Industrial UPS System
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KGK SERIES RELIABLE SOLUTIONS in POWER ELECTRONICS Power Management Instruments INDUSTRIAL UPS SYSTEM PMI / GESS / KARMET GROUP COMPANIES

2 Industrial UPS System The system consists of rectifier / charger, inverter, static bypass, maintenance bypass, rectifier isolation transformer, inverter isolation transformer, bypass line isolation transformer, automatic line stabilizer, DC distribution, AC distribution, controls and monitoring. The AC output of the inverter is connected to the critical load, the storage battery is connected between the inverter input and rectifier / charger output through a battery isolation MCB. The normal AC input power is connected to the rectifier; the bypass circuit also takes power from the same...

3 Industrial UPSs are regarded as fully customized power supply systems for rugged environments and designed particularly to safeguard critical loads in industrial applications where voltage transients, created by degraded mains supply, can seriously damage both UPS and the critical load. Industrial UPS Systems are fully flexible and customizable and designed for active–on line installation between the power source, by-pass source and critical load where the inverter delivers regulated AC voltage and frequency to the load and rectifier delivers regulated DC voltage / current to the DC load...

4 INDUSTRIAL UPS SYSTEM OPERATION MODES Applications Industrial UPS Systems are primarily designed to meet requirements for the applications; • Oil and gas offshore and onshore, • Petrochemical, • Chemical, • Power- and Substations • Production process plants • Offshore installations • Pipeline control centers • Airport, avionics and airfields • Railways and metro lines • Hospitals and healthcare • Security and Alarm equipments • Defense NORMAL OPERATION The rectifier with input isolation transformer converts normal input AC power info DC for the inverter and DC loads and for charging the...

5 TYPICAL REDUNDANT AND FULLY ISOLATED DESIGN STABILIZER CONTROL PANEL RECTIFIER ISOLATION TRANSFORMER BYPASS ISOLATION TRANSFORMER STS CONTROL PANEL INPUT INPUT RECTIFIER CONTROL PANEL MANUAL BYPASS SWITCH DISTRIBUTION PANEL INVERTER ISOLATION TRANSFORMER INVERTER CONTROL PANEL RECTIFIER ISOLATION TRANSFORMER INPUT RECTIFIER CONTROL PANEL DC LOADS DC LOADS STATIC TRANSFER SWITCH Boost Inhibit Interlock Control INVERTER CONTROL PANEL INVERTER 1 INVERTER 2 RECTIFIER 1 RECTIFIER 2 INVERTER ISOLATION TRANSFORMER A v A v BATTERY BATTERY STABILIZER

6 LOAD SECURITY AGAINST MAINS FAILURE Load is fully isolated with galvanic transformer. Therefore, in circumstances where the load is likely to be affected by a very large variation in its power supply, a transformerbased UPS provides a safer and more robust solution than transformer-less technology simply because its size and construction afford some inertia between the input and output waveforms, with no additional electronic filtering required. For utmost critical applications like the ones in oil & gas or health care sectors, redundancy on the rectifier side (direct connection) and on...

7 The rectifier is SCR controlled AC/DC rectifier with input isolation transformer and with automatic constant voltage and constant current ability. It comes with 6 Pulse or 12 pulse design options depending on user requirements. The advantages of employing 12 pulse rectifier in industrial UPS systems are to have lower THDi (<10%) and higher pf at input (>0.9) as well as to secure redundancy since 12 pulse rectifiers are designed with one delta and one star connected transformers, so the unit itself behaves as two redundant rectifiers by its nature as demonstrated in graphs. On LCD panel...

8 LOW RIPPLE Soft Start Feature No inrush current at start up AC Ripple at full load < 1% Battery life is extended significantly via low ripple voltage due to low heat Microprocessor Control Fully microprocessor controlled rectifier Thyristor angle is adjusted with load change ½ Load: Phase angle shortened Full Load: Phase angle at max BATTERY CHARGING CHARACTERISTICS Ideal output characteristic via fast microprocessor control Ideal and safe charging of batteries is sustained by setting boost and float charge currents. In this way unnecessary boost conditions and deformation of batteries at...

9 With this capability rectifier can be used as a power supply even without battery safely with DC Loads Dynamic Response In sudden load changes dynamic response is 300 msec without overshoot or undershoot to secure the load Rectifier Communication Interface Rectifier Front Panel Screens hot

10 The inverter converts DC voltage into pure sinusoidal AC voltage with constant amplitude and stable frequency. The unit works with an IGBT inverter bridge with PWM (pulse width modulation) having high efficiency in the partial load range as well as achieving a low distortion factor at non linear load. Inverter output encompasses 6 IGBT modules, boosting the instant power capacity of the UPS by double fold with comparison to regular systems. This feature allows the UPS to handle higher capacity loads (inrush currents) with smaller capacity devices. In addition, switching at high frequency...

11 Dynamic Response Output at 0-100% load change Output at 100% - 0 load change In sudden load changes dynamic response recovery time is 5 msec and max. voltage change is 5% Swiching wave form Swiching at 20 kHz • There is no waveform distortion for reactive and nonlinear loads • Low audible noise Perfect output waveform with linear loads Line voltage Output waveform Perfect output waveform with non-linear loads Line voltage Output waveform Perfect output waveform with non-linear loads Perfect output waveform with linear loads

12 Inverter Communication Interface

13 STATIC TRANSFER SWITCH BLOCK The microprocessor-controlled static transfer switch constantly monitors the sources connected to the inputs; checks whether they remain within the current and frequency limits and decides if they are synchronized with each other. If the prioritized source is within the determined limits, critical load is transferred over to the prioritized source. If the prioritized source is not within the determined limits, load is then transferred to the 2nd source which is within the determined limits. When the prioritized source reverts to the determined limits, load is...