This standard specifies the product model, performance parameters, technical requirements, test items, inspection rules, marking, packaging, transportation and storage of salt bath furnace transformers. JB/T 3018-1999 Salt bath furnace transformer JB/T3018-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3018
1999-08-06
Wa Xian Ji Dong
2000-01-01
JB/T30181999
This standard is a revision of JB 3018-81 Salt Bath Furnace Transformer. Compared with the original standard, the main revisions are as follows: 1. The format of the standard is in accordance with GB/T1.1-1993. 2. The structure and content of the standard are in accordance with GB/T1.3-1997. 3. Add a "reference standard" item in the standard, and confirm the referenced standards according to the current standards. 4. The connection dimension number is changed according to GB1094.1 standard. Since the salt bath furnace transformer no longer uses hot rolled silicon steel sheets, the parameters of group I are cancelled in the performance data table. 5
6 The reduction method of product model is in accordance with the standard of JB3837, and this standard will not be explained in detail. This standard replaces JB3018-81 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Transformer Standardization. The drafting units of this standard are: Shenyang Transformer Research Institute and Harbin Transformer Factory. The main drafter of this standard is Lin Ran.
This standard was first issued in 1981 and revised for the first time in 1998. Shenyang Transformer Research Institute is entrusted to interpret this standard. I
1 Scopewww.bzxz.net
JB/T3018-1999
JB3018
This standard specifies the product model, performance parameters, technical requirements, test items, inspection specifications, marking, packaging, transportation and storage of salt bath furnace transformers.
This standard applies to single-phase or three-phase salt bath furnace transformers (hereinafter referred to as transformers) with rated voltage of 380V, rated capacity of 200kVA and below, rated frequency of 50 Hz. This standard can be partially quoted for low-voltage and high-current transformers with working voltage below 500V and similar salt bath furnace transformers. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and all parties using this standard should explore the possibility of using the latest versions of the following standards. GB 191—199
Packaging, storage and transportation pictorial marking
GB 311.1—1997
Insulation coordination of high-voltage power transmission and transformation equipment (neIFC60071—1:1993)GB 1091.1—-J996 Power transformers Part 1 General (egJFC 60076—1:1993)GB1094.2—-1996 Power transformers Part 2: Temperature rise (egVIFC60076—2:1993)JB/T 501—1991
JB 8371591
Test Guide for Power Transformers
Tropical Power Transformers, Mutual Magnetic Devices, Voltage Regulators, ReactorsJB/T3837-1996 Method for Compiling Models of Transformer ProductsJB/T8637-1997 Photo-excited Tap Changers3 Product Models
The compilation of product models of salt bath furnace transformers shall comply with the provisions of JB/T3837. 4 Technical Requirements
4.1 Transformers shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.2 Transformers are all indoor installations.
4.3 The operating conditions of transformers shall comply with the provisions of GB1094.1. 4.4 In addition to complying with the provisions of this standard, tropical transformers shall also comply with the provisions of B8314.5 The rated capacity, voltage combination, connection group number and performance parameters of the transformer shall comply with the provisions of Table 1. Wa extremely slow 1999-08-06 tumor
2000-01-01 small
rated capacity
primary voltage
tertiary voltage
10~-35
JB/T30181999
group label
Yyo—Dyl
Yyt-Dyl
empty-cut cabinet
load-cut loss
The allowable deviation of the transformer's simulated power consumption, no-load current and transformation ratio shall not exceed the provisions of Table 2. Table 2
Allowable bias
No-load loss
Hot loss
No-load current
Short-circuit impedance
No-load current
Rated level ±1% Other levels 2%
4. The transformer primary circuit is equipped with an excitation tap-changer for regulating the secondary voltage. The tap-changer is equipped with a reliable interlocking positioning device to ensure operation under the de-excitation state. The de-excitation tap-changer shall comply with the provisions of JB/T 8637. 4.8
The transformer is used for voltage regulation above 5 levels.
The temperature rise of each part of the transformer under the conditions of use specified in this standard shall not exceed the overflow limit value in Table 3. 4.9
Transformer parts
Insulated conductor coil
Bare conductor coil
Core surface and structural component surface
Class A insulation
Temperature rise limit
Class E insulation
Class B insulation
Class F insulation
The maximum temperature rise of the contact insulation material shall not exceed that of the Class H insulation
Temperature rise method
Resistance method
Thermometer method| |tt||Thermometer
4.10When the sea level of the installation site exceeds 1000m (not exceeding 4000m), the influence of the lower heat dissipation efficiency caused by the increase in sea level is compensated by the lower ambient temperature, so the temperature rise limit of each transformer may not be corrected: Note
1When the altitude of the test site exceeds 1000m at the factory, the correction of the temperature rise limit of the transformer shall comply with the provisions of G11094.2. 2When the sea level of the installation site does not exceed 1000 n1, the temperature rise limit of all parts of the transformer in Table 3 shall not be corrected. The transformer shall have overload taps that meet the working needs of the salt bath furnace, and the overload time of each overload tap shall not exceed 1.5H within 8h. 4.11
The other taps of the transformer except the overload tap shall not be operated in a state exceeding the capacity specified on the nameplate. 4.12
4.13The transformer coil connection diagram, phasor diagram and connection group number shall comply with the provisions of Table 1. 2
Coil connection diagram
JB/T30181999
1The coil connection diagram is based on the primary side view. 2Transformers with other connection group numbers can be manufactured according to user requirements. The electrical insulation strength of the transformer shall comply with the provisions of GB311.1. 4.14
Vector diagram
The transformer and the terminals under the power supply voltage shall be equipped with a protective box and a protective cover. The transformer shall be equipped with a base, and there shall be a positioning hole for installation on the base. The iron core of the secondary
transformer shall be reliably grounded through the box: there shall be an obvious grounding symbol or mark at the grounding point. All parts of the transformer that can bear the weight of the transformer shall be installed, and the metal parts of the transformer shall have a reliable protective layer. The structure of the transformer shall ensure that the relative positions remain unchanged after being transported by the positive belt, and the surrounding parts will not loosen. Test items and inspection rules
s.1 Test items
Transformer tests are divided into routine tests, type tests and special tests. 5.1.1 Routine test items include:
a) Appearance inspection;
b) Transformation ratio test (all tap positions);
d) Winding connection group measurement;
e) Winding DC resistance measurement;
f) External pressure test;
g) Inductive withstand voltage test
h) No-load loss test;
i) Load loss test;
j) Switch interlocking device inspection test.
5.1.2 In addition to all routine test items, type test items also include: Connection group number
ryo—yl.
Temperature rise test.
5. 1. 3 Special test items include:
Tropical artificial climate test (according to JB 831 standard). JB/T3018
5.2 The manufacturer shall conduct all routine tests and type tests on new products before mass production. When changing the structure or raw materials: a new type test shall be conducted. Regular type tests shall be conducted at least once every five years, and the test samples shall be selected from the production batch, with a quantity of not less than 2 units. 5.3 The appearance inspection of the transformer and the inspection test of the switch and connecting device shall comply with the provisions of the corresponding technical conditions. 5.4 The test method of the transformer shall comply with the provisions of JB/T501. 6 Product marking, packaging, transportation and storage
6.1 Each transformer must be firmly equipped with a nameplate made of durable, corrosion-resistant materials in a conspicuous position, and the following information must be clearly noted: a) Product name; b) Product model: c) Manufacturer's name: d) Standard denominator; e) Serial number; f) Number of phases; g) Rated frequency (Hz): h) Cooling method (ONAN): i) Use of components (indoor use) i) Rated capacity (KVA); k) Connection group number:
1) Primary rated voltage (V); primary tapping current (A); m) Tapping capacity (kVA); secondary tapping voltage (V) and secondary tapping current (A); n) Use time (continuous use before capacity adjustment, 1.5h for over-cut tapping); d) Short-circuit impedance (short-circuit impedance percentage of rated tapping, all converted to reference temperature, A, E, B grades should be converted to 75℃, F, H grades should be converted to 115℃);
p) Insulation material grade (A grade is not marked); q) Gross weight (kg);
) Year and month of manufacture.
6.2 The packaging of the transformer should be suitable for the requirements of land and water transportation and loading. 6.3 The packaging of the transformer should ensure that it meets the requirements of anti-traffic, rainproof and dustproof during transportation and storage. 6.4 The packaging mark and packaging of the transformer should comply with the provisions of GB191 and corresponding technical conditions. 6.5 Each transformer shall be accompanied by a complete set of (including tap changer) installation and operation instructions, product certificate, test record, product dimension drawing, nameplate or nameplate logo and other technical documents. The factory data shall be properly packaged to prevent moisture. 4
JB/T3018
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