220V 50/60Hz Vsp PWM RS485 IP54 Ec Backward-Curved Centrifugal Fan

• Customization: Available
• Application: Industrial
• Operating Speed: High Speed
• Model NO.: EC133A1
• Excitation Mode: Excited
• Function: Control
• Casing Protection: Protection Type
• Number of Poles: 4
• Structure and Working Principle: Brushless
• Type: Sino-Pan
• Certification: CCC
• Brand: Sino-Pan
• Transport Package: Carton Box Plywood Box
• Specification: 400*400*265
• Trademark: Sino-Pan
• Origin: China
• Production Capacity: 1000

Product Description

EC Backward-curved Centrifugal Fan  OEM/ODM


 

Product characteristics
EC Backward-curved Centrifugal Fan,diameter of the fan ranges from 133mm to 630mm. The fan is made of plastic material (≤ 250mm) or metal material (≥280mm). The performance of the standard version basically covers the requirements of conventional
applications. Product certification: CCC, on demand certification CE, UL

Component of product
Backward-curved centrifugal fan, EC external rotor, motor, Collecting ring.

Working environment and applicable conditions
Power supply: Single-phase 220V~240V, 50/60 Hz
Three-phase 380V~460V, 50/60 Hz
Control mode: VSP (on-demand VSP/PWM, RS485)
Protection level: IP 54
Insulation class: F
Bearings: maintenance-free bearings
Operating temperature: -25~+60ºC
Relative humidity: ≤95%
Altitude: ≤1000m

Applications
It is widely used in air purification, ventilation system, HVAC, refrigeration, rail transit and electric Max Power communication., etc.

Code Regulation



1  EC  Backward-curved Centrifugal Fan
2  Fan Specifications
3  Model number code Marked with(A-Z)
4  Version number 1-9

Fan Performance Curves
The fan performance curves can clearly show the characteristics of different types and sizes of fans by graphical representation. It usually includes the full range from free delivery (unimpeded air flow) to no delivery (a system where the air flow is completely
sealed). The gas flow rate (qv) can be represented by one or more of the following parameters:
Static pressure         Ps
Total pressure         Pt
Power                N
Fan static efficiency    ηs
Fan total efficiency     ηt
The following figure is a typical fan performance curve. These curves are generally subjected to laboratory tests in accordance with appropriate industrial testing standards, usually under standard atmospheric conditions. Standard atmospheric state, usually refers to the altitude of 0m, temperature 20ºC, atmospheric pressure 101.325kPa, the delivery of relative humidity 50%, density 1.2kg/m3 air.


System Resistance Curves
System resistance refers to the sum of all pressure losses along the filter, evaporator, condenser, baffle, air valve and pipeline in the air duct system. It is usually positively related to the flow of gas through the system. A typical system resistance curve is shown
as follows:



Operating point
The operating point of the fan in the system is determined by the intersection point of the system resistance curve and the fan air volume static pressure curve. Usually combined with the efficiency curve of the fan, the operating point is set near the high
efficiency point of the efficiency curve, which can give greater play to the performance of the fan and save energy.




For a given duct system, the system resistance curve is not static. If there is dirt in the filter, the coil begins to condense water, or the outlet regulator changes its position, the system resistance curve will change. In this case, the corresponding design resistance is
different from the actual resistance, and the operating point will change.
In many cases, the difference between the actual output of the fan and the calculated output is caused by changes in the resistance of the system, not by the fan or motor. As shown below, the actual system has more resistance loss than the preset, so the air volume decreases and the static pressure increases.


Principles of Fan Selection
The When selecting the fan, we should first determine the air volume and pressure required by the system, that is, the operating point. How much air volume we want to get, we need to overcome the corresponding system resistance. Please refer to the principle of confirming the operating point in "Fan Foundation". After clarifying the working conditions, the size range of the fan can be quickly confirmed according to the
chart.

Secondly, confirm whether the size of the installation space matches the size of the fan. Try not to install a larger size fan in a smaller space, which will increase the resistance of the system and make the operating point offset. Under the same air volume, it is necessary to overcome greater resistance, which outweighs the loss. Again, confirm the use of the fan environment, electrical environment, control mode, installation mode and so on. Please provide as much information as possible to our business manager and R&D
manager, as much detail as possible. In this way, we can match products with higher cost performance under the condition of meeting the use requirements.

Effects of Temperature and Altitude
In the actual selection process, some fan applications are distributed in different altitudes and temperature environments, and the environment has a great impact on the density of the gas. The fan performance curve can not be directly applied to the selection, and the corresponding conversion adjustment is needed to determine the operating point. The effect of temperature and altitude on air can be expressed by the following formula:

Where:
ρ0=1.225kg/m3 -- Standard atmospheric density
Z, t -- Local actual Altitude & Temperature
ρ1 -- Local atmospheric density
If:

Then:

Then (e) is the correction coefficient of air density. From the above, the following table can be obtained:
Table of correction coefficients for atmospheric density

Therefore, the change of altitude and temperature,it is only reflected in the change of the density of air. According to the fan similarity theory:

It can be seen that at the same speed of the same fan, the airflow has nothing to do with the change of air density, and the static pressure, power and air density show a function relationship. According to the pressure loss formula, pipeline head loss formula and continuity equation:

It can be seen that under the same system, the air density change has nothing to do with the total head loss coefficient (hw) of the system, and the air density change is a function of the pressure loss. For a given fan system, changes in altitude and temperature are reflected in air density. The change of air density will show the following characteristics on the performance curve: the air volume value of the fan at the design working point will never change, but the static pressure and power will change linearly with the density. The rate of change is equal to the atmospheric density correction factor.
To sum up:
Local fan airflow = standard fan airflow
Local fan static pressure = e * (Standard fan static pressure)
Local fan power =e * (Standard fan power)


When the difference between the local atmospheric state and the standard atmospheric state is large, if the fan with the standard atmospheric state is directly used to calculate the operating point, the performance of the selected fan will be greatly different from the design goal when the fan works in the local state. The actual fan performance curve of the fan in the local area should be calculated by the local atmospheric state, so as to accurately achieve the matching of the operating point and select the appropriate fan.


Fan Selection Process
1. Confirm the operating conditions: airflow and static pressure;
2. Confirm the type of fan and the size of installation space;
3. Confirm the operating environment and electrical environment of the fan;
4. From 1, 2 and 3 points, preliminary screening meets the standard product specifications;
5, Confirm the control mode, installation mode, etc.
6, Confirm accessories, leads, connectors, etc.;
7. Confirm the certification requirements;
8. Confirm whether the screened products meet the requirements at 5, 6 and 7 points;
9. If it is confirmed feasible at 8 points, you can directly place an order with the business manager; Otherwise, corresponding requirements can be put forward with the business manager, and the development plan can be concluded. After the cooperation is reached, the modified development and customized development can be carried out.




Material: Impeller: Nylon with Glass Fiber
Direction of rotation: Clockwise, seen on rotor
Control input: 0-10VDC/PWM
Type of protection: IP 54
Insulation class: F
Bearing: Maintenance-free Ball bearings
Approval:CE
Amb.Temp: -25~+60ºC







Material: Impeller: Aluminum alloy 5052
Direction of rotation: Clockwise, seen on rotor
Control input: 0-10VDC/PWM/RS485
Type of protection: IP 54
Insulation class: F
Bearing: Maintenance-free Ball bearings
Approval: CE
Amb.Temp: -25~+60ºC