This standard specifies the verification items and technical requirements, verification instruments, verification methods, verification results and treatment of enameled round wire low-odor film continuity tester. This standard is applicable to the verification of enameled round wire low-voltage film continuity tester. JB/T 4279.12-1994 Verification method of enameled winding wire test equipment Low-voltage film continuity tester JB/T4279.12-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Verification Method of Enameled Winding Wire Test Instrument and Equipment Low-voltage Paint Film Continuity Tester
1 Subject Content and Scope of Application
JB/T4279.12-94
Replaces JB4279.12-86
This standard specifies the verification items and technical requirements, verification instruments, verification methods, verification results and processing of enameled round wire low-voltage paint film continuity tester.
This standard is applicable to the verification of enameled round wire low-voltage paint film continuity tester. 2 Reference Standards
JB/T4279.1 General Rules for Verification Method of Enameled Winding Wire Test Instrument and Equipment 3 Verification Items and Technical Requirements
3.1 The effective length of the felt electrode of the tester should be 20±2mm. 3.2 The test voltage should be DC 50±3V.
The speed of the sample passing through the felt electrode should be 15±1m/min. 3.3
3.4The detection sensitivity of the tester shall comply with the following provisions: a.
When the insulation resistance of the sample is less than 10kN, the relay shall operate within 0.04$; b.
When the insulation resistance of the sample is greater than or equal to 15kN, the relay shall not operate; c.
The counter does not indicate defects greater than 10 per second, which are detected by the continuous defect output circuit. The tester shall have a separate continuous defect detection circuit and continuous defect display. 3.5
The maximum reset time allowed by the counting device of the tester is 0.02s. 3.6
The force applied to the sample in the tester shall not exceed 0.03N. 4 Calibration instruments
4.1 Vernier caliper 125mm, graduation value 0.02mm. 4.2 DC voltmeter, 0.5 level.
4.3 Tachometer or stopwatch, tachometer graduation value 0.1m/min; stopwatch graduation value 0.1s. 4.4 Q-1 enameled wire test instrument (Q-1 instrument for short). Tension meter, 0.1N, graduation value 0.01N.
5 Verification method
5.1 Measure the length of the felt electrode with a vernier caliper. 5.2 Measure the test voltage between the felt electrode and the traction wheel with a DC voltmeter. 5.3 Determine the speed at which the sample passes through the felt electrode. 5.3.1 Directly measure the speed at which the sample passes through the felt electrode with a tachometer. 5.3.2 Start the tester, use a stopwatch to record the number of revolutions n of the traction wheel in time t, use a vernier caliper to measure the diameter D of the traction wheel, and calculate the sample speed according to formula (1):
Approved by the Ministry of Machinery Industry on December 9, 1994
Implementation on June 1, 1995
JB/T4279.12-94wwW.bzxz.Net
60X3.14D.n
Where: V-the speed of the sample passing through the felt electrode, m/min; D--diameter of the traction wheel, mm;
t time, s;
Number of revolutions of the traction wheel in time t.
5.4 Determine the defect detection sensitivity of the tester, connect the two leads of the pinhole output of the Q-1 instrument between the felt electrode and the traction wheel respectively, adjust the on-time of the test voltage according to the table below, and check whether the counting indication of the tester meets the table below. Insulation resistance
Test voltage
50±3V
50±3V
5.5 Check continuous defect detection circuit and display performance Action time
0.04±0.005 s
Any length
Relay state (counter)
Action (count)
No action (no count)
5.5.1 When the tester complies with Articles 3.1, 3.2, 3.3 and 3.4 of this standard, it is allowed to conduct continuous defect simulation test with artificial defects at a test voltage of 50V.
5.5.2 Create an artificial defect on the sample, start the tester, and the instrument should count the defects. 5.5.3 Create two artificial defects on the sample with a distance of 5±1mm, start the tester, and the instrument should have a continuous defect display. 5.6 Determine the reset capability of the counting device of the instrument. According to Article 5.5.1 of this standard, make two artificial defects 30mm apart on the sample, start the tester, and the instrument counts the defects.
5.7 Determine the force on the sample in the tester. 5.7.1 Install a sample with a nominal diameter of 0.050mm, start the tester, and use a tensiometer to measure between the felt electrode and the traction wheel. 5.7.2 If the guide wheel between the felt electrode and the traction wheel rotates flexibly, the wire end originally connected to the traction wheel can also be connected to a load of 0.03N and hung on the guide wheel. If the sample can be pulled, it is considered to meet the provisions of Article 3.7 of this standard. 6 Handling of verification results
6.1 A verification certificate will be issued to the low-voltage paint film continuity tester that has passed the verification, and a verification result notice will be issued to the unqualified one. The cover templates of the verification certificate and verification result notice are shown in the appendix of JB/T4279.1. 6.2 The calibration cycle of low-voltage paint film continuity tester is generally set at 1 year. Additional remarks:
This standard is proposed and managed by Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Zhu Bing.
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