digital time delay relay

ANY Timer Rrelay
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Effective digital time delay relay for High-Risk Applications
Reliable digital time delay relay Styles for Industrial and Industrial Applications
CHINA – ?¡ãAny Electronics?¡À proudly presents their whole range of digital time delay relay . They provide a complete set of digital time delay relay goods as well as other interrelated products. These units are noticed in various applications for example industrial applications, industrial control circuits in addition to OEM Panels. These devices include exceptional precision and repeatability. The standard digital time delay relay that happen to be made today need pretty little panel space.
digital time delay relays ncc digital time delay relay

RHX DC 12V Delay Timer Switch Adjustable Module 0 to 10 Second NE555 Electrical New

  • Delay modue:delay connect module. One size: 77 x 23 x 18mm (length x width x height)
  • The operating voltage: 12 volts DC; (otherwise 5V optional). The use of high-performance timing CPU design.
  • The power indicator LED and switch trigger timing indication LEDs;
  • The output can be connected to AC 250V 10A DC 30V 10A load;
  • There is the chronopotentiometry regulation time, adjustable from 0 to 10 seconds by default, or by changing the Capacitance adjustment time longer.

This is a delay turn-on module.
Module based on: NE555 chip
Dimension: 68 (L) * 22 (W) * 18 (H) mm (with potentiometer )
Input voltage: DC12V
Adjustable time: 0 to 10 seconds
Control voltage: AC 0~250V / max. 10A, DC 0~30V / max. 10A
Max. load: 2200W
For applications of£º
Vehicle equipment-delay to prevent car ignition, prevention of high sudden current to burn components and devices.
Main Chip (NE555) Characteristics:
Timing from microseconds to long hours
Simple circuit design
Precision Pulse Generation / Timing
Adjustable Duty Cycle
Monostable or Astable Operation
Countless Application and Information Sources

Buy Now!
Price: $7.57


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AAA asked what are the components to pick up variation in frequency in a generator?

this means as a protection for the generator, ex. over frequency, under frequency protection relays. what component (in this relays) detecting this variation of the frequency? like current transformers are used to detect variation in current)...please help

And got the following answer:

A circuit to operate high and low trips for frequency? The basic component is a voltage to frequency converter. This can be a frequency sensitive circuit to operate a relay, using inductors or capacitors, often in a bridge arrangement. The description below is for a low cost and accurate analogue electronic approach. There are also more digital approaches measuring the period between zero crossings. Use a voltage transformer to provide a few volts that is a sample of the generator voltage. It can be filtered to reduce higher frequency interference using a simple RC filter. A threshold detector (voltage comparator or schmidt trigger) converts the sine wave to a square wave. The trigger threshold reference can be 0V for a zero crossing detector, or maybe half the peak voltage. This can be used to trigger a monostable that generates pulses of constant width, one for each cycle. For 50Hz the monostable could be around 15ms of the 20ms duration, considering 55Hz is probably the high threshold for a generator. The output of the monostable is a series of constant width pulses that can be integrated (filtered) to provide close to a DC voltage that is proportional to frequency. This voltage is then used to operate separate voltage comparators for high and low frequency. The comparator outputs operate alarm relays. There may need to be a delay so temporary overshoots during a load change are ignored. Each of these stages can be provided by a 555 timer and a few other components. Use a measured frequency source to calibrate this. There are commercial frequency monitoring relays that perform this. First link is one example. The second link is a very basic form of the circuit described above, using a single 555 timer IC. It provides a DC voltage proportional to frequency. The 555 timer is used as a monostable, should have a regulated supply voltage (5 to 12V) and the period should be set to 15ms. Look up 555 timer for more info. There are numerous ways to do this. You might find other examples by searching for tachometer circuits.


The digital time delay relay function particularly properly with unique applications which might be specific to power distribution and protection. The relays come with wide adjustment ranges having a scale that is certainly easy to study either in 3 or four digits based on the model. These digital time delay relay support in growing the flexibility with the applications, cut down the overall power and maintenance expenses. You will discover relays that are employed for common purposes which are available in reputable designs with quick replacement options. And you will discover models that happen to be used for industrial applications and heavier duty applications that work on huge loads. These goods are made to meet the lifetime industrial control desires of the applications.
Their most up-to-date merchandise will be the Time counter, Timer Delay, digital time delay relay, Quick Connect Couplings, Electronic Motor Couplings, Aluminum Couplings, Morse Couplings and numerous other people. The site delivers a detailed description of every single model in different categories of digital time delay relay couplings and sensors. These merchandise are really valuable for high-risk applications. The digital time delay relay are also obtainable with functions like numerous timing ranges and functions. The organization is currently in search of agents and dealers who can promote and sell their factory created solutions. They may be generally on a lookout for establishing new and more trustworthy solutions determined by the requirements and specifications from the sector.

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