لماذا يتم استخدام الفاريستور شرح MOV Varistor VDR Why Varistor Is Used? Explained
Why Varistor Is Used? MOV, Varistor and VDR Explained
Why Varistor Is Used?
A varistor (voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. Varistors are used to protect a circuit from high voltage surges. When a high voltage surge is applied to a circuit, the outcome is usually catastrophic to the circuit.
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Understanding Varistors: Your Essential Guide to Surge Protection
abdelraouf89 Explains: Ever had an electronic device mysteriously fry during a storm? Blame it on surge voltage, sudden spikes in electricity that can damage delicate components. But fear not! Electrical technicians have a secret weapon in their arsenal: the varistor.
What is a Varistor?
Imagine a resistor, the workhorse of electronics that controls the flow of current. Now, picture a resistor that changes its resistance based on voltage. That's a varistor, also known as a Metal Oxide Varistor (MOV) or Voltage Dependent Resistor (VDR).
How Does a Varistor Work?
Under normal voltage conditions, a varistor acts like a high-resistance wall, barely allowing any current to pass through. However, when a surge strikes, the voltage spikes. This sudden change causes the varistor to become a low-resistance path, diverting the excess current away from your precious electronics and safely grounding it. It acts like a pressure release valve for the electrical flow.
Varistor vs. Resistor: Key Differences
Regular resistors offer constant resistance, while varistors are non-linear. Their resistance changes dramatically with voltage. This makes varistors ideal for surge protection, as they only react during voltage spikes.
Where are Varistors Used?
These little champions are found in various electronics, from everyday appliances like TVs and computers to industrial equipment. They act as silent guardians, silently absorbing surges before they can cause harm.
Learning More About Varistors:
Ready to delve deeper? Explore these resources to become a varistor pro:
Varistor Explained: Understand the technical details of varistor construction and operation.
Surge Protector DIY: Learn how to build your own basic surge protector using varistors (with caution and proper guidance from a qualified electrician).
Varistor Connection: Discover how to connect varistors in your circuits for optimal protection.
Mastering Electronics Basics:
Understanding varistors is just one step in your electrical knowledge journey. Learn more about:
Resistors: Explore the fundamental building blocks of electronic circuits.
Surge Voltage: Discover the causes and dangers of voltage spikes.
Electrical Interview Tips: Prepare for your next electrical interview by demonstrating your knowledge of surge protection.
So, the next time you hear thunder rumble, don't worry! With varistors standing guard, your electronics can weather the storm.
لماذا يتم استخدام الفاريستور؟
المكثف (المقاوم المعتمد على الجهد (VDR)) عبارة عن مكون إلكتروني يحمي التيار الكهربائي بمقاومة كهربائية تختلف باختلاف الجهد المطبق. تستخدم المتغيرات لحماية الدائرة من ارتفاع الجهد العالي. عندما يتم تطبيق زيادة الجهد العالي على الدائرة، فإن النتيجة عادة ما تكون كارثية على الدائرة.
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