What is the purpose of the breaker points?
The breaker points control the flow of current through the primary of the coil and open and close approximately 150 times per second in a V-8-powered car traveling 60 miles per hour. Under such operating conditions, the points are closed for approximately 0.005 of a second for each spark created.
How do you set contact breaker points?
Contact breaker with points fully open. The gap shown is exaggerated for clarity. Place the feeler gauge blade between the points, and a screwdriver blade in the adjusting slots. Tighten the fixing screw, then check that points gap remains the same.
Do points fire when open or closed?
Points. Ignition points are a set of electrical contacts that switch the coil on and off at the proper time. The points are opened and closed by the mechanical action of the distributor shaft lobes pushing on them.
How do HEI distributors work?
The HEI distributor is an inductive-discharge-style ignition, but with the points replaced by a solid-state switching device called an electronic ignition-control module. The module works like an electrical switch, turning power on and off to the ignition coil. This, in turn, causes the coil to generate spark.
Can points cause no spark?
If no spark is visible, check to see if the points or wires are shorting to ground either at the points or at the primary terminal screw going through the housing. Also check where the contact spring connects to the main frame of the points and make sure the insulator is not melted. 3.
Does point gap affect timing?
The dwell, as well as spark plug gap, do have an effect on ignition timing. The later the points open, the later the spark comes and retards the timing. The earlier the points open the sooner the spark comes and advances the timing. That is why timing is the last thing to be set in a tune-up.
What happens if point gap is too big?
Re: What is the effect of the points gap being too large? Too wide a point gap decreases the dwell angle. This does not give the coil sufficient time to charge, resulting in a weak spark. It also slightly retards the timing.
Do points affect timing?
Do all distributors have points?
If you open your hood, be sure your car has a distributor cap with very thick wires coming out of the top and going to each spark plug. If you don’t have a standard distributor cap like this, you don’t have points. If you do have a standard distributor cap, you can open the cap up and peek inside.
Who should review schematic diagrams for circuit breakers?
Only qualified persons should review schematic diagrams and perform work on circuit breakers.
What is a medium voltage circuit breaker schematic diagram?
In a General Electric Power/Vac medium-voltage circuit breaker schematic diagram, the circuit breaker is shown de-energized with the circuit breaker open and no control power applied. The spring charging motor (M) energizes.
How are circuit breakers connected to the panel?
The breakers are installed in a panel so that contact is made with one of two hot bus bars running down the middle of the box. The hot wire for a branch circuit is connected to the breaker by a set screw on the base.
What is a 200 amp circuit breaker service panel?
This diagram illustrates some of the most common circuits found in a typical 200 amp circuit breaker service panel box. The breakers are installed in a panel so that contact is made with one of two hot bus bars running down the middle of the box. The hot wire for a branch circuit is connected to the breaker by a set screw on the base.