solid state variable relay

ANY Timer Rrelay
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Helpful solid state variable relay for High-Risk Applications
Reliable solid state variable relay Styles for Commercial and Industrial Applications
CHINA – ?¡ãAny Electronics?¡À proudly presents their complete variety of solid state variable relay . They provide a full set of solid state variable relay merchandise as well as other interrelated goods. These units are observed in diverse applications for instance industrial applications, industrial handle circuits and also OEM Panels. These devices include great precision and repeatability. The typical solid state variable relay which can be developed nowadays need quite little panel space.
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Daking Mic Pre One

  • Class A amplifier, all-discrete solid state design Jensen transformer-isolated mic input Variable high-pass filter (0-200Hz) 20dB pad Inputs for mic, line, and instrument-level signals Front-panel Hi-Z instrument input Phase reversal switch +48V phantom power Full-width 20-segment, bi-color LED meter Balanced XLR output and 1/4" line output External power supply for noise-free operation and longer component live Rohs Compliant

The Daking Mic Pre One is a free-standing single-channel preamplifier that uses the same circuitry found in Daking's 4-channel Mic-Pre IV, a favorite among top producers and engineers such as Butch Vig (Nirvana, Green Day, Smashing Pumpkins), David Pensado (Mary J Blige, Beyonce, Brian McKnight), and both Chris and Tom Lord-Alge (who haven't they mixed?). Built in the tradition of the great console manufacturers such as Neve and API, Daking preamps feature bulletproof construction and marvelous sound, reminiscent of the coveted classic pres. While sharing the gain structure and Class A, fully discrete transistor circuitry design of the popular Daking Mic Pre IV, the Mic Pre One adds a unique variable high-pass filter and comes in a freestanding 'DI-style' steel enclosure, ensuring both durability and immunity from noise. Mic Pre One features switchable phase, 20dB mic input pad and +48V phantom power, plus a selectable 1/4" front panel Hi-Z instrument input, all utilizing relays with gold bi-furcated contacts. Two large knurled aluminum knobs control the variable high-pass filter (0-200Hz) and continuously variable input gain between 25dB and 70dB. A 20-segment LED bargraph display provides accurate metering. Another LED signifies when power is supplied to the Mic-Pre One. Rear-panel connections include a transformer-isolated input for a microphone, plus line outputs on 1/4" jack and XLR.

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Price: $723.45


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Bill F asked Grid connect Controller for wind turbine driven induction generator (async motor)?

Thanks to your many very helpful answers to my previous questions I was able to find a company that sells such a device. As you may recall, I was intrigued by this device: http://www.clariantechnologies.com/main/page_home.html. It is a vertical axis wind turbine driven async motor that acts as an induction generator that plugs directly into an existing outlet in your home. No inverters, no batteries. Sales price around $500. With an electric meter (a freebie from our power company) than can run backwards, this would allow me to greatly reduce my energy bill all at a very low cost. To make the cost even cheaper, and to increase the power output, I want to make my own wind turbines, and use my own async motors. So all I need is the controller. I have found a company that sells such a device: http://www.prairieturbines.com for $830. It connects a 5500 watt wind turbine driven async motor directly to the grid. No inverter, no batteries. It uses a "hall-device" to measure the RPM, it provides about 1 AMP to the motor to energize its coils, 50amp solid state "zero-cross relays", capacitors, 30amp breaker/enclosure, an exterior mounted disconnect, and an interior-mounted fused-control voltage switch. This is it!!! So my question is, does anyone know how to build this controller. This company doesn't sell the plans to this, and $830 is too high for me. I am sure I could build this with components for less that $400. If there is any electrical engineering person out there that can help, this will be a challenge, but it is great knowing that someone already has figured this out and is selling it.

And got the following answer:

Look at the Prairie Turbines site again. The price of the micro-controller including the hall device is $255. The $45 book provides a complete list of material and instructions to build everything else. The micro-controller monitors the speed sensor and provides control signals to two solid-state relays. One relay connects the motor to the grid when the speed reaches the motor’s 1800 RPM synchronous speed and disconnects the motor if the speed drops below 1800 RPM. The other relay is energized to release the brake when the controller is energized and de-energized by the controller when the motor speed exceeds the maximum safe operating speed. If this occurs, the controller apparently must be manually reset. I did not find the maximum safe operating speed stated on the web site. If the full load speed of the motor is 1750 RPM, the full load slip is 1800 minus 1750 or 50 RPM. The speed at which the motor would generate full load current and present full load torque to the turbine is 1800 RPM plus the full load slip or 1850 RPM. With the design described, a three-phase motor is connected to a single phase source with capacitors connected between the source and the third motor phase. That is likely to increase the motor slip somewhat. I am not sure what happens if the motor is driven above the speed at which it generates full load current. A three-phase motor operating as an induction generator connected to a three-phase supply has a torque vs. speed curve that is something like the mirror image of the motoring torque vs. speed curve. The curve is likely different with the single-phase connection used in this case. I don’t know what the speed vs. current curve looks like in either case, but I will see if I can find it. I am also curious to know if the Alan Plunkett listed on the web site as an author is the Alan Plunkett that is well known author of technical papers on inverter and variable frequency drive subjects. Added information: I found information indicating that, for a 3-phase motor connected to a 3-phase supply, the speed vs. current curve for induction generator operation is like a mirror image of the speed vs. current curve for motor operation. That would mean that the maximum speed would need to be limited to the synchronous speed plus the full-load slip. The web site indicates that the full-load speed for the motor that they used is 1725 RPM for 3-phase operation. That would make the maximum speed 1875 RPM plus the additional slip due to the single phase with capacitor arrangement.


The solid state variable relay function exceptionally effectively with distinct applications that are specific to power distribution and protection. The relays come with wide adjustment ranges with a scale which is easy to study either in three or four digits in line with the model. These solid state variable relay enable in rising the flexibility with the applications, minimize the general energy and maintenance charges. There are relays which are applied for basic purposes which come in reliable styles with speedy replacement alternatives. And you’ll find models which might be made use of for industrial applications and heavier duty applications that operate on large loads. These items are made to meet the lifetime industrial handle demands of your applications.
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Dynapower TC-300R8A 300W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-300R8A 300W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-300R8A 300W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-300R8A - Condition: New - Packaging: Retail


Dynapower TC-700RVN2 700W ROHS Dual AC Inlet EPS 12V Redundant Power Supply

Dynapower TC-700RVN2 700W ROHS Dual AC Inlet EPS 12V Redundant Power Supply

Dynapower TC-700RVN2 700W ROHS Dual AC Inlet EPS 12V Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-700RVN2 - Condition: New - Packaging: Retail


Dynapower TC-650RVN2 650W ROHS Dual AC Inlet EPS 12V Redundant Power Supply

Dynapower TC-650RVN2 650W ROHS Dual AC Inlet EPS 12V Redundant Power Supply

Dynapower TC-650RVN2 650W ROHS Dual AC Inlet EPS 12V Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-650RVN2 - Condition: New - Packaging: Retail


Dynapower TC-1U40-TH 1U 400W ROHS w/ Thermal Control EPS 12V Short Depth Power Supply

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Dynapower TC-2U40-TH 2U 400W ROHS with Thermal Control EPS 12V Short Depth Power Supply

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Dynapower TC-2U35-TH 2U 350W ROHS with Thermal Control EPS 12V Short Depth Power Supply

Dynapower TC-2U35-TH 2U 350W ROHS with Thermal Control EPS 12V Short Depth Power Supply

Dynapower TC-2U35-TH 2U 350W ROHS with Thermal Control EPS 12V Short Depth Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-2U35-TH - Condition: New - Packaging: Retail


Dynapower TC-1U35-TH 1U 350W ROHS w/ Thermal Control EPS 12V Short Depth Power Supply

Dynapower TC-1U35-TH 1U 350W ROHS w/ Thermal Control EPS 12V Short Depth Power Supply

Dynapower TC-1U35-TH 1U 350W ROHS w/ Thermal Control EPS 12V Short Depth Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-1U35-TH - Condition: New - Packaging: Retail


Dynapower TC-400R2U 2U 400W Active PFC ROHS EPS 12V Redundant Power Supply

Dynapower TC-400R2U 2U 400W Active PFC ROHS EPS 12V Redundant Power Supply

Dynapower TC-400R2U 2U 400W Active PFC ROHS EPS 12V Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-400R2U - Condition: New - Packaging: Retail


Dynapower TC-500R8A 500W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-500R8A 500W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-500R8A 500W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-500R8A - Condition: New - Packaging: Retail


Dynapower TC-400R8A 400W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-400R8A 400W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-400R8A 400W ROHS Dual AC Inlet EPS 12V Mini Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-400R8A - Condition: New - Packaging: Retail


Dynapower TC-400R8 400W ROHS Single AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-400R8 400W ROHS Single AC Inlet EPS 12V Mini Redundant Power Supply

Dynapower TC-400R8 400W ROHS Single AC Inlet EPS 12V Mini Redundant Power Supply - Manufacturer: Dynapower - Mfg Part Number: TC-400R8 - Condition: New - Packaging: Retail


Dynapower SS-2U60EL 2U 600W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply

Dynapower SS-2U60EL 2U 600W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply

Dynapower SS-2U60EL 2U 600W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply - Manufacturer: Dynapower - Mfg Part Number: SS-2U60EL - Condition: New - Packaging: Retail


SPI R-FSP1000-50TGM 10000W ATX EPS 24PIN 13CM BB FAN APFC 10*SATA PCI-E 80Plus Power Supply

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SPI R-FSP1000-50TGM 10000W ATX EPS 24PIN 13CM BB FAN APFC 10*SATA PCI-E 80Plus Power Supply - Manufacturer: SPI - Mfg Part Number: R-FSP1000-50TGM - Condition: New - Packaging: Retail


XIGMATEK NRP-HC1001 1000w ATX 12v v2.2 / eps 12v v2.92 80 plus & sli ready modularized w/ active pfc power supply

XIGMATEK NRP-HC1001 1000w ATX 12v v2.2 / eps 12v v2.92 80 plus & sli ready modularized w/ active pfc power supply

XIGMATEK NRP-HC1001 1000w ATX 12v v2.2 / eps 12v v2.92 80 plus & sli ready modularized w/ active pfc power supply - Manufacturer: Xigmatek - Mfg Part Number: NRP-HC1001 - Condition: New - Packaging: Retail


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Dynapower SS-1U60EL 1U 600W Active PFC EPS 12V Short Depth 80Plus Bronze Certified Server Power Supply

Dynapower SS-1U60EL 1U 600W Active PFC EPS 12V Short Depth 80Plus Bronze Certified Server Power Supply - Manufacturer: Dynapower - Mfg Part Number: SS-1U60EL - Condition: New - Packaging: Retail


Dynapower SS-2U50ES 2U 500W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply

Dynapower SS-2U50ES 2U 500W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply

Dynapower SS-2U50ES 2U 500W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply - Manufacturer: Dynapower - Mfg Part Number: SS-2U50ES - Condition: New - Packaging: Retail


Dynapower SS-1U52ES 1U 500W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply

Dynapower SS-1U52ES 1U 500W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply

Dynapower SS-1U52ES 1U 500W Active PFC EPS 12V Short Depth 80 Plus Bronze Certified Server Power Supply - Manufacturer: Dynapower - Mfg Part Number: SS-1U52ES - Condition: New - Packaging: Retail


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