KRTBB Type High-Voltage Fixed Reactive Power Compensation Device
Short Description:
The KRTBB type high-voltage fixed reactive power compensation device (hereinafter referred to as the device) is suitable for AC power systems with a voltage of 6 to 35 kV and a frequency of 50 Hz. It provides local fixed compensation for high-voltage motors, pumps, and similar equipment, which can improve the operating power factor of high-voltage motors and reduce electricity losses.
Product details
Product Overview:
KRTBB type high-voltage fixed reactive power compensation device (hereinafter referred to as the device) is suitable for 6-35kV, frequency 50Hz AC power system, for high-voltage motor pumps, etc., it can improve the operating power factor of high-voltage motors, reduce power losses, etc. Through comprehensive judgment, the automatic switching capacitor bank and the automatic adjustment of the gear position of the transformer on-load switch realize dynamic voltage control and reactive power compensation, improve the voltage quality, improve the power factor, and increase the economic benefits of the user department. It is suitable for on-site compensation of high-power high-voltage motors and centralized compensation of power distribution systems in metallurgy, mining, building materials, stone, machinery, municipal, and power waiting industries.
Structure and working principle
●The device is a rejection structure or frame structure, which can manually switch the capacitor bank, or can be equipped with a voltage reactive power automatic controller to automatically switch the capacitor bank.
●The cabinet structure device is composed of an incoming isolation switchgear, a series reactor cabinet, a parallel capacitor cabinet and a connected busbar. Capacitor rejection can determine the number of cabinets according to the size of the compensation capacity and the scheme set, which is generally composed of multiple cabinets. The cabinet is made of cold-rolled steel plate bending and welding or aluminum zinc plate bending and assembly, and the cabinet protection level is required to reach IP30.
●Structural layout: When the rated capacity of a single capacitor is 30~100 kWh, the capacitor bank is a three-layer (single) double-row structure, when the rated capacity is more than 100 kW, it is a two-layer (single) double-row structure, and when the rated capacity is more than 200 kW, it is a single-layer (single) double-row structure.
●The frame structure device is composed of an isolation switch frame, a dry hollow reactor, a shunt capacitor frame and a fence. Including zinc oxide arresters, shunt capacitors, single protective fuses, fully sealed discharge coils, strut insulators, copper (aluminum) busbars and metal frames.
●The capacitor bank is placed on a metal frame, and the connecting busbar, strut insulators are combined into a primary circuit according to the set connection method.
●The capacitor bank structure is usually prefabricated, with a solid, stable structure and steel-saving structure, which is easy to install and transport.
●Capacitor installation forms can be divided into single-row three-layer type, double-row single-layer type and double-layer double-row type.
●The connection method of each phase capacitor is usually first parallel and then in series. The surface of the metal frame is hot-dip galvanized or sprayed.
●Stainless steel fence (2 meters high) can be set up around the entire device as needed. The frame material is made of profiles.
●Selection of series reactors, series reactors installed on the neutral point side generally use dry iron core reactors; The series reactor installed on the power supply side generally uses an air-core reactor, which can be stacked in three phases or installed in a font shape.
Ordering instructions
Indicate the voltage level, model specifications and quantity of the product, and cabinet color
The way of the compensation device in and out of the line
Indicate other requirements
Relative humidity: <95% (+25°C)
Working voltage: not more than 110% of the rated voltage;
Working current: not more than 1.3 times of the rated current;
Installation environment: no explosion and easy danger of the surrounding medium, no gas enough to damage the insulation and metal, no conductive dust;
Installation location: no violent vibration and bumps, installation inclination <5%.
The model, capacity and other technical requirements of the compensation device;
the way of entering and exiting the line of the compensation device;
Indicate other requirements.
Performance characteristics
The use of foreign or domestic high-voltage compensation capacitors can directly compensate the reactive power of 3-10KV inductive load power equipment on the spot, effectively improve the power factor of the motor (can be increased to more than 0.95), and the energy saving effect is obvious; reduce the reactive power loss of users, improve the voltage quality, reduce the line loss; improve the load factor of the transformer and the efficiency of the voltage equipment;
The vacuum electroplated film metallized polypropylene film shunt capacitor produced by the process is used, which is small in size, large in capacity and light in weight; The high-pressure jet ejection fuse is used for short circuit protection and the safe operation of the equipment. The open triangle and overcurrent and overload protection are adopted, and the equipment operates safely and reliably. After the device is disconnected from the grid, the residual voltage can be reduced to more than 50V in 3 minutes; The centralized compensation type operates in parallel with the main machine, synchronously and automatically inputs and cuts, has no operating parts, is safe to use, and is easy to maintain.
Technical parameters
Rated voltage: 6KV 10KV
AC Voltage Sampling: 100V (PT Secondary Voltage)
AC current sampling: 0-5A (for example, when PT takes the voltage of the secondary A and C lines on the 10KV side, CT should take the B phase AC)
Voltage setting value: 6-6.6KV 10-11KV can be obtained
Current transformer ratio: 200-500A/5A can be obtained
Action interval: 1-60 minutes adjustable
The action requires system stabilization time: 2-10 adjustable
Power factor setting: 0.8-0.99 adjustable
Normal operating temperature: -15-50°C, relative humidity <85%, altitude 2000m
