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DYDZB series low voltage compensation cabinet
Scope of application
Applicable to low-voltage 660V and below power distribution systems for power factor compensation, as well as in-situ power factor compensation of asynchronous motors, to achieve automatic power factor adjustment, reduce reactive power loss, stabilize grid voltage, and improve power supply quality.
is widely used in electric power, machinery manufacturing, automobiles, metallurgy, coal mines, chemicals, oil fields, electrified railways and other industries.
Working principle diagram
Working principle and characteristics
DZB-J series adopts a microcomputer-type central controller, which automatically controls the switching of capacitors according to the power factor level, so that the power factor meets the set requirements;
The DZB-D series low-voltage dynamic reactive power compensation device is the thyristor switching capacitor device. The device adopts a non-contact switch composed of high-power thyristors. The reactive power compensation device and the power grid are regarded as an organic whole, and the reactive power compensation device and the power grid are regarded as an organic whole through detection of the power grid and reactive power compensation. The basic electrical quantities and zero-transition process conditions of the device automatically track and analyze the operating status of the power grid and reactive power compensation devices. According to the principle of conservation of electromagnetic energy, when the capacitor does not need to be discharged, the capacitor can be dynamically switched at the time of the zero-transition process of the system. Group, make the Philippine periodic attenuation component of the dynamic current and voltage of the power grid close to zero, so as to realize the dynamic reactive power compensation of the zero transition process, reduce losses, stabilize the load voltage, increase the transformer load capacity, and improve the harmonics of the power supply system Voltage distortion rate. It is an updated product in the field of reactive power compensation.
1. Zero-crossing switching: using thyristor zero-crossing switching technology to achieve zero voltage input, zero current removal, and no inrush current and overvoltage;
2. Fast response speed: fast tracking system load reactive power changes, real-time dynamic tracking, response speed ≦20ms;
3. Intelligent compensation: The configuration can only monitor the terminal, and can display all the parameters in the power grid in real time. Through the RS485/232 communication port, it can realize remote telemetry, remote signaling, and remote control;
4. Complete protection functions: With multiple digital protection functions such as overvoltage, undervoltage, overcurrent, temperature, and phase loss, it can be used for three-phase compensation or split-phase compensation.
Conform to the standard: GB/T15576-2008 general technical conditions of reactive power static compensation device
Dynamic response time: less than 20ms
Compensation capacity: (kvar): 50-1000Kvar, can be configured according to user requirements
System voltage level: 230-660V
System frequency: 50Hz
Control power supply: AC220V (AC380V needs to be customized)
Switching level: 1-15 level
The device can run for a long time under 1.1 times the rated working voltage
The device can continuously operate under an overcurrent whose root mean square value does not exceed 1.3 times the rated current of the capacitor bank
Compensation power factor: ≥0.9
Environmental temperature: -30℃—+50℃
Structural form: optional standard cabinets such as GGD, GCS, GCK, MNS, etc., can be installed in parallel with the low-voltage power distribution cabinet, or can be designed and manufactured according to the actual needs of users
One time plan