PRODUCT ADVICE SHEET
Fantech AVA series
VSD
Remote electronic speed control in fan, blower,
pump or applications where the torque varies with
speed. Load independent speed control of universal
& shaded pole motors.
Energy efficient 3-wire PSC
motor configuration. 2
separate outputs for main / auxiliary windings. Can
also be connected as simple 2-wire system.
Power Control.
Remote stepless electronic power
control of resistive loads eg - lamps & heaters.
Multiple & dissimilar loads
accommodated.
EMI Filters built in. Ctick approved
– no external
filters required.
Selectable input
0–10 VDC or 2 – 20ma control
signal with adjustable min / max levels.
Factory calibrated
for most fans or pumps.
Easy
custom
calibration
internal test source &
simple range (span & offset) adjustments.
Auto OFF at low signal levels
<0.8V / 1.5ma
Double isolation
of control signal and mains
circuitry via transformer and opto-isolation.
Range of power ratings
1200 VA - 7200 VA.
Custom applications. Specific
control parameters,
interfaces, environmental probes.
RoHS
compliant and Ctick approved.
IP65 version available
with removable base that
can be separately drilled / mounted
FEATURES
Universal Power / VSD Controllers
Part no. INST‐AVA VSD ADVICE
August 2012
SPECIFICATIONS Fantech
Model AVA Universal Power / VSD Controllers
APPLICATIONS
Speed control of most single phase PSC motors with mechanical loads such as fans, centrifugal pumps or
those applications where the torque of the load varies with speed. Can also control shaded pole and
universal motors with any type of mechanical load. Remote stepless power control of all general resistive and
inductive loads such as lamp, heating elements or transformers. Multiple & dissimilar loads can be
accommodated simply by connecting in parallel.
TECHNICAL BASIS
Phase angle control of AC mains.
B version
– single output for small PSC motors connected as 2-wire,
universal and shaded pole motors, lamps, heaters and transformers.
D version
– dual outputs for small,
medium and large PSC motors and all other types of loads that require main & auxiliary control outputs.
Standard proportional control via 0–10 V or 2-20ma DC control signal.
RATINGS
RMS continuous
Single phase 240 V AC (
+
10/
-
20%) 50 Hz. Also available for 110V 60 Hz.
AVA5.0
– 1200 VA 5A
AVA8.0
– 2000 VA 8A
AVA10.0
– 2400 VA 10A.
(other sizes also available)
Main variable output rated to full rated power and can be varied between ~20 and 100%.
Auxiliary output is zero voltage solid state switched and can be rated up to 100% rated power. Total
controlled plus auxiliary output power should not exceed 100% of maximum controller rated power.
Environmental: up to 50
o
C in free air for AVA5.0 & AVA8.0 (no de-rating required). For AVA10.0 to
AVA20.0 de-rate (max VA) 1.6% x “max VA rating” per
o
C above 30
o
C. Max case temp all models 70
o
C.
PROTECTION
Surge protection network incorporated on board for over voltage / noise spikes. Control circuit for remote
control signal operates at 12 volts DC and is totally isolated from the supply mains / load power circuit by a
double insulated fully encapsulated BS415 rated transformer and a 5000V opto coupler between control
input & power output. Generous power design parameters – controller designed for PSC motor starting and
reasonable short term overload conditions. On-board replaceable fuse in
~L
line. External DB MCB
overload / isolation protection recommended for motor load is usually adequate to protect controller.
CONTROL INPUTS
0-10 volts terminals
B
(+ve) &
C
with input resistance 1 Mohm. 2-20ma on terminals
B
(+ve) &
C
with sink
resistance = 500 ohm. An internal 10V DC source (max 50 ma) is provided between terminals
A
(+) &
C
which can be used for custom remote control applications, a remote or local potentiometer or testing.
AUTO TURN-OFF
At low control levels, the controller is designed to shut down the main control and auxiliary outputs. Normal
operation resumes at higher control levels. Auto turnoff occurs at < 0.8 VDC for voltage input, ~<5% for a
potentiometer, < 1.5 ma for 2 - 20 ma.
COMPLIANCE
Fitted with internal Electromagnetic Interference suppression network, and complies with AS/NZS CISPR
14.1:2003 when correctly installed. ACA C-Tick lev 2
N29529.
ROHS compliant.
