| The neutral point grounding resistor is connected to a current limiting electrical protection device between the neutral point of generator and transformer and the earth. |
| When the power grid line fails, the voltage of the neutral point of the power supply will be offset, especially in the power grid system of the cable. The ground capacitance current is larger. When the current is larger than the specified value, the overvoltage will be generated by the arc grounding voltage, so that the voltage of the non fault phase to the ground voltage is greatly added and the insulation damage of the equipment is formed at two points. The fault of blackout is caused by the short-circuit of multiple grounding. The purpose of using neutral point resistance grounding method is to inject the resistive current to the fault point, make the grounding fault current in the resistance capacity, reduce the phase difference with the voltage, reduce the reignition rate after the zero crossing of the fault point, limit the overvoltage to a certain level, and improve the sensitivity of the relay protection equipment to realize the trip and fast. Quick search for faulty line and standby switch, so as to effectively protect the normal operation of the system. |
| Tell me your needs, I will provide you with a solution | |
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Mob: +86 0 138-3227-7552 (Jack) |
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Mail: weifan-Jack@mfrdo.com |
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WhatsApp: +86 138-3227-7552(Jack) |
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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.
