Effective level control relay for High-Risk Applications
Reliable level control relay Designs for Commercial and Industrial Applications
CHINA – ?¡ãAny Electronics?¡À proudly presents their complete range of level control relay . They provide a complete set of level control relay products along with other interrelated items. These units are seen in distinct applications for example commercial applications, industrial manage circuits as well as OEM Panels. These devices come with exceptional precision and repeatability. The typical level control relay which are made today demand quite tiny panel space.
warrick level control relay
dual level control relay
omron level control relay
Description: It is used in auto-control circuit with the circuit of AC50/60Hz as liquid level equipment. It can be used in water industry as liquid level control components. LED Indicator for water supply and drainage status. Notice: The working voltage is AC220V, please check your local voltage to make sure this item woks successfully.
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The problem involves a windshield wiper switch system. The selector switch has settings high, low, multiple intermittent and off. The switch provides input to an electronic module that operates the wipers via a couple relays. The switch has two inputs to the module and a return. The two inputs, I'll call PW and BR, use resistance levels to interface to the module. The PW input is specified as follows: High: 0 ohms Low: 4.4k Intermittent: 11.3k Off: 44k The BR input selects intermittent interval. (Not part of issue) The problem was that the wipers would only turn on High. Any other position and the wipers would stop. I discovered the problem when I disconnected PW from the switch and then connected a rheostat as the input to the module. As expected when rheostat at 0 ohms the wipers activate on High. Slowly turning the rheostat cause the wipers to shift to Low but at ~500ohms (not 4.4k), intermittent at ~1500 ohms ( not 11.3k) and then off at ~5k ohms (not 44k). When intermittent selected, all levels function properly hence no issue BR input. I tested resistance of the PW wiring from switch to module and all ok. Something is causing the module to trigger on the PW input at approximately 1/8th of the designed levels. First question, assuming the module is not defective (I already swapped), what could cause the module to behave as such? Could improper input voltages (etc) be at fault? Second and most interesting for me is if there was a simple circuit that could 1/8th the switch resistance thereby working around the issue. Parallel resistors to reduce won't work and that exhausts my electronic abilities. Thanks!
And got the following answer:
POSSIBLE FAILURE...  Voltage level could be too low if it used voltage control, rusty junction somewhere in the circuit.  Defective selector module. Since you made it works at 500 ohm and 5K, why not make your own selector module with these resistance value to force it works . Or a 5K potentiometer could be used.
The level control relay function exceptionally well with distinctive applications which are precise to power distribution and protection. The relays include wide adjustment ranges using a scale that’s easy to study either in three or 4 digits in line with the model. These level control relay support in rising the flexibility of the applications, minimize the all round energy and upkeep costs. You will find relays which are utilized for common purposes which are available in trustworthy styles with rapid replacement solutions. And you will discover models which might be employed for industrial applications and heavier duty applications that operate on massive loads. These merchandise are produced to meet the lifetime industrial control needs from the applications.
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