BY89H/450-40+250-15 Intelligent low voltage Integrated 3 phases capacitor 450V

Model and Meaning

The Parameters of Capacitor

Product Introduction

The energy-capable reactive power compensation capacitor is a new generation of reactive power compensation device specially designed for 0.4 kV low-voltage power grids. Through highly integrated design, it integrates a CPU measurement and control unit, a non-inrush current switching device, multiple protection devices, and two (Δ-type) or one (Y-type) low-voltage self-healing power capacitors into an independent and complete intelligent compensation unit. This integrated design not only simplifies the complex structure of traditional reactive power compensation devices but also completely replaces the automatic reactive power compensation system assembled from various dispersed components such as intelligent reactive power controllers, fuses (or miniature circuit breakers), thyristor composite switches (or contactors), thermal relays, and indicator lights.

Eleven Outstanding Performances of BY89H/450Series Smart Capacitors

1. Over-zero Switching: It employs an intelligent circuit that achieves equal-voltage input and zero-current disconnection. In particular, there is no inrush current impact nor operating overvoltage, and no arc reignition occurs during switching. This greatly enhances the equipment's tolerance against voltage and current shocks, with very low power consumption, thus reducing the energy consumption of conventional capacitor cabinets by about 80%.
 
2. Phase-wise Compensation: It realizes single-phase separate compensation to tackle cases of three-phase load imbalances. It compensates the most reactive phase, thus achieving the best compensation effect.

3. Energy Savings and Consumption Reduction: Volume is reduced automatically by-half. About a half of land, copper, silver, and engineering plastics are saved as resources. Resistive losses of conductors, joints, and appliances are reduced by about 50%.

4. Temperature Protection: The capacitor is equipped with a temperature sensor that can reflect internal heating caused by over-current, over-harmonics, excessive leakage current, and high ambient temperature. Then, over-temperature protection kicks in: upon reaching the set temperature limit, the capacitor is automatically disconnected and taken out of service so as to protect the equipment.

5. Intelligent Networking: A network is automatically formed when multiple intelligent power capacitors are networked. The one with the smallest address code acts as master, while the rest acts as slaves forming a low-voltage reactive power automatic control system. If an individual slave fails, it will automatically withdraw without influencing other slaves. If the host fails, it will withdraw as well and a new host will evolve from among the remaining slaves to form a new system. Capacitors with the same capacity are switched on and off in a cyclic manner while capacitors with different capacities are switched on and off in line with the right compensation principle. It can also connect with a background computer for centralized distribution management via the 485 communication interface.

6. High Reliability: The controller is removed, and decentralized control is adopted: this removing any chance of total system failure due to controller malfunction. In turn, intelligent over-zero switching orchestrates zero inrush current impact, zero operating overvoltage, and zero arc reignition during capacitor switching. Therefore, the failure rate is one of the lowest, which absolutely resolves the issue of contactors and capacitors being constantly damaged using the traditional method.

7. Modular Structure: The product is standardized and modularized to replace traditional controllers, air switches, AC contactors, thyristors, thermal relays, and capacitors. These elements are integrated into one unit, with a block-stacking method for cabinet installation. 

8. Simple Wiring: For multi-capacitor cabinet installation, the workman-hours required have been reduced by more than 60% when compared with the traditional methods. At the same time, the conventional method requires connecting 80% more wires and 80% more nodes. Less wiring also makes for a clean interior of the cabinet, thus permitting faster assembly at the work site.

9. Convenient Expansion: The product is of a small size and simple wiring. With the apparent increase in power load of electricity users, capacitors can always be increased at anytime. This resolves routing complications and rigidity of the traditional methods; thus, it accounts for enterprise development needs and phased investments.

10. Convenient Maintenance: It consists of a user-friendly human-machine interface. It displays protection-type actions like overvoltage, undervoltage, overcurrent, overtemperature, and three-phase imbalance. Meanwhile, the intelligent power capacitor self-diagnoses and presents to the display faults in the electronic switches, capacitors, air switches, and intelligent module network communications, making it conducive for fault rectification on-site.

11. Remarkable Effect: It ensures that the system voltage is stable and within the acceptable limit, improves the power factor, is predictive of the input capacitor, and ensures that no overcompensation occurs to avoid fines due to excessive reactive power. It enhances the active power output of distribution transformers, decreases investment on capacity augmentation, saves energy, and minimizes losses.

Protection Wiring Diagram

Product-related dimensions