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ZENERGY® ELECTRONIC LIGHTING MANAGEMENT SYSTEM The Zenergy® electronic lighting management system controls the voltage to discharge lighting loads (Fluorescent, Mercury Vapour and High Pressure Sodium) using electromagnetic induction which produces effective financial savings. OPERATION: The operation of Zenergy is based on the principal of Ohms Law. As the impedance of a lighting circuit, containing inductors, capacitors and resistors, is the ratio between the r.m.s. values of the voltage and current, by reducing the voltage the current is reduced by the same proportion. Since Zenergy® introduces a loss less impedance in the lighting circuit under control, the reduced power in the circuit in which the current is reduced, will cause a greater reduction in power consumption. This reduction can be calculated by the formula W=I 2R where W = watts, I = current and R the impedance of the circuit. The impedance R is affected by the introduction of Zenergy®. SAVINGS: Power savings are achieved through the use of the patented Zenergy® electronic control system together with custom designed autotransformer technology to lower the voltage to a predetermined level between primary winding taps. The normal voltage output is lowered to 95% (boost mode) and then to between 87.5% - 92.5% (economy mode) depending on the circumstances, which then produces a saving in power consumption of between 20% - 25% in the discharge lighting circuits. DISCHARGE LAMP TECHNOLOGY: In general, lamp manufacturers guarantee the efficiency of their products over a set voltage range between 207V - 244V. The Zenergy® electronic lighting management system is designed to operate within these parameters by initially reducing the input voltage to the discharge lighting circuit by 5% to allow for the striking of the lamp and thereafter sets the voltage to allow for different lamp operation. The Zenergy® electronic control system allows lamps to strike and operate within lamp manufacturers design parameters and does not impede the effectiveness of the lamps. The striking voltage is important because when higher striking voltages are required to insure ignition of the gases in the lamp, the electrodes will not be stressed by too low an input voltage. Once this striking process is complete, voltages may then be allowed to set within predetermined levels. Typical Fluorescent Circuit Fluorescent Lamp PF Correction Capacitor Glow Starter Ballast (choke) LAMP EFFICIENCY: Discharge lamps do not always operate at optimum efficiency. When the Zenergy® electronic control system effects the voltage changes to the light fittings, the electrical changes that occur actually improve the efficiency of the lamps. The lumen output of the lamp might be slightly less but power consumption reduces by between 20 – 30%. LAMP LIFE: Lamp manufactures confirm that lamp life is improved under lower voltage conditions and Zenergy® in active mode increases lamp life by up to 30%. COMPARISON WITH POWER FACTOR CORRECTION EQUIPMENT: Zenergy® is not Power Factor Correction although the introduction of Zenergy® in a discharge light circuit does improve the power factor. The cost effectiveness of Power Factor Correction is difficult to measure. Maximum savings are only achieved at peak demand periods. Zenergy® provides immediate savings as it is switched on and provides constant continual savings while the lighting is left on. INSTALLATION: Zenergy is installed “in-line” between the main busbars of the Distribution Board and the lighting circuits and does not interfere with other power circuits. Unit installed on concrete wall with rawl bolts or on unistrut frame on brick wall Zenergy Unit P9000 Trunking MCB Electrical Distribution Board Lighting Contactor Electrical DB Main Isolator Zenergy Unit Remote of DB MCB Zenergy Unit L T Lighting Contactor Lighting Circuits COST SAVINGS: Electricity charges per site are normally determined as follows: Metered kWh usage x rate per kWh, plus Metered kVA(kW) Demand x rate per kVA(kW), Small basic charge per site Or, plus Cost per month = (kVA x rate) + (Days x Hours x Power Factor x kVA x rate) + Basic However they are charged out, these costs form the basis on which Zenergy® claims a share of the savings in their standard rental contract. VALIDATION: Each site is assessed to determine actual power consumption and the correct Zenergy® unit size. All Zenergy® electronic lighting management systems installed on a site are commissioned and actual data validated by using test equipment to record:Voltage (Input) Amps KW KVA Power Factor These readings are then confirmed by a client representative and used to determine kVA(kW) demand savings and kWh usage for inclusion in the rental contract. SUMMARY: Zenergy reduces the power required to operate discharge lamps in lighting circuits and this is achieved by lowering voltage to predetermined levels. This in turn reduces the current and the impedance of the circuit thereby effecting significant power savings. The Zenergy lighting management system is autotransformer based and is intelligently controlled by Patented solid-state electronic circuitry. The Zenergy system automatically controls and allows for the following: 1.0 2.0 3.0 4.0 Protects the Zenergy unit against overload. Protects lighting circuits from under voltage. Controls time necessary for start up and warm up of lamps. Controls the pulse trigger to allow for seamless and smooth switching between selected voltages. The benefits derived from the installation of Zenergy are: 5.0 6.0 7.0 8.0 9.0 10.0 Reduced operating costs. Longer lamp life. Increased life of operating gear. Reduced maintenance costs. Reduced power factor on lighting circuits. Optimal operation of lamps to manufacturer’s specifications.