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OFFLINE UPS : Uninterruptible Power Supply or UPS is an essential requirement for any enterprise. UPS has made inroads into the households worldwide also due to its immense utility and ease of use. INCREDIBLE SOLUTIONS Pvt. Ltd. is one the leading online UPS manufacturers and suppliers having pan India operations and presence. We have branches all over India due to which we have earned the distinction of being the reputed offline UPS manufacturers in India. We offer a range of online and offline UPS solutions for commercial and domestic use across the length and breadth of India. We are counted among the leading online UPS manufactures in Delhi NCR region and have created a niche market due to our impeccable service and offerings. Through our Offline UPS suppliers, you can get your choicest application at cost effective rates. One of the most convenient ways to obtain your power solution is to book the same from online UPS manufacturers. Online UPS manufactures in India offer countrywide service and you can get your power system with standard equipments and accessories by just booking your order online. Offline UPS manufacturers offer you a range of industrial equipments and accessories like surge suppressors, rectifiers, power protection solutions and chargers. Offline UPS manufacturers in Delhi ncr allow you to avail power back up and management solutions with utmost ease. Being the leading online UPS manufacturer of Delhi, you can get quality power supply equipments at market competitive rates . Offline Ups supplier in Delhi . Offline Ups supplier in Ghaziabad . Offline Ups supplier in Gurgaon Offline Ups supplier in Faridabad Offline Ups supplier in Noida
Liebert® NXC UPS Systems from 10 to 40 kVA Liebert® NXC UPS Systems from 10 to 40 kVA This specification describes the operation and functionality of a continuous-duty, transformer-free, Uninterruptible Power Supply (UPS) system, classified as VFI-SS-111 according to IEC/EN 62040-3. The UPS will automatically provide continuity of electrical power, within defined limits and without interruption, upon failure or degradation of the commercial AC source. The duration of autonomy (i.e. back up power time) in the event of network failure will be determined by the battery capacity. The UPS is CE marked in accordance with: Low Voltage Directive 2006/95/EC repealing the previous Directive 73/23/EEC (as amended by Directives 93/68/EEC). Directive 2004/108/EC relating to electromagnetic compatibility and repealing the previous Directive 89/336/EEC (as amended by Directives 91/263/EEC, 92/31/EEC, 93/68/EEC and 93/97/EEC). The UPS is designed, tested and specified in accordance with the current revision of the following standards: 2.1 Safety General and safety requirements for UPS used in operator access area: IEC/EN 62040-1:2008 incorporating requirements of IEC/EN 60950-1. 2.2 EMC and Surge Suppression Electromagnetic compatibility (EMC) requirements of IEC/EN 62040-2:2006 Immunity category C2, Emission category C2. 2.3 Performance Method of specifying the performance and test requirements: IEC/EN 62040-3. 1 Scope 2 Relevant Directives and Reference Standards 5 Liebert® NXC UPS Systems from 10 to 40 kVA the ratings and input/output The UPS includes the following operational components: • Rectifier • Battery Charger • Inverter • Static Bypass Switch • Maintenance Bypass • Internal Battery (optional) The Liebert® NXC output neutral is electrically isolated from the UPS chassis. The input and output neutral are solidly tied together; therefore the UPS will not modify the state of the upstream neutral in any operating mode. As a consequence the neutral state of the distribution downstream from the UPS is imposed by the mains and distribution. Rating (kVA) Input Output 10 kVA 380-400-415V 3 Ph + N 380-400-415V 3 Ph + N or 220-230- 240V 1 Ph + N 15 kVA 380-400-415V 3 Ph + N 380-400-415V 3 Ph + N or 220-230- 240V 1 Ph + N 20 kVA 380-400-415V 3 Ph + N 380-400-415V 3 Ph + N or 220-230- 240V 1 Ph + N 30 kVA 380-400-415V 3 Ph + N 380-400-415V 3 Ph + N 40 kVA 380-400-415V 3 Ph + N 380-400-415V 3 Ph + N Q3 Q2 Q1 Q 5 UPS output Rectifier Inverter To external battery Neutral To internal battery Removable Links Bypass Input UPS output Rectifier Inverter To external battery Neutral To internal battery Removable Links Mains Input STS UPS output Rectifier Inverter To external battery Neutral To internal battery Removable Links Mains Input STS Liebert® NXC UPS Systems from IGBT Rectifier (AC/DC Converter) The three-phase current taken from the commercial AC source is converted to a regulated DC voltage by the IGBT rectifier. In order to protect the power components within the system, each phase of the rectifier input is individually fitted with a fast-acting fuse. As the IGBT rectifier will provide DC power to the DC/AC output converter (IGBT inverter) and to the DC/ DC battery converter (booster / battery charger) when the UPS is working in “normal mode”. It will also boost the DC voltage to the correct level required by the Inverter when working in “battery mode”. 3.3.2 Total Input Harmonic Distortion (THDi) and Power Factor (PF) The extremely low current distortion injected into the mains (THDi) and the close to unity input power factor (see section 9) means that Liebert® NXC will be seen by the primary mains source and distribution as a resistive load. It will absorb only active power and the current waveform will be practically sinusoidal, thus ensuring total compatibility with any power source. To this extent the Liebert® NXC includes all of the performances offered by load active filtering devices as standard. 3.4 IGBT Battery Charger (DC/DC Converter) The IGBT DC/DC converter has the following functions: • To recharge the batteries, taking the power from the DC bus, when the primary input mains is within the given tolerances • To provide the DC power, taken from the batteries, to the IGBT output inverter if the primary mains is unavailable. 3.4.1 Charging method Initially the battery is charged at a constant current rate until the cell voltage reaches a preset value (“bulk charge” stage). At the end of the bulk charge stage, the battery will have reached almost 80% of its capacity. Following the bulk charge stage, the charger switches to the constant voltage “boost charge” stage. In this phase the battery allows the remaning capacity to be charged while the current drawn by the battery gradually reduces until it reaches the relevant preset level. The boost charge stage may be disabled if it is not compatabile with the battery type. The final charging stage reached will be the “float charge” stage. In this stage the charger maintains the battery voltage at a constant level (lower than the boost voltage), where it is safe for preserving longterm battery function/charge, while at the same time preventing selfdischarge. 3.4.2 Battery management Using advanced battery management, the Liebert® NXC series maximizes battery running time up to 50%. The main battery management features are described as follows: • To avoid battery over discharge as a result of a light load, the UPS will automatically adjust the end of discharge voltage according to the back up time • In order to ensure optimum battery charging it will be possible to automatically adjust battery float voltage as a function of ambient temperature measured by a dedicated probe • The UPS will calculate the remaining battery autonomy time during discharge • It will be possible to test the battery by performing a partial battery discharge either manually initiated or at programmable intervals. A brief discharge of the battery will be made to confirm that all the battery blocks and connecting elements are in good working order • The partial battery discharge test results are also used to determine the remaining battery life resulting from the real operating conditions such as temperature, discharge and charging cycles, as well as discharge depth • The UPS provides DC overvoltage protection: if the DC voltage exceeds the maximum value associated with its operational status, the microprocessor will automatically switch off the battery charger and initiate an uninterrupted load transfer to the static bypass line. 7 Liebert® NXC UPS Systems from 10 to 40 kVA Figure 4. End of discharge voltage in relation to discharge time. Figure 5. Input voltage in relation to output load percentage. Automatic EoD Adjustment VS Back up Time Volt/Cell 1.78 1.75 1.72 1.69 1.66 1.63 1.60 0 15 30 45 60 75 90 105 120 135 150 165 180 10 ≤ T1 ≤45 default 15 46 ≤ T2 ≤ 180 default 60 1.6 ≤ V1 ≤1.67 default 1.63 1.67 ≤ V2 ≤ 1.85 default 1.75 Minutes Input voltage (V) 105% 100% 95% 90% 85% 80% 75% 70% 65% 150 200 250 300 350 400 450 Output load 3.4.3 Operating parameters When operating with maintenance free, valve regulated lead acid batteries (VRLA), the parameters per cell will be as follows: • Nominal voltage (V) 2.0 • Float voltage selectable from 2.2 to 2.3V, default 2.27V • Boost Voltage selectable from 2.3 to 2.4V (default 2.35V) • End of discharge (EoD) voltage automatically regulated according to back up time - see Figure 4 • Shutdown imminent alarm value depends on selected EoD voltage. 3.4.4 Operations with shared battery bank Although this configuration is not recommended due to the lack of battery bank redundancy, it is possible to share a common battery bank between a maximum of two UPS connected in parallel (see section 4.5 for details of parallel systems). The automatic battery test will be effective if the parallel load is equal to or greater than 20%. 3.4.5 Operation with reduced input voltage The IGBT rectifier will be capable of supplying the battery charger with DC voltage at rated power, also if the UPS AC input voltage is below the nominal voltage specified. A further reduction of AC input voltage (within specified limits) will inhibit the battery charger but will not require the discharging of the battery. See Figure 5 for details. Output load % without switching to battery mode 8 Liebert® NXC UPS Systems from 10 to 40 kVA 3.5 DC/AC IGBT Converter (Inverter) 3.5.1 AC voltage generation From the DC voltage of the intermediate circuit, the inverter generates sinusoidal AC voltage for the user loads on the basis of three-level pulse-width-modulation (PWM). By means of the digital signal processor (DSP), the IGBT of the inverter is controlled so that DC voltage is divided into pulsed voltage packets. A low-pass filter converts the pulse-width modulated signal into sinusoidal AC voltage. No isolation transformer is needed for the inverter with great benefits in terms of energy conversion efficiency, physical size and weight of the modules. 3.5.2 Three level converter topology The three-level topology adopted for the conversion stages of the Liebert® NXC has proven to be both the most reliable and efficient. The increased reliability offered is a direct result of the three voltage switching levels which reduce the voltage stress of the UPS semiconductors, thus ensuring prolonged life of the critical components. At the same time the switching losses also decrease in proportion to the voltage switching level, resulting in a higher efficiency. 3.5.3 Voltage regulation The advanced vector control algorithm enables the real-time control of the individual phases with consequent improvement of transient responses, short circuit behaviour and synchronisms between UPS output and bypass supply in the case of distorted mains voltage. 3.5.4 Parallel operation When multiple UPS are connected in parallel powering a common load, the DSP control ensures that each UPS output current will not differ by more than 5% of the rated full load current of the UPS. 3.5.5 Overload The inverter is capable of supplying an overload current as specified in section 9.7. For greater currents or longer time duration, to prevent damage to components, the inverter will be self-protecting by means of electronic currentlimitation. The control logic will disconnect the inverter from the critical AC load without the need to clear protective devices and the critical load will be transferred to the static bypass automatically. 3.6 Electronic Static Switch (Bypass) The UPS comes complete with a Silicon Controlled Rectifier (SCR) static transfer switch rated to conduct full load current continuously in the maximum overload conditions as specified in section 9.6. The input feed of the bypass can be either the same as the rectifier or independent, provided they share the same neutral. The control logic will be managed by digital algorithms (using vector control techniques), similar to those used for the rectifier and the inverter, sensing the status of the inverter logic signals as well as operating and alarm conditions. If the bypass is within the specified synchronization window, the control logic will automatically transfer the critical AC load to the bypass source, after any of the following conditions: • Inverter overload •Output voltage abnormal • DC bus voltage abnormal • Parallel system transfer • UPS fault condition • End of discharge reached. 3.6.1 Backfeed protection When the UPS bypass input line is powered off, there is normally no dangerous voltage/current/power present on the
We are one the leading online UPS manufacturers and suppliers having pan India operations and presence. We offer a wide range of online and offline UPS solutions for commercial and domestic use across the length and breadth of India. We are counted among the leading online UPS manufactures in Delhi NCR region and have created a niche market due to our impeccable service and offering. we are authorized service provider of MNC brand in Gurgaon.
Your need to power backup electrical devices comes to a halt with Quanta SMF Battery. Competing with the emerging brands of Sealed Maintenance Batteriesacross the nation and worldwide, SMF Battery by Quanta has acquired a dominant hold to be a support for inverters. Emitting no fume or sparks, this offered range of Quanta SMF Battery is acknowledged widely for being safe and maintenance-free. Also, as compared to the traditional lead acid battery, there is no requirement of topping water for cooling operations, due to the advanced technology.
Specifications of Delta Online UPS: We are Dealer of Delta UPS In Delhi NCR... Output Voltage varies between 220Vac/230Vac±2% 45~55Hz / 55~65Hz is the AC Input Frequency Range 380 ± 5%VAC, 3 Phase is the estimated Rated Output Voltage (VAC) 409 ± 1VDC is Charge Voltage (VDC) Fully redundant configurationand designs High power factors for both input and output Seamless operations are supported at low level of Total Cost of Ownership (TCO)
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