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Safety Testing

Product Electrical Safety Testing Services

We provide comprehensive product electrical safety testing services to ensure that your products meet international and domestic safety standard requirements, safeguarding user safety and product reliability. Testing covers a range of professional detection projects from high-voltage testing, insulation resistance to stability testing.

Electrical Safety Foundation Testing

Dielectric Voltage withstand test

High-voltage test is a mandatory test item required by international safety certification institutions. Products must be tested at a percentage before shipment. It is a quality assurance and electrical safety indicator for the product. The testing method is to apply an abnormal voltage higher than the normal working voltage to the product and maintain it for a certain period. Finally, it is determined that as long as there is no insulation breakdown, it can be considered that the test has been passed.

Insulation resistance test

Insulation impedance is applied between two related points with a direct current voltage, up to 1000 volts. It is usually measured in ohms and can be used to determine good and bad products.

Ground bond test

Ground bond test is a test to measure the grounding impedance of a product. It involves applying a constant current power supply to test the impedance between two points. Generally, products specify a test current of 25 amperes, with an impedance limit of 0.1 ohms. CSA requires a 40-ampere measurement for detection, which can identify issues such as loose grounding screws, insufficient grounding wire diameter, or grounding circuit breakage.

Leakage current test

It refers to the current that flows through the metal parts of a device that are in contact with the body to the ground or other contact points when the device is supplied with current.

Input test

Electrical safety input testing is conducted to examine whether the product design considers the input to meet the product's requirements during normal operation and whether the input circuit can withstand the current needed by the product. According to product standards, the maximum power consumption input current should not exceed 110% of the product's rated value. This rated value also informs users of the minimum current required for safe operation, allowing them to prepare the necessary electrical environment before using the device.

Stability testing of safety signs

For user safety warning signs, they must be stable and reliable, not becoming blurred due to use over time, which could lead to user errors and danger. Therefore, testing for stability is necessary. According to safety standards, this involves water testing for 15 seconds, followed by gasoline testing for 15 seconds, with the sign not becoming blurred.

Circuit Safety Testing

Capacitor discharge test

For a power cord that can be plugged and unplugged, the power cord is often pulled out of the socket, and the power plug is often played with or left casually. This can lead to a problem where the power plug is still live when pulled out, and the electricity dissipates over time. If this time is too long, it can cause an electric shock to the person playing with the plug or damage other devices or the device itself. Therefore, various whole-machine safety standards strictly specify this time. When designing products, we need to consider this time, and the product must be measured for this time during safety certification.

SELV circuit test

SELV circuit is a safety earth voltage circuit, which is safe for users. For example, the DC output end of a mobile phone charger to the phone, they are safe and can be touched arbitrarily without danger. SELV circuit requires meeting special requirements to be considered a SELV circuit. These requirements are that it still meets the SELV circuit requirements in the event of a single fault.

Limit power source circuit test

Due to the limited power output of the limit power source circuit, it is unlikely to cause a fire hazard. Therefore, in safety standards, special requirements are made for the shell of such circuits. Their flame retardancy rating is UL94V-2. As a result, all such circuits need to be measured to prove that they are limit power source circuits.

Limit current source circuit test

People who have worked with electricians know that after passing through a certain resistor, the AC220V circuit is no longer dangerous to people. So, what is the right size of the resistor, and what are the requirements for the resistor? This may be unknown to many people. In safety standards, there are specifications for this, which is the limit current source circuit. The limit current source current requires that the current flowing through the circuit under normal conditions and in the event of a single fault is below the safe limit, posing no danger to people less than 0.25mA.

Mechanical and Environmental Safety Testing

Ground continuity test

People who have worked with electrical installations know that some devices must be grounded, otherwise there may be dangerous voltages on their touchable surfaces. These dangerous voltages must be discharged through grounding. Safety standards specify the current and time required for testing, and the measured resistance must be less than 0.1 ohms, or the voltage drop must be less than 2.5V (if this value is applicable).

Moisture test

Moisture testing is to simulate a device's safety performance in extreme environments. After manufacturing, the device should be able to operate safely in any humidity level, without being affected by rainy seasons or high humidity, which could prevent users from using the device. Therefore, in the design phase, it is essential to consider that the device meets safety requirements in foreseeable humidity levels. Moisture testing is therefore necessary. Testing requirements may vary slightly depending on the standard.

Torque test

Torque testing is to test the number of bends a conductor can withstand on the external wires of a device during use, without breaking due to external force作用 during the product's lifecycle, posing dangers such as exposed AC220V wires.

Stability test

During normal use, devices may encounter various external forces, such as: higher devices where people may lean against them, or maintenance personnel climbing them; shorter devices with a bench-like shape where people may stand on them. Due to these external forces, devices may not be designed with full consideration, leading to dangers such as collapse or overturning. Therefore, these tests are necessary after device design to ensure they meet safety requirements.

Enclosure strength test

During the use of the device, various external forces may act on it, causing the enclosure to deform. These deformations may pose dangers inside the device or fail to meet certain indicators. Therefore, these influences must be considered during device design, and these indicators must be tested during safety certification.

Drop test

Small devices or desktop devices may fall from the hand or workbench to the ground during normal use. These falls may cause safety indicators inside the device to fail to meet the requirements. Therefore, these influences must be considered during device design, and these indicators must be tested during safety certification. The requirement is that after the device falls, the function can be lost, but it should not pose a danger to the user.

Stress release test

If a device has dangerous circuits internally, during normal use, if the enclosure deforms, causing dangers to be exposed, this is not allowed. Therefore, these influences must be considered during device design, and these indicators must be tested during safety certification.

Battery charge and discharge test

If a device has rechargeable batteries inside, charge and discharge testing, as well as charging testing and overcharging testing under single fault conditions, is required. This is because during normal use, charging and discharging, as well as faults in the device where the main function has not been lost, users may not be aware of the device's faults. In such situations, charging and discharging must be safe, and explosions or other dangers must not occur.

Temperature and Material Safety Testing

Device temperature rise test

In safety testing, temperature rise testing is the most important. Although the test uses equipment instruments and artificial climate environment testing is the same, the examination items and test components and purposes differ greatly. Artificial climate environment mainly examines the adaptability and reliability of the device. While safety standards examine whether the device can work safely.

Ball press test

As an insulating material or plastic part that supports dangerous voltage, ball press testing is required to ensure that the plastic part has sufficient support strength when the dangerous voltage component is working at high temperatures. The test temperature is the highest temperature plus 15℃, but not less than 125℃. The ball press time is 1H at the required temperature.

Testing Standards

GB8898,GB4943,GB4706….,IEC/EN62368,IEC/EN62133,IEC/EN60335,IEC/EN61558,UL62368,UL1310,UL8750…