The advantage of decentralized bypass is that bypass redundancy is claimed, the centralized bypass is considered to be a single fault point.
(1)From the point of view of type selection
From the point of view of device selection, the modular UPS system reliability of single high power SCR is much higher than small devices consisting of a centralized bypass, which function module is simple, only need to consider the influence of the device and a few peripheral driving circuit, while the decentralized bypass is distributed in the power module, but also affected by many internal device module. Engineers who have experience in maintenance all know that, faults of rectifier and inverter circuit are likely to be caused by other parts of the circuit because of sparks and spatter, that is to say the static bypass facing more uncertainty risk. If the bypass is a single fault, the bypass may be referred to as a multiple point fault.
(2)From the point of view of system capacity
From the point of view of system capacity, the capacity of centralized bypass is designed according to the cabinet, irrespective of the number of modules configured. The static bypass capacity of the decentralized bypass is determined by the module capacity, that is, when the module fails, the system will lose the corresponding static bypass capacity. The same condition is not a problem for centralized bypass. Because of the advantages of the capacity and even the ability of some manufacturers to provide 125% long-term overload, the centralized bypass module has absolute guarantee for system reliability.
(3)Reliability design analysis of centralized bypass
The reliability design of centralized bypass, many manufacturers have put forward many solutions to enhance the reliability, such as redundancy control circuit scheme, redundant communication bus scheme, power module and control module bypass decoupling scheme, power module in the bypass control scheme, the solution of each of the manufacturers have their own characteristics, can greatly to enhance the usability of the system, plus the common hot swappable bypass module design, maintenance and upgrade is as simple as the power module.
SOROTEC MPS9335 30-150KVA Modular UPS
1.Superior energy saving and environment-friendly: Efficiency > 96% at 50%-75% rated load, and > 95% at 25% rated load; Input PF > 0.99,input THDi<3%.
2.Superior capability of powering load: Output PF is 0.9 or 1, no need of power deration with load of leading or lagging PF.
3.Easy-to-install: Top or bottom cabling, no need of input cabling cabinet.
4.Easy-to-maintain: Full front access, UPS, failed part can be replaced shortly.
5.Easy-to-modify: The number of battery cells can be configured flexibly, so the original batteries can be used when modifying the legacy system; moreover, the battery cell can be replaced in time when it fails without interrupting the normal operation of UPS.
6.6-inch extra large LCD that can display 12 language (Chinese ,English ,Russian, French ,Spanlish and so on).
7.Provide large LCD touch screen (optional).
8.Each UPS modules provide 4.5KW charge capacity. equivalent to 10 to 12A.
9.On-Line Double Conversion, fully isolating the influences of power grid pollution and power failure from utility power supply and diesel generator to load.
10.Advanced DSP full digital control technologies realize higher system stability, online capacity expansion and maintenance.
11.Advanced distributed active parallel technology realizes parallel operation of 4 UPS units and online capacity expansion without centralized bypass cabinet.
12.Digital load sharing technology features extra low cross current and extreme high system reliability in parallel operation.
13.Adaptive to severe power grid environment due to extra wide input voltage and frequency ranges.
14.Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety at limit conditions.
15.Intelligent battery management maintains battery automatically to prolong the battery life.
16.Efficient heat dissipation and effective protection under severe environment due to its independent layer-sealed ventilation.
channel and redundant fan design, as well as the paint-protected circuit boards and built-in dust filter.
17.Applicable voltage south America.
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