1 Introduction

Due to the heating needs of synthesis towers, alcoholization towers and alkylation towers in the chemical fertilizer industry, Shanghai Senpu Electric Research Institute and its wholly-owned subsidiary Shanghai Sendi Voltage Regulation and Transformer Equipment Co., Ltd. have successfully developed TGSA type high-voltage, double-circle (electrical isolation) ) A new series of oil-immersed self-cooling induction regulators.

This series of voltage regulators is under the leadership of well-known experts in my country's voltage regulator Xu Kaiping and Liu Qi senior engineer, after several years of continuous improvement and optimization design by several engineers such as Zhang Yue, He Zhengyu, Zhang Along, and finally successfully developed the excellent performance, first-class quality, The latest product popular with users.

This series of products is equipped with DVRS type digital voltage regulation control cabinet, which has two voltage regulation modes of jog and automatic. It can also be switched by selector switch, and can also realize local or remote control.

During automatic control, the regulator can realize step-by-step automatic pressure regulation according to the production process requirements, and 10 or more operation stages can be set, and the total operation time of each stage can reach 9999 minutes (about 7 days) or longer.

1 Product use

This product is the best temperature-controlled power source for electric heating of synthesis towers, alcoholization towers and alkylation towers in the fertilizer industry. The voltage regulator is equipped with a digital voltage regulating control cabinet, which can realize automatic control according to the heating requirements of the upper computer measurement and control system. The design of this product is optimized, the technical and economic indicators are advanced, and the performance of the product is far ahead of the same industry in the country. At present, this series of products have been used by Shijiazhuang Jinwantai Chemical Co., Ltd., Jincheng Jinxiang Coal Chemical Co., Ltd., Liuzhou Chemical Co., Ltd., Zhejiang Jinju Chemical Co., Ltd., Yingcheng Xindu Chemical Co., Ltd., Hubei Sanning Chemical Co., Ltd., Hebei Chengxin Chemical Co., Ltd. Co., Ltd., Gansu Fengsheng Environmental Protection Technology Co., Ltd., Shanxi Huaxin Fertilizer Co., Ltd., Shandong Luxi Chemical Group Co., Ltd., Mianzhu Chuanrun Chemical Co., Ltd., Xinjiang Zhongneng Wanyuan Chemical Co., Ltd., Qinghai Innovation Mining Development Co., Ltd., Anhui Debang Chemical Co., Ltd. Jilin Changshan Chemical Co., Ltd. and other units adopted.

2 Product model and specification

3.1 Product model

3.2 Product Specifications

Note:①The xxx data in the product model indicates the rated capacity;

②The voltage regulator designed according to 50Hz can also be used for 60Hz power supply;

③Capacity according to R10 priority number system: 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000kVA;

④The company can also undertake the design and manufacture of products that are not in the capacity and voltage specifications in this table.

1 Product performance

a. Main technical and economic indicators: The two main technical and economic indicators of the voltage regulator—no-load current and total loss are only about two-thirds of the standard value, far superior to the level of the same industry in the country;

b. Output voltage range: the minimum no-load output voltage is not more than 30V, and in the case of rated load, the maximum output voltage is equal to or greater than 650V;

c. Voltage regulation characteristics: the output voltage of the voltage regulator can be adjusted steplessly, smoothly and continuously;

d. Power frequency: 50, 60Hz general;

e. No-load output voltage asymmetry: under the condition that the input voltage is symmetrical and is at the rated value, the asymmetry of the maximum three-phase no-load output voltage is not more than 1%;

f. Waveform distortion rate: when the input voltage of the voltage regulator is the rated value and the waveform distortion rate is not greater than 2%, the no-load output voltage of the voltage regulator (three-phase line voltage) is within the output voltage range of more than 25%, and its waveform The distortion rate is not more than 5%;

g. Temperature rise limit: under rated load, the voltage regulator winding temperature rise <65K, the maximum temperature rise of oil surface <55K;

h. Overload capacity: The overload capacity of the voltage regulator conforms to the provisions of the JB/T8749.2 induction voltage regulator standard;

i. Sound level: the sound level of the voltage regulator is less than 85dB(A);

j. Insulation class: voltage regulator class A, high and low voltage coil class F (155℃)

k. Insulation level: The construction frequency withstand voltage of the high-voltage winding is 18kV 1min for 6KV, and 24kV 1min for 10KV;

The construction frequency withstand voltage outside the low-voltage winding is 3kV for 1min.

2 Structural features

a. Voltage regulation mode: manual, digital electric dual-use. Manually used in general debugging, under normal working conditions, use digital automatic voltage regulation;

b. Voltage regulation time: During electric voltage regulation, the no-load output voltage is adjusted from the minimum value to the maximum value (or vice versa), and the required time is 1.0-1.5min;

c. The product structure is compact, the proportion is appropriate, and the shape is beautiful;

d. The three major structural parts are cast iron to reduce magnetic flux leakage and prevent structural deformation;

e. The stator and rotor of the voltage regulator adopt the best slot matching to improve the smoothness of voltage regulation;

f. The stator iron core adopts the new technology of inclined slot to reduce the tooth harmonic and iron core loss and improve the output voltage waveform;

g. In order to improve the concentricity of the stator and rotor cores, the secondary core processing technology is adopted;

h. The low-voltage winding is wrapped with SBEB double glass fiber, and the high-voltage winding is wrapped with SBEMB-1Z5N self-adhesive double-glass fiber wrapped polyester film wrapped with epoxy paint impregnated copper flat wire;

i. The iron core adopts B50A470 produced by Baosteel Company or DW470-50 0.5mm high magnetic conductivity cold-rolled silicon steel sheet produced by Wuhan Iron and Steel Company;

j. Medium-capacity products use tubular fuel tanks, and large-capacity products use radiator-type fuel tanks;

A pressure regulator with a capacity of k.6KV and above and a capacity greater than 1000KVA is generally equipped with a moisture absorber and a pressure-type temperature indicating controller.

3 other

For the working principle, control circuit, installation, use and maintenance of the product, please refer to the relevant chapters of the "Expert Forum" on this website. Expert Forum" DVRS type digital voltage regulating control cabinet.