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Product Name:Energy Feedback Unit series NZR
Category:Frequency Inverter
 The NZR avoids wasted energy by delivering it back to your power source for use by other loads. It has easy to setup and install, safe to use, parallel usage of multiple units, realize complete current sharing. It is mainly applied in cases where rapid DEC, positioning and brake is needed eg mine hoist, elevator, textile machine, paper-making machinery, centrifugal machine, washing machine, drawbench, proportional action and crown block.

Features
Application
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Product selection instructions

* The adaptive motor power is calculated based on the grid voltage level as the benchmark, without the need to enlarge or reduce the capacity. In the occasions where the power generation efficiency of the motor is relatively high, the power level needs to be enlarged by one gear when selecting the model.

* When it is applied to permanent magnet synchronous motor(the power generation efficiency of permanent magnet synchronous motor with the same power is one level higher than that of asynchronous motor), the power level needs to be enlarged by one gear when selecting the model.

* Standard type (S series), braking torque is 110%, suitable for: centrifuge, lathe, textile machine, printing machine, sugar separation machine, industrial dehydrator, packaging machine, kowtow machine, pumping unit, rewind Machine, paper machine, spindle, gantry planer, etc. If you are unsure of your choice, please choose the heavy duty (H series) NZR sine wave energy feedback device. In the case of motor emergency stop braking (where the motor stops from high speed or heavy load braking, the motor emergency stop braking time is less than 8 seconds), the power level needs to be enlarged by one gear when selecting the model.

* Heavy-duty type (H series), braking torque is 150%, suitable for: crane, hoist, elevator, tower crane, winch, cable car, port door machine, coal shearer, down belt conveyor, winch, steel rolling machine, driving, Crane, crane, uncoiling and winding, wire drawing machine, wire drawing machine, monkey car, reel, ship lock, etc .  

* Continuous type (C series), braking torque is 220%, suitable for continuous uninterrupted feedback occasions, commonly used for dynamometer and generator grid-connected feedback.

* 25% DTC rated current refers to the rated current of the machine's feedback work in 1/4 working system. That is: in a 2min (min is minutes) period, the feedback continues to work for 0.5min and stops for 1.5min.

* 50% DTC rated current refers to the rated current for the machine's feedback work in 1/2 working system. That is: in the 2min (min is minutes) period, the feedback continues to work for 1min and stops for 1min.

* 100% DTC rated current refers to the rated current of the machine's feedback work during continuous uninterrupted operation.

* Peak current can work continuously for 3s (s is seconds).  

Spetification of Energy Feedback Unit NZR

Item Spetification
Power supply Electrical Network 3 phase 190Vac~250Vac; 280Vac~480Vac; 530Vac~790Vac
Frequency 40Hz~70Hz
Control Current control Space vector control, current & voltage THD<5% @ 100% load
Output control Intelligent predictive control of DC bus voltage
Rectifier feedback/Feedback action voltage 330Vdc (220Vac class) ±150Vdc Adjustable; 600Vdc (380Vac class) ±200Vdc adjustable; 1000Vdc (660Vac class) ±200Vdc adjustable
Fan control 43℃ turn on, 40℃ turn off or programmable control mode
Protection Overcurrent, overload, current limit, DC short circuit, DC overvoltage, DC undervoltage, overheat, grid amplitude fault, grid frequency fault, grid phase fault, AC short circuit, external EXT Terminal input fault protection, etc.
Display Mode indication Power supply, monitoring, enable operation, fault, parameter modification, rectification feedback / feedback status indication, keyboard data display, etc.
Installation conditions Installation site In the cabinet, the altitude is not more than 1000m (for every 1000m of altitude, it must be derated by 10%), no direct sunlight, no conductive dust and corrosive gas
Ambient temperature -10 ~ 40 ℃, good ventilation
environment humidity 90% RH or less (no condensation)
Vibration 0.5g or less
Air environment None dust, direct sunlight, corrosive gas, flammable gas, oil mist, steam, water, etc., do not contain too much salt
Installation method Wall-mounted, IP20
Storage environment Ambient temperature -40~70℃
environment humidity 5~95RH
Air environment No dust, direct sunlight, corrosive gas, flammable gas, oil mist, steam, water, etc., do not contain too much salt

* Standard type (S series), braking torque is 110%, suitable for: centrifuge, lathe, textile machine, printing machine, sugar separation machine, industrial dehydrator, packaging machine, kowtow machine, pumping unit, rewind Machine, paper machine, spindle, gantry planer, etc. If you are unsure of your choice, please choose the heavy duty (H series) NZR sine wave energy feedback device. In the case of motor emergency stop braking (where the motor stops from high speed or heavy load braking, the motor emergency stop braking time is less than 8 seconds), the power level needs to be enlarged by one gear when selecting the model.

* Heavy-duty type (H series), braking torque is 150%, suitable for: crane, hoist, elevator, tower crane, winch, cable car, port door machine, coal shearer, down belt conveyor, winch, steel rolling machine, driving, Crane, crane, uncoiling and winding, wire drawing machine, wire drawing machine, monkey car, reel, ship lock, etc .  

* Continuous type (C series), braking torque is 220%, suitable for continuous uninterrupted feedback occasions, commonly used for dynamometer and generator grid-connected feedback.

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