DBW, SBW Series (AC Voltage Stabilizer)

DBW, SBW series automatic compensation voltage regulator can automatically keep the output voltage stable when the voltage fluctuation is caused by the fluctuation of grid voltage or load.

The voltage regulator has the advantages of large capacity, high efficiency, stable voltage regulation, no waveform distortion, wide application load, long-term continuous work, automatic and manual switching at will, easy to use and so on.It can be widely used in industrial, agricultural, post and telecommunications fields of large mechanical and electrical equipment and other places that need voltage stabilized power supply.

The product meets the standard of  JB /T 8749.8.


  • DBW, SBW Series (AC Voltage Stabilizer)
  • DBW, SBW Series (AC Voltage Stabilizer)
  • DBW, SBW Series (AC Voltage Stabilizer)
  • DBW, SBW Series (AC Voltage Stabilizer)

Product Detail

Guide to Selection

S (D) BW F 50 kVA
Product model Derived code Rated capacity Capacity unit
S: three phase
D: single phase
B: compensation type
W: voltage regulator
F: split mode
C: LCD type
S: bypass output
50
100
...
1800
kVA

Normal Working Conditions and Installation Conditions

The voltage regulator should be used indoors, and the normal conditions of use are as follows.
● Ambient temperature:-5°C~+ 40°C

● Altitude: altitude not exceeding 1000m

● Relative humidity: ≤90%(20°C)

● Installation environment: the installation site shall be free of gases, vapours, chemical deposits,dust, dirt and other explosive and erosive media that seriously affect the insulation of the voltage regulator

● Where the special conditions for use that do not meet the above provisions shall be determined by the user unit in consultation with our company

Product Characteristics

With boot delay function

When the voltage stabilizing state is running, press the voltage stabilizing button and adjust the voltage regulator to the steady voltage rating value (for a few seconds) before there is an output voltage supply device.

Output overvoltage protection and alarm function

In the voltage stabilizing state, when the input voltage far exceeds the input voltage range(304V~456V) or other reasons cause the output voltage of the voltage regulator to overvoltage(426V ±7V), the voltage regulator cuts off the power supply and alarms, and automatically resumes its work when the output voltage is reduced.Has the function of phase sequence protection, when the input three-phase line is wrong or broken, the protective relay can act and cut off the power supply without output.(the user needs this feature must be proposed in advance).

Main Technical Data

Product specifications and main technical indicators are shown in Table 1

Type(Table 1) Rated capacity kVA Output current A Phase number Input voltage V Output voltage V Voltage stabilization accuracy Overvoltage protection V Withstand voltage Insulation resistance MΩ Efficiency Working frequency Hz
SBW-20 20 31 three phase 304~456 380 ±3% 426±7 2000V 1min No breakdown ≥5 ≥97% 50~60
SBW-30 30 46
SBW-50 50 76
SBW-100 100 152
SBW-180 180 273
SBW-225 225 342
SBW-320 320 487
SBW-400 400 606
SBW-600 600 910
SBW-800 800 1212
SBW-1000 1000 1515
SBW-1200 1200 1818
SBW-1800 1800 2700
DBW-20 20 91 single phase 176~264 220 ±3% 246±4 2000V 1min No breakdown
DBW-30 30 137
DBW-50 50 228
DBW-100 100 455

Outline dimension( See table 2)

Model(Table 2) Outline dimension (A×B×H)mm Number of enclosures
SBW-20~50kVA 800×570×1270 1
SBW-75~100kVA 850×620×1370 1
SBW-150~200kVA 1000×700×1500 1
SBW-250kVA 1050×800×1600 1
SBW-300kVA 1100×850×1800 1
SBW-400kVA 1200×950×2050 1
SBW-500~600kVA 1100×1300×2100 1
SBW-800~1200kVA 1000×1230×2050 3
SBW-1800kVA 1200×900×1900 4
DBW-20~50kVA 800×570×1270 1
DBW-100kVA 850×620×1370 1
DBW, SBW

Instructions for Ordering

● When ordering, the product model, capacity, rated output voltage, input voltage range, voltage stablization accuracy, powerinput (output) distance and other operating conditions should be described.

● If you have any special requirements, please consult with our technical department.

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