aVS303
The AVS303 is a Three Phase Automatic Voltage Switcher which
protects against over voltage and under voltage on any one of the
three phases as well as loss of one or more phases. indication and/or
disconnection as a result of mains frequency error of phase sequence
error is available as an option.
The VS303 incorporates a contactor to switch the full load current.
The AVS303-xx is available in different sizes ranging from 23Amps to
1250Amps (the -xx relates to the model number, ie: AVS303-23 is a 23Amp
per phase AVS303).
The options for the AVS303 are:
Frequency error (oPT/01)
Phase sequence error (oPT/02)
or both (oPT/03)
operation
make sure that your load does not exceed the rating of the AVS303.
The limits of the AVS303 are set for a window of 190-260 volts line to neutral. if a
different window is required, please refer to your dealer.
if an option board is fitted please ensure the d.i.l. switches are set correctly as
detailed in the separate instructions.
connections of the three phases from the mains (incoming cABLE) and to the
load (oUTgoing cABLE) are made to the contractor.it is essential that the incoming
nEUTrAL is connected to the terminal block.
on first switching on, there will be no output for approximately one minute while
the AVS303 monitors the mains. For that period the yellow LEd indicates that the mains are
within acceptable limits, after which the green LEd goes on and the load is connected. The red
LEd indicates that the mains is outside the window, and the load is disconnected.
Frequency and Phase Error indications, where fitted, are by separate red LEds.
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wiring
From the incoming mains:
1. connect neutral to the neutral on the terminal block
2. connect Phase 1 to where the rEd wirE is connected on the contactor
3. connect Phase 2 to where the yELLow wirE is connected on the contactor
4. connect Phase 3 to where the BLUE wirE is connected on the contactor
For the outgoing mains:
mirror the above connections.
rEd = phase 1
yELLow = phase 2
BLUE = phase 3
model AVS303
model AVS303
current (Amps)
23 to1250
nominal voltage(V)
230/400
wait time (mins)
10 secs to 10 minutes
Under-voltage disconnect(V)
190V (150 - 230V)
over-voltage disconnect(V)
260V (150 - 230V, also off)
hysteresis(V)
4
Socket type
direct via brass screw terminal
Fused plug
n/A
rFi protection
no
Transient suppression
yes >6.5kA
Spike protection(J)
160
SpeciFicationS
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