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Isolation transformer (double-shielded anti-interference power isolator)

The company has strong technical force, advanced production equipment, high product technology, complete testing equipment, strict enterprise management, and reliable product quality. ; 绕组采用脱胎整列绕制方法 ; 变压器进行真空浸漆,使变压器的绝缘等级达到 F 级或 H 级。 The research, design and production of isolation transformers have many years of history. The company introduces advanced foreign winding equipment and a complete set of vacuum pressure dipping equipment ; the winding adopts the entire winding method ; the transformer is vacuum dipping to make the transformer's insulation. Level reached F or H. Product performance has reached the international advanced level. 50Hz 400Hz ,电压 1000V 以下的电路中,广泛用于照明、机床电器、机械电子设备、医疗设备、整流装置等。 Isolation transformers are suitable for circuits with AC 50Hz to 400Hz and voltages below 1000V , and are widely used in lighting, machine tools, electrical and mechanical equipment, medical equipment, rectifiers, etc. Product performance can meet various special requirements of users.

800KVA The output and input voltage of the isolation transformer are designed as required. There are single-phase, three-phase or multi-channel input and output. There are specifications such as delta and star, and the rated power is up to 800KVA . At present, our company's isolation transformers and self-propagating transformers are widely used in various fields of industrial production. Among them, the isolation transformer products are suitable for various occasions where the mains voltage needs to be transformed or safely isolated. , CNC machining centers, printing machinery and low-voltage high-current systems.

1. /Yo Yo/ △接法) With voltage conversion function (such as: △ / Yo or Yo / △ connection method)

2. Filter anti-interference function (such as: can remove the third harmonic interference function. Can remove the odd harmonic interference . )

3. Can effectively suppress the harassing harmonics and lightning electromagnetic pulses introduced from the power line to interfere with the system

4. 装置和系统)产生干扰 Can effectively suppress the disturbance harmonics emitted by the electronic equipment of this system into the power distribution network and cause interference to other equipment ( devices and systems )

5. Can fundamentally prevent system malfunction, data loss or errors caused by ground potential disturbance

6. It can effectively prevent the hardware equipment in the system from being destroyed by counterattack when the lightning protection potential of the building is raised sharply when the lightning protection device of the building is flashed.

7. 1的变压器。 The biggest reason why the isolation transformer is widely used in construction is that the isolation transformer is a 1 : 1 transformer. ,次级也是220v220v for primary and 220v for secondary. The AC power we use is connected to the earth with a wire. 的电位差。 There is a potential difference of 220V between the other line and the ground. Contact with people can cause electric shock. The secondary of the isolation transformer is not connected to the ground, and there is no potential difference between any two of its wires and the ground. It is safer for people to touch any wire without getting an electric shock. Isolation transformers are commonly used on electronic instruments with high voltage tubes, such as tube amplifiers, oscilloscopes, etc., and can also be used to repair power supplies.

8. The characteristics of the isolation transformer at the input of AC power :

   :若电网三次谐波和干扰信号比较严重,采用隔离变压器,可以去掉三次谐波和减少干扰信号。 a : If the third harmonic of the power grid and the interference signal are serious, the isolation transformer can be used to remove the third harmonic and reduce the interference signal.

   采用隔离变压器可以产生新的中性线,避免由于电网中性线不良造成设备运行不正常。 b: The use of an isolation transformer can generate a new neutral line to prevent the equipment from operating abnormally due to a bad neutral line in the power grid.

   非线性负载引起的电流波形畸变(如三次谐波)可被隔离而不污染电网。 c: The current waveform distortion (such as the third harmonic) caused by the non-linear load can be isolated without polluting the power grid.

9. The characteristics of the isolation transformer at the AC power output:

   :防止非线性负载的电流畸变影响到交流电源的正常工作及对电网产生污染,起到净化电网的作用。 a : Prevent the current distortion of non-linear load from affecting the normal operation of the AC power supply and causing pollution to the power grid, and play a role in purifying the power grid.

   在隔离变压器输入端采样,使得非线性负载电流的畸变不影响取样的准确性,得到能反应实际情况的控制信号。 b: Sampling at the input of the isolation transformer , so that the distortion of the non-linear load current does not affect the accuracy of the sampling, and a control signal that reflects the actual situation is obtained.

   若负载不平衡,也不影响稳压电源的正常工作。 c: If the load is unbalanced, it will not affect the normal operation of the regulated power supply.

10. Principle, structure and advantages of three-phase isolation transformer

The isolation transformer adopts a three-phase double-winding structure, and has the characteristics of anti-lightning and anti-interference. Each winding on the primary and secondary sides is divided into two coils, and the two coils are wound with two layers of metal foil insulated from each other. (所谓容性隔离变压器)。 There is then a capacitance C between the two coils (so-called capacitive isolation transformer). Then you can take any combination of the following two wiring methods as required :

:接在三相四线制系统一侧的绕组宜接成Z形接法。 : The windings connected to one side of the three-phase four-wire system should be connected in a Z -shape connection method.

   : 接在三相三线制系统一侧的绕组宜接成六角形接法。 : The windings connected to one side of the three-phase three-wire system should be connected in a hexagonal connection method.

: The winding structure of these two wiring methods has the following advantages :

1. The transformer winding itself has a large parallel capacitor capacity, which can compensate the grid reactive power.

2. 形接线绕组时,每一绕组的两个线圈中的电流方向是相反的。 When zero-sequence fundamental currents or zero-sequence harmonic currents of the same phase flow through the hexagonal or Z -shaped windings, the current directions in the two coils of each winding are opposite. 同时,每相绕组两个线圈的相位差为60度,三倍频率时的相位差则为180Therefore, the resultant magnetic flux generated by the current in the iron core is zero, and no zero-sequence potential or zero-sequence circulating current will be induced in the other winding . At the same time, the phase difference between the two coils of each phase winding is 60 degrees. The phase difference at double the frequency is 180 degrees   , Cancel each other in the opposite direction, which can effectively eliminate the third harmonic potential. Thus, the main disturbance harmonic components in the power grid are suppressed.

3. 级联滤波电路。 In this two-layer concentric winding structure, each box coil has an inductance and a phase-to-phase parallel capacitor, forming a large-capacity distributed self-coupling LC cascade filter circuit. Because the coil diameter of each box is slightly different, the capacitance value is also different.   Therefore, a cascaded broadband resonance circuit with different resonance frequencies is formed. 和电容C的参数比值,就可以既获得理想的抑制各次谐波的效果,又不会发生谐振及通常电容器所可能出现的过电压、过电流现象。 As long as the parameter ratios of the inductance L and the capacitance C of the windings on each side are properly designed and prepared, the ideal effect of suppressing each harmonic can be obtained without resonance and overvoltage and overcurrent that may occur in capacitors. phenomenon.

4. It can completely isolate the lightning electromagnetic pulses of the same phase in the three-phase power line.

5. Because the zero-sequence magnetic flux and zero-sequence reactance are zero, the zero-sequence additional loss of the transformer is eliminated, and the energy saving effect is obvious. It also improves the sensitivity of the transformer's secondary single-phase short-circuit protection.

以下的单相和三相隔离变压器,如单相AC220110V ,三相380200V220V460V等各种进口设备专用隔离变压器,可以定制各种UPS电源输入的隔离变压器(可以很好的解决零地电压问题) Remarks: Various single-phase and three-phase isolation transformers below 500V can be customized, such as single-phase AC220 to 110V , three-phase 380 to 200V , 220V , 460V and other imported equipment. Isolation transformer (can well solve the problem of zero ground voltage)

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