Delta's NT series UPS is a high-power UPS carefully discussed by experts for large-scale users, and a number of advanced skills are selected, which can provide reliable and high-quality power supply for various data processing systems, telecommunications systems, satellite systems, network systems, medical equipment, safety and emergency escape equipment, monitoring and security systems, and various factory equipment.
Excellent paralleling characteristics have become an important feature in evaluating large UPS. Delta's NT series UPS adopts the "modified distributed logic control method", and all UPSs in the parallel system are in a completely "equal" state of control. A common synchronous phase modulation method is used. Each UPS can "intelligently" adjust the synchronous tracking of each UPS located in the parallel system to the best state (the phase difference between each unit is almost zero) and dynamically adjust the load percentage in real time to complete high-precision load sharing. The digital planning based on high-speed microprocessors (3) and the common thermal compensation operation and control make it possible for up to 8 UPSs to be directly connected without adding an external parallel card or parallel cabinet, and only using loop communication cable connection to transmit real-time signals.
The use of computer simulation to assist the analysis and planning of the heat dissipation air duct and advanced IGBT high-frequency switching sinusoidal pulse width modulation technology planning so that the heat loss, low noise, small size and long life of the UPS, together with the selection of modular planning can reduce the mean time of repair (MTTR), so that the maintenance operation is easier, through the digital planning of the microprocessor, simplify the complex imitation circuit and a lot of reduction in the number of parts, so that the system is more safe and reliable. The planning of dual backup redundant auxiliary power supply and loop communication cable strengthens the reliability of the UPS system.
The battery is an important but fragile link in the UPS system. In this regard, Delta has planned a variety of comprehensive battery management plans for the NT series UPS.
The two-stage charging feature of uniform charging and floating charge can quickly restore the capacity of the battery pack, and limit the size of the charging current by setting the battery AH together to prevent the battery from overcurrent charging.
Using microprocessor detection technology, the discharge cut-off voltage of the battery pack can be automatically adjusted according to the customer's actual load to ensure that the battery will not be "deep discharge of small current".
The charging system with automatic temperature compensation function can automatically adjust the charging voltage according to the temperature, so that the high temperature is not overcharged, and the low temperature is not undercharged. When any battery in the battery pack leaks and touches the battery box, because the battery box shell has been grounded with the equipment, it forms a current loop to the ground, and sparks and high heat occur at the leakage place, which may cause the battery shell to overheat and burn. UPS has a built-in automatic detection circuit for battery ground errors, and when a battery ground fault occurs, UPS will announce a positive warning and cut off the solenoid switch on the battery side together, which can isolate the battery to prevent risks. With the powerful monitoring software, it can also set up a regular discharge test for UPS battery safety, activate the battery, and find the fault point of the battery pack in time.
NT series UPS has super load adaptability, whether it is instantaneous load, overload, short circuit or 3-phase power unbalanced inverter, it can maintain excellent output characteristics, and do proper maintenance to prevent damage to the load and the inverter itself.
Overload Capability :
50% overload can be maintained for 1 minute
25% overload can be maintained for 10 minutes
10% overload lasts for 1 hour
Inverter short-circuit capacity: 3 times of the rated current
Dynamic regulation of output voltage: 0-100% load abrupt change less than 5
With unbalanced load: at 100% unbalanced load, the phase voltage difference is less than 1%
The voltage phase shift is less than 2 degrees
Excellent input characteristics, it is well known that many higher harmonics occur due to the use of rectifier filter loads, which makes the power grid increasingly "polluted" Delta's NT series UPS inserts a 7% inductor at the input of the rectifier to reduce the input voltage depression (Notch). 12-pulse rectifier, passive harmonic filter, automatic harmonic filter, etc. are supplied together with the input harmonic plan. The input power factor and the harmonic component of the reduced input current can be greatly improved.
Different from the monitoring method of general small UPS, NT series UPS provides its common monitoring plan.
Through the cooperation of UPSentry, Delta UPS has become a true network UPS. UPSentry can be installed in Windows 98/2000 and Windows NT operating systems. And after the power failure, the UPS discharge is at the end of the network, and all the computers equipped with UPSentry on the network are told to carry out normal shutdown procedures, no matter which of the above operating systems can operate normally.
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