Although Both The Withstand Voltage Test And The Leakage Current Test Can Be Used To Test The Insulation Strength Of The Tested Target, There Are Some Key Differences In The Test Process And Results. The Withstand Voltage Test Is Performed Under High Voltage After The Insulation System Of All Current-Carrying Parts Of The Tested Target Is Short-Circuited. The Leakage Current (Touch Current) Test Is Performed Under Electrical Conditions Using Experimental Equipment To Imitate Human Body Impedance.
Although These Two Tests Are Different, They Are Very Useful In Ensuring Product Safety. The Withstand Voltage Test Is A 100% Routine Test (RoutineTest), And The Leakage Current Test Is Generally Regarded As A Type Test.
With The Widespread Adoption Of Today’s Low Voltage (LVD) Guidelines, Withstand Voltage Tests And Leakage Current Tests Will Become Standardized Production Line Tests, And More Tests, Such As Insulation Resistance Tests And Ground Resistance Tests, Will Be Added.
High-Quality Electrical Products Must Pass Safety Standards Tests In Many Aspects, Including Withstand Voltage Test, Insulation Resistance Test, Ground Impedance Test, Leakage Current (Touch Current) Test, Etc. In These Safety Standard Test Items, The Troublesome Part Is The Leakage Current Test (Touch Current Test). This Product Can Measure Abnormal Leakage Current Through Leakage Current Test. Leakage Current Tester Is A Common Test Instrument For Leakage Current Test.
Operation Leakage Current (Touch Current) Test
In Recent Years, Many Product Safety Regulations Require Products To Be Tested For Leakage Current, Whether In Product Design Testing Or Production Line Testing, Especially In The Design Phase. After These Tests, Product Design Engineers Can Obtain A Lot Of Important Information About Product Integrity , To Make The Product More In Line With Safety Regulations. When The Tested Target Is Tested Under The Additional Voltage Or 1.1 Times Of The Regular Output Additional Voltage, That Is, When The Product Is Tested Under Actual Use And Faulty Conditions, In The Ground Leakage Current Test, The Ground Wire Of The Tested Target Is Measured To Confirm The Flow Return The Current To The Neutral Line Of The System. In The Cabinet Leakage Current Test, The Current From Different Points On The Cabinet To The Neutral Point Of The System Is Measured.
Withstand Voltage (Insulation) Experiment Is To Imitate The Insulation System Of The Tested Target Must Be Able To Withstand Higher Voltage For A Certain Period Of Time Under Conditions Far Beyond Normal Use. The Product’s Withstand Voltage Test Means That It Can Operate Safely In Normal Use And Can Withstand Normal Switching Transients. This Is A Universally Useful Test, And Product Manufacturers Can Also Use It To Confirm The User’s Fundamental Quality Mark Of The Product.
In A Simple Test Combination, The Connection Between The Withstand Voltage Tester And The Tested Target Can Pass Through The Socket Box Or The Test Lead, And Then The Withstand Voltage Tester Applies Voltage To The Tested Target. If The Passing Leakage Current Is Too Large, The Withstand Voltage Tester Will Show Faults, Indicating That The Tested Target Has Not Passed The Test. If There Is No Excessive Leakage Current Tested, The Withstand Voltage Tester Will Show That It Has Now Passed, Indicating That The Tested Target Has Now Passed The Test. The Value Of The Excessive Leakage Current Is Determined By The Set Value Of The Maximum Allowable Current Level, Which Can Be Adjusted On The Withstand Voltage Tester To Confirm Whether The Test Has Passed. The Withstand Voltage Tester Actually Focuses On The Degree Of Insulation Between Current-Carrying Conductors And Non-Current-Carrying Conductors, Such As Exposed Non-Current-Carrying Metals. This Is A Good Way To Find Product Design Problems, Such As Placing Conductors Too Close.
The Operating Conditions Of The Withstand Voltage Test Of The Programmable Leakage Current Tester
Program-Controlled Leakage Current Tester Generally Speaking, The Specifications Of Safety And Regulatory Organizations Do Not Have The Measured Value Of The Regular Pressure Test, But Are Determined By The Manufacturer Of The Tested Product. If The Maximum Withstand Voltage Leakage Current Value Is Not Specified, *A Good Test Method Is To Set The Withstand Voltage Leakage Current Value That Reaches The Trip Level, Which Is Slightly Higher Than The Value Of The Test Target When The Power Supply Is Normally Cut Off Under The Test.
Withstand Voltage Leakage Current * General Safety Specifications And Specifications Can Refer To Several UL Specifications, Generally “120k Ohm” As A Reference. This Specification Sets A Fixed Resistance, Which Will Definitely Lead To A Fault Indication In The Withstand Voltage Test. In The Early Stage, 1000 Volts Plus Twice The Extra Voltage Of The Equipment On The Side Of The Quilt. This Is A Common Setting For Withstand Voltage Tests. Since The Extra Voltage For Most Test Targets Used In The United States Is 120
In The Leakage Current Test, The Measured Current Can Be Used To Calculate The Approximate Value Of The Current Trip Setting For The Withstand Voltage Test. This Is Only An Approximate Value, Due To The Deviation Of Equipment Components May Cause Small Differences In The Leakage Current Readings Of Different Test Targets. When Calculating The Relevant Leakage Current Settings, It Is Very Important To Understand The Fundamental Difference Between The Withstand Voltage Test And The Leakage Current Test. Although Most Leakage Current Testers Provide Output Line (L/N) Switching Tests, They Only Measure The Leakage Current From A Current-Carrying Component To The Case Of The Device Under Test Together. The Withstand Voltage Test Measures The Leakage Current Of Two Current-Carrying Components Together, Thereby Showing A Higher Leakage Current Reading. A Useful Rule Of Thumb Is To Set The Withstand Voltage Test Trip Current To About 20% To 25% Of The Calculation Result Of The Following Formula:
(Withstand Voltage Test Voltage/Leakage Current Test Voltage) *Leakage Current Test Current = Approximate Value Of Withstand Voltage Test Current.
Post time: Feb-06-2021
