REQUEST FOR QUOTE |
| 03-17 06:50:52 来源： 作者： |
|
REQUEST FOR QUOTE Inquiry (采购产品): REQUEST FOR QUOTE Dear Sir, We are looking the attached mentioned specified UPS as under….. SITE…..1 1; - QTY (ONE) UPS 1 X 60 KVA 2:- QTY. (THREE) UPS 2 X 120 KVA SITE……..2 1; - QTY. (ONE) UPS 1 X 60 KVA 2; - QTY (ONE) UPS 2 X 120 KVA SITE….3 1; - QTY. (ONE) 2 X 60 KVA SITE……4 1; - QTY. (TWO) 2 X 60 KVA SITE…5 QTY. (1) 2 X 60 KVA Pls quote for all accessories required for installations, without installations, spares as required for two years (see item # 16) in specifications, manual, service manual, operating manuals etc. Ur quote must reach us before 1st. October with complete brochures in color, and necessary support. I look forward Regards Sher Azam siddiqui 2x60 KVA Parallel Redundant UPS System Operating Principle:- Each double conversion UPS shall operate as defined below. 1) Normal Operation:- (Normal AC source available) The rectifier charger supplies the inverter DC current while simultaneously float the battery. 2) Operation on the battery Power:- (Normal AC source not available or outside tolerances) Upon failure or excessive deterioration of the normal AC source, the inverter shall continue to supply the load from the battery power without interruption within the limits imposed by the specified battery back up time. 3) Transfer to Bypass AC Source:- In the event of an overload exceeding system capabilities (short circuit, heavy inrush currents etc) the load shall be automatically transferred, instantaneously and without interruption, to the Bypass AC source, on the condition that bypass power available and within tolerance. 4) Maintenance on UPS Units:- For maintenance purpose, a built-in manually operated mechanical bypass system shall be installed in each UPS unit. 5) Battery Maintenance:- For safe maintenance on the battery of each UPS unit, the system shall include breaker to isolate the battery from the rectifier/charger and the inverter. 6) Cold Start (AC Power Absent) The battery of the each UPS unit shall be capable of ensuring UPS start-up even if normal AC Power is not available and continuing operation within the specified back-up time (on the condition that the system was already started with AC power present) Sizing &General Characteristics 1) Technology The UPS shall be based on IGBT technology and free frequency chopping mode. 2) Power Rating:- The UPS system shall be sized to continuously support a load 60KVA at a power factor factor (pf) of 0.8. It shall be made up of two UPS units, each with an identical rating of 60KVA. 3) Battery Backup Time:- The backup time of each battery in the event of a normal AC source outage 30 minutes. Battery service life shall be equal to 10 years. The batteries shall be selected and sized accordingly. 4) Type of Loads Accepted:- If all the connected loads are non-linear (100% non-linear loads), each UPS unit high crest factors (3:1) without derating of output. For both linear and non linear loads the total harmony voltage distortion at UPS output (THDU downstream) shall respect the following limits. 1. THDU downstream ph/N ≤ 2% for Linear loads 2. THDY downstream ph/ph ≤ 3% for non linear loads 5) Limitation of Harmonics Upstream of the UPS:- The UPS shall be draw a level of harmonic currents that could disturb the upstream AC system i.e. it shall comply with the stipulations of standard IEC 61000-3-4. To that end it shall be possible to equip the rectifier input with a filter of the type compensated LC. If necessary it shall be possible to use an electronic active filtering system to obtain, at the normal AC input, the following levels, constant from 5% to 100% load. ? Total harmonics current distortion (THDI) upstream of the rectifier charger not exceeding 5%. ? Input power factor (pf) greater than or 0.94. 6) Efficiency:- Overall Efficiency shall be greater than or equal to 0.93% at full rated load (In). 7) Noise Level:- The noise level measured as per standard ISO 3746 shall for each unit be less than 60 dBA. AC SOURCES Each UPS unit shall be designed to receive power from the following source. 1) Normal AC Source:- (Rectifier/Charger Input) The Normal AC Source supplying the UPS shall, under normal operating conditions, having the following characteristics. ? Voltage: 380 volts, ± 15% ? Number of Phase: 3 + Earth ? Frequency: 60 Hz , ± 10% 2) Bypass AC Source:- The bypass power supplying the UPS in the event of an inverter shutdown or an overload shall have the following characteristics. ? Voltage: 220/ 380 volts, ± 10% ? Number of Phase: 3 + N + Earth ? Frequency: 60 Hz , ± 10% Electrical Characteristics Output Voltage:- Voltage Unbalance: ±1% Balanced load. ±1% at 20% unbalanced load ±2% at 50% unbalanced load ±5% at 100% unbalanced load Output Frequency ? Rated Frequency: 60Hz ? Variation: ± 0.5 Hz, adjustable from ± 0.25 Hz up to ±2 Hz Overload Capacity:- Each inverter in the UPS System shall be capable of supplying for at least. W 10 minute a load representing 125% of the rated load. W 1 minutes a load representing 150% of the rated load. If the by pass AC source outside tolerances, the UPS shall operate as a generator (current limiting) with a peak capacity of 292% for 1 second to allow highly disturbed transient operating states (high overloads, very high crest factors, etc) Static By pass:- Each UPS unit shall be equipped with a static bypass. The static bypasses shall be controlled simultaneously a built-in system. Instantaneous transfer of the load from the inverter to bypass power and back shall take place without a break or disturbance in the supply of power to the load, on the condition that the bypass source voltage and frequency are within the tolerance. “Bypass AC source and that the inverter are synchronized. Mechanical Characteristics:- 1) Modular Design:- The UPS shall be of modular design so as to allow the installed power to be easily increased on site by condition of the additional UPS units either to meet new load requirements or to enhance system reliability by introducing redundancy. 2) Mechanical Structure:- The mechanical structure of each UPS unit shall be sufficiently strong and rigid to withstand handling and installation operations without risks. 3) Dimensions:- Each UPS unit shall require little floor space as possible. To facilitate installation, UPS height shall not exceed 1900 mm and passage through an 800 mm wide door shall be possible (with panels and /or doors removed as necessarily) To save considerable space it shall be possible to install the UPS units back to wall. 4) Connections and Bus-bars:- Entry upstream and downstream power cables as well as any auxiliary cables shall be possible at the bottom of the UPS or through the bottom for a false floor. Installation shall be facilitated by clear marketing of connection terminals. The UPS shall be equipped with an earth-circuit connector, compliance with the standards listed in the standard and test section. 5) Ventilation:- The UPS shall be provided with the forced-air cooling. To avoid UPS shutdown in the event of a fan failure, redundant fan shall be provided or the UPS and the fan failure shall initiate an alarm. 6) Safety:- The equipment shall meet the requirements of degree of protection index IP205, in compliance with standard IEC 60529. Environmental Conditions:- 1) UPS (not including battery) The UPS not including the battery shall be capable of operating under the following environmental conditions without loss of performance. ? Ambient temperature :- 0oC TO +40oc ? Recommended temperature range:- + 15oC to + 25oC ? Maximum average temperature: - 35oC for 24 hours. ? Maximum temperature: - 40oC for 8 hours. ? Maximum relative humidity: 95% at 25oC ? Maximum altitude:- 1 000 meters The UPS not including the battery shall be designed for storage under the following conditions. ? Ambient temperature :-20oC TO +45oc ? Maximum relative humidity: 95% at 25oC ? Maximum altitude:- 1 500 meters Battery:- The battery shall be capable of operating under the following environmental conditions without loss of performance. ? Ambient temperature :- -15oC TO +40oc ? Recommended temperature range:- + 15oC to + 25oC ? |
|
|
|
|
|
|
