It can be divided into two types: FLN □-24kV ( K type single spring operating mechanism ), FLRN □-24kV(A type double spring operating mechanism). The latter type could be equipped with fuse combination, having control and protecting function, which can be used for power supply and substation as a protecting and control device, especially suitable for ring main unit, cable distribution box and switching substation.
Manual operating mechanism
K type spring dual-function operating mechanism:
As a inlet control unit for FLN□-24kV, the working principle of K type spring operating mechanism is spring press and release.
Earthing operation:
Driven by the handle, upper crank arm rotates and presses spring 2 to store energy, when the max energy reaches continue rotate the rank arm, the energy storage spring starts to release energy and drive the upper trigger, enables the connecting bar to drive the crank arm, crank arm rotates and drives the moving contactor for earthing.
Switch on operation:
Driven by the handle, lower crank arm 1 rotates, presses spring 2 to store energy, when the energy released, it drives the trigger 8, enables connecting bar to drive the crank arm, crank arm rotates and drives the moving contactor and load break switch turns on.
Switch off operation:
Rotate the main shaft crank arm counterclockwise by the handle, release the energy storage spring and the load break switch turns off.
A type spring dual-function operating mechanism:
As a outlet control unit for FLRN□-24kV.
Working principle of A type mechanism is same as K type, in addition, it has fuse striker trip function.
For A type mechanism. Electromagnetic trip is also available for customers requirement.
Switch on operation:
Driven by the handle, lower crank arm 1 rotates to press switch on spring 12 and switch off spring 8 at the same time, to provide sufficient energy required by switching off. When the lower crank arm 1 buckles the pin and drives trigger to move, it makes the lower roller wheel tripped, and release the switch on spring and load break switch turns on.
Switch off operation:
Press the switch off button or push the trip pin 2 by the fuse striker, release the spring and load switch turns off.
Earth operation:
Earthing operation of A type mechanism is the same as that of K type.
Motorized operating mechanism
Motor operation can be added to both types of operating mechanisms, which means it can be operated manually or motorized.
Operating voltage: DC48V AC/DC 110V 220V
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1.Ambient temperature: Max.+40ºC; Min.-35ºC.
2.Humidity: Maximum average relative humidity daily average:≤ 95%; monthly average.≤90%.
3.Altitude:≤ 2000m.
4.Seismic resistance:8 degrees.
5.The surrounding air should be free from corrosive, flammable gases, water vapor, etc, and should not be subjected to frequent and severe vibrations.
6.Annual leakage rate;≤0.1%.
Q: Are you a trading company or manufacturer?
A: We are factory with more than 20 years of experience in this field.
Q: Can I get a sample before the bulk order?
A: Yes, we welcome sample orders to test and check quality. Mixed samples are
acceptable.
Q: Can we print our logo/ company name on products?
A: Yes, of course, we accept OEM, then need you to provide brand authorization to us
Q: Do you accept product customization?
A: Yes, of course, please provide specific drawings or parameters, we will quote you after the evaluation
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days. if the goods are not in stock, it is according to the quantity
Q: How to solve quality problems after sales?
A: Take photos of the quality problems and send them to us for our checking and confirmation, we will make a satisfactory solution for you within 3 days.
Q: What are your terms of payment?
A: 30% T/T in advance, balance before shipment.
Factory
Certificate
Address
No.1083 Zhongshan East Road, Yinzhou District, Ningbo City, Zhejiang Province, China
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