APF in hospital

Release Time : 2019.07.10

Modern commercial buildings use switch-mode power supplies

(SMPS) and uninterruptible power supply (UPS) devices, which are the main

sources of harmonic distortion, affecting the normal use of equipment in the

grid system, causing unnecessary losses to users. The active filter device

(APF) independently developed by Sanhe Power Tech(Shenzhen) Co., Ltd. can help

solve the power quality problem in this harmonic environment and greatly

improve the equipment performance. The hospital is most typical application.

Power Quality Solution for Hospital

Hospitals are places where power quality requirement is very high. A large number of harmonics will inevitably cause serious harm.

l  voltage fluctuations caused by harmonics will affect precision equipment.

l  Harmonics to image acquisition equipment

l  Harmonics to therapeutic nursing equipment

l  the power transformer heating,the power cable heating, causing safety accidents,and the losses caused are immeasurable.

Sanhe active power

filter (APF) is one for all functions module including harmonic

filtering,reactive power compensation and unbalance stabilization. It

is connected in parallel with non-linear loads, and uses one set of current

transformers (CT) to detect the load current. It calculates each order harmonic

current by FFT algorithms in its DSP microchips, and then generates a

compensating current with the same amplitude but opposite phase angles to the

detected harmonic current, which cancels out the original load harmonics.


l  Compact and reasonable structure, flexible installation.

l  Double DSP control system, using vector screening technology.

l  Dynamic filter 2 to 51th harmonics, may optionally specified harmonic filter.

l  Support your telecommunication system by Modbus R485 protocol.

l  Completely automatic function:work as harmonic filtering, power factor correction, and unbalance

stabilization at the same time.