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IEC60990 Figure 5 Touch Current Measuring Network, Convenient to Use
Applicable object:
1. Inspection of electrical products in the national entry exit
inspection and Quarantine (commodity inspection) system;
2. The quality inspection department of electrical products under
the state quality and technical supervision;
3. Electrical products certification institutions in Chinese
mainland abroad.
4. Domestic social laboratories and certification institutions of
electrical products;
5. Inspection Department of foreign professional electrical
appliance manufacturers;
6. Quality inspection department and production process quality
control department of domestic professional electrical appliance
manufacturers
Selection of materials and technology:
1. The resistor has the characteristics of high precision and high
power, high voltage and low temperature drift resistor
2. The capacitor with long-term stable and reliable capacitance,
high voltage resistance, non inductive, current shock resistance,
microwave absorption performance and very small leakage current is
adopted
3. The module steam injection adopts packaging solids with high
pressure resistance, good high frequency characteristics and low
dielectric loss. After pouring in the module, it has large heat
capacity and enhances the ability to resist short-term impact
current
4. In order to ensure the effective measurement of various
components, the surface connection method is adopted, which can be
disconnected from each other for the measurement of components; The
surface shall be provided with effective component identification
and wiring identification
Products Introduction:
This test network conforms to the measuring network requirements of IEC60990 touch current and the measurement method of protective conductor current, (figure 5-mesuring network, touch current weighted for let-go. This network is convenient to use and easy to operate, and the power supply switch is made separately, which can solve the shortcomings of power supply capacity of the previous machine and can test the more powerful products.
Parameter:
Name | Value |
RS | 1500Ω |
RB | 500Ω |
CS | 0.22μF |
R2 | 10000Ω |
R3 | 20000Ω |
C2 | 0.0062μF |
C3 | 0.0091μF |
Preparation:
Before testing, you need to prepare instruments as follow:
Oscilloscope x1
One or ten times the voltage probe x1
Power supply x1 (the test voltage or frequency that can be adjusted
or changed to the required voltage or frequency)