【 Weak current College 】 high-speed passenger OCC system UPS of 】

1. preface this PDL is China's first high speed railway business mileage 115 km in length, designed speed of 300 km, is the Ministry of railways of new high-speed rail network of demonstration projects and, therefore, be regarded as critical of China's passenger railway. Delta UPS selection through layer upon layer, smoothly into the passenger control centre for the PDL communications, signal control and dispatching with power protection. Second, the requirement that the passenger in background, the passenger building has a strong demonstration effect, design departure interval to 3 minutes, in the event of an interruption of communications, scheduling, will be a direct threat to the safety of the train, resulting in security crises of the masses, and incalculable economic loss and social negative impacts. Therefore, power protection requirements are very stringent, in tender offer for UPS customers the following specific requirements: 1. Use two sets of power supply input, are required to have the ability to automatically switch. 2. UPS must have high reliability, and a 1 + 1 redundant and computer programmes. 3. the UPS remote monitoring with dynamic data features for emergency, the UPS must be able to remote emergency shutdown. 4. UPS with battery pack smart management capabilities, with leakage detection capacity-5. Reserve battery pack investment optimization, and simultaneously improve the engine room space utilization, 6. The vendor must provide comprehensive pre-sale, the post-sale service. III. programme design

Figure 1 NT-20KVA and machine single figure figure, uses the NT series national 20KVA UPS two, constitute the "1 + 1" redundant and machine, enter a two way power supply via ATS automatically switch back to UPS input. Two UPS shared two sets of batteries. 1. the only UPS design with two-channel AC input capacity and improve system reliability. Adoption of uniform maintenance bypass design for easy system maintenance. Delta NT series UPS standard dual-circuit input function, you can implement a primary input power supply circuit and bypass isolation using two different power supply systems reliability considerably. 2. the use of the "1 + 1" redundant and machine systems design, greatly increase the reliability of the UPS. Delta NT series UPS stand-alone MTBF is greater than 300000 hours stand-alone reliability than 99.99%, use of the "1 + 1" and machine than 99.999%. Delta NT series UPS, provides powerful and machine capabilities, not required and can be machine card and machine up to 8 units and machines, and can be no power capacity expansion, online meet later system expansion needs. At the same time the use of high-precision multiple-CPU digital control technology guarantees accurate and UPS parameters and is consistent with phase of strict, guarantee and machine system with load capacity and reliability. 3. the UPS systems via SNMP protocol implementation real-time data monitoring and remote networks. Delta NT series UPS support SNMP card with UPSentry software, intelligent monitoring system form. The customer through the network, on the UPS is running various parameters, event logging for real-time detection. When the UPS site emergency, through monitoring software or the stem nodes reserved EPO interface, close UPS. 4. intelligent battery management function, Delta NT series UPS with intelligent battery management capabilities, with automatic equalizing charge, float conversion feature, you can periodically on the battery to secure power detection, and also can load and automatically adjust the discharge end voltage through this function, you can greatly extend the battery life. In addition NT series UPS also has electric leakage detection function and the ability of charging automatic temperature compensation. 5. scenario two UPS sharing 2 batteries, AC OK, while the UPS to the battery, power supply is interrupted, the exception or the UPS while leveraging an inverter, battery energy to provide energy payload. Doing so can save 50% battery investment and installation space, but also reduce the load-bearing investment, in a substantial increase in battery usage. Additional battery empty open configure redundant capabilities allow system any two empty open failure does not affect the system's functioning and improve system reliability. 6. ubiquitous service purposes. CIMIC as power industry leading manufacturers in the country there are 34 several branches, with more than 200 through strict examination certification engineers, and each branch are standing with spare parts, providing customers with comprehensive pre-sales and after-sales services. 4. run analysis: when AC power is normal, UPS, inverter rectifier to load after the power supply. When the mains fails, the ATS automatic switch child railway special AC power supply circuit, from the circuit to UPS to provide energy. When commercial power supply and railway communication circuit are fault or disruption, the energy of UPS use battery, inverter output AC power supply load use, protect the smooth and safe running of the workload. Normal working hours, the UPS load-sharing system. When a parallel system of one UPS fails, the output automatically lock UPS, UPS by another power supply to the load. If the UPS load exceeds this time, the load transfer 20KVA by two UPS backup power supply, ensure that load and running. When UPS inverter exception (over-temperature, overload, short-circuit, battery discharge termination, etc.), inverter automatically lock machine, at this point if the standby power supply correctly, then load into standby circuit power state. When the inverter exceptions exclude, you will automatically be cut back to the main loop. 5. closing passenger highway is one of the important transport hub, is dedicated to provide high quality products and services, to ensure that passenger communications, signal control and dispatching of normal and stable operation of the UPS device performance is especially important. CIMIC said it would continue to provide customers with high quality products and perfect service, jointly promote the development of rail transport undertakings.