RNSH-M Capacitor

Vacuum Filling Technology

The winding unit is dried within a specified time after heating and filled under vacuum conditions, and air and moisture are thus discharged from the inside of the capacitor to prevent electrodes from oxidation and partial discharge. After that, the capacitor is sealed in a steel container. This complicated process ensures that the capacitor has excellent capacitance stability and long service life.

Self-Healing Technology

The capacitor may have a breakdown due to overheating, overload or approaching to its service life. This creates a small arc, which can evaporate the metallization layer in the breakdown area within a few microseconds, and the air pressure generated by high temperature in the area blows the vaporized metallization layer out of the breakdown area at the same time, thus forming an insulating area without metallization layer in the breakdown area. During and after the breakdown, the capacitor can still work normally, and the loss of the capacitor caused by self-healing is less than 100pF, namely the loss degree can only be verified by precise measuring instruments.

Over-Voltage Separator

Electronic components do not have infinite service life, and it is the same with self-healing capacitors. HRC fuse or circuit-breaker alone cannot provide sufficient protection.

All the capacitors mentioned in this Manual are equipped with overvoltage separators. When a capacitor suffers from a large amount of electrical breakdown due to overheating, overload or approaching to its service life (within the scope mentioned in IEC60831), the length of the capacitor changes due to bending of the top cover or stretching of the expansion concave edge. When the expansion exceeds the limit, the internal connection line will be separated, i.e. separated from the capacitor.

RNSH-F Reactor

Overview

Electric energy is an extremely important productivity factor in industrial production and our goal is how to use it effectively and it is found that reducing reactive current through power factor correction is helpful to save electric energy. Non-linear circuits generated by the extensive use of modern power electronic equipment (drive, UPS, etc.) are affecting the power grid in harmonic mode and aggravating its load (grid pollution).

In the power factor correction system, the capacitance of the power capacitor is connected to the transmission transformer to form a resonant circuit, and the self-resonant frequency of this circuit, as shown by experiences, is generally between 250 and 500Hz. Resonance can lead to the following adverse consequences:

Overload of capacitor;

Overload of transformers and transmission equipment;

Interference with measurement and control systems and with computers and electrical transmission devices;

Increase of resonance, i.e. harmonic amplification;

Voltage distortion;

These resonances can be avoided by connecting in series with reactors with harmonic choke. The natural vibration frequency of the detuning system should be lower than the lowest harmonic frequency of the circuit. In this way, for the harmonic wave higher than the frequency of the circuit, the detuned power factor correction system is pure inductive, and for the harmonic wave with a frequency of 50Hz in the circuit, it is capacitive, and thus the reactive power can be corrected.

The reactor provided by RNSH-F is an iron core reactor, which can be applied to high and low voltage, and the high precision lamination sheets may eliminate the inductance error between three phases to ensure the tuning accuracy of reactor and control by computer of winder, the winding of which is made of copper wire. All the products are poured with polyester resin in vacuum, and each phase is finely adjusted to meet the requirements of relevant standards, and the production process shall be subject to DIN EN ISO9001.