How do I know what MOV I have?
By Sebastian Wright
How do I know what MOV I have?
Estimate the MOV’s energy rating in units of joules. This is the electrical energy that the MOV can safely absorb at least once before failing. You can calculate the energy by multiplying peak surge volts by amps, and then by seconds of time. For example, 1,000 volts x .
What are the numbers on varistor?
The energy rating for the varistor is often defined using standardised transients. The transient is expressed in the format x/y where x is the time for the transient rise and y is the time to reach its half peak value. Typical formats are 8/20 and 10/1000.
What is MOV in power supply?
A Metal Oxide Varistor (MOV) is a protection component used in power supply circuits that is powered directly from AC mains. It is used to protect the circuit from high voltage spikes by varying its resistance.
What is full form of MOV?
MOV Full Form
| Full Form | Category | Term |
|---|---|---|
| QuickTime Movie | Computing | MOV |
| Movie (autocad Autoflix) | File Type | MOV |
| Timebased Multimedia File (apple Quicktime) | File Type | MOV |
| Metal Oxide Varistor | Electronics | MOV |
How do I select a MOV varistor?
MOV Selection Guide | Power Supply Peripheral Design Series
- (1) Wide working voltage range (mainstream 18-1800V, divided into several grades).
- (3) Strong impulse current resistance (up to 100-15000A).
- (1) Step 1: VARISTOR VOLTAGE calculation.
- (2) Step 2: Calculation of MAXIMUM ALLOWABLE VOLTAGE.
What happens when MOV fails?
When subjected to stresses above its ratings, an MOV can fail as a short circuit. If applied conditions significantly exceed the energy rating of the device, and current is not limited, the MOV may be completely destroyed. For this reason, the use of current-limiting fuses is suggested.
What is MOV capacitor?
How does a varistor work?
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. When a voltage surge exceeding a specified voltage (varistor voltage) is applied, the varistor suppresses the voltage to protect the circuit.
Can you remove a varistor?
You can replace it with a new one provided it is for the same voltage levels that it triggers. This AC and DC voltage ratings are the important parts and then the energy capacity. Energy cap. is not a major issue in Computer PSUs since the usually use a small varistor there.
