What is the function of an interlock system?
Michael Gray
Updated on April 02, 2026
In most applications, an interlock is used to help prevent a machine from harming its operator or damaging itself by preventing one element from changing state due to the state of another element, and vice versa.
How does interlock switch work?
The Interlock Kit is a device that creates a mechanical interference between the main breaker and a generator back feed breaker. This interference prevents both breakers from being turned ON at the same time. Depending on the capacity of the generator you may be able to run all of the circuits in your home.
Why interlocking is necessary during the closing of CB?
The function of the key interlock is to prevent an open breaker from being closed when the lock bolt is extended and its key is removed. Door interlocks prevents the breaker compartment door from being opened. On drawout breakers, these devices are mounted in the equipment and are part of the circuit breaker enclosure.
What are safety interlocks?
Safety interlock switches are used as interlock devices that can prevent machine operation or startup in an unsafe situation, such as when a door or guard is open. Interlock devices with a locking function can also prevent doors or guards from being opened while the machine is in operation.
Where can interlock switches be found?
Light Bulbs, Lamps & Tubes(1670)
What is difference between interlock and trip?
An interlock may prevent an action until another action has occurred or may cause another action to happen automatically. Trips are for protection circuits.
What is an ignition interlock device?
An ignition interlock is a court- or licensing agency-ordered device installed in an individual’s vehicle to prohibit drinking and driving after a person has been convicted of DUI/DWI. Sometimes, an ignition interlock is used in place of license suspension. Once you have an IID installed, you’ll either receive some sort of installation
Why does the ignition interlock need a second breath sample?
Sometimes, after the engine is started and the person is driving, the device will request another breath sample; basically, this is another way to make sure someone else didn’t provide the initial breath sample. Generally, the ignition interlock gives you several minutes to provide the sample; this is so the driver can find a risk-free location.
How much does an Intoxalock ignition interlock cost?
The daily cost of having an Intoxalock ignition interlock device breaks down to about $3 per day each month. Comparably, this is less than a medium latte at a coffee shop, or a sandwich from a drive-through restaurant. Depending on the state, the cost of a monthly lease for an IID can range from $60 – $90.
Can you start a car with an interlock device?
Starting the Vehicle Before starting the vehicle, the driver must blow into the interlock device mouthpiece—if the device registers a breath-alcohol concentration that meets the programmed limit requirements, the vehicle will start. However, if the breath-alcohol concentration is higher than the limit, the vehicle won’t start.
