Wireless Communication
EU RED Network Security Standard EN 18031
Wireless and communication detection
Mobile communication product certification
Bluetooth BQB Product Certification
FM/AM Product Certification
WiFi Product Certification
Wireless charging product certification
Interphone product certification
Base station certification
SAR testing
Receiver Product Certification
5G NR Product Certification
UWB Product Certification
Internet of Things authentication
Electromagnetic compatibility
Automotive Electronics EMC Testing
EMC rectification
EMC
Automotive Electronics
Electrical performance testing
EMS testing - radiation anti-interference testing system (including radar waves)
EMS Testing - Electrostatic Discharge
EMS Test - Transient Conducted Immunity Test
EMS Testing - Portable Transmitter Immunity
EMS Test - High Current Injection (BCI) Test
EMS test - low-frequency magnetic field anti-interference test
EMI Testing - Transient Conducted Emissions Testing System
EMI testing - low-frequency magnetic field emission
EMI Test - Radiation Emission Test
EMI Test - Conducted Emissions Test
Automotive Electronic Testing
Automotive Parts Inspection
Automotive ELV&VOC
Reliability testing
Temperature shock test
Vibration testing
Instrument panel/instrument panel three comprehensive vibration test
Comprehensive vibration test of door inner panel III
Sunvisor Three Comprehensive Vibration Test
Spoiler Three Comprehensive Vibration Test
Three comprehensive vibration tests of car front and rear bumpers
Three comprehensive vibration tests for lamp housing/lampshade
Comprehensive vibration test of outer circumference three
Automotive metal material testing
Performance testing of automotive lighting fixtures
Rapid temperature change test
Vibration
Common issues with vibration testing
Common issues with fatigue testing
Common issues with high and low temperature testing
Conducted Interference (CE) - Suzhou Lixun Standard
Electromagnetic Radiation Tolerance Test (RS) - Suzhou LCS Standard
Electrical Fast Pulse Withstand Test (EFT) - Suzhou LCS Standard
Voltage flicker test - Suzhou LCS standard
Electronic appliances
Household appliance product testing
Electrical accessory product testing
Household appliance testing
Chemical Testing
Introduction to PFAS Testing
MOSH/MOAH Mineral Oil Testing Service
MOSH/MOAH Mineral Oil Testing and Certification Report Service
Consumer Product Testing Services - WEEE Chapter
Ecological textile testing
Leather Footwear Inspection
Food contact material testing
Testing of toys and baby products
Hazardous substance testing
Electronic Cigarette Testing
Electronic cigarette detection
Reliability testing
Other tests - pencil hardness test
Mechanical testing - Packaging compression test
Climate environment testing - Xenon lamp aging test
Battery Testing
Power storage battery testing and certification
Consumer Electronics Battery Testing and Certification
power battery
Light electric vehicle batteries
Energy storage battery
Portable battery
Battery testing
battery test
Lamp Inspection
Inspection of ship lighting fixtures
COI Index Test for Medical Indoor Lighting
Lamp safety inspection
Luminaire energy efficiency testing
EMC testing of lighting fixtures
Integral Ball Laboratory
Photobiology Experiment
Light distribution test
Lamp aging test
Lamp IP waterproof
Lamp performance testing
Lamp reliability testing
Children's toy testing
Testing standards for toy products
China Certification
China's "national promotion" RoHS certification
China Energy Efficiency Label Certification
China Energy Conservation Certification
China CQC Certification
Tmall JD Quality Inspection Report
China SRRC Certification
Taiwan BSMI certification
Taiwan NCC certification
China CCC Compulsory Certification
Asia Certification
Vietnam certification
KC certification
KUCAS Certification in Kuwait
Singapore PSB certification
Iraq COC Certification
IMDA certification
VCCI Certification in Japan
JATE certification in Japan
PSE certification
BIS certification
Japanese TELEC certification
European Certification
RoHS certification
GOST certification in Russia
Russian EAC certification
Northern Ireland UKNI logo
Electrical ENEC certification
European D-MARK certification
Türkiye BTK certification
TSE certification in Türkiye
CE certification in Türkiye
RED certification
German TUV-SUD certification
CE-ERP certification
REACH certification
German GS certification
EU E-Mark certification
North American Certification
Ecuador VOC certification
Mexico NOM certification
IRAM certification
CPSC Certification in the United States
CSA certification
ASTM certification
FDA certification
CEC certification
ETL certification
ul certification
IC certification
Energy Star
FCC Certification in the United States
ASTM certification
Middle East Certification
Israel SII certification
Saudi SABER certification
GCC certification for the seven Gulf countries
Iran COI certification
Qatar COC Certification
Iraq COC Certification
Saudi EER Energy Efficiency Certification
Saudi SABER certification
Algeria PCA certification
PVOC certification
Australia Certification
New Zealand IC-F testing
VEET certification
LCP certification
GEMS certification
RCM certification
C-Tick certification
SAA certification
Africa Certification
Gabon COC certification
Algeria COC certification
Ethiopian VOC and COC certification
Mauritius VOC certification
Ghana COC certification
COC certification in Burundi
Zambia COC certification
Botswana COC Certification
Uganda PVOC certification
SABS certification in South Africa
South African LOA certification
Zimbabwe CBCA Certification
Nigeria SONCAP certification
Kenya PVOC certification
African COC certification
Other certifications
WEEE
Bluetooth BQB certification
IECEE registration
MHRA registration in the UK
TRAINING
Management system training
Laboratory technical training
Laboratory Process Consulting
Laboratory decoration construction
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Wireless Communication
Electromagnetic compatibility
Automotive Electronics
Automotive Parts Inspection
Electronic appliances
Chemical Testing
Electronic Cigarette Testing
Reliability testing
Battery Testing
Lamp Inspection
Children's toy testing
China Certification
Asia Certification
European Certification
North American Certification
Middle East Certification
Australia Certification
Africa Certification
Other certifications
TRAINING
Solutions
-
-
-
Automotive interior and exterior trim - Environmental testing
-
Automotive interior and exterior decorations (electronic and electrical components) - IP protection
-
Automotive electronic and electrical components - Electrical performance
-
Automotive interior and exterior trims - Mechanical performance testing
Contact Us
National 24-hour service hotline
400-116-2629
Group Headquarters
E-mail: webmaster@lcs-cert.com
Address: Shenzhen City, Baoan District, Shajing Street, Nga side of the school of Wei Juji Industrial Park, Building A 1 ~ 2 floor, Building C 3 floor
Electrical clearance
The structure of the appliance should ensure that the electrical clearance is sufficient to withstand the electrical stress that the appliance may experience. Determine whether it is qualified through the requirements and tests of 29.1.
According to electrical safety standards such as IEC 60335-1 or GB 4706.1, electrical clearance refers to the shortest distance measured by air between two conductive components. The design of electrical clearances must ensure that they can withstand the electrical stresses that appliances may encounter during normal use. The following is a specific explanation and testing method for this requirement:
1. Definition of electrical clearance
Electrical clearance refers to the shortest distance through air between two conductive components, used to prevent electrical breakdown or arc discharge.
2. Sources of electrical stress
The electrical stresses that electrical clearances may withstand include:
Working voltage: The voltage applied by an appliance during normal operation.
Transient overvoltage: Transient high voltage caused by switch operation, lightning strikes, etc.
Pollution level: Dust, moisture, etc. in the environment may reduce the insulation performance of electrical clearances.
3. Structural design requirements
To ensure that the electrical clearance can withstand electrical stress, the design must meet the following requirements:
Adequate distance: Ensure that the electrical clearance meets the standard requirements based on the rated voltage and pollution level.
Reasonable layout: Avoid too small spacing between conductive components, especially in high voltage areas.
Pollution prevention: The design should prevent the influence of dust, moisture, etc. on electrical clearances.
4. Testing requirements (according to clause 29.1)
Verify whether the electrical clearance meets the requirements through the following tests:
4.1 Electrical clearance measurement
Testing method:
Measure the shortest distance between two conductive components using measuring tools such as calipers and microscopes.
Ensure that the measured values meet the electrical clearance requirements specified in the standard.
Qualification criteria:
The measured value should be greater than or equal to the minimum electrical clearance specified in the standard.
4.2 Electrical Strength Test
Testing method:
Apply the specified test voltage on the electrical gap (usually twice the rated voltage+1000V, or according to specific requirements of the standard).
The test voltage lasts for 1 minute.
Qualification criteria:
No breakdown or flashover should occur.
The leakage current should be within the allowable range.
4.3 Transient Overvoltage Test
Testing method:
Simulate the impact of transient overvoltage (such as lightning strikes, switch operations) on electrical clearances.
Qualification criteria:
The electrical gap should be able to withstand transient overvoltage without breakdown.
4.4 Pollution level assessment
Testing method:
Determine the pollution level based on the usage environment (such as pollution levels 1, 2, 3).
Evaluate the insulation performance of electrical clearances in polluted environments.
Qualification criteria:
The electrical clearance should meet the requirements of the corresponding pollution level.
5. Standard reference
IEC 60335-1: Safety requirements for household and similar electrical appliances.
GB 4706.1: Chinese National Standard, equivalent to IEC 60335-1.
UL 60335-1: American standard, applicable to the North American market.
6. Calculation of electrical clearance
The minimum value of electrical clearance is usually determined based on the following factors:
Rated voltage: The higher the voltage, the greater the required electrical clearance.
Pollution level: The higher the pollution level, the greater the required electrical clearance.
Insulation type: The requirements for basic insulation, additional insulation, or reinforced insulation vary.
7. Testing equipment
Measuring tools: such as calipers and microscopes, used to measure electrical clearances.
Electrical strength tester: used to apply high voltage and detect breakdown or leakage current.
Transient overvoltage generator: used to simulate transient overvoltage.
8. Other relevant requirements
Creepage distance: Similar to electrical clearance, but refers to the shortest distance along the insulation surface, which must meet the requirements at the same time.
Double insulation or reinforced insulation: For Class II appliances, electrical clearances and creepage distances must meet the requirements of double insulation or reinforced insulation.
Through the above tests and evaluations, it can be ensured that the design of electrical clearances can withstand electrical stress, thereby ensuring the safety and reliability of the equipment.
Large-scale experimental base
Professional Lab
Analysis Method
Testing/year
WeChat Inquiry
Reservation
Contact Us
National 24-hour service hotline
Address：Juji Industrial Park, Xueziwei, Ngabian, Shajing Street, Baoan District, Shenzhen Building A 1~2F, Building C 3F
WeChat public number
Share industry dry goods
WeChat consultation
Please note consulting services
Follow Jitterbug
Mobile website
di complaint mailbox: customer.complaint@lcs-cert.com complaint telephone tel: 18126445450 certificate report verification of authenticity mailbox: verification@lcs-cert.com