BENSHAW RSi SG Series, Инструкция по эксплуатации

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Chapter 3 - Installation
3-9
3.2.2 Wiring Input and Output Power Terminals
General Power Wiring Precautions
1) The internal circuits of the drive will be damaged if the incoming power is connected and applied to the
output terminals (U, V, W). If a drive bypass contactor is used, extreme care must be taken so that input
voltage is never applied to the output terminals. An electrical or mechanical interlock of MC1 and MC2 is
required for Inverter Bypass Operation.
2) Use ring terminals with insulated caps when wiring the input power and motor wiring.
3) Do not leave wire fragments inside the drive. Wire fragments can cause drive faults, short circuits, and other
malfunctions.
4) Motor torque may drop when operating at low frequencies and with a long wire run between drive and
motor.
5) The cable length between inverter and motor should be less than 100 feet. Due to increased leakage
capacitance between cables, overcurrent protective feature may operate or equipment connected to the output
side may malfunction. If cable length between drive and motor is greater than 100 ft. see Motor Lead Length
Specifications in this section.
6) The main power circuit of the drive may produce high frequency noise, and can hinder communication
equipment near the drive. Do not run control wires in the same conduit or raceway with power wiring. To
reduce noise, install line noise filters on the input and or output side of the drive.
7) Power wiring to the motor must have the maximum possible separation from all other power wiring. Do not
run output wires in the same conduit as other wiring.
8) Cross wires at right angles whenever power and control wiring cross.
9) Do not use power factor capacitor, surge arrestors, or RFI filters on the output side of the drive. Doing so
may damage the drive or the added components.
10) The input phase voltages must be balanced within 2%. Large input phase voltage imbalances can cause
significantly imbalanced input currents that can result in excessive heating of the input diodes and the DC bus
capacitors.
11) Always check whether the LCD keypad is off and the charge lamp for the power terminal is OFF before
wiring terminals. The DC bus capacitors may hold high-voltage even after the power is disconnected. Use
caution to prevent the possibility of personal injury.
Grounding
1) The power source must be grounded.
DO NOT USE AN UNGROUNDED
source of supply.
2)
DO NOT CONNECT THE DRIVE
to a Corner Grounded Delta source of supply.
3) The drive contains high power and high frequency switching devices, leakage current may flow between
the drive and ground. Ground the drive to avoid electrical shock.
4) Connect only to the dedicated ground terminal of the drive. Do not use the case or the chassis screw for
grounding.
5) If multiple drives are installed near each other, each must be connected to ground directly. Take care not to
form a ground loop between the drives and the grounding location.
6) The protective earth conductor must be the first one in being connected and the last one in being
disconnected.
7) The grounding wire shall comply with all local regulations. As a minimum, the grounding wire should
meet the specifications listed below. The grounding wire should be as short as possible and should be
connected to a ground point as near as possible to the drive.