Wenzhou Modern Group is a leading company in the manufacture of Power Quality and Energy Saving Products in China.
Milestones:
- 1979: Founded as a manufacturer of transformer based power products
- 1988: Constant voltage transformer introduced and UL certified
- 1992: Became a strategic partner for GE Healthcare in China
- 1995: Obtained ISO9001 quality system
- 2003: Introduction of the patent variable transformer
- 2005: Became a strategy partner of Emerson Network Power
- 2010: Obtain CE for the voltage stabilizer
- 2013: Obtain CE for voltage optimization unit
Strict Quality Inspection:
Features:
1. Silent design with moving Long life roller carbon brushes, High reliability and low maintenance
2. Unique compact dimension.
3. Digital control.
4. Rich protection functions.
5. Efficiency up to 98%
6. Independent phase voltage regulation. Changeable through LCD touchscreen display
on site.
7. Manual bypass, Automatic bypass (Optional)
8. Remote monitoring by RS485 or RS232 or WIFI, GPRS.
Our Patent Structure:
- Our patent carbon brush with high conductivity, small sparks, and long life
- We use low speed, high start torque motor for stable operation
- Patent three phase individual voltage regulator, which realizing the whole unit 2/3 smaller than traditional one.
Specifications:
| Input | |
| Rated voltage | 380V/400V/415V/460V |
| Input stable voltage range | 304V~456V |
| Working range | 240V~500V |
| Frequency | 50HZ/60HZ |
| Power Factor | ≥0.99 |
| Output | |
| Output voltage | 380V/400V/415V/460V |
| Accuracy | 1% |
| Efficiency | ≥0.98% |
| Wave deformation | nil |
| Power Factor | 0.8~1 |
| Output protected | Under voltage:Vn-20%(Can be reset), Over voltage: Vn+10%, Over Current: In*0.9 |
| Overload Capacity | 150%Over load 10seconds 120%Over Load 60seconds 110%Over Load 10minutes |
| General | |
| Technology | Digital Signal Processing(DSP) And Voltage vector control Technology |
| Method of voltage regulation | Three phase independent regulation with long life roller brush drive by three servo motors |
| Correction time | Step up or step down 10% of rated voltage from the input voltage, The output will stable to rated voltage after 2 seconds |
| Safe start | The AVR will start output after 6 seconds delay |
| Insulation class | H & C class(180℃ & 220℃) |
| Insulation resistance | ≥5MΩ |
| Cooling System | Auto Forced Air |
| Wire system | 3-phase-5-wire-system & 3-phase-4-wire-system without neutral |
| Protection class | IP21(Indoor), IP54(Outdoor) |
| | |
Dimensions
Remote Control:
- Centralized management by computer
- Install special background monitoring software in a computer terminal can realize the remote operation and control.
HOW TO CHOOSE A VOLTAGE STABILIZER?
What's the difference between Roller carbon brush with the Flat carbon brush?
Comparative of the different of Voltage stabilizer:
| | Servo with the roller brush and columnar transformer | Servo with the flat brush and columnar transformer | Servo with the flat brush and Flat transformer | Induction AVR with Oil cooling | Electric AVR | Static AVR |
| Typical efficiency | ≥98% | ≥97% | ≥95% | 80%~90% | ≥90% | ≥98% |
| Power factor | 0.99 | 0.99 | 0.85~0.95 | 0.8~0.9 | 0.85~0.9 | 0.8 |
| Correction speed | 1s | 1s | 1s | Slow, 1 Min | 0.05s | 0.1s |
| Reliability | High | Middle | Low | High | Middle | Middle |
| Weight | Middle | Heavy | small | Very heavy | small | smaller |
| Dimension | small | Large | Middle | Huge | smaller | smallest |
| Noise | Silent with No Noise | Noise when Voltage regulated | Noise when Voltage regulated | Continuous Noise | Cooling Fan's Noise | Cooling Fan's Noise |
| Maintenance | Clean the dust once per 6 months | Clean the dust once per 6 months | Clean the dust once per 6 months | Complicated due to Oil | Clean the dust once per 6 months | Clean the dust once per 6 months |
| Application | All kinds load | All kinds loads | Family | Industrial | Residential Load | Residential Load |
| Install | Anywhere | Anywhere | Anywhere | Outdoor Only | Anywhere | Anywhere |
| Environmental | Clean | Clean | Clean | Polluted | Clean | Clean |
What's the difference of stable range and working range?
How to choose the capacity of the voltage stabilizer:
Principles
The voltage stabilizer and the voltage regulator are chosen according to the current:
1 Continuous working current is smaller than the rated current of the voltage stabilizer or voltage regulator, Better to have a design margin of 20%.
2 The loads start current is smaller than 5 times of rated current of the servo voltage stabilizer with the roller brush and columnar transformer. or 2.5 times the servo voltage stabilizer with a flat brush, 2 times the static voltage stabilizer.
How to choose the capacity of the voltage stabilizer:
Loads Rated current:
Single phase:
Rated current In=Pn/(Vn*cosφ)
Three phase:
Rated current In= Pn/(1.732*Vn*cosφ)
Note:
Pn — Load capacity(kW),
Vn — Rated voltage(V), Tt is Line to Line voltage in three phase system
Cosφ — Power factor.
How to choose the capacity of the voltage stabilizer:
Loads surge current:
Three phase(Motors):
1 Direct start: I(tmax)= In total + In(max)*6
2 Autotransformer start: I(tmax)= In total + In(max)*3
3 Star-Delta start: I(tmax)= In total + In(max)*3
4 Variable Frequency start: I(tmax)= In total + In(max)*2
5 Soft start: I(tmax)= In total + In(max)*3
Note:
I(tmax)— The max start current.
In total — The total rated currents of the loads
In(max)— The max starting current of the motor.
Product Tags:
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