IMO Precision Controls Jaguar VXS, Руководство пользователя

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5.2 Power Circuits
Access to Terminals
Remove the front cover by releasing the single
captive screw near the lower edge of the
cover. Press firmly inwards on the sides of
the cover near the lower edge and lift it away.
Power terminals and control terminals are
now accessible from the front.
Power Input/Output Terminal Blocks
Power Input Circuit
It is essential that the incoming supply cir-
cuit to the inverter is properly protected
against short-circuit and earth faults.
The alternatives are a suitably-rated fused
contactor, MCB or RCD to ensure that the line
and neutral (or all three phases) are operated
simultaneously.
For ratings refer to pages 3 or 63.
Power Output Circuit
Connect a three-phase squirrel-cage motor to
the output terminals U, V, W in the correct
sequence, preferably using screened or
armoured cable. If the operational commands
FWD and REV do not match the desired
direction of motor rotation, interchange any
two of the U, V, W connections. It is not nec-
essary to change the power input connections.
The motor circuit is protected by the inverter
software against overload provided that
Functions 15 & 16 (and Functions 66 & 67 if
applicable) are correctly set. The inverter
automatically protects the power output circuit
against short circuit and earth faults.
The installation of any type of automatic or
semi-automatic switchgear in the inverter out-
put circuit is not recommended (see below)
except for changeover switching when two
motors are supplied from the one inverter.
Power Output Circuit Isolation
An isolator may be installed in the inverter
output circuit for reasons of operational safe-
ty. Auxiliary contacts (early break, late
make), should interface with the inverter con-
trol terminals. On no account should the
isolator be used to control the start/stop
operation of the motor. Consult IMO
Precision Controls Ltd if in any doubt.
11
Single phase inverters VXS40-1 to 220-1
L N P1 (+) DB U V W
L1 L2 L3 P1 (+) DB U V W
Three phase inverters, all sizes
—
Single phase inverter VXS20-1
L N P1 (+) — U V W —
CAUTION
Connect the power supply to the power ter-
minals L, N (1-phase) or L1, L2, L3 (3-
phase), NOT to the output terminals U, V,
W, or to the control terminals.
CAUTION
Do not overtighten terminal screws.
CAUTION
Do not install filter capacitors, power factor
correction capacitors, a surge absorber or
any form of automatic switchgear on the
output side of the inverter.
CAUTION
Motor thermal overload protection is desir-
able. Use either the inverter electronic
overload protection, or a motor thermistor
and thermistor relay.