Application
The Sikes' 7.5kVA-500kVA regenerative power unit detects the voltage in DC bus, and then inverts the regenerative energy back to power grid. The power unit can thus eliminate the regenerative power caused during deceleration, braking and dragging of the motors, preventing the inverter from stepping into over voltage protection and securing regular service of the motors.

Typical applications of the regenerative power unit include large-scale forging machines, elevating conveyors, salvage ships and high-scale cranes.

Specification
Power Range: 7.5kVA-500kVA
Rated Current: 75-1200A
Working DC Power Voltage: DC 620V
Output AC Power Voltage : three-phase AC 400V
Chopper Voltage: DC620V±5V
Operating Frequency: 46-60Hz
Accuracy Index: setting error less than 0.5%
Overload Capability:110% long-term,150% 1min,180% 2s
Protection Level: IP20
Protection Function: OCP, OVP, UVP, overheating protection and polarity protection
EMC: conform to GB/T 17626.4( IEC61000-4-4) 4 class EFT interference test, GB/T 17626.3( IEC61000-4-4) 4 class radiation EMF test, GB/T 17626.2( IEC61000-4-4) 4 class ESD test
Ambient Temperature: -10-60℃(not freezing)
Ambient Humidity: below 90%(not freezing)
Ambient Altitude: <1000m
Cooling Mode: forced-air cooling
Installation Method: floor type
Standards Conformed: ISO,FCC,CE

Feature
1. 32 bit high performance microprocessor chip with quick response and high-precision control is adopted by the regenerative power unit to secure safe, stable and reliable execution of the device.
2. The power unit enables the VFD to operate in four-quadrant, with a regenerative braking frequency below 40%.
3. The device returns regenerative energy back to power grid, achieving an efficiency of 97%, both adding to effectiveness and protecting the environment.
4. A optimized SPWM modulation is used to achieve high power factor, optimized output wave current and lower distortion rate.
5. The power unit prevents the system from problems such as power grid flowing back, overheating, overcurrent, out of phase, undervoltage and short circuit.
6. Heat loss accounts for less than 3% of total braking energy consumed, resulting in an improved working condition.