JB/T 6483-1992 Electric refined explosion-proof transformer JB/T6483-1992 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 6483-1992
Electric Refined Explosion-proof Transformer
1992-08-06 Issued
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1993-01-01
Mechanical Industry Standard of the People's Republic of China
Electric Refined Explosion-proof Transformer
Subject Content and Scope of Application
JB/T 64831992
This standard specifies the model, explosion-proof form, specification, performance parameters, technical requirements, test methods and marking, packaging, transportation and storage of electric refined explosion-proof transformers (hereinafter referred to as electric refined transformers). This standard applies to electric refined transformers with rated capacity of 10kVA and below, rated frequency of 50Hz, input voltage of .3kV or 0.22kV, high voltage DC output,
oil immersed self-cooling, outdoor use. 2
Reference standards
Packaging, storage and transportation signs
GB1094.1~1094.5 Power transformers
GB4208
JB4159
Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method General requirements for explosion-proof electrical equipment for explosive environments Explosion-proof electrical equipment for explosive environments Increased safety electrical equipment "e" Explosion-proof electrical equipment for explosive environments Oil-filled electrical equipment "α\Classification of enclosure protection levels
General technical requirements for tropical electrical products.
Electric refined explosion-proof transformer model
Electric refined explosion-proof transformer model is specified as follows: JB
High-voltage side DC output voltage, kv
Rated capacity, kVA
Built-in reactor, rectifier
Electric refined explosion-proof transformer
Electric refined transformer product models are as follows: single-phase, oil-immersed, self-cooling, no-excitation voltage regulation, copper conductor, 10kVA, transformer with built-in reactor, rectifier, high-voltage DC output 30kV electric refined transformer model. JBDKZ-10-30
Product explosion-proof mark
Approved by the Ministry of Machinery and Electronics Industry on August 6, 1992 and implemented on January 1, 1993
Performance parameters
Product specifications,
Product specifications Performance parameters should comply with the provisions of Table 1 Rated capacity
Voltage combination
Output (DC)
JB/T6483-1 992
Temperature group
Electrical equipment category
Explosion-proof type (increased safety type)
Oil-filled type
Connection group number
Note: ①The performance indicators all refer to the built-in reactor: 1
No-load loss
Load loss
②Load loss is the loss when the high-voltage side is at the lowest voltage under rated capacity. The allowable deviation of the performance data of the electric refined transformer shall comply with the provisions of Table 2 5.2
1. No-load loss
2. Load loss
3. Total loss
4. No-load voltage ratio on each tap (main tap) 5. Impedance voltage under rated current
6. No-load current
No-load current
Allowed The performance parameters of the rectifier inside the bias
electric refined transformer shall meet the corresponding standards and the requirements of Table 3: Table 3
Rated current
Working voltage
Reverse voltage
Impedance voltage
Technical requirements
JB/T6483-1992
Altitude, ambient temperature and power supply conditions under normal use conditions shall comply with the provisions of a, b, d and e in Article 2.1 of GB1094.1. 6.1
Note: If the product is used under special conditions, the user shall negotiate with the manufacturer. 6.2
Electric refined transformers are suitable for Zone II locations where explosive gas environments are not expected to occur during normal operation, and even if they occur, they should occur as infrequently and for a short time as possible.
6.3Electric refined transformers should operate continuously for a long time under short-circuit conditions. 6.4 The reactor, transformer and rectifier in the electric refining transformer should be placed in the same box. 6.5 The main body of the electric refining transformer is an oil-filled structure, and an oil storage cabinet may not be provided. However, there should be enough space between the oil level and the oil tank cover so that the oil will not overflow at the highest oil temperature.
6.6 The input side terminals and the DC high-voltage part measurement terminals should be led to the increased safety type junction box with bushings. The wiring terminals should be connected to the external wires in the junction box. The high-voltage junction box is oil-filled. 6.7 Both the oil tank and the high-voltage junction box should have oil level gauges. When the oil level gauge is damaged and causes oil outflow or leakage, the conductive parts should be immersed in the oil to a depth of not less than 25mm. The oil level on the oil tank should be marked with three oil level indicator lines equivalent to oil temperatures of +40℃C, +20℃-30℃ when the electric refining transformer is not put into operation, and there should be an oil drain valve. 6.8 A corrosion-resistant, firm and reliable grounding device should be welded on the lower part of the high-voltage DC junction box on the oil tank. 6.9 The silicon rectifier adopts single-phase bridge connection. 6.16 The silicon rectifier is connected to the transformer in the oil tank and can be taken out and put in separately from the oil tank. 6.11
The main components of the electric refined transformer are:
bimetallic thermometer;
dehumidifier;
pressure release valve.
Fasteners, nameplates and explosion-proof signs exposed to the air should have slight corrosion resistance. The oil tank should withstand the strength test of 50kPa water pressure, and the test time is 1min. There should be no damage and permanent deformation. 6.14
The protection level of the low-voltage pull box meets the IP54 requirements. The electric refined transformer should be able to withstand the 50kpa air pressure sealing test, which should last for 24 hours without leakage and ring damage, and the residual pressure should be no less than 30kpa. 6.15
6.16 Insulation level
6.16.1 Rated short-time power frequency withstand voltage See Table 4 Table
Transformer input
Transformer output
Transformer end
Reactor
Rectifier to ground
Insulation level
Rated short-time power frequency withstand voltage (kV)
Reverse phase 80
JB/T6483—1992
Note: The power frequency withstand voltage at the output end of the transformer can be achieved by inductive withstand voltage test. 6.16.2 The output end of the transformer can withstand the inductive withstand voltage test of 200% of the maximum output voltage. 7
Inspection rules, inspection items and methods
Inspection rules
The inspection of electric refined transformers is divided into factory test and type test. When the product leaves the factory, it shall be tested for each unit and accompanied by a factory certificate. In any of the following cases, the product shall be subject to type test: new trial-produced products; after formal production, if there are major changes in structure, process, and materials that may affect product performance; the product shall be subject to regular type test every five years. 7.2 Inspection items and inspection methods The inspection items, explosion-proof performance inspection and methods of electric precision transformers are shown in Table 5. Table 5
Sealing test
Winding resistance determination
Voltage ratio measurement and calibration of voltage loss relationshipNo-load loss and no-load current measurement
Load loss and impedance voltage measurement
Insulation resistance measurement
External voltage withstand test
Induction voltage withstand test
Transformer oil
Oil tank strength test
Temperature rise test
Connector (guide rod matched with insulating bushing) torsion test
Low-voltage junction box enclosure protection grade test
Inspection category
According to product drawings and process requirementsVisual inspection
According to Article 6.15 of this standard
According to Article 8.2 of GB1094.1
According to Article 8. 3 (excluding reactors)According to Article 8.5 of GB1094.1
According to Article 8.4 of GB1094.1
According to Article 3.4 of GB6451.2
According to Chapter 10 of GB1094.3
According to Chapter 11 of GB1094.3 (excluding reactors)According to ZBK41001 "Technical requirements for testing used transformer oil"According to Article 6.13 of this standard
According to GB1094.2 (minimum voltage tapping)
According to Chapter 23 of GB3836.1
According to GB4208
Wet heat test
Aging test for rubber materials
Packaging, transportation and storage
Marking,
8.1 Marking
JB/T 64831992
Inspection category
Inspection method
Assessment of parts and components, according to GB2423.4 Test Db, assessment for 12 cycles, typewww.bzxz.net
conformity assessment after test according to the third level of Articles 2.4.1 and 2.4.2 of JB4159
according to Chapter 29 of GB3836.1
8.1:1 A permanent embossed mark "Ex" should be set in a conspicuous place on the oil tank of the electric refining transformer and painted red. 8.1.2 There should be a nameplate in a conspicuous place. In addition to complying with the relevant provisions of GB1094.1, the nameplate should also have the following on the upper right: a.
"Ex" mark;
Explosion-proof mark "0eIIT5\;
Explosion-proof certificate number.
8.2.1 Electric refined transformers are packed in packaging boxes when leaving the factory. The packaging boxes should have product logos and storage and transportation instructions. 8.2.1.1 Product logos include:
Product name, model, specification1
Maximum product dimensions (length × width × height); b.
Net weight and gross weight, kg.
8.2.1.2 Packaging, storage and transportation instructions The relevant provisions of GB191 shall apply. 8.2.2 The packaging of electric refined transformers shall prevent them from being damaged during transportation and storage. 8.3 Transportation
Electric refined transformers should not be subjected to severe perturbations, bumps and impacts during transportation. 8.4 Purchase and storage
Electric refined transformers are suitable for storage in an environment with good air circulation, no moisture and no exposure to the sun. Additional notes:
This standard was proposed and coordinated by the Shenyang Transformer Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Shenyang Fourth Transformer Plant and Shenyang Transformer Research Institute.
Mechanical Industry Standard of the People's Republic of China
Electric Refined Explosion-proof Transformer
JB/T 64831992
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Postal Code: 100044)
Word count XXX,XXX
Format 880×1230
Print Sheet X/X
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of copies 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standards Service Network: http://www.JB.ac.cn6689
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