How much does the insulation arc resistance tester cost

Insulator arc resistance testerSafety protection measures: (1) Overpressure protection

(2) Overcurrent protection

(3) Short circuit protection

(4) Security door opening protection

(5) Software misoperation protection

Insulator arc resistance testerMain application scope and functions:

This testing machine is suitable for GB1411-2002, IPC650, IEC 61621, ASTMD495 standards, and is suitable for JEC 149, UL 746A and other testing methods. The evaluation of arc resistance performance of electrical insulation materials such as plastics, resin adhesives, and insulating paints used in industries such as motors, appliances, and household appliances is mainly applicable to the testing of arc resistance performance of solid insulation materials such as plastics, films, resins, mica, ceramics, glass, insulating oil, insulating paints, cardboard, and other media; The arc resistance testing machine is computer-controlled, and the test curve can be observed online during the testing process; Automatically store test conditions and test results data, and can access, display, and print them. The test method described in this standard can provide preliminary differences in the tolerance of similar insulation materials to surface damage when exposed to high voltage, low current arc discharge.

Arc discharge causes local thermal and chemical decomposition and corrosion, ultimately forming conductive channels on insulating materials. The severity of the experimental conditions gradually increases: in the initial stages, the low current arc discharge is repeatedly interrupted, and in the later stages, the arc current increases step by step.

Due to its convenient operation and short testing time, this experimental method is suitable for preliminary screening of materials, checking the effects of changes in material components, and quality control inspections. Failure Failure

When a conductive channel is formed within the tested material, it is considered that the material has failed. If an arc causes a material to burn and the material continues to burn after the arc is cut off, it is also considered that the material has failed.

Note 1: When the arc discharge disappears due to deep penetration into the material, the circuit current usually changes and the sound changes significantly.

Note 2: For certain materials, the trend towards failure increases over a considerable period of time before all arcs between the electrodes are extinguished, and failure only occurs when all arcs have been extinguished.

Note 3: For certain materials, continuous sparks may be observed near the electrode after the arc has been extinguished. This type of spark should not be considered as belonging to the arc part.

Note 4: If the material continues to burn during the interruption of the arc, the combustion that occurs with the arc can only be considered as failure. In other cases, continue the experiment until a conductive channel is formed.

Note 5: Even if the material resumes arc discharge later, the failure is still considered as the second extinguishing of the entire arc.

3.2

Arc resistance

The total time from the start of the experiment until the failure of the specimen, in seconds.

4、 Equipment

4.1 Test Circuit

The main components of the electrical circuit of the experimental equipment are shown in Figure 1.

Note: The stray capacitance of the secondary circuit wiring should be less than 40pF. Large stray capacitance may interfere with the shape of the arc and affect the test results.

4.1.1 Transformer, TV

The rated secondary voltage (open circuit) of the transformer is 15kV, the rated secondary current (short circuit) is 60mA, and the line frequency is 48Hz~62Hz.

4.1.2 Variable ratio autotransformer, TC

The rated capacity is 1kVA and matches the line voltage.

Note: It is recommended to maintain a variation of ± 2% in the primary voltage power supply.

Normative reference documents

The clauses in the following documents become clauses of this standard by reference. Any referenced document marked with a date shall not be subject to any subsequent amendments (excluding errata) or revisions to this standard. However, parties to agreements based on this standard are encouraged to study whether versions of these documents can be used. Any referenced document without a date shall be subject to the version specified in this standard.

IEC 60112:1979 Solid insulation materials - Determination of residual current trace index and resistance to residual current trace index under humid conditions

IEC 60212:1971 Standard conditions for solid electrical insulation materials before and during testing

IEC 60587:1984 Test Method for Evaluating the Resistance of Electrical Insulation Materials to Leakage, Traceability, and Corrosion under Harsh Environmental Conditions