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Vanguards Power (Hong Kong) Limited
[Hong Kong]
803, Futura Plaza, 111 How Ming Street, Kwun Tong, Hong Kong Hong Kong
Contact name:
Phillip Campbell , Director

Vanguards Power (Hong Kong) Limited

Energy Saving

PropSava - Power Optimisation for Home

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PropSava - Power Optimisation for Home

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Hong Kong

 Model Number


 Brand Name


 Domestic and Office

220 - 240V

 7 versions available

5,12,18,23,30,40 & 60KVA

 Guaranteed 10 years

Built for 10-25years life

 Inside or Outside

IP22 inside and IP66 out

Vanguards Power (VP) is a leader in design, development and manufacture of 3rd Generation Power Optimisation Systems. VP Systems use state-of-the-art computer control to regulate and stabilise all incoming voltage into any building or site. All VP Single and 3 Phase Systems have our unique Dynamic Digital Voltage Control (DDVC) system. Output Voltage settings can be changed by the User at any time without site power interruption - which further increases energy savings, more than any other Power or Voltage Optimisation System in the World.


VP range of single and 3 Phase Power Optimisation Systems are called: PropSava and LiteSava.


Where Sites experience main over-voltage delivery, electrical equipment is overpowered; power is wasted and all electrical equipment suffers premature failure with reduced life expectancy.


Sites/buildings that use VP Power Optimisation Products will benefit from:



  • Paying less for their electricity.
  • Reduction in CO2 emissions and carbon footprint; consuming less power means less power has to be generated and therefore less CO2 emitted.
  • Reduction in Carbon Tax liability.
  • Reduction in electrical equipment breakdowns, downtime and labour costs.
  • Reduction in premature electrical equipment failure and the cost of early replacement.                



  • Choice of Automatic or Total Disconnect Product to Site By-Pass Systems.
  • Choice of External Protections System - Current or Voltage Surge Protection - which eliminates damage to site electrical equipment.
  • 7 standard Computer controlled safety systems to monitor performance & power.         
  • Solid state system eliminates mechanical wear-out rates and servicing.
  • All Products independently certified to European CE International IEC Safety standards.
  • Manufactured in ISO 9001 and 9002 factories.
  • 15 year history of manufacture.  


  Future Proof Investment & Greater Site Savings      

  • Single & 3 Phase 3rd Generation SCRV PropSava and LiteSava are fitted with DDVC which permits the User to change the Output voltage without interruption of Site power
  • With DDVC the System can be matched to the needs of any site of any age, any location.
  • Power Quality Management System - Manage power usage over LAN/WAN Network. 


Where Are the PropSava and LiteSava Used?

VP PropSava and LiteSava are increasingly used in mains over-voltage supply areas of Europe, Australasia and Africa as a method to save power and electricity costs; reducing premature failure of electrical equipment and lowering maintenance costs.


The PropSava and LiteSava is also being used in countries where there is NOT enough voltage to start electrical equipment; and therefore provides a valuable service of maintaining the operational status of key sites such as hospitals, schools, public services, essential industry and commerce in where power is of poor quality and unreliable.


Savings Using the PropSava and LiteSava

In the UK, Europe, Australasia and South Africa, PropSava units fitted have achieved average energy savings of up to 26% and an average of 13% over the last five years, making this one of the fastest-growing energy saving techniques on the market. LiteSava units have achieved up to 42% cost savings and an average of 22% over the last 5 years.


General Specifications


Regulation System:

Digital control Contactless (SCR) compensation regulation

Output KVA:

5KVA, 12KVA, 18KVA, 23KVA, 30KVA, 40KVA and 60KVA


Single Phase


All sizes are floor standing with four wheels.

Input voltage:

176V to 254V AC 50Hz/60Hz at typical 215V output voltage setting.

Output Voltage:

210 to 230V, 50Hz/60Hz subject to User setting.

Output Voltage Stabilisation:

≤±1.3% - subject to 0 (zero) V between Negative & Earth



Wave distortion:


Response time (for measuring, calculating and implementing voltage change):   

≤20ms (milliseconds)

Display and Control Panel:

One Display screen with LED User programmable values.

LED indicators:

1. Mains power ON

2. Regulation OFF - Auto and Manual

Mute switch:

Buzzer with mute button when Auto or Manual Regulation OFF activated.

Life Expectancy:

10 up to 20 years subject to 10 year service intervals

Data Transfer System:

Optional BJ45, USB or Wireless LAN.


Cooling by convection and thermostatically controlled fans. Please ensure that the site room is adequately vented for 3 complete room air changes per hour.

Working temperature:


Ambient temperature:

-150C to 400C


0~95% (Not condensing).

Case Ingress Standard:


Casing colour:

Satin Black, Hammered Finish.

Cable location:

Incoming and outgoing cable connections from top and top/rear of casing.

Safety Systems:


1.  Over-voltage

(Hardware & Software):

2.  Under-voltage

 (Hardware & Software):

3.  Overload

(Hardware & Software):

4.  Surge Protection

 (Current & Voltage):

5.  Auto Regulation OFF


1. OVP (Over Voltage Protection): If output voltage is above 240V (or at User Setting) maximum for 10 seconds the system will activate automatically By-Pass and activates the alarm

2. UVP (Under voltage Protection): If output voltage is under 195V (or under User Setting) for 10 seconds the system will automatically enter by-pass state and activate the alarm.

3. OLP (Over Load Protection): If output current exceeds 95% (or at User Setting) of maximum rated current for 20 seconds, then system will automatically enter By-Pass state and activate the alarm.

4. Optional Extra - Current or Voltage 20KA, 30KA, 25KV or 40KV.

5. In the event of any internal fault with SCR, Protection fuse, or external fault such as over/under voltage, over load etc. the system will activate Auto Regulation OFF with audible alarm (buzzer). 

Safety Testing Standards for CE:

EN61000-6-1:2007 and EN61000-6-3:2007 and EN61000-3-2:2006 and

61000-3-3:1995+A1:2001+A2:2005 and EN61558-2-12:2001

Safety Testing Standards for IEC:

IEC 61558-1:2005 IEC 61558-2-12:2001 IEC 61000-6-1:2005;

IEC 61000-6-3:2006, IEC 61000-3-2:2009; IEC 61000-3-3:2008

















































  Price Condition

FOB   Shenzhen


1 piece per case

  Package Size

48 x 30 x 495   Centimeters

  Package Weight

42   Kilograms

  Delivery lead time

20 - 25 days

  Minimum order


  Supply ability

1000 unit/month

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