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SVC Fan Speed Controlwith Frequency Converter

The function of the SVC is to provide stepless fan speed control of condensersand dry coolers

1

. The control system provides tools to reduce both unit energyconsumption and noise level.

Features Technical data Meets requirements of EMC EN 61800-3; firstenvironment restricted distribution (suitable for commercial and industrial low-voltage network) The fan speed control range is preset10…100% Integrated installation has been EMC testedand certified by SGS Fimko Ltd (an independent certification company) Test run and pre-configured at the factory Available for supplies: 3/380–480 V/50/60 Hz,3/200–240 V/50/60 Hz and limited for 3/690 V/50/60 Hz Control of one or two condenser circuits Choice of configurations:– Integrated (I) control box fitted at the condenser or cooler inlet end with weather guard (see photo)– Remote installation (R) where power box fitted at the cooler inlet end and frequency converter and by-pass located elsewhere (e.g. control room) Integration via plug-in field bus adapter orstandard RS485 interface (dependant on control system protocol) PI-control loop Control unit enclosure to protection classIP 54 (both integrated and remote installation) Suitable for free cooling use The fan motors are supplied with circuitbreakers as standard or thermo protection as option Design temperature -40 ° C...+40 ° C Remote alarm indication All fans are controlled simultaneously Option for control from an external signal Option for automatic or manual by-passin the event of a frequency converter failure
1 for units with IEC- or DIN-norm squirrel gage motor 112/2006