Power Guard

About Power Guard
Our concerns will only grow more serious. NERSA, the National Energy Regulator of South Africa has approved significant price increases for Eskom during the period 2010/11 to 2012/13. 
POWERGUARD is a sustainable and practical solution that will drastically improve the consumption and peak demand profile of power usage. Peak demand can be significantly reduced without affecting the daily activities.
POWERGUARD is a patented product with the following features:
Effectively manages peak demand to achieve material improvements in demand curve and load factor.
Solid state therefore extremely reliable.
Independent does not need any control mechanism to effectively operate.
Safe design and production specification adheres to relevant standards.
Easy to install, retro fitment is easy.
Virtually invisible operation will not impede daily household activities.
Competitively priced similarly priced to many products with reduced features.

Power Guard Services and Installations available from MMTech

First we ask you for at least six months electricity bills. We peruse your account and decide if we can assist in reducing your demand or not.
Should we be able to lower your demand we will do a measurement and recording of your electrical consumption and demand, to ascertain where you use peak KWH or maximum demand.
We will then estimate your saving, quote your company, and propose a direct purchase or rental option. Furthermore we will provide you with the time your savings will pay back your return on investment.
Powerguard – Peak – Demand – Controller
Introduction to Powerguard
Electricity.. the future

Our concerns will only grow more serious. NERSA, the National Energy Regulator of South Africa has approved significant price increases for Eskom during the period 2010/11 to 2012/13.

POWERGUARD is a sustainable and practical solution that will drastically improve the consumption and peak demand profile of power usage. Peak demand can be significantly reduced without affecting the daily activities.

POWERGUARD is a patented product with the following features:
Effectively manages peak demand to achieve material improvements in demand curve and load factor.
Solid state therefore extremely reliable.
Independent does not need any control mechanism to effectively operate.
Safe design and production specification adheres to relevant standards.
Easy to install, retro fitment is easy.
Virtually invisible operation will not impede daily household activities.
Competitively priced similarly priced to many products with reduced features.
POWERGUARD has a range of products for both domestic and business use. The products are automatic, efficient and assist to manage your power load. The problems surrounding the generation and supply of sufficient electrical power in South Africa has been topical for some time now.

Powerguard for your business
PEAK DEMAND CONTROL SYSTEM

Powerguard's CPM range of products was designed to service the broader commercial arena where insufficient supply as well as expensive peak demand needs to be addressed.

A commercial entity such as for example, a hotel or conference centre might be largely unused. When full however, the demand peaks and the entire rates bill is affected, by maybe only one peak.

E-mail us on info@mmtech.co.za  
Components as well as installation have to be cost effective
Adjustments and programming for non computer literate installers
High build and component quality
Power Guard product
Features:
0 - 100, 200, 500 and 1000 Amps per phase ranges available
Controls peak demands by shedding selected loads according to a random algorithm
Displays 3 currents in a three phase installation.
Displays the set target current or KVA at which shedding commences.
Can shed phase with highest load first to assist in balancing the installation
Displays shedding instructions as well as relevant phase being shed
Simple timer introduction can power up / down installations to avoid overnight cumulative peaks.
All receivers off after power outage resulting in greatly reduced cold pick-up load
All receivers have built in random generator to restore power gradually
All receivers connected by low voltage parallel two-core cable, polarity insensitive , short-circuit proof
Two-core controls signal is phase conscious and only addresses applicable units
Protects loads against over voltage
Cost effective remote logging.
Protects loads against over voltage


An installation comprises a power supply unit that plugs into a standard 3 phase outlet, a control unit that connects to three current transformers and as many receivers as is necessary to serve the loads identified to be controlled.

The controller connects to all receivers in parallel and for single phase load applications, will only address receivers connected to the transgressing phase. There is no limit to the number of receivers connected to a controller. Receivers can also be added or removed at any time without the need to interrupt power to the controller or signal to existing receivers.

Design Criteria:
Powerguard for your home
Power Guard Example
Powerguard Installation

PowerGuard is designed to be installed between the household power distribution box and up to as many appliances as required. (typically geysers, under-floor heating, air conditioning and pool pumps). The appliances can be connected into a hard-coded hierarchy specifying the relative importance of the different appliances (typically the main bathroom geyser would rank as the most important, followed by the second geyser etc.). This hierarchy will determine which appliance ranks highest for the receipt of electrical supply.

The PowerGuard is then set to a maximum load level which can be determined either in relation to average consumption or to a lower level to reduce average consumption. Once switched on, PowerGuard then constantly monitors the aggregate load of the entire household.

If, based on the load limit and Power Guard's assessment of the current household load, there is sufficient spare capacity to switch on the connected appliances, PowerGuard then follows the hierarchy in determining whether any of the 4 connected appliances require electricity.

An important feature in minimising wear and tear as well as unwanted surges and breaching drains, is that PowerGuard first determines whether the appliance requires electricity before switching it on.

Once switched on, the appliance is allowed to draw electricity. Should the appliance require electricity for only a short period (e.g. geyser already hot), PowerGuard will then test the remainder of the appliances in the hierarchy but not the most recently switched on appliance for a set period of time.

In the event of a power outage/load shed ending, PowerGuard will not automatically switch on any of the connected appliances for a set period of time to ensure that the current is stable as well as minimise significant aggregated drains on the distribution utilities' equipment.

PowerGuard also incorporates an auxiliary power source setting that allows the system to function on auxiliary power at a different load level.

What will you do when electricity quotas are introduced?

If electricity quotas are introduced, you now have the choice of controlling your power usage with the PowerGuard. 

This is how...

You can monitor power load at a given time and intervene to save power. Another option available is adding an indicator showing the average usage in KW hours, thereby fully empowering you to manage your power usage without Incurring penalties.

The contribution of all households

One of the main reasons for power cuts is the inability of the power suppliers such as municipalities to supply sufficient power during peak demand periods.
This happens because during peak demand periods there is simply not sufficient power available to supply to the consumers of electricity.

By installing the PowerGuard in each household the multiplier effect can be tremendous. We have 12m households in South Africa. If only half of those households install PowerGuard the major power suppliers can effectively manage huge amounts of power. When these suppliers effectively manage power the need for load shedding is reduced. Its simple, when the power suppliers benefit, households benefit.

Direct benefits to the average household will depend on the manner in which the PowerGuard is installed:

Should PowerGuard be installed with the maximum load set at the average consumption level, the unit will manage peak demand only and allow for a more efficient usage profile and its operation will remain virtually undetectable to the occupants in the household. Should the concept of peak demand rates or time of use rates for electricity become a reality, this would achieve significant savings in costs, without impeding the daily activities of the household.

A final benefit to households is the ability to manage both utility generated power as well as auxiliary sources. This means that, should a household invest in an auxiliary power source, the specified output of this unit can be reduced whilst achieving the same benefit. This will result in significant savings on auxiliary power units and reduce the environmental impact of a household that uses one.
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