JB/T 5777.3-2002 Basic test methods for control and relay protection panels (cabinets and stations) used in secondary circuits of power systems
Some standard content:
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JB/T5777.31991
2002-12-01
JB/T5777.3—2002
This standard It is a revision of JB/T5777.3--1991 "Basic test methods for control and relay protection panels (cabinets, tables) for secondary circuits in power systems" (hereinafter referred to as the original standard).
This standard is consistent with JB The main changes compared to /T5777.3-1991 are as follows: the reference standard is changed to the latest version
Remove 7.2.1~7.2.6 in the original standard and change it to: a) 7.2.1 Basic action performance. And time characteristic test: special performance test:
b))7.2.2
c) 7.2.3
Special relay test.
—Added:
a) 7.3
Test of devices for screens, cabinets and tables:
b) 7.6.3.13 Overvoltage protection:
c) 7.6.3.14 Low voltage protection:
d) 7.6.3.15 Distance protection.
e) Chapter 14 of the electromagnetic compatibility test (for static products) standard has been modified.
This standard replaces JB/T5777.3--1991. This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Measuring Relays and Protection Equipment. This standard was drafted by: National Relay Quality Supervision and Inspection Center. Drafter of this standard: Li Quanxi.
This standard was first published in 1991.
1 Scope
Basic test methods for control and relay protection screens (cabinets, tables) for secondary circuits in power systems
This standard specifies the control and relay protection screens (cabinets, Taiwan) test items, procedures and methods. JB/T5777.3—2002
This standard applies to control panels (cabinets) and protection panels (cabinets) used in secondary circuits of power systems (only including transmission line protection with voltage levels of 35kV and below and 25MW and below) Basic test methods and test procedures for complete sets of electrical equipment such as water and thermal power plant power maintenance control consoles and DC panels (cabinets) [hereinafter referred to as panels (cabinets, panels)]. The test procedures and methods for transmission line protective screens and main equipment protective screens with voltage levels of 110kV and above are stipulated in other standards. This standard does not apply to low-voltage switchgear complete sets. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard. GB/T1958-1980 Shape and position tolerance testing regulations GB/T4728.1--1985 General principles for graphical symbols for electrical diagrams (neqEC60617-1: 1985) GB/T4728.2-~13 Graphical symbols for electrical simplified diagrams GB/T7261- -2000 Basic test methods for relays and devices JB/T3962-2002. Comprehensive reclosing device technical conditions 3 Test conditions and test instrumentation requirements 3.1 Test conditions
3.1.1 Environmental conditions:
Except otherwise Unless otherwise specified, tests shall be conducted under normal atmospheric conditions. Normal test atmospheric conditions are:
Ambient temperature: 15℃～35℃.
Relative humidity: 45%~75%.
Atmospheric pressure: 86kPa106kPa.
3.1.2 Test power supply performance:
AC power frequency: 50Hz±1Hz.
AC power waveform: sine wave, waveform distortion factor not greater than 5% (or 2%). DC component in AC power supply: deviation is 2% of the peak value. AC component (ripple) in DC power supply: no more than 6%. The unbalance of the AC power system should not be greater than 5% (or 1%). The currents of each phase are equal, and the deviation is not greater than 1% of the average value of each current. The angle between the voltage of each phase and the current of the phase should be equal in size, and the deviation should not be greater than 2°. 3.1.3 When a dispute occurs, arbitration can be conducted under the benchmark conditions specified in 4.1.2 and 4.2 of GB/T7261-2000. JB/T5777.3—2002
3.2 Test instruments and meters
Unless otherwise specified, the accuracy of the instruments and meters used in the test should meet the following requirements. 3.2.1 The accuracy of generally used instruments should be selected according to Table 1 according to the error level of the measurement. Table 1 Instrument accuracy level
Error
Instrument accuracy
Digital instrument accuracy
<0.5%
0.1 levelbzxZ.net
6 and a half digits| |tt||3.2.2 The instrument used to measure the phase shall not be lower than level 1.0. 3.2.3 The error of the instrument used to measure temperature is ±1°C. ≥0.5%~1.5%
Level 0.2
5 and a half digits
>1.5%~5%
Level 0.5
4 and a half digits||tt ||5%
Level 1.0
4 and a half digits
3.2.4 Instrument for measuring time: when the measuring time is greater than 1s, the relative error is not greater than 5/1000: the measuring time is less than Or equal to 1s, the relative error is not greater than 1/1000.
3.2.5 The accuracy of other test instruments should meet the requirements of corresponding standards and comply with the requirements of relevant metrology certification 4. Test content
Appearance and structural inspection.
4.1
4.2 Mechanical inspection.
4.3 Electrical performance inspection.
4.4 Insulation performance inspection.
4.5 power consumption test.
4.6 Thermal performance test.
4.7 Influence quantity and influencing factors extreme range test. 4.8 Test on the impact of temperature changes on performance
4.9 Test on the impact of power supply.
4.10 Electromagnetic compatibility test.
5 Appearance and Structural Inspection
5.1 Screen (cabinet, table) frame dimensions inspection
5.1.1 Screen (cabinet, table) frame appearance dimensions, verticality, flatness , hole positioning should be carried out when no components are installed. 5.1.2 Dimensional measurement: use steel ruler and steel tape measure. If necessary, a grating (or magnetic grating) digital display displacement measurement system can be used for arbitration.
When measuring, you should first select enough reference points and measure each outer dimension one by one. For example, when measuring the outer dimensions of a screen frame, you can first select the four endpoints of two diagonal lines in different directions on any two corresponding planes of the screen frame as the benchmark, as shown in Figure 1 (Figure 1 is based on the selection of two diagonal lines on the upper and lower planes. The 4 endpoints of the diagonal are used as the reference) to measure 12 external dimensions in the X, Y, and Z directions. The dimensional errors of height, width and depth shall not exceed the requirements of enterprise product standards. 5.1.3 Verticality measurement: Measure with steel ruler and steel tape measure. If necessary, a grating (or magnetic grating) digital display displacement measurement system can be used for measurement. During measurement, the diagonal and outer dimensions of the plane formed by the measured elements can be measured, see Figure 2a) When measuring the outer dimensions, AX should meet the value specified by the company's product standards. When measured using the diagonal method, L - L2 = △ Method measurements are used for arbitration. 5.1.4 Flatness measurement: Use the measuring edge of the steel ruler as an ideal straight line, place it vertically on the screen (cabinet, table) panel, and observe and measure the distance from the steel ruler to the screen (cabinet, table) panel to determine Flatness. 2
Picture 1
a)
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JB/T5777.3—2002
When measuring, first observe the maximum and minimum gaps between the surface to be measured, and then use a feeler gauge to measure the gap Use this method to measure at least 3 places on the panel being tested to determine the maximum value of the flatness error (i.e., the difference between the maximum gap and the minimum gap). The maximum value should be lower than the value specified by the company's product standards. 5.1.5. Hole position measurement: Use a caliper to measure. The measurement method is in accordance with the regulations of GB/T1958--1980. The measured opening position error of the panel of the same part and the opening position error of the panel of different parts shall not be greater than the value specified by the enterprise's product standards. 5.1.6 Opening error measurement: Use a caliper to measure the opening accuracy. The opening accuracy should comply with the corresponding components opening requirements. 5.1.7 Measurement of the gap between the door, flap and frame: Use a feeler gauge; for a screen (cabinet, table) frame with a door and flap structure, the size of the gap between the door, flap and frame needs to be measured. When measuring, the gaps at the top, middle and bottom should be measured separately to see if the gaps are evenly hooked and whether they hinder the rotation of the door or flap.
5.1.8 The size of each dimension above should comply with the requirements of enterprise product standards. If there is an out-of-tolerance, when the error is greater than the tolerance and less than twice the tolerance, it will be counted as a general defect; when it is greater than twice the tolerance, it will be counted as a general defect. Major defects meter. 5.2 Screen (cabinet, table) frame quality inspection
5.2.1 Screen (cabinet, table) frame mechanical strength inspection: The screen (cabinet, table) frame should have sufficient mechanical strength. After installing all components on the screen (cabinet, table), check whether the screen (cabinet, table) frame is cracked. 5.2.2 Screen (cabinet, table) panel quality inspection: Check the rigidity of the screen (cabinet, table) frame, whether the screen (cabinet, table) is deformed after the components are installed: whether there is shaking or shaking when operating each component. Can it withstand the impact of electric power? 5.2.3 Inspection of the assembled screen (cabinet, table) frame: 5.2.3.1 Whether the assembled screen (cabinet, table) frame is clean and firm. For the screen (cabinet, table) frame assembled by welding, check the quality of the welds at each welding point to see whether there are welding penetrations, cracks, slag inclusions or pores, etc., and whether the coating and slag spatter have been removed cleanly.
For the screen (cabinet, table) frame assembled with components, check whether the connection part is firm and whether there are any measures to prevent loosening. 5.2.3.2 Whether the assembled screen (cabinet, table) frame feet are stable and whether there is any obvious skew. 5.2.4 Check the quality of the mounting holes of each component: whether the edges of each mounting hole are smooth, whether there are burrs and cracks, and whether they meet the requirements of relevant standards. 5.2.5 Check whether the screen (cabinet, table) frame provides fastening installation facilities (including connecting components fixed to the foundation, components for screen assembly, and transportation and loading and unloading facilities) and safety grounding facilities, and check whether the grounding point is clearly marked. Whether it complies with relevant standards. 5.2.6 Check whether there are threading holes in the lower part of the screen (cabinet, table) frame to facilitate debugging and testing of wiring. 5.3 Inspection of screen (cabinet, table) nameplates, symbols and signs. Screen (cabinet, table) nameplates, symbols and signs are correct, clear, complete, easy to identify, and meet the requirements of product drawings. 5.4 Inspection of the quality of the coating layer
5.4.1 The color of the coating layer should be uniform, and there should be no obvious color difference and glare. 5.4.2 Check the coating layer. There should be no sand, wrinkles, or flow. Defects such as marks, spots, bubbles, fingerprints and adherents JB/T5777.3-2002
5.4.3 The coating layer should be firm and there should be no bottom exposure. When checking the quality of the coating layer, it should be carried out under indoor light with an illumination equivalent to a normal sunny day and good lighting. The examiner's vision is normal, and the examiner should observe at a distance of 0.5m to 1m from the surface being examined. 5.5 Analog line quality inspection
The drawing method of icons in the analog line should comply with the national standards GB/T4728.1-1985, GB/T4728.2～13. Its position and size can be checked according to the relevant technical documents. The color of the analog line should be checked according to the product standards and the factory-defined color plate to see if it matches the voltage level it represents.
5.6 Inspection of component installation
5.6.1 According to the relevant technical documents, check whether the model and specifications of each component are correct: whether the components have product qualification certificates and relevant certifications and marks ,
5.6.2 The components installed on the screen (cabinet, table) panel should be horizontally and vertically, and no obvious skew is allowed. If so, adjustment can be allowed, but it still cannot be done after adjustment. When it reaches the horizontal or vertical position, it should be regarded as a general defect. 5.6.3 Check the fastening quality of component installation. The quantity and type of fasteners should comply with the requirements of relevant technical documents, and the installation of fasteners should comply with relevant requirements.
5.6.4 Check whether the components installed behind the screen (cabinet, table) are suspended. Corresponding to the installation parts equipped with insulating bottom plates, check whether the insulating bottom plates are ready. 5.7 Inspection of the quality of connecting wires and wiring 5.7.1 Check whether the color of the wires and the diameter of the wires used comply with the company's product standards. 5.7.2 Check whether the wiring harness layout complies with the company's product standards. 5.7.3 For products that use cable troughs for wiring, check whether the cable trough is tight and whether the exit of the cable trough is smooth and has no sharp edges. For products that are wired by bundling, check whether the number of wires in the wire harness exceeds the specified limit, whether the wire harness is arranged horizontally and vertically, and whether there is any damage to the insulation layer of the wires at the binding location.
5.7.4 Check whether there is a number plate on the end of each wire, and whether the mark is consistent with the installation wiring diagram. 5.7.5 Check the number of wires connected to the connection end. In principle, only one wire is allowed, and a maximum of two wires are allowed. Also check the reliability and looseness of the contact at the connection end.
5.7.6 Use a multimeter or connection indicator to check whether the wire connection meets the requirements of the product wiring diagram. 5.8 Inspection records
The above appearance and structural inspection results should meet the requirements of the standard. If they do not meet the requirements, All defects should be accumulated one by one according to general defects. 6 Mechanical performance inspection
6.1 For movable parts such as doors and flaps, the mechanical properties should be checked by simulating usage conditions, opening and closing the door or flap five times, checking the opening angle, and the maximum opening Check whether there is any collision with the components during positioning. Is there any card issuance during the opening and closing process? Is the door lock locked and reliable after closing? If a problem occurs once in five tests, please follow the general defect record, 6.2 for buttons installed on the screen (cabinet, table), various switches, etc. Components must be simulated five times. Abnormal phenomena are not allowed. When abnormal phenomena occur, they shall be counted as general defects. 6.3 For plug-in components, they should be easy to plug in and out, and similar components should be interchangeable. After plugging and unplugging five times, if it is found that plugging in and out is inconvenient or difficult, it will be recorded as a general defect.
6.4 For components with setting machinery, manual tuning should be performed five times. The setting method should be flexible and convenient. If abnormal phenomena are found, they should be recorded as general defects. For the movable parts of the components, also Mechanical inspection should be carried out, and there should be no phenomena such as card issuance. 6.5 The manual analog indicator on the panel should be flexible in operation and can reflect various states of the analog line. 6.6 For parts with other mechanical functions, they should be inspected according to their functional requirements. 7 Electrical performance test
7.1 General circuit diagram of electrical performance test
4
The general circuit diagram of electrical performance test is shown in Figure 3. L+C | 7.2.2 Special performance test
shall be carried out in accordance with the enterprise product standards.
7.2.3 Test of special relays
Test
Test
Equipment
Equipment
S——Control switch||tt| |Figure 3
According to the provisions of GB/T7261-2002 and enterprise product standards. 7.3 Testing of devices for screens, cabinets and desks
7.3.1 Testing of action value accuracy (testing any set value within the setting range) shall be in accordance with the provisions of 7.2 in GB/T7261--2000. OUu
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JB/T5777.3—2002
Output voltage
Outward current
signal Input
Auxiliary power supply
7.3.2 Test of action time and delay accuracy (delay accuracy test any setting value within the setting range) according to GB/T7261--2000 No. 8 regulations of the chapter. 7.3.3 The test of the measurement and control unit (test any value within the measurement range) shall be in accordance with the provisions of Chapter 26 of GB/T7261-2000. 7.3.4 The maximum sensitivity angle and action area are tested according to the provisions of 7.2 in GB/T7261--2000. 7.3.5 Other test contents and methods
shall be carried out in accordance with the enterprise product standards.
7.4 Control panel (station, cabinet) Electrical performance test control panel is generally composed of a switch control loop, a signal loop, and a measurement loop. JB/T5777.3—2002
7.4.1
Switch control loop
Connect the test power supply to the corresponding input terminal of the product respectively, and operate the corresponding parallel switches respectively according to the circuit controlled by it. The controlled circuit should be connected or disconnected. , if the control circuit has a corresponding signal loop, the signal loop should send out signals (such as light signals and audio signals). There should be no abnormality after five live operations. 7.4.2 Signal loop
When connecting the test power supply to the corresponding input terminal of the product and simulating the functions reflected by each signal loop (such as automatic reclosing, voltage disconnection, etc.), the signal loop of the function should be correct transmit signal. Simulate the test five times and there should be no incorrect signals. 7.4.3 Measurement loop
Connect the test power supply to the corresponding input terminal of the product, and apply excitation to the measurement loop. The indications of the measuring instrument should meet the design requirements.
7.5 Central signal panel (control panel) test
7.5.1 Electrical performance test
The central signal control panel is the same as the general control panel, consisting of a switch control loop, a signal loop, and a measurement loop The test contents and test methods are the same as those in 7.4.
The central signal screen is mainly composed of central signal loop relays, voltage monitoring relays, signal relays, grounding signal relays and devices. The test content of the relay shall be in accordance with the provisions of the enterprise's product standards, and the test method shall be carried out in accordance with the provisions of 7.2; the test content of the device shall be in accordance with the provisions of the enterprise's product standards, and the test method shall be carried out in accordance with the provisions of 7.3. 7.5.2 Functional test
7.5.2.1 Test without installing pulse (impact) accident signal circuit a) Wiring according to Figure 4:
b) Press test button SB, accident signal buzzer HA Send out a sound signal: c) Press release button SB2: the sound signal disappears: d) Close switch S, (or S2), HA sends out a sound signal, and signal lamp HL sends out a light signal: e) Press SB1, the signal disappears;
f) Simulate the fuse FU to blow, remove the FU, the fuse will monitor the action and send out a light signal with a delay. 7.5.2.2 Test with pulse accident signal circuit or warning signal circuit a) Wiring according to Figure 5:
) Press the release button SB2: the audio signal HA disappears: d) Close the switch S2 (or S3), KAs acts, HA emits an audio signal, and the signal light HL emits a light signal; e) Press SB2, the audio signal and light signal disappear, 7.5 .2.3 Test of warning signal circuit with delayed signal pulse and instantaneous signal pulse a) Wiring according to Figure 6:
b) Close the test button SB, delay signal pulse relay KA, action, time relay KT, action , delay the sound signal: c) Press SB3, the sound signal disappears:
d) Other test steps are the same as a) ~ h) in 7.5.2.2. 7.5.2.4 Other functional tests
shall be carried out according to the product's principle circuit diagram and enterprise product standards. 7.6 Protective screen (cabinet)
7.6.1 Electrical performance test of each relay
The electrical performance test content of each relay shall be in accordance with the provisions of the enterprise product standards, and the test method shall be carried out in accordance with the provisions of 7.2. 7.6.2 Electrical performance test of each installation
6
JB/T5777.3-2002
The electrical performance test content of each device shall be in accordance with the enterprise product standards, and the sub-test method shall be in accordance with 7.4 Provision is made.
FU
HA
KT
亚
KA
KA
HA-
KA,
KA
Accident signal buzzer: KA,
SB2
SB
山
KA
KA| |tt||accident signal buzzer
accident signal release button
accident signal test button
accident signal sound start 1
accident signal sound start 2| |tt||Fusible unit monitoring relay
Fuse blown signal
Distribution device accident signal 1
Distribution device accident signal 2
Distribution device accident signal middle Relay
Accident signal intermediate relay: SB
One accident signal release button:
SB accident signal test button: KAz, KAs—power distribution installation intermediate relay: KT-fuse Monitoring relay (delay with or without relay) HL Figure 4
7.6.3 Functional test of protection and automation screen The test items are determined based on the function of the constituted relay protection screen. Signal lights: SJ, St—switch: FU-
fuse.
When conducting functional tests, the rated voltage should be applied to the DC circuit, each protection should be put into operation as required, and the fixed values ??should be set. 7.6.3.1 Current quick-break and definite time over-current protection
SB2
SB
山
KA
KA
accident signal buzzer
accident signal release button| |tt||Accident signal test button
Cross fault signal audio start 1
Accident signal audio start 2
Fuse part monitoring relay
Fuse blown signal|| tt||Power distribution device accident signal 1
Power distribution device accident signal 2
Power distribution device accident signal intermediate relay
Accident number intermediate relay: SB
一Accident signal release button:
SB accident signal test button: KAz, KAs—power distribution installation intermediate relay: KT—fuse monitoring relay (delay with or without relay) HL Figure 4
7.6.3 Functional test of protection and automation screens The test items are determined based on the functions of the constituted relay protection screens. Signal lights: SJ, St—switch: FU-
fuse.
When conducting functional tests, the rated voltage should be applied to the DC circuit, each protection should be put into operation as required, and the fixed values ??should be set. 7.6.3.1 Current quick-break and definite time over-current protection
SB2
SB
山
KA
KA
accident signal buzzer
accident signal release button| |tt||Accident signal test button
Cross fault signal audio start 1
Accident signal audio start 2
Fuse part monitoring relay
Fuse blown signal|| tt||Power distribution device accident signal 1
Power distribution device accident signal 2
Power distribution device accident signal intermediate relay
Accident number intermediate relay: SB
一Accident signal release button:
SB accident signal test button: KAz, KAs—power distribution installation intermediate relay: KT—fuse monitoring relay (delay with or without relay) HL Figure 4
7.6.3 Functional test of protection and automation screens The test items are determined based on the functions of the constituted relay protection screens. Signal lights: SJ, St—switch: FU-
fuse.
When conducting functional tests, the rated voltage should be applied to the DC circuit, each protection should be put into operation as required, and the fixed values ??should be set. 7.6.3.1 Current quick-break and definite time over-current protection
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