Info!! Put Down Continuity & Put Down Bonding Tests On Ability Supplies

I heard to a greater extent than or less news on this dependent champaign inwards our facility recently, too idea it would brand a expert weblog article.
The security bodies (UL, CSA, IEC etc.) involve that electrical too electronic products are suitably protected too tested; to ensure the user does non piece of work an electrical daze that could hurt or fifty-fifty kill.

One of the areas of work organization is the grounding (earth) of the product, too the next tests are conducted; non but during production security certification testing, but likewise inwards production.  This is mandated on all products alongside a pluggable ability cord.

Ground Continuity

The basis continuity exam verifies the connexion betwixt the basis pivot on the ability cord too whatever exposed metallic parts on the equipment.  An air conditioning or DC voltage tin live on used, too the electrical current is typically quite low, less than 1A.  A uncomplicated handheld device tin live on used for testing

Ground Bonding

Unlike the continuity test, the bonding checks the integrity of the grounding.  This is typically measured using a 25 or 30A electrical current (depending upon the rating of product’s internal air conditioning fuse or branch circuit) simulating an actual internal fault.  The applied voltage is less than 12V too the maximum resistance betwixt the globe too exposed metallic surfaces is 0.1 ohm. The resistance tin live on determined past times mensuration the voltage drop.  Depending upon the security way requirements, this exam is performed for threescore to 120 seconds.

Using a higher electrical current than the continuity exam ensures that whatever hardware inwards the basis path is fully tightened, whatever wire joints are properly crimped, too whatever printed wiring board traces are real capable of treatment the current.  The fuse or breaker should opened upwards earlier a loss of the basis connection.

There are a pose out of commercially available testers on the marketplace than tin live on programmed for production use.

If you lot blueprint your ain tester at that topographic point are 2 things you lot should note:

1. Make certain that you lot produce non include the cable drops when mensuration the voltage (have the meter read at the connexion points)
2. Apply the exam probes when at that topographic point is no ability applied; otherwise the resulting spark tin score the metallic parts too harm the plating.

As a banknote basis bonding may live on likewise live on referred to equally globe bonding.

Power Guy