Product Specifications
Product Description
Product use:
This product is appropriate for intelligent control of start and stop of various kinds of DC motors (especially high-power motors exceeding 10KW) and is mainly applied to control of DC oil pumps at heat-engine plants, such as DC lube oil pumps of main engine and small motors, hydrogen-side and airside DC sealing oil pumps. As an upgraded product of traditional control modes, it is featured by advanced operating principle, safety and reliability, simple structure, low failure rate and convenient maintenance etc.
DC oil pump motor control cabinets can be widely applied to: control of DC motors in power plants' DC oil lubrication system, control of water pumps in chemical enterprises' reaction still water cooling system and control of water pumps in smelting, casting induction furnaces' water cooling system. It can realize smooth soft start and operation of DC motors and can be applied to fields like speed regulation of various DC input motors and excitation system.
Functional characteristics
1. Eliminating impacts and interference with DC power supply system when starting is implemented via traditional starting modes;
2. Eliminating all kinds of shortages caused by using DC contactors to control switching;
3. Since digital PWM switch mode is used, no electric energy loss or heat is caused in the starting process;
4. It realizes stepless start and stop of DC motors perfectly and working current rises or decreases smoothly according to an optimal control curve;
5. Remote or on-site operating modes are flexible and convenient and it can also link with the signal that pressure of the mother pipe is low to start DC oil pumps;
6. It has two control modes including manual mode and Chinese (English) touch liquid crystal display (LCD) and can give real-time display of operating parameters and record various fault messages. Parameter setting is convenient and rapid;
7. All electron devices are imported products with original packing and power devices utilize SIEMENS IGBT. Burn-in screen is carried out strictly;
8. SIEMENS logic control devices is used for programming and high-pressure soft-start control units that are specially developed are matched as a core to form a reliable control system jointly;
9. With modular design, it has compact and reasonable structure so that installation, debugging, operation and maintenance are convenient;
10. Compared with series resistance starting mode, the system has little calorific value and good capacity of resisting disturbance.
Properties and parameters
1. Working voltage: DC110V,220V,230V,240V,250V,380V (±10%);
2. Motor capacity: 3KW--75KW;
3. Control signal: 0-5V;
4. The time that current takes to rise to its rated vale: 0-70 seconds (adjustable);
5. Precision of steady current: better than 1.5%;
6. Overcurrent protection operating parameters: 120% of rated current (optional);
7. Overheating protection operating temperature threshold: 70ºC (external temperature);
8. Heat-dissipating method; natural cooling;
9. Current signal: 4-20mA, 1% precision;
10. Communication port: RS232 and RS485 (optional)
V. Service conditions
1. Environment temperature: -10ºC~+55ºC. average temperature does not exceed +35ºC within 24 hours;
2. Relative humidity: relative humidity does not exceed 85%;
3. Storage temperature: -25ºC~+70ºC. No energizing quantity is added under limit values and the device will not have irreversible change. After temperature recovery, the device should work normally;
4. Atmospheric pressure: 86kPa~106kPa;
5. Installation mode: cabinet (case) should be vertical to the floor and installation gradient must not exceed 5%;
6. Seismic intensity: 8°;
7. Service environment: altitude does not exceed 2000m. There must not be mediums with explosion hazards, and surrounding mediums must not contain gas that will corrode metal or destroy insulation or conducting medium. Besides, such mediums must not be full of water vapor or serious moulds must not exist.
VI. Operating principle and application
1. Operating principle
The speed regulating system is organically composed of PWM driving controller, soft start controller, high-performance IGBT module, PLC, touch screen, switching power supply, heat-removal system and protective absorption circuit and controls voltage output of main loop via PWM in order to regulate speed of DC motors.
2. Operating procedures (taking DC220V for example)
(1) Connect DC220V power supply with a corresponding input terminal of the master air switch and link load with the equipment's output terminal.
(2) Covert the near/ remote control switch to a relevant position of needed service mode.
(3) Link of remote control terminals:
Our company is dedicated to produce various electric products like high-frequency switching power, controlled silicon rectifier and electric quality controller and alike, also all of these products have been applied to various kinds of industries, such as galvanization, electroanalysis, oxidation, hard oxidation, electrophoresis and other surface treatment areas, also suitable for the position where needs charge, DC motor speed regulation and alike. At presently, there are many products with our own patents have been evaluated by province-level technical authorities or above, of which, the high-frequency switching power with large power belongs to national key and new product recommended by five ministries and commissions.
Adhering to the operation principle of" Survive by quality and Development by innovation", our company has established stable cooperation relation with Qingdao University and China ocean University and other universities and built up internal technical team, so the reliability and stability of product can be guaranteed.
In recent years, our company has been granted with "National Industrial advance unit" and" Province and City Technology Advance Enterprise" and contracts- observing and promise-keeping enterprise as well as AAA grade credit enterprise by related departments, our "KLN" brand rectifier has been sold through the whole domestic market and exported to as many as 20 more oversea countries in Europe and America, Asia-pacific regions. In the new stage, we, targeted by " To be best manufacturer of rectifier", take participate in international market competition, based on the pragmatic and innovation enterprise spirite, try our best to provide our customers with higher quality products as well as perfect service.
