设计生产交直流电机,熔炼电炉连铸机轧机相关冶金设备

Produce AC and DC motors smelting furnace Billets CCM rolling mill etc..

技术领先的冶金设备

Leading metallurgical equipment

设备用于金属冶炼、金属锻造、金属打磨、矿石开采等服务

Focus on metal smelting, metal forging, metal grinding, ore mining and other services

Shanghai Electrical Machinery Group    transformer    Transformer
WechatIMG91
RSP-52FHXQXHZ22-7TBS0-N
WechatIMG51
ATAJD_M-JG59SN2STHUTXF7
WechatIMG5
WechatIMG61
WechatIMG4
WechatIMG71
WechatIMG10

Transformer

The transformer is used in substation, high voltage power station, for electric arc furnace, for intermediate frequency furnace, for high pressure fan, for steelmaking plant, for rolling mill motor power supply.

Rectifier transformer model
ZSSP-20000kVA/20V±5%-1.0KV×4
Second, the transformer implementation standards
GB1094.1-1996 Power transformers Part 1 General
GB1094.2-1996 Power Transformer Part 2 Temperature rise
GB1094.3-2003 Power transformers Part 3 Insulation level, insulation test and external insulation air gap
GB/T1094.4-2005 Power transformers - Part 4: Guidelines for lightning impulses and operational impulses for power transformers and reactors
GB1094.5-2003 Power transformers Part 5 Ability to withstand short circuits
GB/T6451-2008 oil immersed power transformer technical parameters
GB10237-1988 Power transformers Insulation level and insulation test Air gap of external insulation
GB/T13499-2002 Guidelines for the application of power transformers
GB/6451-2008 Three-phase oil-immersed power transformer technical parameters and requirements
Insulation coordination of GB311 high voltage power transmission and transformation equipment
GB/T6434 high-voltage overhead line and power plant, substation environmental pollution area classification and external insulation selection criteria
GB/T15164 Oil-immersed power transformer load guide
GB763 AC high voltage electrical appliances during long-term work
GB2900 electrician name words
GB5273 Terminals for transformers, high voltage electrical appliances and bushings
GB2536 transformer oil
Sound level measurement of GB7328 transformers and reactors
GB7449 Power transformers and reactors - Guidelines for lightning impulses and operational impulses
GB156 standard voltage
GB191 packaging storage and transportation mark
GB50229 Typical fire protection regulations for power equipment
General technical requirements for GB4109 bushings with AC voltages above 1000V
GB/T16927 high voltage test technology
GB/T5582 high voltage equipment external insulation pollution registration
GB7354 partial discharge measurement
GB50150 electrical installation engineering electrical equipment handover test standard
DL/T596 Electrical Equipment Preventive Test Procedure
DL/T power transformer operating procedures
GB 50150-1991 Electrical equipment installation engineering electrical equipment handover test standard
Third, product application
    This product is used in medium frequency melting equipment.
Fourth, transformer performance parameters
4.1 Performance parameters
4.1.1 rated capacity: 20000kVA
4.1.2 voltage ratio: 20±5%/1.0kV×4
4.1.3 Rated current: 577.4A / 4 × 2886.8A
4.1.4 rated frequency: 50Hz
4.1.5 Wiring group: D/d0yn11d±15%
4.1.6 Impedance voltage: 10.8% (75 ° C)
4.1.7 Total loss = no-load loss + load loss (allowable deviation +10%)
4.1.8 Cooling method: oil immersed strong water cooling
4.1.9 Temperature rise of the transformer:
Winding temperature rise Top oil temperature rise Core body, fuel tank and structural surface
50k 45k 60k
4.1.10 Insulation material

  • Five, the advantages of this product
        The loss of this product is less than the loss of two 12-pulse waves, and the floor space is small. It can be controlled by one switchgear and has less harmonic pollution to the power grid. If this 24 pulse transformer is used, the IF power line inductance can be eliminated.
    Sixth, product description
        6.1 The new energy-saving rectifier transformer adopts a new foreign design idea, instead of using high-voltage phase shift, it uses low-voltage phase shift to achieve 24-pulse rectification. This structure can realize 24-pulse phase-shift rectification and a magnetic circuit for one transformer. Really realize 24 pulse waves on the circuit and greatly reduce the pollution of the power grid. The windings are of a foil structure, and a large number of 5, 7, and 11 harmonic currents are generated due to 6-pulse rectification. The transformer losses are greatly increased. The loss of the foil winding is 32% lower than that of the conventional wire wound winding, which can greatly increase the output power of the transformer. The use of foil structure greatly increases the mechanical strength of the transformer, and at the same time ensures the reliability of the product. The loss reduction is reduced by the voltage drop, and the voltage is stabilized. The output power of the power supply is stable, which shortens the melting time and achieves energy saving. .
        6.2 Low-voltage filter compensation system is adopted to ensure that the power factor is not lower than 0.92, ensuring the total harmonic distortion rate injected into the grid and the harmonic currents of each harmonic voltage and grid contact reach the national standard, which increases the output of the transformer. And the reduction of the installed capacity of the transformer, to achieve safety and reliability and energy saving purposes.