JB/T 7103-1993 General technical requirements for coils used in relays and their devices
Some standard content:
JB/T7103-1993
General Technical Conditions for Coils Used in Relays and Their Devices Machinery Industry Standard of the People's Republic of China
General Technical Conditions for Coils Used in Relays and Their Devices 1 Subject Content and Scope of Application
This standard specifies the technical requirements, test methods and inspection rules for coils used in relays and their devices. JB/T 7103-1993
This standard applies to coils used in relays and relay protection devices as a basis for design, manufacture and inspection. This standard also applies to coils used in power system safety automatic monitoring devices, and coils of other similar products can also be used for reference. 2 Reference standards
Basic environmental test procedures for electric and electronic products Test Db: Alternating damp heat test method Basic environmental test procedures for electric and electronic products GB2423.16
Test J: Long berry test method
GB2643
GB2829
GB5169
GB7261
3 Environmental conditions for use
General environment
Electrical insulation Solvent-free paint test method
Periodic inspection counting sampling procedure and sample table Fire hazard test for electrical and electronic products
Needle flame test method
Basic test method for relays and relay protection devicesa. Ambient temperature: -25~50℃:
b. Atmospheric pressure: 80~110kPa:
c. Relative humidity: The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is 25℃. 3.2 Hot and humid environment
a. Ambient temperature: -5~40℃;
b. Atmospheric pressure: 86~106kPa:
c. Relative humidity: The average maximum relative humidity of the wettest month is 95%, and the average minimum temperature of the month is 25℃. 4 Technical requirements
4.1 Appearance quality
4.1.1 The coil should be arranged evenly, tightly and neatly, with no obvious convex and concave appearance, and the outer diameter should meet the requirements of the drawing. 4.1.2 For wires wound with electromagnetic wires with a diameter of 0.6mm or more, winding should generally be adopted, with clear layers and no stacking between turns.
4.1.3 The skeleton should not be cracked, damaged or obviously deformed. 4.1.4 The welding of the welding piece (or lead) and the electromagnetic wire used for the coil should be firm and without cold welding, and neutral flux should be used. The welding point should be smooth. Approved by the Ministry of Machinery Industry on October 8, 1993
Implemented on January 1, 1994
JB/T71031993
No sharp corners are allowed. After welding, alcohol should be used to remove the residual flux and insulation wrapping should be carried out. 4.1.5 The lead wire or lead sheet must be firm, and the outer wrapped end should be glued firmly. 4.1.6 The paint-impregnated coil must be soaked and dried, with no accumulated paint and bubbles on the surface. 4.1.7 The coil mark should be consistent with the corresponding drawing. 4.1.8 For coils with tapped windings, the arrangement position of the tapped lead wires should comply with the requirements of the drawing and be easy to identify. 4.2 DC resistance deviation
The DC resistance should comply with the requirements of the drawing. When there is no requirement in the drawing, the allowable voltage coil resistance value deviation is ±10% of the design given value. 4.3 Turns deviation
When there is no requirement in the drawing, under the condition of ensuring the resistance value, the allowable deviation of the number of turns is: ±4% of the specified number of turns for DC coils and ±2% of the specified number of turns for AC coils. AC coils are not allowed to have inter-turn short circuits. 4.4 Dielectric strength
4.4.1 The dielectric strength between the coil and the core shall be able to withstand the 50Hz AC test voltage value (effective value) specified in Table 1 for 1 minute without insulation breakdown or flashover. 4.4.2 The insulation between the coil windings and between the primary and secondary winding shielding layers shall be able to withstand the 50Hz AC test voltage value (effective value) specified in Table 1 for 1 minute without insulation breakdown or flashover. 4.4.3 The line diagram with the holding winding, the dielectric strength between the holding winding and the working winding shall be specified by the enterprise standard. Under the alternating damp heat test conditions, the coil dielectric strength test voltage value is 75% of the specified value. 4.4.4
Rated
Insulation voltage of coil
>30~60
>60~250
>250~500
Rated voltage of coil
220，127，110，100
220，110
Withstand voltage between windings
Note: The dielectric strength of small relays used in automatic control is specified by the product enterprise standard. Withstand voltage between coil and core
Withstand voltage between coil winding and shield
4.4.5 In the production process, it is allowed to shorten the duration of applying the test voltage value to 1, but at this time the test voltage value should be increased by 10% compared with the specified value.
4.5 Insulation resistance
4.5.1 Under the specified standard test conditions, the insulation resistance between the coil and the core and between the winding and the shielding layer shall not be less than 300MQ.
4.5.2 For coils used in general working environment conditions, the insulation resistance between the coil and the core and between the winding and the shielding layer shall not be less than 4MQ after the alternating damp heat test at a temperature of 40℃ for 2d (48h). 5.5.3 For coils used in damp and hot working environment conditions, the insulation resistance between the coil and the core and between the winding and the shielding layer shall be specified by the product standard after the alternating damp heat test at a temperature of 40℃ for 12d (288h). The alternating damp heat test is evaluated together with the product, and the test method is carried out in accordance with the requirements of GB2423.4. 4.6 Berry fungus resistance
For coils used in damp and hot environment conditions, after a 28d mold test, the insulation resistance shall not exceed the secondary long toxicity requirements specified in GB2423.16. 432
Technical requirements for main parts of coils
5.1 Skeleton
a. The main dimensions shall comply with the requirements of the drawings;
JB/T7103-1993
b. Sufficient mechanical strength, and the assembly shall not be affected by deformation after winding: no deformation at a temperature of 105℃, and the heat-resistant temperature of the coil skeleton for wet and tropical areas shall not be lower than 120℃: c.
d. Have a high volume resistance, and the volume resistance of the skeleton material is required to be greater than 1010Q/cm under the conditions of a temperature of 15-35℃C and a relative humidity of 45%75%:
Have good solvent resistance, no swelling, deformation, or cracking in contact with organic solvents, and have flame retardancy. e.
5.2 Wire
Enameled wire, it is recommended to use the wires listed in Table 2. Table 2
Polyester enameled round copper wire
Polyurethane enameled box wire
Acetal enameled round copper wire
Polyesterimide enameled round copper wire
It is recommended to use the wires listed in Table 3.
Silk-covered wire,
Double glass-covered steel wire
Silicone organic paint double glass-covered toothed copper wire
Main purpose
Applicable to general coils
Applicable to fine wire coils
Applicable to general wire separation
Applicable to wires with higher heat resistance
5.2.3 High-strength enameled resistance alloy wire, selected according to product design requirements. 5.3 Lead-out wires and lead pieces
5.3.1 Lead pieces are selected according to the following principles:
a. When the wire diameter of the coil is between 0.20.6mm, lead pieces are suitable: Heat-resistant temperature
Heat-resistant temperature℃
b. When the diameter of the coil wire is less than 0.2mm, the lead piece is best placed at the end of the skeleton and fixed with insulating material, and cannot be pressed by the enameled wire. The lead piece is allowed to be fixed arbitrarily or fixed after adding a transition wire with a nominal cross-section of 0.2mm2 insulated wire. 5.3.2 Lead-out wires
The lead-out wire of the coil or winding is selected according to the provisions of Table 4 and Table 5. Table 4
Diameter of coil wire d
0.1≤d<0.6
Use a nominal cross-section of not less than 0.06~0.2mm multi-strand insulated soft wire. Use a nominal cross-section of not less than 0.2mm multi-strand insulated soft wire directly led out from the coil wire
JB/T7103-1993
Lead-out wire name
RV multi-strand polyvinyl chloride soft wire
JBF butyl polyvinyl chloride composite Insulated wire
AF-200 fluoroplastic insulated installation wire
Multi-strand glass fiber covered wire
5.3.2.2 The insulation and marking of the lead wire shall meet the following requirements: Use
General coil
For unpainted coil
a. When the coil or winding wire is directly used as the lead wire, the part leading to the outer end of the coil shall be insulated with a polyvinyl chloride insulating sleeve as the insulation of the lead wire:
b.When the wire is turned or the winding is used as the lead-out wire through the transition wire, the transition wire generally adopts RV multi-strand polyvinyl chloride insulated soft wire, and a certain distance should be ensured between the transition lead-out wire joints of each winding: c. For coils that require varnishing, the lead-out wire adopts the insulated wire suitable for varnishing conditions in Table 5, and uses a polytetrafluoroethylene insulating sleeve as the insulation of the lead-out wire:
d. The color marking of the insulating bushing of the lead-out wire of the coil or winding, the shielded lead-out wire is white. When there is a polarity requirement, the beginning of the coil or winding is brown and the end is blue.
5.4 Interlayer insulation
5.4.1 For voltage coils or small current coils, interlayer insulation can be added to arrange the wires neatly, and the insulating material used should be flat, smooth and soft. 5.4.2 For multi-winding coils, two layers of insulation should be placed between the windings. 5.5 Shielding layer inside the coil
5.5.1 The shielding layer is generally made of tin foil or other metal foil. Its width shall not exceed the width of the coil frame window. It is set up in a layer between the primary and secondary windings without being closed. The insulation between the windings must be strengthened. The shielding layer can also be made of a layer of enameled wire with a wire diameter of not less than 0.2mm, with one end leading out and the other end insulated and closed in the coil.
5.5.2 If there are no other regulations, an insulated wire with a nominal cutting area of not less than 0.2mm2 is generally used as the lead-out wire of the shielding layer. It is required that the shielding layer and the lead-out wire are reliably connected.
6 Paint
6.1 Dipping paint is generally divided into:
a. Vacuum pressure dipping paint (applicable to fine wire coils): b. Hot dip paint (applicable to general coils): c. Pressure dipping paint (applicable to coils wound with wires with a wire diameter of 0.1mm or more). 6.2 Commonly used dipping paints are shown in Table 6.
JB/T7103—1993
Name of paint
Amino insulation baking paint
Epoxy ester insulation baking paint
Epoxy solvent-free paint
Epoxy polyester phenolic paint
Gray epoxy ester insulation paint
Epoxy solvent-free paint
A30--1
H30—2
5152—4
H30--3
9101-1
Heat-resistant temperature
6.3 For coils used in hot and humid environments, it is generally required to dip in paint twice, or dip in paint once and then paint once. After the coil is dipped in paint, apply another layer of anti-berry paint on the surface.
Test method
Test environment conditions
If there are no other provisions, the test environment conditions shall meet the following requirements: a. Ambient temperature: 15~35℃:
b. Relative humidity: 45%~75%:
c. Atmospheric pressure: 86106kPa.
7.2 Appearance inspection
a Spot check the size of the skeleton and the size of the wire: b. Carry out in accordance with the requirements of Article 4.1.
7.3 Electrical parameter inspection
7.3.1 Use a bridge to measure the resistance of the coil in Article 4.2. 7.3.2 Use a turns meter to measure the number of turns of the coil in Article 4.3, and use a short-circuit turn tester to measure the short-circuit turns of the coil. In special cases, the inductance measurement method can be used for inspection.
7.3.3 Article 4.4 dielectric strength test shall be carried out in accordance with the requirements of Article 20.4.1 of GB7261. When checking the dielectric strength between the coil and the iron core, the coil can be set on the sample iron core. 7.3.4 Article 4.5 Insulation resistance measurement shall be carried out in accordance with the requirements of Article 20.4.2 of GB7261. When checking the insulation resistance between the coil and the iron core, the coil can be set on the sample iron core, and the test instrument shall be selected according to the following requirements: a. For coils with a rated insulation voltage greater than 250V and not less than 500V, an instrument with a voltage level of 1000V shall be used for measurement: b. For coils with a rated insulation voltage greater than 60V and not more than 250V, an instrument with a voltage level of 500V shall be used for measurement; c. For coils with a rated insulation voltage not more than 60V, an instrument with a voltage level of 250V shall be used for measurement. 7.3.5 The mildew resistance test shall be carried out in accordance with GB2423.16. 7.3.6 The inspection of the varnished coil shall be carried out in accordance with the method specified in Article 6.2 of GB2643. 7.3.7 Article 5.1 The inspection of the skeleton shall be carried out in the following manner: a. Check the main dimensions of the skeleton after winding, which shall meet the requirements of the drawing: b. Place the skeleton in a constant temperature test box, raise the temperature to 105℃, keep it for 2 hours, take the test piece out of the box, and check the main dimensions of the skeleton after recovery, which shall meet the requirements of the drawing:
JB/T7103-1993
c. Use a volume resistance tester to measure the volume resistance of the skeleton, which shall meet the requirements of Article 5.1c: d. Place the skeleton in an organic solvent, keep it for 2 hours, take out the test piece, and conduct an appearance inspection as required. The organic solvent may be specified by the enterprise's process documents:
e. Inspect the flame retardancy of the skeleton material according to GB5169.5 7.3.8 The inspection of lead wires and lead pieces shall be carried out in accordance with the requirements of Articles 5.3.1 and 5.3.2, and shall meet the requirements of the drawing. 7.3.9 Inspection of interlayer insulation and inner shielding layer of coils. Generally, the selected test pieces shall be cut and inspected according to the requirements of Articles 5.4 and 5.5. 8 Inspection rules
8.1 The inspection of coils is divided into routine inspection, periodic inspection and final inspection. 8.2 Routine inspection includes:
a. One-by-one inspection: Each coil shall be inspected for the items specified in Articles 4.1 to 4.3, 4.4.1 to 4.4.3 during the production process: b. Random sampling inspection: The coil skeleton, lead wires and lead pieces shall be sampled and inspected for the items specified in Articles 5.1.a and 5.3 during the production process. When the production batch does not exceed 150 pieces, piece-by-piece inspection shall be adopted. When the production batch is greater than 150 pieces, the sampling plan specified in the enterprise standard shall be used for inspection.
8.3 Periodic inspection or finalization inspection shall be adopted in the following cases: a. For coils that are continuously produced or have production interruptions of no more than two years, periodic inspection shall be carried out every four years; b. When the design, manufacturing process or materials are changed, the first batch of coils put into production shall be subject to finalization inspection; c. When production is resumed after a production interruption of more than two years, the first batch of coils put into production shall be subject to finalization inspection; d. For coils of new design put into production, finalization inspection shall be carried out before product certification. 8.4 Periodic inspection or finalization inspection items include the items in Chapter 4 and Chapter 5 of this standard. For coils used in hot and humid environments, the inspection items specified in Chapter 6 shall also be added.
8.5 The sampling method for periodic inspection or final inspection shall be carried out in accordance with the following provisions: a. When the production batch does not exceed 150, the sampling quantity of the coils for periodic inspection is 6 at a time, which shall meet the standard requirements: b. When the production batch exceeds 150, the periodic inspection adopts the GB2829 secondary sampling plan, and the discrimination level 1 and the unqualified quality level are RQL20 for sampling inspection, and the number of judgment groups Ac=0, R=2, Ac2=1, R. 2=2, and the number of samples for the first and second samplings are both 6:
c, the sampling quantity for final inspection is 6 at a time, which shall meet the standard requirements. 9 Storage requirements bzxZ.net
The wound coils should be stored in the workstation equipment, and the relative humidity of the surrounding environment of the storage location shall not exceed 80%, and dust prevention measures shall be taken. Additional remarks:
This standard is proposed and managed by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Ouyang Kun.2 Commonly used varnishes for dipping are shown in Table 6.
JB/T7103—1993
Name of varnish
Amino insulating baking varnish
Epoxy ester insulating baking varnish
Epoxy solvent-free varnish
Epoxy polyester phenolic varnish
Gray epoxy ester insulating varnish
Epoxy solvent-free varnish
A30--1
H30—2
5152—4
H30--3
9101-1
Heat-resistant temperature
6.3 For coils used in hot and humid environments, it is generally required to dip in varnish twice, or dip in varnish once and then paint once. After the coil is dipped in varnish, apply another layer of anti-berry paint on the surface.
Test method
Test environment conditions
If there are no other provisions, the test environment conditions shall meet the following requirements: a. Ambient temperature: 15~35℃:
b. Relative humidity: 45%~75%:
c. Atmospheric pressure: 86106kPa.
7.2 Appearance inspection
a Spot check the size of the skeleton and the size of the wire: b. Carry out in accordance with the requirements of Article 4.1.
7.3 Electrical parameter inspection
7.3.1 Use a bridge to measure the resistance of the coil in Article 4.2. 7.3.2 Use a turns meter to measure the number of turns of the coil in Article 4.3, and use a short-circuit turn tester to measure the short-circuit turns of the coil. In special cases, the inductance measurement method can be used for inspection.
7.3.3 Article 4.4 dielectric strength test shall be carried out in accordance with the requirements of Article 20.4.1 of GB7261. When checking the dielectric strength between the coil and the iron core, the coil can be set on the sample iron core. 7.3.4 Article 4.5 Insulation resistance measurement shall be carried out in accordance with the requirements of Article 20.4.2 of GB7261. When checking the insulation resistance between the coil and the iron core, the coil can be set on the sample iron core, and the test instrument shall be selected according to the following requirements: a. For coils with a rated insulation voltage greater than 250V and not less than 500V, an instrument with a voltage level of 1000V shall be used for measurement: b. For coils with a rated insulation voltage greater than 60V and not more than 250V, an instrument with a voltage level of 500V shall be used for measurement; c. For coils with a rated insulation voltage not more than 60V, an instrument with a voltage level of 250V shall be used for measurement. 7.3.5 The mildew resistance test shall be carried out in accordance with GB2423.16. 7.3.6 The inspection of the varnished coil shall be carried out in accordance with the method specified in Article 6.2 of GB2643. 7.3.7 Article 5.1 The inspection of the skeleton shall be carried out in the following manner: a. Check the main dimensions of the skeleton after winding, which shall meet the requirements of the drawing: b. Place the skeleton in a constant temperature test box, raise the temperature to 105℃, keep it for 2 hours, take the test piece out of the box, and check the main dimensions of the skeleton after recovery, which shall meet the requirements of the drawing:
JB/T7103-1993
c. Use a volume resistance tester to measure the volume resistance of the skeleton, which shall meet the requirements of Article 5.1c: d. Place the skeleton in an organic solvent, keep it for 2 hours, take out the test piece, and conduct an appearance inspection as required. The organic solvent may be specified by the enterprise's process documents:
e. Inspect the flame retardancy of the skeleton material according to GB5169.5 7.3.8 The inspection of lead wires and lead pieces shall be carried out in accordance with the requirements of Articles 5.3.1 and 5.3.2, and shall meet the requirements of the drawing. 7.3.9 Inspection of interlayer insulation and inner shielding layer of coils. Generally, the selected test pieces shall be cut and inspected according to the requirements of Articles 5.4 and 5.5. 8 Inspection rules
8.1 The inspection of coils is divided into routine inspection, periodic inspection and final inspection. 8.2 Routine inspection includes:
a. One-by-one inspection: Each coil shall be inspected for the items specified in Articles 4.1 to 4.3, 4.4.1 to 4.4.3 during the production process: b. Random sampling inspection: The coil skeleton, lead wires and lead pieces shall be sampled and inspected for the items specified in Articles 5.1.a and 5.3 during the production process. When the production batch does not exceed 150 pieces, piece-by-piece inspection shall be adopted. When the production batch is greater than 150 pieces, the sampling plan specified in the enterprise standard shall be used for inspection.
8.3 Periodic inspection or finalization inspection shall be adopted in the following cases: a. For coils that are continuously produced or have production interruptions of no more than two years, periodic inspection shall be carried out every four years; b. When the design, manufacturing process or materials are changed, the first batch of coils put into production shall be subject to finalization inspection; c. When production is resumed after a production interruption of more than two years, the first batch of coils put into production shall be subject to finalization inspection; d. For coils of new design put into production, finalization inspection shall be carried out before product certification. 8.4 Periodic inspection or finalization inspection items include the items in Chapter 4 and Chapter 5 of this standard. For coils used in hot and humid environments, the inspection items specified in Chapter 6 shall also be added.
8.5 The sampling method for periodic inspection or final inspection shall be carried out in accordance with the following provisions: a. When the production batch does not exceed 150, the sampling quantity of the coils for periodic inspection is 6 at a time, which shall meet the standard requirements: b. When the production batch exceeds 150, the periodic inspection adopts the GB2829 secondary sampling plan, and the discrimination level 1 and the unqualified quality level are RQL20 for sampling inspection, and the number of judgment groups Ac=0, R=2, Ac2=1, R. 2=2, and the number of samples for the first and second samplings are both 6:
c, the sampling quantity for final inspection is 6 at a time, which shall meet the standard requirements. 9 Storage requirements
The wound coils should be stored in the workstation equipment, and the relative humidity of the surrounding environment of the storage location shall not exceed 80%, and dust prevention measures shall be taken. Additional remarks:
This standard is proposed and managed by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Ouyang Kun.2 Commonly used varnishes for dipping are shown in Table 6.
JB/T7103—1993
Name of varnish
Amino insulating baking varnish
Epoxy ester insulating baking varnish
Epoxy solvent-free varnish
Epoxy polyester phenolic varnish
Gray epoxy ester insulating varnish
Epoxy solvent-free varnish
A30--1
H30—2
5152—4
H30--3
9101-1
Heat-resistant temperature
6.3 For coils used in hot and humid environments, it is generally required to dip in varnish twice, or dip in varnish once and then paint once. After the coil is dipped in varnish, apply another layer of anti-berry paint on the surface.
Test method
Test environment conditions
If there are no other provisions, the test environment conditions shall meet the following requirements: a. Ambient temperature: 15~35℃:
b. Relative humidity: 45%~75%:
c. Atmospheric pressure: 86106kPa.
7.2 Appearance inspection
a Spot check the size of the skeleton and the size of the wire: b. Carry out in accordance with the requirements of Article 4.1.
7.3 Electrical parameter inspection
7.3.1 Use a bridge to measure the resistance of the coil in Article 4.2. 7.3.2 Use a turns meter to measure the number of turns of the coil in Article 4.3, and use a short-circuit turn tester to measure the short-circuit turns of the coil. In special cases, the inductance measurement method can be used for inspection.
7.3.3 Article 4.4 dielectric strength test shall be carried out in accordance with the requirements of Article 20.4.1 of GB7261. When checking the dielectric strength between the coil and the iron core, the coil can be set on the sample iron core. 7.3.4 Article 4.5 Insulation resistance measurement shall be carried out in accordance with the requirements of Article 20.4.2 of GB7261. When checking the insulation resistance between the coil and the iron core, the coil can be set on the sample iron core, and the test instrument shall be selected according to the following requirements: a. For coils with a rated insulation voltage greater than 250V and not less than 500V, an instrument with a voltage level of 1000V shall be used for measurement: b. For coils with a rated insulation voltage greater than 60V and not more than 250V, an instrument with a voltage level of 500V shall be used for measurement; c. For coils with a rated insulation voltage not more than 60V, an instrument with a voltage level of 250V shall be used for measurement. 7.3.5 The mildew resistance test shall be carried out in accordance with GB2423.16. 7.3.6 The inspection of the varnished coil shall be carried out in accordance with the method specified in Article 6.2 of GB2643. 7.3.7 Article 5.1 The inspection of the skeleton shall be carried out in the following manner: a. Check the main dimensions of the skeleton after winding, which shall meet the requirements of the drawing: b. Place the skeleton in a constant temperature test box, raise the temperature to 105℃, keep it for 2 hours, take the test piece out of the box, and check the main dimensions of the skeleton after recovery, which shall meet the requirements of the drawing:
JB/T7103-1993
c. Use a volume resistance tester to measure the volume resistance of the skeleton, which shall meet the requirements of Article 5.1c: d. Place the skeleton in an organic solvent, keep it for 2 hours, take out the test piece, and conduct an appearance inspection as required. The organic solvent may be specified by the enterprise's process documents:
e. Inspect the flame retardancy of the skeleton material according to GB5169.5 7.3.8 The inspection of lead wires and lead pieces shall be carried out in accordance with the requirements of Articles 5.3.1 and 5.3.2, and shall meet the requirements of the drawing. 7.3.9 Inspection of interlayer insulation and inner shielding layer of coils. Generally, the selected test pieces shall be cut and inspected according to the requirements of Articles 5.4 and 5.5. 8 Inspection rules
8.1 The inspection of coils is divided into routine inspection, periodic inspection and final inspection. 8.2 Routine inspection includes:
a. One-by-one inspection: Each coil shall be inspected for the items specified in Articles 4.1 to 4.3, 4.4.1 to 4.4.3 during the production process: b. Random sampling inspection: The coil skeleton, lead wires and lead pieces shall be sampled and inspected for the items specified in Articles 5.1.a and 5.3 during the production process. When the production batch does not exceed 150 pieces, piece-by-piece inspection shall be adopted. When the production batch is greater than 150 pieces, the sampling plan specified in the enterprise standard shall be used for inspection.
8.3 Periodic inspection or finalization inspection shall be adopted in the following cases: a. For coils that are continuously produced or have production interruptions of no more than two years, periodic inspection shall be carried out every four years; b. When the design, manufacturing process or materials are changed, the first batch of coils put into production shall be subject to finalization inspection; c. When production is resumed after a production interruption of more than two years, the first batch of coils put into production shall be subject to finalization inspection; d. For coils of new design put into production, finalization inspection shall be carried out before product certification. 8.4 Periodic inspection or finalization inspection items include the items in Chapter 4 and Chapter 5 of this standard. For coils used in hot and humid environments, the inspection items specified in Chapter 6 shall also be added.
8.5 The sampling method for periodic inspection or final inspection shall be carried out in accordance with the following provisions: a. When the production batch does not exceed 150, the sampling quantity of the coils for periodic inspection is 6 at a time, which shall meet the standard requirements: b. When the production batch exceeds 150, the periodic inspection adopts the GB2829 secondary sampling plan, and the discrimination level 1 and the unqualified quality level are RQL20 for sampling inspection, and the number of judgment groups Ac=0, R=2, Ac2=1, R. 2=2, and the number of samples for the first and second samplings are both 6:
c, the sampling quantity for final inspection is 6 at a time, which shall meet the standard requirements. 9 Storage requirements
The wound coils should be stored in the workstation equipment, and the relative humidity of the surrounding environment of the storage location shall not exceed 80%, and dust prevention measures shall be taken. Additional remarks:
This standard is proposed and managed by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Ouyang Kun.9 Inspection of interlayer insulation and inner shielding layer of coils. Generally, the selected test pieces shall be cut and inspected according to the requirements of Articles 5.4 and 5.5. 8 Inspection rules
8.1 The inspection of coils is divided into routine inspection, periodic inspection and finalization inspection. 8.2 Routine inspection includes:
a. One-by-one inspection: Each coil shall be inspected for the items specified in Articles 4.1 to 4.3, 4.4.1 to 4.4.3 during the production process: b. Random sampling inspection: The coil skeleton, lead wires and lead pieces shall be sampled and inspected for the items specified in Articles 5.1.a and 5.3 during the production process. When the production batch does not exceed 150 pieces, piece-by-piece inspection shall be adopted. When the production batch is greater than 150 pieces, the sampling plan specified in the enterprise standard shall be used for inspection.
8.3 Periodic inspection or finalization inspection shall be adopted in the following cases: a. For coils that are continuously produced or have production interruptions of no more than two years, periodic inspection shall be carried out every four years; b. When the design, manufacturing process or materials are changed, the first batch of coils put into production shall be subject to finalization inspection; c. When production is resumed after a production interruption of more than two years, the first batch of coils put into production shall be subject to finalization inspection; d. For coils of new design put into production, finalization inspection shall be carried out before product certification. 8.4 Periodic inspection or finalization inspection items include the items in Chapter 4 and Chapter 5 of this standard. For coils used in hot and humid environments, the inspection items specified in Chapter 6 shall also be added.
8.5 The sampling method for periodic inspection or final inspection shall be carried out in accordance with the following provisions: a. When the production batch does not exceed 150, the sampling quantity of the coils for periodic inspection is 6 at a time, which shall meet the standard requirements: b. When the production batch exceeds 150, the periodic inspection adopts the GB2829 secondary sampling plan, and the discrimination level 1 and the unqualified quality level are RQL20 for sampling inspection, and the number of judgment groups Ac=0, R=2, Ac2=1, R. 2=2, and the number of samples for the first and second samplings are both 6:
c, the sampling quantity for final inspection is 6 at a time, which shall meet the standard requirements. 9 Storage requirements
The wound coils should be stored in the workstation equipment, and the relative humidity of the surrounding environment of the storage location shall not exceed 80%, and dust prevention measures shall be taken. Additional remarks:
This standard is proposed and managed by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Ouyang Kun.9 Inspection of interlayer insulation and inner shielding layer of coils. Generally, the selected test pieces shall be cut and inspected according to the requirements of Articles 5.4 and 5.5. 8 Inspection rules
8.1 The inspection of coils is divided into routine inspection, periodic inspection and finalization inspection. 8.2 Routine inspection includes:
a. One-by-one inspection: Each coil shall be inspected for the items specified in Articles 4.1 to 4.3, 4.4.1 to 4.4.3 during the production process: b. Random sampling inspection: The coil skeleton, lead wires and lead pieces shall be sampled and inspected for the items specified in Articles 5.1.a and 5.3 during the production process. When the production batch does not exceed 150 pieces, piece-by-piece inspection shall be adopted. When the production batch is greater than 150 pieces, the sampling plan specified in the enterprise standard shall be used for inspection.
8.3 Periodic inspection or finalization inspection shall be adopted in the following cases: a. For coils that are continuously produced or have production interruptions of no more than two years, periodic inspection shall be carried out every four years; b. When the design, manufacturing process or materials are changed, the first batch of coils put into production shall be subject to finalization inspection; c. When production is resumed after a production interruption of more than two years, the first batch of coils put into production shall be subject to finalization inspection; d. For coils of new design put into production, finalization inspection shall be carried out before product certification. 8.4 Periodic inspection or finalization inspection items include the items in Chapter 4 and Chapter 5 of this standard. For coils used in hot and humid environments, the inspection items specified in Chapter 6 shall also be added.
8.5 The sampling method for periodic inspection or final inspection shall be carried out in accordance with the following provisions: a. When the production batch does not exceed 150, the sampling quantity of the coils for periodic inspection is 6 at a time, which shall meet the standard requirements: b. When the production batch exceeds 150, the periodic inspection adopts the GB2829 secondary sampling plan, and the discrimination level 1 and the unqualified quality level are RQL20 for sampling inspection, and the number of judgment groups Ac=0, R=2, Ac2=1, R. 2=2, and the number of samples for the first and second samplings are both 6:
c, the sampling quantity for final inspection is 6 at a time, which shall meet the standard requirements. 9 Storage requirements
The wound coils should be stored in the workstation equipment, and the relative humidity of the surrounding environment of the storage location shall not exceed 80%, and dust prevention measures shall be taken. Additional remarks:
This standard is proposed and managed by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Ouyang Kun.
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