Safety and stability of the electric power supply becomes more and more essential and crucial. Earthing method of the neutral point is one of the most important and effective factors for the above targets. With the increase of number and capacity for the power distribution cable lines , the single phase earthing fault current will increase greatly according to the line to earth capacitance. and the arc is hard to extinguish that will cause over voltage easily and lead to trip of power supply frequently.
Product Feature:
Full series product：products cover 6kV-66kV，independent design and production of all primary and secondary equipment of arc suppression coil.We have good research on the performance of various type of products and we accumulated rich operation experience.
High reliability: controller adopts the secondary power supply technique,can withstand destructive electromagnetic interference,the primary and secondary system all adopt the optical/electrical isolation,can completely eliminate the interference of a system to the controller.Controller design for double reset circuit,which can realize the system automatic recovery.
Accurate fault line selection function:the system is equipped with fault line selection mudule,which can realize fault line selection for 48 lines.(parallel line unlimited).Product adopts a parallel resistor fault line selection function.The resistor will input for a short time when earthing occurred,it will change the current amplitude and phase position obviously.So we can accurately choose the ground fault circuit.
Product features for tap-change and capacitance change product:
- Quick compensation ： quick current compensation within 10 μS which can greatly reduce the probability of permanent malfunction
- Reliable system： preset apparatus is simple structure，and independent of power and controller；In case of loss of power and controller fault，ARCs can compensate capacitive current
- Damping resistor protection adopts primary equipment completely isolated with secondary eqipments.
- Perfact protection function:including gear head lock,return regulation lock,continuous regulation lock,regulation lock of single phase earth fault etc，to make the whole system operation safe and reliable.
- Wide adjusting range：phase-controlled arc suppression coil conducts adjustment by change the conduction angle of thyristor and can conducts adjustment continuously within the range of 0%-100%.
- Low residual current: phase-controlled arc suppression coil adjust smoothly,can make the residual current to the minimum,ensure reliable arc.
- Quick compensation：phase-controlled arc suppression coil adopts industrial control with PC104 and DSP for rapid acquisition and calculation, quick current compensation within 5 ms.
Schematic diagram
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Mob: +86 0 138-3227-7552 (Jack) |
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Mail: weifan-Jack@mfrdo.com |
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Q1. Are you the manufacturer or trader?
A:WEIFAN is a leading & professional manufacturer located in hebei province of China.
Q2. What is your main markets?
A:Our main market is in home & a half in South-East Asia, Middle East,West-Africa, East-European countries & Some South America..etc
Q3. What is your delivery & after-sales serive?
A:The delivery is according to order qty, normally for containers order we need 1 month. Per each month 20 containers (20’ft or 40’ft)are no problem for us .
We can answer user’s question and solve their problem in 24 hrs per each day and give full technical support in time to all of our products.
Q4. What is your product warranty?
A:Firstly we have quality certificates like CCC, ISO9001..etc .We supply 18 months quality guarantee,during this period we supply free repair,maintenance and technical support.
Q5.Do you accept OEM and ODM?
A:Yes. Our R & D team owns latest technology ,can develop & produce products as customers’ drawing & under their brand
Q6. What is your payment terms?
- 30% T/T in advance as deposit ,balanced against the shipping documents
- irrevocable L/C at sight for order which amount is over 100 thousand USD
- for old business partner,we can negociate together for other special terms
- For samples, we accept T/T,Western union, moneygram, paypal..etc
Q7. What is your terms of packing?
A: Generally, our packing is wooden case or customized packaging according to customer needs.
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