4.Load, electrical life

22.Contact protective circuit

4

Use of contact protective devices or protection circuits can suppress the counter emf to a low level. However, note that incorrect use will result in an adverse effect. Typical contact protection circuits are given in the table below.

Also, note that release time will slow down due to sneak in the circuit and may cause the electrical life to shorten and slight-welding.

 

 

Diode circuit

Circuit

 

 

 

 

 

 

The diode connected in parallel causes the energy stored in the coil

 

 

to flow to the coil in the form of current and dissipates it as joule

Features/Others

heat at the resistance component of the inductive load. This circuit

 

 

delays the release time. (2 to 5 times the release time listed in the

 

 

catalog)

 

 

Use a diode with a reverse breakdown voltage at least 10 times the

 

 

circuit voltage and a forward current at least as large as the load

Devices Selection

current or larger.

In electronic circuits where the circuit voltages are not so high, a

 

 

 

 

diode can be used with a reverse breakdown voltage of about 2 to 3

 

 

times the power supply voltage.

 

 

 

 

 

Diode and zener diode circuit

 

 

 

Circuit

 

 

 

 

 

Features/Others

 

It is effective in the diode circuit when the release time is too long.

 

 

 

Devices Selection

 

Use a zener diode with a zener voltage about the same as the power

 

supply voltage

 

 

In the actual circuit, it is necessary to mount the protective device (diode etc.) in the immediate vicinity of the load. If it is mounted too far away, the effectiveness of the protective device may diminish. As a guide, the distance should be within 50cm.

Avoid using the protection circuits shown in the figures below.

Although it is usually more difficult to switch with DC inductive loads compared to resistive loads, use of the proper protection circuit will raise the characteristics to that for resistive loads.

 

 

Although it is extremely effective in arc

Although it is extremely effective in arc

suppression as the contacts open, the

suppression as the contacts open, the

contacts are susceptible to welding since

contacts are susceptible to welding since

energy is stored in C when the contacts open

charging current flows to C when the

and discharge current flows from C when the

contacts close.

contacts close.

 

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Page 5
Image 5
Panasonic ASCT1F46E manual Delays the release time to 5 times the release time listed
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ASCT1F46E specifications

The Panasonic ASCT1F46E is an advanced conditioning unit designed to enhance indoor air quality while ensuring energy efficiency. As part of Panasonic's commitment to innovation, this model integrates state-of-the-art features that cater to modern living environments, making it a popular choice for both residential and commercial spaces.

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The unit utilizes a highly efficient inverter technology, enabling it to adjust the power consumption according to the cooling or heating needs of the space. This results in reduced energy costs while maintaining a steady temperature, making it an eco-friendly option. The inverter system minimizes temperature fluctuations, ensuring a consistent and comfortable atmosphere year-round.

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In summary, the Panasonic ASCT1F46E stands out in the competitive landscape of air conditioning units. With its advanced filtration system, energy-efficient inverter technology, user-friendly features, aesthetic design, and smart connectivity, it promises to deliver superior comfort and air quality, making it an excellent investment for any modern space.
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