Voltage&Frequency Stabilizer/AC Power Supply

ER-50W Series Features:
1. High reliability and availability;
2. Galvanically isolated,low harmonic distortion;
3. Isolated output transformer,suit for any unbalance loads;
4. Every single phase can be used independently;
5. Thoroughly proven advanced SPWM and IGBT technology;
6. Pure sine wave,sinusoidal output;
7. Better overload capacity.

Product Details

Voltage&Frequency Stabilizer/AC Power Supply

ER-50W series Voltage&Frequency Stabilizer/AC Power Supply is utilizing the rectifying and inverting technology to convert the unsteady electricity from +/-30% variable into steady status with galvanically isolated, single phase or three phase power source.

ER-50W Series are designed to prevent the sensitive electronics/heavy duty electric equipment from damage when they are supplied under unstable state electric grid/generator, such as flicker, power drops etc. It integrates IGBT made by Mitsubishi, Siemens, and combines analogsignal controldesign together for compact sizeand higher reliability. It’s widely application in factory manufacturing, technology researching as well as home appliances.


High reliability and availability

Galvanically isolated,low harmonic distortion

Isolated output transformer,suit for any unbalance loads.

Every single phase can be used independently

Thoroughly proven advanced SPWM and IGBT technology

Pure sine wave,sinusoidal output

Better overload capacity

Display real-time data: voltage,current, frequency and power


ER-50W series power supply single units are available with the following capacities:

Single phase output:(Select one individual KVA)


3phase output: (Select one individual KVA)





1KVA to 2000KVA

Input Voltage: 1 phase


1 phase 220v+/-30%(160v-280v) or 3 phase 380v+/-30%(265v-495v) or as per your specific requirement

Frequency: 30hz-80hz

Power Factor:

≥0.8 (Standard Type)

≥0.9(12-pulse Type,option item)

Output Voltage: 1 phase 120V,1 phase 220V

Or 3x220V/380V, 3x240V/415V

Or as per your specific requirement

Frequency: 50Hz or 60Hz

Voltage Regulation: +/-1%

Frequency Regulation: +/-0.1%

Crest: 1.414+/-0.1

Distortion: clean sine wave THD<3%@Linear loads


110% 15Mins,120% shut down


Over/under voltage

Over current,Over load

Over temperature,Short circuit

Voltage difference between each phase<3V

Additional output contactor (Option item)

Display LED: Voltage, Current, frequency, Power/PF

Working condition

Temperature:-10 to 40℃

Humidity: 10-95%

Noise: < 65dB within 1 meter




Mean Time Between Failure(MTBF) 50,000H

Mean time to restoration(MTTR)< 30 min

Overall efficiency≥80%



EC 62321




1. What is your quotation condition?

If you have DHL or Fedex account ,we can quote EXW price ,otherwise CIF or FOB price.

2.Do you have any discount when procurement? 

We will quote sample price at first and we will quote volume price if you need more quantity.

3.How long is the delivery time?

For sensors,parts,modules : in stock-one week;no stock-2-4weeks; For systems,generally ,8-12 weeks.

4.How to deal with the quality problems?

If confirmation of product quality problem we can replace it freely for customer in the shortest period.

If interested in Voltage&Frequency Stabilizer/AC Power Supply, pls contact us : info@ericcointernational.com