ELECTRICAL SAFETY ANALYZER

 

                 ELECTRICAL SAFETY COMPLIANCE TESTER

 

A dielectric strength or hipot test determines the suitability of the dielectric or insulation barrier between the Dangerous and non- Dangerous parts. A dielectric resistor between Dangerous circuits and user accessible circuits or surfaces usually requires all established safety standards. Dielectric strength testing is a fundamental way of ensuring that a product is safe before placing it on the market.

The dielectric barrier protects hipot tester distributor the user from exposure to Dangerous electrical potentials. The most common points of application for dielectric facing tests are between the AC primary circuit and the low voltage secondary circuit as well as between the AC primary circuit and the user-accessible conductive parts / ground. Confirming the proper dielectric intercept between these regions that electric shock under normal and single fault conditions confirms the existence of a level of protection. A dielectric test (dielectric strength test) appears in almost every product safety standard and is a fundamental test employed to examine a fully assembled product as it exits the production line.

Insulation Resistance

 

Insulation resistance measurements are usually conducted to determine the actual resistance between the two points tested. This test is similar to the DC hipot test except that it exhibits resistance rather than leakage current. Electrical safety compliance tester It serves as a practical and effective method of verifying the suitability of the product for use by the public. More information on insulation resistance testing.

Leakage Current

All products that use an AC line source as equipment have some associated leakage current when the equipment is on and operating. This leakage current normally goes from the AC line source to the ground via the ground path in the product and flows through the ground blade on the power cord. On products with ground blades or without malfunctions, a capability may hipot tester distributors in india develop on the metal surfaces of the product. If a person then comes in contact with the exposed metal surface, then this person becomes the basis of the product.

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Under this condition, a certain amount of leakage occurs through a person exposed to the metal surface. If the leakage current is too low, Electrical safety compliance tester usually less than 0.5mA, the person should not be in the way of current flow. At a higher level than this, the person may experience shocking reactions or worse.

For this reason, products that do not use ground on the power cord are usually limited to a maximum leakage current of 0.5mA or less. Products that exceed this level typically have a ground on the power cord to return the leakage current, protecting the person who comes in contact with any exposed metal on the product.

The current limit of leakage on medical products is quite low. The leakage current discussed here is different from the measurement of leakage current during a dielectric withstand or hipot test. During dielectric withstand tests, a high voltage is typically applied between warm and neutral lines over 1000V and the ground of the DUT. The leakage current is then measured. In a leakage current test, the product is driven and operated through a standard line voltage, such as 120VAC. The leakage current is then measured using a special circuit that simulates the impedance of the human body.

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A ground continuity test checks whether a path exists between all exposed conductive metal surfaces and the ground of the power system. This ground circuit provides the most basic means of electric shock protection for a user. If a malfunction occurs in the product, causing the power line voltage to be connected to a surface that the user can touch, a high current electrical system will flow through the ground connection, causing the circuit breaker to trip or fuse in type. ; Shielding the user from shock. Ground continuity tests are usually performed using a low current DC source (<1 Amp) to determine if there is a low resistance between the ground blade on the power cord and any exposed metal on the product.

A polarization test is a simple test that confirms that the product supplied with a polarized line cord (larger than a neutral prong with a 3-prong plug or a 2-prong plug) is properly connected.

A ground bond test verifies the integrity of the ground path by applying a high current, low voltage source to the ground path circuit, typically 25 or 30% current. This test is similar to a ground continuity test, which confirms how a product will perform in the event of an actual fault. When a ground fault occurs, current starts to flow through the ground circuit. If the current-carrying capacity is high enough and the circuit resistance is low enough, the system works properly and the user is protected from shock.

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