/An overview of the flameproof reactive power automatic compensator for mining:
/ The flameproof reactive power automatic compensator for mining (hereinafter referred to as the compensator) is connected to the inductive load
Compensation is implemented where inductive reactive power occurs. The compensator mainly automatically compensates the reactive power underground in three-phase electrical equipment with a frequency of
to improve the power factor of asynchronous motors and reduce line losses and voltages. Reduction,
to achieve the purpose of improving the operating conditions of the motor and saving electric energy.
Two conditions of use: :: :
The compensator should be able to work normally under the following conditions:
) The altitude of the installation and operation area does not exceed
b) The ambient temperature range is ℃ ~+℃, the relative humidity is not greater than % (at ℃
) An environment without severe impact and strong vibration
) An environment without destructive and corrosive gases
) The surrounding air contains methane coal Dust and other explosive gases.
)The installation category is III.
Explosion-proof type: Mine explosion-proof type, Explosion-proof mark:
Basic parameters
① Rated capacity: not greater than r.
②Rated voltage: (It cannot be used universally, it can only be used as a line)
③Rated frequency:
④Working system: long-term working system.
⑤Capacity deviation: %
⑥Loss/r
⑦Maximum allowable AC current: times rated current
⑧Maximum allowable AC voltage: times rated voltage
⑨Compensation power Factor effect: above (can also be determined according to user requirements)
Basic parameters of the controller
Power supply voltage % Power frequency:
Signal frequency: Signal voltage:
Signal current: Complete machine Power consumption: <
Measurement accuracy
Voltage % Current %
Power factor % Active power %
Reactive power % Grid frequency %
Controller parameters (normal operation All parameters must be set according to the actual situation, otherwise the controller cannot operate normally)
○Current transformation ratio:
This value is the transformation ratio of the main loop current transformer, : input.
○Voltage transformation ratio:
The value here is the transformation ratio of the voltage transformer,: The input of the input.
○Overvoltage setting:
The overvoltage value can be set as a percentage of the rated voltage
○Undervoltage setting:
The undervoltage value can be set as a percentage of the rated voltage
○Harmonic protection setting:
The voltage harmonic rate and current harmonic rate can be set
○Capacitor switching delay
When the controller detects that the capacitor compensation needs to be put in, a delay is required. for a period of time to avoid system fluctuations causing switching oscillations.
Therefore, it is necessary to take into account the actual situation of the system and reduce the number of switching actions to reasonably set the delay time.
○ Capacitor input threshold (capacitance multiple) setting:
When the reactive power is higher than the capacitor threshold capacitance, switching begins, and the switching coefficient step is factory preset
○ Cut-off threshold setting (power factor ):
When the controller detects that the power factor of the grid is lower than the threshold, the controller selects an appropriate capacitor for input. When the power factor
is higher than the threshold, the controller will cut off the input capacitor.
○Working mode setting:
The controller’s working mode is encoding.
○Capacitance setting:
The capacitor capacity should be based on the power number of the capacitor corresponding to the actual connected control output terminal. For the output terminal without a capacitor connected, the capacity corresponding to the capacitor number should be changed to, control The device identifies the coding method of the capacitor according to the capacitance input, performs optimized switching, uses fuzzy control, and comprehensively matches the switching times, discharge time, etc. to complete the processing. Therefore, the setting of the capacitance It is very important that the capacitance needs to be appropriately corrected according to the usage time and voltage level
to ensure that the controller can accurately control the operation and achieve the expected effect of the power factor of the grid.
Structure and working principle: :: :
Structural overview
○The compensator consists of two parts: a flameproof shell and a main body. The shell has two cavities: the wiring cavity and the main cavity. The box door adopts a screw-fastened structure. The door is equipped with an observation window, which can observe the operating conditions at any time. There is a setting button below the observation window to debug the controller parameters. It is easy to use. There is a Terminals.
○The electrical part of the compensator is composed of isolating switch, vacuum contactor, current transformer, voltage transformer, control transformer, current limiting inductor, capacitor protector and controller.
○The lower part of the box is equipped with two buttons, which are for isolating switch locking and capacitor switching.
7 Safety and Maintenance: :: :
Before going down the well, you must conduct inspections on the well to check whether all electrical components are working properly.
Open the wiring cavity and connect each cable lead according to the wiring label.
During routine maintenance or when a malfunction occurs, open the main chamber door, check each capacitor and connecting parts, and replace any damage immediately
When repairing and replacing components, special attention should be paid to protecting the explosion-proof surface.
During transportation, it must not be affected by rain or snow, or suffer strong impact or collision.
★Maintenance instructions: During maintenance, attention should be paid to carefully protecting the explosion-proof surface and not being bumped or scratched. The junction box cover must be tightened in accordance with the standard requirements
and the spring gasket must not be missed or lost. Install less sealing rings of the introduction device, and tighten the pressure plate according to coal mine safety regulations or equipment integrity standards.
★★Warning: It is strictly prohibited to open the cover while the power is on. Strictly follow the warning instructions on the shell and open the cover after a power outage for several minutes (to ensure that the capacitor is fully
discharged
8. Transportation and storage::
When the product is lifted without a packaging box, the sling can be placed under the outlet of the product, and lifting and lifting must be carried out slowly.
During transportation, it must be moisture-proof, rain-proof, and dust-proof, and rolling and inversion are not allowed.< br/> The product should be stored in a warehouse where there is no immersion in rain or snow, air circulation and relative humidity are not greater than % (+℃
℃
) and the temperature is
~+℃
.
9. Unpacking and inspection:
Before unpacking, the relevant signs on the box, such as product name, specification, quantity, receiving unit, etc., should be checked against the receipt.
When unpacking, the relevant signs should be checked gradually. Remove the outer packaging to avoid damaging the outer surface of the product.
Check the following items after unpacking
① Whether the external parts of the product (operating handle of the inlet and outlet device, etc.) are damaged
② The packing list is qualified Verify whether the product manual is complete
③ Whether the product nameplate and various labels are complete.
Ten ordering instructions:
Compensator model
Working voltage
Compensation capacity
Number of units to order
Jining Haichuan Industrial and Mining Equipment Co., Ltd. (r,) is located in Jining, the hometown of Confucius and Mencius, the hometown of the Water Margin and the canal capital. It has a superior geographical location, developed communications and convenient transportation, rich mineral resources, many varieties and large reserves, and is concentrated in Yan Mining Group Jining Mining Group, Zibo Mining, Feicheng Mining, Zaozhuang Mining, Linyi Mining, Xinwen Mining Group, etc., are one of the civilized coal bases in the country. Jining Haichuan Industrial and Mining Equipment Co., Ltd. mainly operates mining equipment and accessories, Wujinjiaodian Instruments, Electronic Products, Engineering Machinery Electrical equipment and accessories, lighting fixtures, etc., is an industrial and mining equipment supply enterprise integrating industry and trade. The company's business philosophy is: development, innovation, integrity, management, reasonable pricing, continuous improvement, and customer satisfaction. Over the years, the company has cooperated with many excellent brands of professional mining equipment. With the eternal goal of pursuing excellence and repaying society, we are committed to building an excellent industrial and mining equipment supplier and service brand, gaining trust and praise from customers. We sincerely cooperate with you and serve you wholeheartedly. We welcome new and old customers to call us for consultation, negotiation, and create a better future together. The future.
Mine explosion-proof reactive power automatic compensator