equipment > Relays > Differentials
  • Electricity/Electronics > Protection equipment > Relays > Reed relays
  • Electricity/Electronics > Protection equipment > Relays > Time-lag relays
  • Electricity/Electronics > Protection equipment > Relays > Relay boards and accessories
  • Electricity/Electronics > Protection equipment > Relays > Control relays
  • Electricity/Electronics > Distribution > Tableaux de distribution électrique (translation in progress) > Electric boards
  • Electricity/Electronics > Protection equipment > Relays > Static relays
  • Electricity/Electronics > Protection equipment > Relays > Static relays
  • Electricity/Electronics > Protection equipment > Relays > Power relays
  • Electricity/Electronics > Protection equipment > Relays > Safety relays
  • Electricity/Electronics > Protection equipment > Relays > Differentials
  • Electricity/Electronics > Protection equipment > Relays > Reed relays
  • Electricity/Electronics > Protection equipment > Relays > Time-lag relays
  • Electricity/Electronics > Protection equipment > Relays > Relay boards and accessories
  • Electricity/Electronics > Protection equipment > Relays > Control relays
  • Electricity/Electronics > Distribution > Tableaux de distribution électrique (translation in progress) > Electric boards
  • Electricity/Electronics > Protection equipment > Relays > Static relays
  • Electricity/Electronics > Protection equipment > Relays > Static relays
  • Electricity/Electronics > Protection equipment > Relays > Power relays
  • Electricity/Electronics > Protection equipment > Relays > Safety relays
  • Electricity/Electronics > Protection equipment > Relays > Differentials
  • Electricity/Electronics > Protection equipment > Relays > Reed relays
  • Electricity/Electronics > Protection equipment > Relays > Time-lag relays

See all sector categories "Electricity/Electronics"

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Relays
Control relays
Differentials
Static relays
Power relays
Safety relays
Threshold relays
Relay boards and accessories
Time-lag relays
Reed relays
Résistors (translation in progress)
Identifcations matériels électriques (translation in progress)
Disjoncteurs électriques (translation in progress)
Systèmes d'isolation électrique (translation in progress)
Parafoudres - Paratonnerres (translation in progress)
Dispositifs de coupure de courant (translation in progress)
Nettoyants - Protecteurs de matériels (translation in progress)
Contrôleurs de sécurité électrique (translation in progress)


Threshold relays :

12 products Flux RSS
HIGH VOLTAGE RELAYS - DELAYED OPEN/CLOSED - E40-NC-40-1-ZA

HIGH VOLTAGE RELAYS - DELAYED OPEN/CLOSED - E40-NC-40-1-ZA

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps High Voltage Delayed Open/Closed Relays High voltage relays with automatic delay but positive closing or opening after turn on, turn-off or loss of power. They are designed for safety shorting or current flow which must not be initiated or interrupted accidentally, before a prescribed time after actuation or shutdown. Typical E Series Delayed E40-NC-40-1-ZA 40KV PK Test 1-3 seconds delay to close >>>
View the product on rossengineeringcorp.com Ross Engineering
OVERLOAD RELAYS – TYPE RMP-111D

OVERLOAD RELAYS – TYPE RMP-111D

The protective overload relay type RMP-111D forms part of a complete DEIF series of relays for protection and control of generators, and is applicable to both marine and land-based installations. Features include: * Protection of prime mover * 3-phase measurement * LED indication of alarm condition * Timer-controlled tripping * LED indication for activated relay * 35 mm DIN rail or base-mounting The RMP-111D is type-approved by major classification societies and is applied for protection of the prime mover against overload. This is especially required if the prime mover is underdimensioned in proportion to the AC generator. >>>
View the product on deif.co.uk DEIF (UK) Ltd
HIGH VOLTAGE RELAYS - E SERIES 40KV-150KV - E40-DT-40

HIGH VOLTAGE RELAYS - E SERIES 40KV-150KV - E40-DT-40

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps E Series 40KV-150KV These highly reliable compact air insulated HV relays are used for HV transfer, safety grounding, tap selection and capacitor discharge at 40KV to 150KV PK test in air. They have fire-retardant epoxy glass laminate insulation with track resistant coating as well as heavy duty contacts to minimize corona and contact resistance. All models are also available with tungsten alloy contacts for high current capacitor discharge use. Basic units are designed to mount base down, other mounting positions must be specified. They can withstand high shock, vibration, and severe environmental conditions. One, two or more optional auxiliary SPDT contacts are also available for holding or indicating as follows: E40, 11A, 250V AC; E60, 15A, 250V AC and 1/2A, 125V DC; E100 and E150, 15A, 480V AC and 1/2A, 125V DC. Other auxiliary contact ratings are available. >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - E SERIES 70KV-300KV - E70-NC-70

HIGH VOLTAGE RELAYS - E SERIES 70KV-300KV - E70-NC-70

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps E Series 70KV-300KV Gravity Return, Mount Base Up For high voltage transfer, safety grounding, tap selection, or capacitor discharge at 70KV to 300KV peak test in air. Ratings are more than doubled when used in oil or insulating gas. Auxiliary contacts are optional to a maximum of eight SPDT, 15A, 480V AC, or 1/2A, 125V DC. Other auxiliary contact ratings are available. >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - E SERIES AIR OPERATED E15-NCP-15

HIGH VOLTAGE RELAYS - E SERIES AIR OPERATED E15-NCP-15

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps E Series Air Operated 12KV-40KV In some high voltage applications it is desirable to have full isolation between control power source and a high voltage relay or switch. Ross Engineering Corporation has developed a wide line of high voltage relays and switches which can be actuated with compressed air or other gas at pressures of 80 to 120 PSI. Some can be actuated at pressures as low as 30 PSI. UP TO 300 KV PK TEST UNITS ARE ALSO AVAILABLE. Auxiliary air valve type indicators can also be provided in place of auxiliary electrical type contacts to provide complete isolation for main contact, and also auxiliary control answer-backs to indicate full open or closed, or for holding. Units are also available for use in oil or insulating gases. When placed in oil or insulating gases voltage ratings are increased up to 3 times. Air exhaust outlets to exterior are provided to avoid contaminating the insulating fluids or impeding the cylinder action. Units can be normally open or normally closed with loss of air pressure or can be semi-latching types requiring air pressure to move in either direction. Typical E Series HV Air Operated Relay Model E15-NCP-15- They can be equipped with quick dump valves for faster action, or with ballast tanks or flow control valves for delayed action. Manual or 3 way control solenoid valves for normally open or normally closed types and 4 way control solenoid valves for 2 operation can be provided in a variety of coil voltages as well as high voltage insulating type polypropylene air tubing rated to 250 PSI. Moisture traps are also available if necessary. Use of air pressure operating although usually slower than an electrical solenoid, provides faster action and longer life than motor operation and higher forces than solenoids. Use of air pressure allows the standard relay current range of 1ma to 200 AMPS also to be extended to a line of high current switches up to 36,000 AMPS continuous. >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - E SERIES LATCHING 12KV-60KV E15-DTL-15

HIGH VOLTAGE RELAYS - E SERIES LATCHING 12KV-60KV E15-DTL-15

E Series Latching 12KV-60KV For transfer, safety grounding, or tap selection, at 12 to 60KV peak test. Most HV contacts have full installation above ground, a higher insulation level to ground is optional. Most units are spring return and can mount in any position, or may also be used with gravity return by mounting in the proper position. E series units are also available with replaceable tungsten alloy contacts for high current capacitor discharge use. Current interrupting relays, contactors, and circuit breakers are also available in higher voltages and currents for DC, AC, RF, pulse and capacitor discharge Available up to 300KV PK. Typical E Series Latching Model E15-DTL-15 >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - E SERIES MULTIPOLE E40-3PNO-40

HIGH VOLTAGE RELAYS - E SERIES MULTIPOLE E40-3PNO-40

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps E Series Multipole 12KV-60KV The E60-3PNO relay is designed for high voltage applications where 3 poles are required. This air insulated relay is constructed using fire retardant, moisture sealed anti-tracking epoxy glass laminate of the highest quality. Environmental resistant materials are standard throughout to increase its long-life, rugged characteristics. Applications for this relay include: 3 phase tap or load selection, transfer, safety grounding, and shorting. Also, it can be used for any low or high power application where 3 poles are required. this unit can be used in air, or in oil at twice it's voltage rating or in other insulating mediums and is designed to be mounted base down. Can also be used in other positions if specified. Other HV ratings and multiple pole HV relays also available >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - EA 12KV-40KV EA12-NC-20

HIGH VOLTAGE RELAYS - EA 12KV-40KV EA12-NC-20

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps EA Series 12KV-40KV The EA series of air insulated HV Relays is provided for higher continuous and momentary currents, yet is still within a compact size for 12KV to 40KV PK test in air. It has higher opening and closing forces which minimize contact resistance and closing bounce. Where no HV current interrupting rating is required, it is widely used for high power load and tap selection, circuit isolation, and grounding or shorting. It has standard, weld resistant, silver plated, easily renewable copper alloy contacts. When supplied with the optional special heavy duty arcing contacts of tungsten alloy, this series is excellent for closing in on high capacitor discharge and momentary fault currents with long life capability. As on most Ross HV Relays, one, two, or more sets of SPDT 15A, 250V AC and 1/2A, 125V DC auxiliary contacts are optionally available, if required. Other auxiliary contact ratings are available. Typical EA Series Model EA12-NC-20 >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - EA LATCHING 12KV-40KV EA40-LC-60

HIGH VOLTAGE RELAYS - EA LATCHING 12KV-40KV EA40-LC-60

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps EA Series Latching 12KV-40KV The EA series of air insulated HV relays is provided for higher continuous and momentary currents, yet is still within a compact size. It has higher opening and closing forces which minimize contact resistance and closing bounce. It is widely used (where no HV current interrupting rating is required) for high power load and tap selection, circuit isolation, and grounding or shorting. It has standard, weld resistant, silver plated, easily renewable copper alloy contacts. Also optionally available with special heavy duty arcing contacts of Tungsten alloy, this series is excellent for closing in on high capacitor discharge and momentary fault currents with long life capability in these applications. As on most Ross HV relays, two or more sets of SPDT auxiliary contacts are optionally available, if required. Typical EA Series Latching Model EA40-LC-60 >>>
View the product on rossengineeringcorp.com Ross Engineering
HIGH VOLTAGE RELAYS - EC LOW ENERGY HV SOURCES EC12-NO-12

HIGH VOLTAGE RELAYS - EC LOW ENERGY HV SOURCES EC12-NO-12

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps EC Series - Low Energy HV Sources The EC Series is a low cost gravity closing High Voltage safety transfer or shorting relay, for use with HV sources where currents and energy are low but voltages are high enough to cause injury to personnel, or damage to instrumentation if not dissipated solidly, short circuited, or grounded. The EC series relays are designed to be mounted on a floor or optionally to a ceiling or a wall with proper clearances to HV terminals of at least 3/8” through air, more if across insulating surfaces. It can be optionally modified by Ross Engineering Corp. at additional cost or by the user by adding mounting holes and by cutting off sections if necessary to reduce size to fit. Actuation life is more than 250,000 close-open operations in a 0°C to 40°C ambient. Operate time is approximately 20 milliseconds. New contact resistance is approximately 0.1 ohm. Typical EC Series - Low Energy HV Source Model EC12-NO-12 >>>
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HIGH VOLTAGE RELAYS - TYPICAL E SERIES E15-NC-15

HIGH VOLTAGE RELAYS - TYPICAL E SERIES E15-NC-15

HIGH VOLTAGE RELAYS 1KV to 300KV 1mA to 600 amps E Series 12KV-60KV For transfer, safety grounding, or tap selection at 12KV to 60KV peak test in air. Most HV contacts have full insulation above ground. A higher insulation level to ground is optional. Most units are spring return, can mount in any position, or may also be used with gravity return by mounting in the proper position. E series units are also available with replaceable tungsten alloy contacts for high current capacitor discharge applications. High momentary and continuous current ratings are a natural result of large radiuses used to minimize corona. For holding or indicating one, two or more SPST, 11A, 250V AC auxiliary contacts are available on the E12, E15, E25, and E40; the E30 and E60 normally use 15A 250V AC and 1/2A, 125V DC auxiliary contacts. Other auxiliary contact ratings are available. Available up to 300KV PK. >>>
View the product on rossengineeringcorp.com Ross Engineering


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