Some standard content:
GB 8871—2001
Articles 7.2.7 and 8.3.8, 7.2.8 and 8.3.9, 7.2.10 and 8.3.11 of this standard are mandatory, and the rest are recommended.
The implementation of GB8871-1988 "AC contactor energy saver and its application technical conditions" has made my country's AC contactor energy saver and other products have a unified standard, because GB8871-1988 mainly refers to the relevant provisions of the now abolished JB2455-1985 "Low Voltage Contactor", and it is different from the relevant provisions of the current GB14048.4-1993 "Low Voltage Switchgear and Control Equipment Low Voltage Electromechanical Contactor and Motor Starter" mandatory national standard. Therefore, it is necessary to revise it. In addition, with the production and development of energy savers, a variety of energy savers with protection functions have come out. Therefore, it is also necessary to add content related to protection performance in the standard. After this standard comes into effect, it will replace GB8871--1988 "Energy saver for AC contactors and their application technical conditions". IEC has no standard corresponding to this standard
This standard shall be implemented from November 1, 2002. This standard was proposed by the China Electrical Equipment Industry Association. This standard is under the jurisdiction of the National Low Voltage Electrical Equipment Standardization Technical Committee. The drafting units of this standard are: Gonghai Electrical Science Research Institute, Lexiao City Feiqian and Guan Factory, etc. The main drafters of this standard are Liu Bingzhang, Lin Lijie, and Liu Chao. 1 Scope
National Standard of the People's Republic of China
Energy saver For AC contactors
Energy saver For AC conlactorsGB 8871—2001
Replaces GB88711988
This standard specifies the electrical and mechanical performance requirements and corresponding test methods, inspection rules and marking requirements for AC contactor energy savers (hereinafter referred to as energy savers).
This standard applies to energy savers with a rated control power supply voltage of AC 50Hz and a rated operating voltage of 380V or less used in conjunction with AC contactors. The energy savers reduce the power consumption of the electromagnetic system of the AC contactor and reduce its noise and temperature rise. The energy savers can also have some protection functions for the main circuit of the AC contactor. This standard should be implemented under the conditions of ensuring the main technical performance, economic rationality and safety requirements of the matched AC contactors. The energy saving coils of the AC contactors and the energy saving technology used The AC contactor of this standard can refer to the relevant performance and inspection requirements in this standard. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is released, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the feasibility of using the latest versions of the following standards. (GI3/T2423.4—1993 Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method (enJFC60068-2-30:1980)
GB/2828-1987 Batch inspection counting sampling procedure and selection table (applicable to the inspection of non-connected batches) GB/T28291987 Periodic inspection counting sampling procedure and sampling table GB/T 2900.18—1992 Electrical terminology Low voltage electrical appliances (eqv1EC 50-441:1981) G13/T 4207—1984 Determination of comparative tracking index and proof tracking index of solid insulating materials under humid conditions (ncqlEC112:1979)
GB4824-2001 Measurement methods and limits of electromagnetic disturbance characteristics of industrial, scientific and medical (ISM) radio frequency equipment GB/T5169.1 (—1997 Fire hazard test for electric and electronic products - Glow wire test method and guide (idtIFC 69521/0:1994)
GB92541998Limits and methods of measurement of radio disturbances of information technology equipmentGB/T14048.1—2000General rules for low-voltage switchgear and controlgear (eqvIEC60947-1:1999)GB14048.4—1993Low-voltage switchgear and controlgearLow-voltage electromechanical contactors and motor starters (eqvIEC 60947-4-1:1990)
(3/T17626.2-~1998Electrical compatibility test and measurement technologyElectrostatic discharge immunity test (idt IFC 61000-4-2:1995)
GB/T17626.\1998Electromagnetic compatibility test and measurement technologyRadio frequency electromagnetic field radiation immunity test (id1 JFC 61000-1-3:1$95)
GB/T17626.4—1998 Electromagnetic compatibility test and measurement technology Electrical fast transient burst immunity test Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on November 21, 2001 2
Implementation on November 1, 2002
GB 8871—2001
(ilt.1FC: 61G00 4 4: 1995)
G13/T17626.5—1999 Electromagnetic compatibility test and measurement technology Surge (impact) immunity test (idt IEC 61000-4-5:1095)
3 Terminology and symbols
3.1 Terminology
The terms in this standard are all referenced from GB/12900.18.3.2 Symbols
The symbols appearing in this standard are as follows:
Comparative tracking index;
Active power saving rate;
The active power consumed by the electromagnetic coil of the AC contactor without a power saver in the holding state: the AC contactor with a power saver installed is in the holding state: the active power consumed measured at the input end of the power saver; Reactive power saving rate:
The reactive power consumed by the electromagnetic coil of the AC contactor without a power saver in the holding state; the AC contactor with a power saver installed is in the holding state, and the reactive power consumed measured at the input end of the power saver; The average cold temperature of the coil;
The average hot temperature of the coil;
The cold resistance of the coil:
The hot resistance of the coil! ,
4 Ratings and classifications
4.1 Ratings
4.1.1 The rated working voltage of the energy saver is AC 380V and 220V. 4.1.2 The rated insulation voltage of the energy saver is 380V. 4.1.3 The rated frequency of the energy saver is 50Hz
4.t.4 The rated working systems of the energy saver are as follows: a) Eight-hour working system
This working system is classified as the energy saver and the AC connector. When it is kept closed enough to make the energy saver reach thermal equilibrium, it must be disconnected for eight hours. The eight-hour working system is a basic working system. b) Non-stop working system
This working system is for the energy saver to keep the applicable AC contactor closed for more than eight hours (weeks, months) without breaking, c) Intermittent cycle working system
This working system is for the energy saver and AC contactor to be used together, and the closing time and the opening time have a certain ratio. Both times are very short, and the energy saver cannot reach thermal balance. The intermittent cycle working system is described by two parameters: the number of operating cycles per hour and the load factor. The load factor is the ratio of the power-on time to the cycle, usually expressed as a fraction, and its standard values are: 15%, 25%, 40% and 60%.
The number of operating cycles that the energy saver can complete per hour. That is, the operating frequency is divided into the following levels: Level 3
Level 120
3 times/h
12 times/h
30 times/h
120 times/h
Level 300
Level 600
Level 1200
300 times/h
600 times/h
1200 times/h
GB 8871—2001
One operation is a complete operation cycle, which includes one closing and one opening of the matching contactor. 4.2 Classification
4.2.1 According to the working principle:
a) Electric narrow type:
b) Transformer type;
c) Electronic type:
d) Residual magnetic type;
e) Permanent magnetic type:
f) Mechanical lock type;
g) Current limiting resistor type;
h) Others.
4.2.2 According to whether there is a protection function:
a) Without protection function;
h) With protection function.
4.2.3 According to the conversion device that converts to AC operation when there is a fault:) Without conversion device;
b) With manual conversion device.
4.2.4 According to the conversion auxiliary contact:
α) does not need to occupy the auxiliary contact of the AC contactor; b) needs to occupy the auxiliary contact of the AC contactor, but does not need to be adjusted; ℃) needs to occupy the auxiliary contact of the AC contactor, and needs to adjust or replace the contact parts. Note: The specific requirements for the adjustment or replacement of the auxiliary contact and other parts should be specified by the manufacturer of the power saver! In the relevant product technical documents (such as the instruction manual, etc.),
5 Marking
5.1 The power saver shall be marked with the following contents on a clear and visible surface by a method that is not easy to eliminate. a) Manufacturer name or trademark;
b) Model name and model;
) Product number or manufacturing date;
d) Rated voltage:
e) Applicable AC contactor model and rated current; f) Comply with the standard number.
5.2 Terminal marking
All terminals of the power saver should have clear markings: to guide users to connect correctly. If the main circuit (primary side loop) adopts the terminal wiring method, the incoming terminal is represented by 1, 3, 5, the outgoing terminal is represented by 2, 4, 6, or represented by "power side" and "load side" respectively. The terminal dedicated to the neutral line network should be marked with the letter "N". The auxiliary power supply terminal should be marked with "power supply" or represented by the letter "E.sn". The output contact terminal should be marked with two digits and the single digit should be sufficient for the function number. 1.2 represents the closed contact circuit, 3 and 4 represent the normally open contact circuit, and the switching contact element circuit terminal should be marked with 4
1, 2 and 1:
GB 8871—2001
The tens digit is the sequence number. The terminals of the same contact element should be represented by the same sequence number, and all contact elements with the same function should have different sequences.
The marking example of the output contact terminal is shown in Figure 1. The terminal with other functions should be clearly marked by the manufacturer. Unless the wiring method is clear, the manufacturer should provide a wiring diagram. Sequence number
Normally open-normally closed
Function number
Two normally open
Figure 1 Example of output contact terminal marking
Two normally closed
Changeover contact
The coil terminals are marked as A1 and A2. The coil tap terminals with common taps are marked in sequence A1, A4, etc. The terminals of the first winding of the double winding are marked A1, A2; the terminals of the second winding are marked B1, B2. 6 Normal working conditions and installation conditions
6. 1 Normal working conditions
6. 1. 1 Weekly air temperature
a) The upper limit of the weekly air temperature shall not exceed 140°C, and the average value within 24 hours shall not exceed +35°C; b) The lower limit of the ambient air temperature shall not be lower than -5°C. Note: When the ambient air temperature is high (>40℃ or below -5℃), the user should consult with the manufacturer. 6.1.2 Altitude
The altitude of the installation site shall not exceed 2000m.
6.1.3 Atmospheric conditions
The relative condensation of the air at the installation site shall not exceed 50% when the highest temperature is +40℃. A higher relative humidity can be allowed at a lower temperature. The average minimum temperature of the wettest month shall not exceed +25℃, and the average maximum relative humidity of the month shall not exceed 90%, and the condensation caused by temperature changes on the product shall be taken into account.
6-1.4 Pollution level
The pollution level is level 3.
6.1.5 Installation category (overvoltage category)
The installation category (overvoltage category) is summer category. 6. 1. 6 Shock and vibration
The shock and vibration conditions are specified in the specific product standards or negotiated by the user and the manufacturer. Wang
1 For general-purpose energy savers, unless otherwise specified in the product label or technical conditions, shock and vibration can generally be ignored. 5
GB 8871—2001
2 For printed circuit boards with electronic components or power savers that are sensitive to shock and vibration, the conditions for their removal and disassembly should be specified in the product standards or technical specifications.
3 Shock and vibration tests can be used as special tests. 6.2 Installation conditions
Normal installation conditions should be based on the manufacturer's installation instructions. If there are regulations on installation conditions or the performance of the power saver is significantly affected by the installation conditions, the installation conditions should be clearly specified in the product standards or technical specifications. 7 Technical requirements
7.1 Structural requirements
7.1.1 Materials
The energy saver shall be made of suitable materials that meet the use requirements and shall meet the relevant test requirements after being constructed. The electronic components and materials used in the circuit shall comply with the relevant national standards. The suitability of the selected materials can be verified by the following tests, which can be carried out on the energy saver and (or) its components. a) Moisture and heat resistance test:
b) Comparative tracking index (CTI) performance test of insulating materials; c) Abnormal heat resistance and fire hazard performance test. 7. 1. 1. 1 Resistance to humidity and heat: The energy saver should be able to withstand the assessment of alternating humidity and heat test (Dh). The test severity level is specified as follows: high temperature is 40°C. The number of test cycles is 6 hours. The energy saver should be tested under Db conditions. The temperature during the test is 25°C to 3°C. The relative humidity is controlled at 5% to 98% and condensation on the surface of the test product should be avoided. Before the end of the test, insulation resistance measurement is carried out, and then power frequency withstand voltage test is carried out. The withstand voltage test value is 2000V, the test time is 1min, and the insulation resistance value should be not less than 1Mα,
7. 1.1.2 Performance of resistance to abnormal heat and fire hazards The performance of the insulation material parts during work may cause them to be subjected to heat stress, and the insulation deterioration may damage the safety of the vehicle. The abnormal heat and fire hazards of these parts should not cause them to fail or endanger safety. The insulation materials used in the energy saver should be able to withstand the test assessment specified in 8.2.4.
7.1.1.3 Comparative tracking index (CTI) performance of the insulation material. The comparative tracking index (CTI) of the shrink material selected for the energy saver is specified as: T100. The (11) of the insulation material shall be verified by the test specified in 8.2.3. 7.1.2 Current-carrying parts and their connections
The current-carrying parts shall have the necessary mechanical strength and current-carrying capacity to meet the expected use requirements. The screws or nuts that transmit contact pressure are engaged in the metal butterfly pattern. The above requirements shall be verified by daily inspection and the test specified in 8.2.3. 7. 1. 3 Electrical clearance and creepage distance
Electrical clearance should be no less than 5.5mm; creepage distance should be no less than 6.3mm. 7.1.4 Terminals
7.1.4.1 Structural requirements for terminals
a) The terminals should be connected to the wires with screws or nuts and elastic connections or other equivalent measures to ensure that the necessary contact pressure is maintained permanently:
b) The structure of the terminals should ensure that the wires can be pressed tightly on the appropriate contact surface without damaging the wires and terminals: c) The structure of the terminals should not allow the (connected) wires to move, which is harmful to the normal operation of the energy saver or should not cause the insulation voltage to drop below the specified value:
7. 1. 4. 2 Connection of terminals
GB 88712001
a) When installing and connecting external wires, the wiring terminals should be easy to enter the well for wiring; b) The screws or nuts used for wiring should not be used for other purposes. 7.2 Performance requirements
7.2.1 Action conditions
When the energy saver is matched with the applicable AC contactor, the action conditions of the AC contactor should still meet the requirements of the action range specified in its product standards or technical conditions. 7.2. 2 Temperature
When the energy saver is tested under the conditions specified in 8.3.3, the measured temperature rise of the relay terminals and the contactor coil should not exceed 30K.
7.2.3 Dielectric properties
The dielectric properties of the energy saver are assessed by power frequency withstand voltage. When the energy saver is tested under the conditions specified in 8.3.4, it should be able to withstand a power frequency withstand voltage test of 2500 V effective value (the bed time is 5 seconds). s.
7.2.4 The making and breaking capacity of the contactor
When the energy saver is used in combination with the applicable AC contactor, the original making and breaking capacity of the AC contactor shall not be reduced. 7.2.5 The agreed operating performance of the contactor
When the energy saver is used in combination with the applicable AC contactor, the original agreed operating performance of the AC contactor shall not be reduced. 7.2.6 Life
When the energy saver is used in combination with the applicable AC contactor, its life number is: 10.30, 60.100.300, 600.1000 times.
The protective device of the energy saver with protection function shall have a life of 1000 times according to the test method specified in the product standard or technical conditions. The conversion device of the energy saver with manual conversion device shall be operated according to the conversion method specified in the product standard or technical conditions, and its life is 500) times. 7.2.7 Noise Nan
When the energy saver is used with the AC contactor, the noise of the operating electromagnet of the contactor in the closed holding state should not exceed 20dBA
7.2.8 Energy saving rate
The energy saving rate of the energy saver is divided into active power saving rate and reactive power saving rate. The active power saving rate is calculated by formula (1): AP
Where: .-
-The active power consumed by the electromagnetic coil of the AC contactor without energy saver in the idle holding state; (1)
PThe active power consumed measured at the input end of the energy saver when the AC contactor with energy saver is in the holding state. The reactive power saving rate is calculated by formula (2): 4Q == × 100%
Where: Q, the reactive power consumed by the electromagnetic coil of the AC contactor without the energy saver in the holding state; (2)
Q, the reactive power consumed measured at the input end of the energy saver when the converter contactor equipped with the energy saver is in the holding state. The energy saving rate of the energy saver is specified in the product technical conditions. The energy saving rate of its active power is divided into the following levels (see Table 1). Table 1 Active power saving rate
Active power saving rate
86AP90
GB 8871 2001
Table 1 (end)
The energy saving rate of its reactive power is divided into 2 levels (see Table 2) Table 2 Reactive power saving rate
7.2. 9 Protection performance
Energy saving rate of active power
70AP80
60≤AP70
50≤AP70bzxz.net
Reactive power rate
Energy saving rate The main circuit of AC contactor can have overcurrent, undervoltage, phase failure, leakage and other protection functions. The specific requirements of protection performance should be clearly defined in the product standards or technical conditions and should comply with the current relevant standards. 7.2. 10 Electromagnetic compatibility (EMC)
7.2.10.1 General requirements
For most relay products within the scope of this standard, it is considered to be used in the following two electrical environments, which are: a) Environment 1;
b) Environment 2,
Environment 1: Mainly related to low-voltage public power grid, such as: civil, commercial, light industrial places and (or) corresponding use environment. This environmental condition does not include occasions with higher disturbance sources, such as: arc welding machine. Environment 2: Mainly related to low-voltage non-public power grid or "industrial power grid", it involves the corresponding use places and environments. This environment includes high interference sources,
7.2. 10. 2 Immunity
7.2.10.2.1 Immunity of power savers without electronic circuits Under normal use conditions, power savers without electronic circuits are insensitive to electrical interference. Therefore, such power savers do not require mechanical immunity tests.
7.2.10.2.2 Immunity of power savers with only electronic circuits Power savers with electronic circuits are more obviously affected by electromagnetic interference. Such power savers should be verified by the tests specified in 8.3.11.
The judgment method for verifying whether the performance of the power saver meets the requirements should be specified in the relevant product standards or technical conditions. All passive electronic components (such as diodes, resistors, varistors, capacitors, surge suppressors, inductors, etc.) used in the electronic circuits of the power saver do not need to be tested,
7.2.10. 3 Emission
7.2.10.3.1 Emission of power savers without electronic circuits For power savers without electronic circuits, electromagnetic disturbance is only generated occasionally at the moment of electrical disconnection, and the disturbance interval is in the millisecond level. The above emission frequency, level and impact are sufficient to be part of the normal electromagnetic environment of low-voltage lines. Therefore, the requirements for electromagnetic emission of these power savers have been met, and it is not necessary to conduct power saver emission verification tests. 7.2.10.3.2 Emission of power savers with electronic circuits Power savers with electronic circuits (for example: power savers connected to switching power supplies and microprocessors with high-speed clocks) may generate continuous electromagnetic disturbances.
GB 8871 2001
For this type of power saver: its emission should not exceed the limits specified in the relevant product standards or technical conditions. For specific values, see Table 3 (emission level limits for environment 1) and Table 4 (emission limits for environment 2). The test is only carried out when the control circuit and auxiliary circuit have electronic components (with a basic switching rate of more than 9kHz). The specific test method should be specified in the product standards or technical conditions. Table 3 Emission limits for environment 1
Emission type
Radiated emission
Conducted emission
Frequency range MHz
s--23r
230-~1001
0. 15~-C. 5
Moving limit
30 (V/m quasi-peak value, at 10
37 c13(μV/m) quasi-peak value, at 10 m6V~ dV The quasi-peak value is limited in a linear relationship with the logarithmic frequency: 5eEBuV~16 dB average value
1) A lower limit should be used within the frequency range: 5dBV peak value
16dBV average value
6dBμV peak value
50dB average value
2) It can be measured at 3 m from the test object, and the limit is increased by 10 cL. Table 1 Emission limits for environment 2 Emission type Radiated emission Conducted emission Frequency range MHz 30~-230 230~-1 0Co 15 --0. 5 5~-3t? 1) A more approximate limit should be used at the transition point of the frequency range: 30 dB (uV/m) quasi-peak value. Measured at 30 m 37 dB (μV/m) quasi-peak value. Measured at 30 m m source mother\79dBm quasi-peak value
eBu average value
73dBV quasi-peak value
GOd13uV average value
3R quasi-peak value
60dBV average value
2) It can be measured at 3m away from the test product. The limit value increases by 10dB. Or it can be measured at 10 places away from the test product, and the limit value increases by 20dB. 8 Test method
8. 1 Test conditions
8.1.1 The test product shall comply with the drawings and technical documents approved by the prescribed procedures. Reference Standards
GB 1821--1995 Medium Level 11
Group 1 or G13 9254-1998
Medium Level
Reference Standards
GR48211996 Medium Level A
Group 1 or GH 92511998
Medium Level A
8.1.2 Each test item shall be carried out on a new energy saver matched with an applicable and typical AC contactor. Without affecting its equivalence, some test items may be carried out on the same test product. 8.1.3 Before the test, the energy saver may be operated several times under no-load or load conditions. 8.1.4 Test quantity, tolerance
In addition to the provisions in the test method, the test parameter allowable error provisions such as card voltage: ±5 circuit:
Power factor: 10.05;
Current: ±5%:
GB 8871-2001
For the convenience of testing, more stringent test parameters and test methods than those specified are also valid under the premise of the manufacturer's consent. 8.2 Verification structure requirements
8.2.1 Marking inspection and mark durability test Check whether the content of the nameplate, nameplate and related technical documents meets the requirements of Chapter 5. For the mark core on the housing of the energy saver or on the nameplate, use a piece of absorbent cotton soaked in distilled water to rub it back and forth 15 times in about 15 seconds, and then use a piece of absorbent cotton soaked in gasoline to rub it back and forth 15 times in about 15 seconds. The mark should still be easily recognizable. This test may not be conducted for signs manufactured by embossing, molding, etc. After all the tests specified in this standard, the signs on the housing or nameplate should still be easily recognizable without any warping. 8.2.2 Condensation heat resistance test
This test adopts Db test method. The requirements of the test chamber are in accordance with the provisions of Chapter 2 of GB/T2423.4-1093: During the test, the test sample should be installed in the normal position. The test conditions are in accordance with the severity level specified in 7.1.1.1 and GB/T2123.4-1993 Chapter 5 requirements for operation. About the test of the test product: The test should be carried out within the last 1h-~2h of the "low temperature and high temperature" stage during the conditional test. The temperature in the test box is 25℃, and the relative humidity is between % and 8%. Condensation should be avoided on the product to affect the test results. The measurement work should start with measuring the insulation resistance and then carry out the power frequency withstand voltage test. The measured insulation resistance value should not be less than 1.0M. The voltage value of the withstand voltage test should be 2000V, and the voltage should be applied for 1 second. min. 8.2.3 Determination of the comparative tracking index (CTI) of insulating materials The comparative tracking index of the insulating materials used in the energy saver shall be verified according to the test methods, test equipment and test procedures specified in GB/T1207.
The comparative tracking index (CTI) value of the insulating material shall not be less than 100. If the data obtained by the manufacturer from the insulating material manufacturer or other reliable parties can indeed prove that the TI value of the insulating material is greater than 100, this test may not be carried out.
8.2.4 Test for resistance to abnormal heat and fire hazards As for resistance to abnormal heat and fire hazards, the test shall be carried out on the energy saver or on appropriate parts removed from the energy saver in priority. However, in some cases, it is allowed to replace the test of the energy saver or its parts with the test of pre-selected materials. Parts made of insulating materials (except ceramic materials) of the energy saver shall be subjected to abnormal heat and fire hazard tests in accordance with the provisions of GB/T5169.4. The temperature of the top of the glow wire is as follows: a) Insulating material parts necessary to keep the current-carrying parts and grounding circuit parts in the normal position shall be tested at 960℃ ± 15℃, and the test duration is 30s ± 1s; b) Insulating material parts that are not necessary to keep the current-carrying parts and grounding circuit parts in the normal position, even if they are in contact with them, shall be tested at 650℃ ± 10C, and the test duration is 30s ± 1 s If two insulating material parts are made of the same material and the test temperature requirements are different, only one of the parts shall be tested at the higher temperature:
This tester is used to test part 1 of the test product. In case of doubt, the test is repeated with two test products. The glow-wire is applied once, and the test time is 30s and 1s. During the test, the bottom of the test product is placed in the most unfavorable position for expected use (the test surface is in a downward position). Considering the conditions under which the heating element or glowing element expected to be used may contact the test product, the top of the glow-wire should be applied to the specified surface of the test product.
The glow-wire test is considered to be qualified if the following conditions are met: 1) There is no visible flame and no continuous glow: 2) Within 30s after the glow-wire is removed: the flame on the specimen is extinguished or the glow disappears. C
GB 88712001
In addition, the thin paper under the test should not catch fire or the wood should not be scorched. For the relevant normal heat resistance ignition risk, the test shall be carried out on the energy-saving device or on suitable parts removed from the energy-saving device in priority. However, in some cases, it is allowed to test on pre-selected materials instead of testing the energy-saving device or its parts. 8.2.5 Measurement of electrical clearances and creepage distances
The calculation and measurement methods of electrical clearances and creepage distances shall be in accordance with Appendix A of G3/114048.1-2000, and their measured values shall comply with the requirements of 7.1.3.
8.2.6 Mechanical properties test of terminal
8.2.6.1 General conditions for test
Each. - The test shall first be carried out on the terminal of the intact and new energy-saving device. When round copper wire is used for testing, the round copper wire should comply with the relevant standards of Taiwan.
8.2.6.2 Mechanical strength test of the terminal During the test, the terminal of the energy saver is connected with 1.(mm and 2.5mm single-core hard copper wire. The wire is connected and removed 5 times each, and the tightening torque is 1.2 Nm.
After each test, the tightening screw (nut) is loosened and a new wire is used for the second test. After the test, the tightening device shall not be damaged or changed.
8.2.6.3 Accidental loosening and damage test of conductor (bending test) The maximum number of wires connected to the terminal of the energy saver is 2. The minimum cross-sectional area is 1.mm, the maximum cross-sectional area is 2.5mm, and the wire type is single-core hard copper wire.
According to GB/T 8.2.6.4 Pull-out test
The maximum number of wires connected to the power saver terminal is 2. The minimum cross-sectional area is 1.0mm2 and the maximum cross-sectional area is 2.5mm2. The wire type is single-core hard copper wire.
Test according to 8.1.8.1 of GB/T 14018.1-2000. 8.2.6.5 Capacity test of non-prefabricated round copper wire with maximum specified cross-section The wire connected to the power saver terminal is a single-core hard copper wire with a diameter of 2.5 mm, and the test is carried out according to 8.1.8.5 of (B/T14048.1-2000). 8.3 Verification performance requirements
8. 3. 1. Sequence (Procedure) Test Items
Energy saver has two sequence tests that should be subject to the assessment of sequence tests. Each sequence test should be carried out on the same group of new products according to the specified sequence test items a) and b). All sequence test items in the sequence test should not fail. 8.3.1.1 Sequence test items of sequence test 1 A) Temperature rise test (8.3.3);
b) Action condition test (8.3.2);
c) Dielectric property test (8.3.4).
8.3.1.2 Sequential test items of procedure test 2 a) Contactor connection and disconnection capacity test (8.3.5); b) Contactor agreed operation performance test (8.3.6), 8.3.2 Action condition test
The energy saver is connected to the applicable AC contactor and the following tests are carried out according to the state specified in the contactor product standard or technical conditions: 1) Tilt the contactor according to the unfavorable pull-in condition that the gravity direction of the moving part of the contactor is opposite to the direction of the electromagnet suction, and conduct the pull-in voltage value range test:
b) Tilt the contactor according to the unfavorable release condition that the gravity direction of the moving part of the contactor is the same as the direction of the electromagnet suction, and use 110%U to close the contactor for 5s to conduct the release voltage value test. 11
GB 88712001
Under the specified conditions, when breaking or connecting the coil circuit, the contactor should be able to open or close correctly and reliably. 8.3.3 Temperature rise test
The energy saver is connected to the applicable AC contactor and the rated working voltage is applied for the test. The test time should be long enough to allow the temperature rise to reach a stable value, generally not more than 8 hours. When the temperature change of the temperature measurement point does not exceed 1K per hour, the temperature rise can be considered to have reached stability. During the test, the test product should be installed as much as possible under normal use conditions and should be protected from abnormal external heating or cooling. At the end of the test, the temperature of the energy saver terminal and the contactor wire should not exceed 30K. For the electromagnet wire. Generally, the resistance method should be used to measure its temperature rise. Only when it is difficult to use the resistance method, other methods are allowed. Before the test begins, the difference between the coil temperature measured by the thermocouple and the temperature of the surrounding medium (air, oil, etc.) measured by the thermometer should not be greater than 3°C. The hot average temperature T of the coil can be obtained by the random relationship between its cold average temperature T and the ratio of the hot resistance R: to the cold resistance I according to formula (3):
(7:+ 234.5)-234.5
Where: TT is represented by C; RR is represented by Q. 8.3.4 Dielectric performance test
The energy saver should be installed on the metal chassis 1, and the rated test voltage specified in 7.2.3 should be applied for 1 min between the following parts: a) between each power supply input terminal of the energy saver and the mounting chassis respectively); b) between each output terminal of the energy saver and the mounting chassis respectively. For energy savers with fault switching devices, tests a) and b) should be carried out at each switching position. During the test, if there is no breakdown, flashover, obvious increase in leakage current or sudden drop in voltage, the test is considered to be qualified. 8.3.5 Contactor connection and disconnection capacity test. (3)
The power saver is matched with the applicable AC contactor and the test is carried out according to the requirements of the AC contactor product standard or technical conditions for the minimum switching capacity test.
8.3.6 Contactor agreed operating performance test The power saver is matched with the applicable AC contactor and the test is carried out according to the requirements of the AC contactor product standard or technical conditions for the agreed operating performance test.
8.3.7 Life test
The power saver is matched with the applicable AC contactor and installed and wired according to normal operation. During the test, the main circuit of the contactor is not energized. If lubrication is required in normal use,Lubricant can be added before the test. The energy saver should be applied with rated voltage and tested at the operating frequency specified in the corresponding intermittent cycle working system. In order to shorten the test cycle, it is also allowed to test with a higher operating frequency. The energization time of the contactor coil should be greater than the action time of the contactor, and the non-energization time should be long enough to ensure that the contactor stays at the two extreme positions. The number of life tests should not be less than the number specified in 7.2. Whenever the test reaches 1/10 of the specified life times, necessary lubrication and adjustment are allowed before continuing the test. We do not allow fraudulent replacement of parts.
After the life test, the energy saver should still meet the requirements of the action conditions in 7.2.1, and the parts used to connect the wires should not be loose. The conversion device that converts to AC operation when the energy saver fails shall be operated at a life test frequency of once per minute according to the conversion method specified in the product standard or technical conditions. After the life test, the energy saver should still meet the requirements of the action conditions in 7.2.1. The protective oxygen of the energy-saving device with protection function shall be subjected to life test according to the test method specified in the product standard or technical conditions. After the life test, the energy-saving device shall still meet the requirements of 7.2.1 action conditions and 7.2.9 protection characteristics. 8.3.8 Noise test
The noise test shall be carried out in a noise-absorbing test room. After the AC contactor used by the energy-saving device is closed, when the voltage applied to the energy-saving device changes between 85% and 110% of its rated voltage, the 12-volt meter measured by the level meter placed 400mm away from the end of the contactor core suction surface shall be placed 400mm away from the end of the contactor core suction surface.
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