What a suitable power capacity for frequency converter if the loads are motors and pumps?
If the load type is inductive such as motors, pumps, there would be high inrush current existing when it started, with motor (without a soft start facility) typically start-up current 5 to 7 times the stated nominal rating of the motor, it is recommended that a frequency converter is selected that is 3 times the stated rated capacity of the motor or more.
What a suitable power capacity of frequency converter for transformers and capacitors?
Inductive and capacitive loads such as transformers and capacitors, their active power is very low but reactive power consumption is pretty higher, this would result in a decrease in the utilization rate of the frequency converter. For instance, when a inductive or capacitive load with 0.2 power factor and 5kW power rating, one 30kVA power capacity of frequency coverter is recommended.
How do I select a correct capacity of power converter for my application?
Please check the nameplate on your application or load, there is Horse Power in KW on the name plate, please consult to vendor for a suitable rating power converter. The power converter can be used to any resistive, inductive and capacitive loads.
How to size the Frequency Converter for my load applications?
Basically, when we sizing the Frequency Converter, the horse power on its nameplate is often stated in kVA. If using equipment nameplate ratings for sizing, the kW rating of a load to be no greater than 60% of the kVA rating of the Frequency Converter, so please always leave a proper margin when you decide to buy a frequency converter for your electric load applications.
Do you issue the authorized reseller or offices in overseas?
We are very careful as to whom we choose to represent the Doer Power and associated solutions. The reseller or distributor for Doer power must be qualified to sell, support and ideally ultimately inventory capabilities
What Tariff Number (HS Code) for your products?
The Harmonized Commodity Description and Coding System (HS) of tariff for our frequency converters and relevant products are 850440.
What methods of payment do you accept?
- T/T: ideally all payments should be made by Telegraphic Transfer”or “Wire Transfer’’. Account number to which payment should be made are clearly written on Proforma Invoice or Contract
- Credit Card / Debit / Visa / Master Card: We accept all these ways of payment if your order amount not exceed 4500USD
- Paypal; We accept payment by Paypal for small amount order value under 2000USD
- Letter of Credit: As a general rule we do not accept payment by Letter of Credit unless the order value is exceeded to 150,000USD, or the buyer’s country only allows letter of credit.
What shipping documents you provide?
Normal standard shipping documentation includes – Commercial Invoice, Packing List and Airway Bill or Bill of Lading.Products Certificate of Conformity, any Third Party Conformance Certification, Certification of Origin can be provided on request.
Does the power unit comes with cables?
The input and output cables were not included in the shipment, these should be sourced at local with the help by electrician.
What means of shipment do you have?
There are two ways either by Sea or Air freight. We are more than happy to quote for the freight services – with our charges normally being based on volume of the consignment for sea freight and weight for air freight, your preferred or most convenient air or sea port, besides, we also provide DAP and DDP service with delivery at place, customs clearance and customs duty included. Should you prefer to organize your own forwarder logistics arrangements, with your designated local shipping agent collecting the goods from our factory.
Do you have any products in stock?
The products that we supplying are mostly customized, however, we do have some standard products in stock, please check with our sales team before place an order. The production and test process usually takes 15-20 days.
Are you a Manufacrturer or Trader?
We’re manufacturer, all our products are manufactured and designed in China, products fabrication and test where located in Guangdong province, while marketing, products Research and Development with the help of strong research institutes and military equipment manufacturing capabilities in Xi’an Shaanxi.
What is the availability of spares?
At Doer power tech. the uncompromising quality of our products allows us to offer standard and extended warranty provisions that are market leading in all aspects. For spares required under valid warranty claim situations, spares are supplied free of charge. Delivery of these spares is normally arranged through the express door to door courier services of DHL or FedEx. We have strategic inventory and accurate process and stock control to deliver near total availability on commonly requested spares. For most request we are able to offer delivery direct from inventory and strive to offer in emergency situations a 24 to 48 hours turn around on shipment.
What trade terms you propose?
In most cases, our trade method is Ex-Works terms; We also offer FOB, CFR, and CIF options according to the requirements of the customer, we also provide DAP and DDP terms to ensure that the customer can receive the goods in hassle free and fastest way.
What is your Warranty policy
We provide 2 years products warranty to our customers, and lifetime warranty.
Do you have a Price List?
We do not issue Price List other than to authorized distributors and for specific project request. If you could provide us details of your specific requirement, we would be delighted to give you the best discounted price for reseller.
Why i buy from you?
No one likes paying more for less!Our flexible strategy to overseas customer enabled us to continue to deliver One-stop service and quality products at competitive prices.