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DCES is a multifunctional electrical safety active defense device designed for low-voltage frequency converters, including voltage short-term interruption support and voltage sag regulation. It can seamlessly address issues such as voltage fluctuations and voltage short-term interruptions in real-time.
DCES uses supercapacitors for energy storage, outputs DC DC power, and connects to the frequency converter as a backup power source. Completely isolated from the frequency converter during normal operation. When the fluctuation value of the power grid voltage does not reach the set value, the system does not work and is in a hot standby state; When the voltage fluctuates within the protection zone, DCES starts working to ensure the normal operation of the frequency converter; When the voltage of the power grid is restored, DCES automatically exits the working state and switches to the hot standby state, and the frequency converter automatically switches to be powered by the power grid; When the external interlocking input action or the frequency converter stops running, the device automatically exits and switches to the hot standby state.

VAAS is a multifunctional electrical safety active defense device that combines voltage short-term interruption support, voltage temporary drop regulation, voltage temporary rise regulation, load interference suppression, three-phase imbalance suppression, etc. It can seamlessly manage problems such as power shaking and voltage short-term interruption in real time.

The VAAS can cut off voltage sag power source for short time, typically 1~3s, and supply power to load during the voltage sag moment. It can support power supply, adjust the voltage sag, adjust and the voltage raise, eliminate the load reference and provide real time monitoring of fault arc.

VAAS consists of a thyristor bypass section, a converter section, and a supercapacitor energy storage section. The thyristor bypass section is used to quickly turn off the thyristor in case of abnormal system voltage. The inverter section is used to store energy for energy storage devices and output compensation voltage. The filtering part ensures that the generated load side voltage meets the requirements.

The SAVS is a multi-function recorder that includes the features of many separate instruments for monitoring a power system. These include system stability, and power quality. SAVS can be used both on HV and LV bus.The voltages and currents on three phase lines are recorded via standard instrumentation transformers to 16-bit accuracy. The state of protection relays and switchgear can also be monitored via auxiliary switch contacts.