Business Products
时间: 2004 - 05 - 09
As a leader in R&D and applications of technologies in the industry of domestic ultra-large capacity HV frequency converters, Zhiguang has constantly increased its R&D efforts and refreshed the capacity limit of domestic frequency converters for recent years. 7,000 kVA - 30,000 kVA ultra-large capacity HV frequency converters independently developed by Zhiguang have become strong competitors of similar foreign products and technologies.   For applications of the ultra-high power HV ...
时间: 2009 - 05 - 09
ZINVERT intelligent HV variable frequency speed control system for synchronous motors is developed by Zhiguang Electric specifically for the control of such motors. Scope of ApplicationSuch system has a wide range of applications in sintering fans, compressors and other similar operating conditions.System PrincipleWith the advanced speed sensor-less vector control technology, ZINVERT intelligent HV variable frequency speed control system for synchronous motors avoids high-impulse currents d...
时间: 2007 - 04 - 09
ZINVERT four-quadrant energy regeneration-type HV variable frequency speed control system is developed by Zhiguang Electric specially for industrial applications requiring variable-frequency four-quadrant operation. Scope of ApplicationSuch system has a wide range of applications in shaft hoisting and other similar operating conditions.  System PrincipleSuch four-quadrant energy regeneration-type HV frequency converter independently developed by Zhiguang Electric includes the adap...
时间: 2010 - 09 - 09
Product Description: ZGMVS series HV solid-state soft starter is designed to start a motor. It consists of three-phase antiparallel thyristors cascaded between the power unit and the controlled motor, and the electronic control circuit. It controls the conduction angle of thyristors to make the voltage on the motor vary with the required starts and stops. Such softness has good interference immunity. The trigger system operates stably and reliably. Those thyristors have perfect dynamic/static vo...
时间: 2011 - 05 - 10
Product Description:The HV and LV permanent magnet motor servo control system consists of the efficient permanent magnet motor and smart servo control system. With a power range from 20 kW - 10,000 kW and voltage grade between 380 V - 10,000 V, such control system integrated with open and closed-loop vector control technologies has a wide range of applications in HV high-power direct-drive mills, multi-drive belt conveyors, vehicle transmission and other field conditions. We have successfully de...
时间: 1999 - 05 - 09
Product Description: Type KD-XH quick arc suppression system for distribution networks consists of a grounding transformer, arc suppression coils, a control cabinet and a central data display. The arc suppression coils are complete with primary and secondary windings, with 100% short-circuit impedance. The primary winding is connected to the neutral point of the distribution network as operating winding, while the secondary winding is connected backwards to two silicon controlled rectifiers (SCR...
时间: 2001 - 05 - 10
With neutral grounding via an arc suppression coil, the transient single-phase earth faults can be accurately identified to quickly enter and exit the offset mode. For non-instantaneous single-phase earth faults, the grounded lines can be accurately determined according to the set time to eliminate failed lines and improve the power supply reliability of the grid.   Technology Overview: Our KD-XHTZ multi-tap arc suppression coil apparatus with automatic follow compensation contain...
时间: 2003 - 05 - 10
With the recent development of distribution systems and further renovation of urban and rural distribution networks, numerous cables have replaced previous overhead transmission lines. To a certain extent, the decrease in the probability of single-phase earth faults reduces the high trip-out rate arising from low-resistance grounding systems. However, the high line selection accuracy of such low-resistance grounding systems are accepted by the majority of users. Consequently, they still have a w...
时间: 2015 - 05 - 24
Product OverviewZGMNGR multi-mode grounding system is fully integrated with arc suppression coil and low resistance grounding systems. It eliminates the weaknesses of such two conventional systems and gives full play to their respective advantages. Thus, it proves to be a novel neutral grounding system for distribution networks. After compensation by arc suppression coils in ZGMNGR multi-mode grounding system, any transient earth fault can be recovered. In case of a permanent earth fault, the co...
时间: 2004 - 05 - 10
Product Description: This controlled resistance grounding system consists of a controlled reactor and low resistance. It gives full play to the benefits of resonance and low resistance grounding technologies. In case of an earth fault on a distribution network, it can achieve perfect comprehensive troubleshooting based on the specific failure.When a transient earth fault occurs on a distribution network, the controller calculates the required inductor current to be compensated according to the m...
时间: 2005 - 02 - 10
Product Description:1. Grounding line selectionSuch detector can achieve the single-phase grounding line selection of the 3 kV - 66 kV isolated neutral system or the neutral grounding system of resistance and arc suppression coils. Its operation mode is free from the system operation mode and ground overcurrent resistance.2. DisplayIt has the data displayed in Chinese, including real-time clock (RTC), detector operation state, system configuration parameters, busbar or line sequence numbers of e...
时间: 2010 - 05 - 10
Product OverviewZG-dSVC HV dynamic SVC is developed by Zhiguang Electric's R&D team with Tsinghua University relying on its technologies and experience in high-power electric and electronic apparatuses, HV reactive power automatic compensation control, and power automation. Such SVC has passed the type test performed by the national authority and has been successfully applied in metallurgical, coal, and wind power generation industries.        Principle & Co...
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