JB/T 3703.2-1995 Test and measurement procedures for small general purpose electromagnetic relays

This standard specifies the test contents, procedures and methods for small general-purpose electromagnetic relays. This standard applies to the test of non-sealed small general-purpose electromagnetic relays (hereinafter referred to as relays) in circuits that control or switch AC voltages of 380V or DC currents below 220V and currents below 20A. This standard is a general basic test and measurement procedure for relays within the above scope. It can also be referenced for relays with or without the relays that do not fall within the above scope, but the referenced scope and chapters must be specified in the relay product standard. JB/T 3703.2-1995 Test and measurement procedures for small general-purpose electromagnetic relays JB/T3703.2-1995 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3703.2
1995-10-09
Ji Kui Ji
1996-01-01
Ji Kui Wa Yi Dao
This standard adopts the following standard documents of the International Electrotechnical Commission: IEC2551-00 All-or-nothing electrical relays; IEC255-0-20 Contact energy of electrical relays IEC 2555
IEC 255-7
IEC255-10
TEC68-2
Insulation test of electrical relays;
Test and measurement procedures for all-or-nothing electromechanical relays, application of IEC electronic component quality evaluation system to all-or-nothing relays; basic environmental test procedures.
1 Subject content and scope of application
This standard specifies the test content, procedures and methods of small general-purpose electromagnetic relays. JB/T3703.21995
JB42601986
This standard is applicable to the test of non-standard small-scale electromagnetic relays (hereinafter referred to as relays) that control or switch circuits with AC voltage below 380V or DC voltage below 220V and current below 2CA. This standard is the general basic test and measurement procedure for the above-mentioned relays, and can also be used for relays that do not belong to the above-mentioned specifications: but the scope and clauses of the reference must be clearly stated in the relay product label. 2 Reference standards
GB2298
GB2422
GB 2423. 1
GB 2423. 2
G3 2423. 4
GB 2423. 5
GB 2423. 6
GB 2423. 10
GB 2423. 21
GB2423.28
GR 2423. 29
GB 2900. 1Www.bzxZ.net
GB 2900. 17
JB/T 3703. 1
3 Terms
Terms and terms for vibration and shock
Terms and terms for basic environmental test procedures for electric and electronic products
Basic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic productsBasic environmental test procedures for electric and electronic products
Basic terms and terms for electrical terms
Test A: Low temperature test method| |tt||Test B: High acid absorption test method
Test IDb. Alternating damp heat test method
Test E, shock test method
Test Eb, collision test method
Test Fc, vibration (sinusoidal) test methodTest M; low pressure test method
Test T: Soldering test method
Test U: Terminal and body installation strength
Electrical terminology Relays and relay protection devices Small general electromagnetic maintenance appliances
The terms used in this standard are defined in GB2298, GB2422, GB2900.1 and GB2900.17. 4 Test conditions
Unless otherwise specified, all tests shall be carried out under the following specified conditions:
1995-10-09
1996-01-01
4.1 The standard atmospheric conditions for the test are: h) Ambient temperature: 15~35℃,
b) Relative humidity: 45%~75%,
Atmospheric pressure, 86~106kPa.
4.2 The standard power supply conditions for the test are: a) AC frequency: (50±2%) 112
JB/T3703.2
The period and random source peak-to-peak value of the DC power supply shall not exceed 1%; b)
The waveform of the AC power supply is a sine wave, and the waveform factor is between 0.95 and 1.25: Unless otherwise specified, the current or voltage of the AC power supply refers to the effective value. d
4.3 The arbitration conditions of the test are (i.e. when there is a dispute in the test): a) Environmental humidity: 20±2:
b) Relative humidity, 45%~75%:
c) Atmospheric positive pressure: 86~106 kPae
4.4 Unless otherwise specified, the contacts and other components shall not be cleaned or adjusted before the test. The time (about 2 hours) for the relay to be placed under the standard atmospheric conditions of the test shall be sufficient for the relay to reach thermal equilibrium. During the test, the relay shall comply with the specified installation method, 4.5 Instruments and meters for the test
a) The accuracy of the general instrument shall not be less than 0.5 level, and the electronic instrument shall not be less than 2.5 level: 6) The relative error of the instrument during measurement shall not be greater than 0.1%, c) The accuracy of other test instruments shall comply with the factory standards of the manufacturer. 4.6 Grouping and sequence of test items
The test items, grouping and sequence of the maintenance electrical appliance can generally be carried out according to the provisions of Table 1, and the specific provisions shall be determined by the enterprise product standards. Table 1
Appearance and dimension inspection
Mechanical adjustment parameter test and weighing
Figure DC resistance test
Action value basic value
Action time and return time test
Contact current
Insulation medium resistance
Dielectric strength
High temperature test
Low temperature test
Mixed heat test
Vibration test
Terminal strength
Test and measurement procedures Chapter 5 of this standard
Chapter 6 of this standard
Chapter 7 of this standard
Chapter 11 of this standard
Articles 12.3 and 12.6 of this standard
Chapter 10 of this standard
Article 9.2 of this standard
Article 9.3 of this standard Article
Chapter 13 of this standard
Chapter 15 of this standard
Chapter 14 of this standard
Chapter 20 of this standard
Chapter 19 of this standard
Recovery time
Contact maintenance
Low pressure
Strike voltage
Melting point Overload test
Power consumption
Temperature rise test
Weldability of lead terminal
Machine life test
Distributed capacitance
External magnetic field induction intensity
Temperature extreme range standard extreme value
Electrical life
Note, "Group 0" refers to the items that need to be tested in each group. 5 Appearance and Dimension Inspection
JB/T3703.21995
Table 1 (End)
Test and Measurement Preface
Article 12.4 of this standard
Article 12.5 of this standard
Chapter 16 of this standard
Chapter 21 of this standard
Article 9.4 of this standard
Chapter 21 of this standard
Chapter 8 of this standard
Chapter 17 of this standard
Chapter 22 of this standard
Chapter 16 of this standard
Chapter 23 of this standard
Chapter 26 of this standard
Chapter 25 of this standard
Chapter 27 of this standard Chapter
Chapter 23 of this standard
Under non-destructive test conditions, check whether the relay conforms to the external dimensions (including creepage distance and electrical clearance) and whether its structure and appearance conform to the requirements specified in the enterprise product standards. 5.2 Sequence
5.2.1. Use the daily measurement method to conduct an external inspection according to the requirements of the enterprise product standards to check whether the appearance of the relay is clean and neat, and whether there are physical defects on the surface. Physical defects include whether there are spots on the surface of metal parts in the relay, whether there are scratches, bumps, missing blocks, cracks, etc. on the surface of insulating parts, and they should conform to the requirements of the drawings. 5.2.2 The external dimensions, installation dimensions, creepage distance and electrical clearance of the relay shall be inspected according to the requirements of the enterprise product standards using the corresponding precision measurement.
5.2.3 The mechanical and electrical connections of each part of the relay are firm and reliable, and whether there is any looseness. 5.2.+ Check whether all solder joints in the electrical appliance are firm and whether there are any cold solder joints or false solder joints. 5.2.5 Check whether the connectors of the plug-in relay are properly connected, whether the mounting screws on the base are bent, and whether the threads are loose. 5.3 Requirements
a) Appearance inspection should be carried out under normal lighting and visual conditions; b) If there are serious defects or they cannot be described in words, you can take photos and record them with a camera. See Mechanical Adjustment Parameter Test and Weighing
JB/T3703.21995
Check whether the relay meets the various performance requirements of the design. 6.2 Mechanical Adjustment Parameter Test Package!
a) Contact pressure test;
b) Contact gap test;
e) Contact overrun test,
6.3 Contact pressure and contact intermagnetism test
6.3.1 The relay is in the non-excited (or energized) state, use a feeler gauge (or plug gauge) with a precision of not less than 2 levels: measure the time between all the moving-making contacts (or the time between the moving-breaking contacts being disconnected), and use a dynamometer with an error of no more than 10% to measure the force when all the moving-breaking contacts are closed (or the moving-making contacts are closed):
5.3, 2 When measuring the contact gap, use a feeler gauge (or plug gauge) to measure the minimum distance between the contacts. The feeler gauge (or plug gauge) should just pass through and not cause the contact piece to produce position instability. .
6.3.3 When measuring contact pressure, the force point of the dynamometer should be on the contact surface or end of the contact sheet at the contact, and the force direction of the dynamometer should be parallel to the normal direction of the contact sheet. The pressure of the end of the dynamometer at the melting point should be increased, and the instantaneous reading when the contact is just disconnected should be taken. In order to make the measurement, it can be indicated by the light signal (or meter) of the contact circuit under test; or other tests specified by the enterprise product standards.
West, contact overtravel test
5. . ! When measuring the moving contact, first slowly move the armature. When the contact begins to rise, use the light signal or meter to observe the contact until the armature light is fully closed. The distance the armature moves is the distance the armature moves. , then, use the standard push ruler selected in the travel broadcast diagram to convert the overtravel of the moving contact closure.
5.3,2 When measuring the moving break contact, first close the armature and then slowly release it. When the moving break contact starts to make contact (use a light signal or observe the contacts with a multimeter) until the armature is completely released, obtain the linear distance of the armature movement, and then convert the overtravel of the moving break contact closure according to the standard dimensions of the drawing,
6, to.3 or other test methods specified by the enterprise product standards. G. Relay weighing
Weigh with a gauge that the error is not greater than ±5%. 7 Line current resistance test
7.1 The DC resistance between the electrical wires of the self-
pick up the child within the specified 7.2 Procedure
7.2.1 The relay should be placed in the test environment temperature (20±2℃) for no less than 2 days before testing. 7.2. When testing the resistance of the line, the resistance of the entire circuit including the line input terminal should be included. 7.2.3 Test method
7.2.3.1 Safety method
Unless otherwise specified, the test method is:
a) Current relay line, test circuit is connected according to Figure 1, b) Voltage relay coil, test circuit is connected according to Figure 2) Calculate according to the following formula,
Wu Zhong R-line resistance,
Voltage across the seven Qian, V:
I-current through the line, A.
7.2. 3. 2 Bridge method
JB/T3703.2
A—Ammeter, adjustable current; RP—Sliding contact memory (adjustable resistor), voltmeter,—Test relay circuit diagram G—Power supply. a) Test according to the wiring and plug-in method in the bridge manual: b) Test the voltage relay circuit diagram DC single-arm bridge: ) Test the current relay coil resistance with a DC double bridge: 7.2.3.3 Resistance tester method
Test according to the wiring and use method in the instrument manual. The above three methods are applicable when the voltage difference range specified by the measured coil current resistance is met. If the volt-ampere method or resistance measuring instrument method cannot meet the accuracy requirements: the bridge method can be used instead. 7.3 Requirements
7.3.1 The reference temperature of the test environment is 20±2℃. When testing at non-reference temperature, the obtained value can be converted into the value under the reference temperature condition:
Conversion formula: R2D-1+K(t-20)
Where: R20——DC resistance value converted to 20℃, the test environment temperature, it is more
Rt—DC resistance value measured when the ambient temperature is t, n——resistance temperature coefficient (conductor K-0.004/C). (2)
7.2 When testing with the volt-ampere method, the voltmeter should be an internal voltmeter (it is recommended to use a digital voltmeter), and the ammeter should use a low internal resistance. 7.3.3 When testing with the U-ampere method, the voltage or current through the line should not be too large, and generally should not exceed the rated working voltage or rated working current of the relay. The passing time should not exceed 5 to avoid bacterial heating and increase the test error. 7.3.4 When the DC resistance of the relay coil under test is small, care should be taken to minimize the measurement error caused by the test wiring. 7.3. During measurement, the relay wiring should be protected from the influence of factors such as direct sunlight and other heat sources that may affect the measurement results. Power consumption test
8.1 The rated power consumption of the relay is tested to see if it is within the specified limit range. The rated power consumption of the DC device is expressed in W and the rated power consumption of the AC device is expressed in VA. B.3 Procedure
8.3.1 Connect the test circuit according to 7.2.3.1. 8.3.2 Apply the rated excitation specified in the enterprise product standard to the input end of the relay coil. 5
8.3.3 Calculate the power consumption according to the following formula:
JB/T3703.21995
Wherein, P.-line power consumption, W or VA: L coil voltage, V;
1.-current through the coil, A.
8.4 Requirements
a) The test environment temperature is 202℃, and the relay should be placed for no less than 2hl before the test.b) The voltmeter used for the test should be a high internal resistance voltmeter; the ammeter should be a low internal resistance ammeter. 9 Insulation performance test
9.1 Insulation performance test includes:
a) Determination of insulation resistance:
b) Dielectric strength test:
c) Impact voltage test,
9.2 Determination of insulation resistance
9. 2. 1 Purpose
To examine the insulation of each specified part of the relay and the resistance value presented when a certain direct voltage is applied. 9.2.2 Procedure
a) Test with an insulation resistance tester or equivalent or better test instrument; b)
The DC voltage level applied to the test end is selected according to Table 2: Table 2
Limited insulation medium voltage
260~500
>500~-1C00
e) The test voltage is applied to each test part according to the enterprise product standard: Measure according to the voltage level
d) The insulation resistance can only be determined when it reaches a stable value at least 5 days after the specified test voltage is applied. 9.3 Dielectric Strength Test
9.3.1 Purpose
To examine whether the insulating materials used in the maintenance appliance and the dielectric strength between the specified parts can withstand overvoltage within a certain period of time without breakdown, flashover and leakage current exceeding the standard. 9.3.2 Procedure
9.3.2.1 Use a test equipment that generates a sine wave of 45 to 65 Hz and a capacity of not less than 500VA. The size of the leakage current is specified in the enterprise product standard, and can generally be selected from the following values: 1, 5, 10mA. 9.3.2.2 The test voltage is applied to each test part in accordance with the enterprise product standard. 9.3.2.3 First adjust the open circuit voltage of the test equipment to 50% lower than the specified value, and apply it to the relay under test. The test voltage increases from this initial value to the specified value, and there should be no obvious transient phenomenon during the period. It should be maintained for 1 minute, and then it should be reduced to zero as quickly and smoothly as possible. 9.3.2.4 Check whether insulation breakdown and flashover occur under the specified hysteresis current value. 9.3.2.5 For sampling test or factory test, it is allowed to be 1.1 of the rated test voltage value specified in the enterprise product standard, and maintain 1 (it is allowed to use DC voltage test, but its value must be 1/2 times of the specified AC test voltage value). 6
JB/T3703.21995
9.3.2. When rechecking the dielectric strength test, the test voltage should be 75% of the specified value. 9.3.3 Requirements
9.3.3.1 When applying 50% of the specified voltage value to the relay under test, the voltage drop of the test voltage source should be kept less than 10%. 9.3.3.2 The accuracy of the power supply voltage shall not be less than 5%. 9.3.3.3 When testing exposed conductive parts, circuits with the same rated insulation voltage may be connected together. 9.3.3.4 The test voltage shall be applied directly to the relay terminals. 9.3.3.5 For relays with insulating housings, the external conductive parts shall be represented by a metal box covering the housing, except that appropriate gaps are left around the terminals to avoid flashover to the terminals. This requirement uses a metal insulation test and is only carried out for periodic type inspection and final type inspection.
9.4 Supplementary voltage test
9.4.1 The ability of the relay to withstand very high overvoltages for a very short time without damage shall be checked. 9.4.2 Procedure
9.4.2.1 The test shall be carried out using a generator that can produce an impulse voltage waveform. The basic technical parameters of the impulse waveform generator are as follows: a) Pre-time: 1.2μs±30%;
6) Half-value reduction time: 50μs±20%:
Voltage level: 0,1,5kV, tolerance is 10% e
d) Output impedance: 5000±10%;
Output energy: 0.5J±10%:
The length of each test line shall not exceed 2m.
9.4.2.2 During the test, the relay shall not be input with excitation. 9.4.2.3 The impulse voltage shall be applied to each tested part according to the enterprise product standards. 9.4.2.4 The test voltage shall be the open circuit voltage before the generator is connected to the relay, and 3 positive impulse waves and 3 negative impulse waves shall be applied respectively, with the interval time of each time not less than 5.
9.4.2.5 The test voltage level shall be specified by the enterprise product standards. 9.4.2.6 When the impulse voltage test is repeated, the impulse voltage is 60% of the specified value. 4.2.7 If flashover is found during the test, it cannot be used as a criterion for failure as long as it does not cause insulation damage. If flashover occurs, the insulation resistance and dielectric strength should be rechecked. 10 Contact resistance test
Determine the resistance presented when current passes through the contact circuit to judge whether the contact condition of the contact circuit is good. 10.2 Measure the contact resistance of the contact circuit. The contact resistance refers to the contact resistance of the entire circuit including the contact output terminal (such as contact, contact group, internal connecting wire, lead terminal).
10.3 Procedure
10.3.1 The relay is in the non-excitation state, and the contact resistance of all the break contact circuits is tested separately. 10.3.2 The relay is in the rated de-excitation state, and the contact resistance of all the make contact circuits is tested separately. 10.3.3 Test method
10.3.3.1 Excellent-ampere method
a) The test circuit is connected as shown in Figure 3:
b) During the test, the current applied to the contact circuit is specified as follows: when the rated current of the contact is not greater than 1A, the current of the contact circuit is the rated current of the contact; when it is greater than 1A, take 1A plus 10%. If there are other requirements, they should be in accordance with the provisions of the enterprise product standards, 7
A, current cut:
JB/T3703.2
R-adjustable resistor,
V. Voltage meter,
K Test contact:
G-power supply,
c) Adjust the resistance so that the current reaches the specified current of the melting point circuit: then connect the voltmeter to measure the voltage value: d) When the contact resistance of the contact circuit is measured with a DC power supply, it should be measured 3 times in two polarities, and the average value of each calculation is the maximum value. The calculation formula of the contact resistance of the contact loop is as follows: R
Where: R——Contact resistance, 0
I current value, A:
-: voltage value, Y.
10.3.3.2 DC effect arm electric correction method
Test according to the bridge manual and the method of use: 10.3.3.3 Low resistance tester or micrometer test method. Test according to the instrument manual and the method of use. 10.4 Requirements
10.4.1 The melting point shall not be purified before testing. 10.4.2 When testing according to the method in Figure 3, the voltage meter lead should be connected to the single side of the current meter lead, and the connection at each end should be in good contact. The connecting wire to the measured part should be thick and short to minimize the error caused by contact resistance and wiring resistance. 10.4.3 During the visual test, the contacts should be protected from current shock exceeding the specified value. 10%.4 The test voltage H should be applied after the contacts are stably closed and removed before the contacts are disconnected. Action value and return value test
Check whether the relay can complete its specified function when it is energized or de-energized. .2 Device treatment
11.2.1 The relay combustion test should be carried out according to the position specified by the manufacturer in the enterprise product standard. 1.2.2 Connect all the make contacts of the relay and the break contacts in series, and add a signal load (DC voltage is not more than 6V, DC current is not more than 0.1A), or each pair of contacts can be connected to a signal load. 11.2.3 Test circuit
a) The action value and return value test circuit of the voltage type relay should be connected as follows: 8
G-power supply
JB/T3703.2
E, Kin-make contact
Ga-power supply;
K2K 2break melting point
RP-eliminating contact micro-circuit (adjustable transformer), K-sensitive test circuit diagram, V-voltage calibration,
H-chair signal light.
The action value and return value of the current type relay are connected according to Figure 5. by
Gi--power supply,
R adjustable resistor:
V--voltmeter:
E,-Kin-moving closing point.
K2~Kn-moving breaking point
G2-power source,
K-tested relay line;
H-signal lamp,
11.2.4When the enterprise product label has requirements, the neck magnetization treatment shall be carried out according to its regulations. k.
11.2.5Suddenly apply excitation to the coil, and the coil voltage (or current) value when all contacts switch the circuit is the action value, and then increase the line excitation room rated value.
11.7.6 For the coil, the coil voltage (or current) value when all contacts switch the circuit is printed as the return value, and then the coil excitation is reduced to zero.
11.2.7 For AC relays, the action value and return value are tested repeatedly 5 times without changing polarity. For DC voltage relays, the polarity should be changed and the test should be repeated 5 times under different polarities.
11.3 If the above method is not used for testing, it should be specified separately in the enterprise product standard. 12 Time parameter test
12. January's
Check whether the relay and its contact time parameter values ​​are within the specified range. 12.2 Time parameter test includes:
a) action time:
b) return time;
c) jump time:
d) contact difference;
stable action time:
[) stable return time:
ε) bridge time +
h) conversion time.
12.3 Action and return time test
JB/T3703.2
12.3.1 Procedure
Measurement of action time, return time, bounce time, bridge time, relay stable action time, relay stable return time, conversion time. Figure 6 has given an appropriate circuit diagram, and the typical display on the oscilloscope screen is 7. 12.3.1.1 The relay test position is tested according to the position specified by the manufacturer in the enterprise product standard. 12 .3.1.2 Test method
a) Oscilloscope (it is recommended to use a long afterglow oscilloscope with external trigger and time scale): The test circuit is connected according to Figure 6
G1-excitation source,
K-contact of the output device under test
G-battery:
K-relay coil voltage
P-oscilloscope:
RR2H, R-unlit resistor
Y-vertical transfer,
S-no return switch
Recommendation t R, 1R, :R,R=1t21 2/31. Turn on the oscilloscope according to the instructions.
Close switch S, suddenly apply rated de-excitation to the relay coil, observe the track on the oscilloscope (refer to Figure 7) and test the time from the first closure of the make contact (or the opening of the break contact) to the melting point action time. Disconnect switch S, suddenly de-energize the relay coil, and observe the trace on the oscilloscope (refer to Figure 7). The time from the first disconnection of the make contact (or the closing of the break contact) is the contact return time. Repeat the relay test 10 times, and then calculate the arithmetic mean of the 10 measurements. b) Digital time test only, according to the instrument manual and usage method, the procedure is the same as the oscilloscope method. 12.3.2 Requirements
a) The fluctuation of the power supply voltage should not exceed 5%: b) When there is a dispute over the measured value, an oscilloscope should be used, and its time axis resolution should not exceed 0.1 mst) For relays with break-before-make contacts or make-before-break contacts requirements, appropriate test methods should be specified in the company's product standards:) Attention should be paid to the impact of multiple groups of contacts on the measurement results due to different contacts. 10
Break first and then
Melting point
First and then
Break contact
T-action time1
JB/T3703.2
T—recovery time,
One return time,
T,-fixed return timer
Ti—conversion time,
Note: The action time of the relay is T, and the return time of the relay is T212.4 Contact bounce time test
12.4.1 Procedure
T, stable action time
T,-correction time,
12.4.1.1 The test should be carried out on at least one specified contact group and use a resistor load. 12. 4.1.2 The test method is the same as that of Section 12.3. 12.4.1.3 Apply the test voltage or current specified by the enterprise product standard to the contact circuit. 12.4.1.4 Repeat the test 10 times. The average value of the 10 measurements is the contact bounce time. 12.4.2 Requirements
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