APPLICAZIONE INDUSTRIALE 5 APPLICAZIONE INDUSTRIALE

Since the microswitch’s introduction in the 1930s, piccoli microinterruttori elettromeccanici, come i microinterruttori, si sono evoluti per soddisfare vari requisiti applicativi, compreso quello aerospaziale, elettrodomestici, boiler controls, attrezzature mediche, and sprinkler systems, apparecchiature di prova, timer, e distributori automatici. People use micro switches to detect temperature, position, and liquid level.

Precision micro switches generally have three primary types, operating handle, and shell-type specifications. Some microswitches use a push and spring design. Whether factory engineers are looking for a thermostat for residential heating or industrial boiler control, or a level switch for a large oil tank, there are five key characteristics to consider:

• Dimensions
• Electrical requirements (tensione/corrente)
• Reliability (vita meccanica/elettrica)
• Environmental factors (ambienti pericolosi, intervalli di temperatura)
• Agency approvals

Here are five key steps to help you choose the suitable microswitch for your specific application

Fare un passo 1 Understand how switching form factors affect other characteristics.

Switches size matters when choosing a micro switch. Switch size is directly related to its current range, travel, e forza operativa. Per esempio, one of the smallest microswitches on the market today measures 0.50″ x 0.236″ x 0.197″ (LxPxH). While this tiny switch is suitable for detecting circuit conditions in compact circuit breakers, it typically only interrupts 0.1 a 3 amps (UN) and has a short stroke.

Applications that require higher currents require larger switches. Per esempio, the micro switch that detects the liquid level in a fuel tank application must provide a large stroke and withstand a large current. Generalmente, the switch drives the pump in level switch applications and carries a large current. This working environment requires a large microswitch rated at 20A or 25A at 125VAC or 250VAC.

Mancia: Minore è la dimensione dell'interruttore, the smaller the travel and the interrupted current. L'anno scorso, the external size of the switch also affects the operating force. Ideally, engineers need a switch with a low operating force and high current capacity. Ma infatti, a compromise is required between these two parameters.

Microswitches maintain good contact while providing an extensive current-carrying range. The micro switch requires a stronger spring, increasing the switch’s operating force and size. Le forze operative possono variare da 2 grams in pressurized air-type applications to 8 ounces in solenoid valve applications (where higher operating forces are required). One of the most significant switches on the market measures 1.94″x0.69″x1.3″ (LxPxH).

Engineers should also pay attention to the differential travel of the switch—the distance between the switch’s tripped position and its reset position. Its threshold will vary according to different applications. Per esempio, nelle applicazioni con interruttore di temperatura, i punti di funzionamento on/off dovrebbero essere il più vicini possibile, e la corsa differenziale dovrebbe essere bassa quanto 0.0001 pollici. tuttavia, applying a liquid level pump may cause the make-up pump to start and stop too frequently, shortening the pump’s service life if the differential stroke is too close.

Fare un passo 2 Conosci i tuoi requisiti elettrici.

Microswitches are typically capable of breaking currents from 5mA/5VDC to 25A/250VAC. The Micro Switch product line offers a range of products from low energy consumption to power load electrical types for various applications. Engineers must know the current and voltage ratings (CA o CC) required to select the appropriate switch for a specific application.

As all kinds of devices in all industries strive for low energy consumption, microswitches must operate at low currents (carichi a livello logico) and DC voltage. tuttavia, some applications require switches that break high currents and voltages, such as industrial-grade pump applications. Oltre ai requisiti di carico, engineers must also select the appropriate circuit.

The switch contacts must be normally open (NO) e normalmente chiuso (NC). For NO type contacts, usually, no current flows between the contacts. The contacts are closed when the switch is actuated and connected. Per contatti di tipo NC, there is usually a current flow between the contacts. The contacts are opened when the switch is actuated, and the circuit is disconnected.

Fare un passo 3 Considera le condizioni ambientali.

Environmental requirements greatly influence the selection of microswitches, especially in applications requiring high reliability and criticality, come il controllo industriale e le apparecchiature mediche. Understand the environmental conditions of the application, including contaminants in the air that may enter the switch, il liquido in cui si trova l'interruttore, e requisiti di temperatura di esercizio.

You must choose a sealed switch with a wide operating temperature range for applications in harsh environmental conditions. Highly reliable microswitches can operate from -65 gradi Fahrenheit (-54 gradi Celsius) a 350 gradi Fahrenheit (177 gradi Celsius) for various applications. Allo stesso tempo, You must note that the degree of protection of the switch should be at least IP67 to prevent liquid intrusion. The switches’ function eliminates the need to spend a lot of time designing an enclosure that achieves the same degree of protection.

Fare un passo 4 Clarify working life requirements.

Switch reliability is critical.

It would be best to determine how much electrical and mechanical operating life an application needs.

Interruttori diversi hanno materiali di contatto diversi, housings, and terminals to meet different applications’ electrical and mechanical life requirements.

A highly reliable microswitch can operate 10 milione a 20 milioni di volte prima del guasto meccanico e 50,000 a 100,000 volte al massimo carico prima del guasto elettrico. Per quanto riguarda la leggera differenza di prezzo tra diversi interruttori di qualità, è necessario considerare il costo totale di utilizzo. Because you’re not only paying for the switch, you’re also paying for the long-term, trouble-free operation of the switch. In many cases, the additional cost of using a more reliable switch is offset by a lower warranty cost during use.

Fare un passo 5 Check Agency Accreditation Requirements

Choosing switches, which meet various international electrical requirements, can help you simplify product design for different regions. Major standard certifications include UL certification in the United States, CUL certification or CSA certification in Canada, Certificazione ENEC in Europa, and CQC certification in China.

When choosing a snap action micro switch, you need to consider multiple factors, come il fattore di forma, requisiti di carico, operating environment, e affidabilità, so it is essential to understand the actual application requirements:

1. What size switch is required?
2. What is the required power rating?
3. Is it a low voltage application?
4. L'interruttore deve essere sigillato??
5. L'interruttore deve resistere a temperature estreme??
6. Does it need international certification?

Why Choose Unionwell Micro Switch China Manufacturer?

Unionwell’s micro switch product series has basic microswitch, interruttori stagni, interruttori rotanti, interruttori a bilanciere, eccetera.

I microinterruttori hanno UL, ENEC, CQC, e altre certificazioni. La fabbrica ha superato ISO9001, IATF16949, e le garanzie del sistema di qualità ISO14001.

Elenco dei prodotti per microinterruttori sigillati subminiaturizzati serie Unionwell G3 >>

Our micro switches are widely used in home appliances, equipaggiamento elettronico, automatic machines, apparecchiature di comunicazione, car electron, apparato e strumento, electric motion tool, eccetera. Per più microinterruttori, si prega di visitare il nostro sito ufficiale:

https://www.unionwellswitch.com/

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