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Chapter 1 Safety Information and Precaution
◆ The AC drive unit and bypass cabinet of this product are in a high-voltage hazardous area,
do not open the cabinet door when high voltage is applied.
◆ Operation of the AC drive unit or bypass cabinet must be in accordance with high voltage
operating procedures and the operator must wear insulated shoes and gloves; and the site
must be supervised by another operator.
◆ When the input mains power is switched on, the terminals of the high voltage AC drive unit
remain energised even when the universal high voltage AC drive unit is switched off, so do
not touch them.
◆ Maintenance checks on the Universal High Voltage AC drive Unit must be carried out only
after the high voltage power supply has been de-energised and it has been confirmed that
the power modules have been de-energised for 10 minutes.
◆ Do not touch any part of the cabinet if you cannot verify the presence of voltage in the
cabinet.
◆ Maintenance checks and component replacement must be carried out by trained
professionals.
◆ A non-compliant ground resistance can be dangerous and needs to be checked regularly
(weekly is recommended) for a ground resistance of less than 4Ω.
◆ When the system is shut down and maintenance is required for loads such as high-voltage
motors or fans and pumps, ensure that the circuit breakers in the front-level switchgear of
the high-voltage frequency-controlled device have obvious mechanical breakpoints and
that all isolation cutters in the bypass cabinet are in the disconnected position. When the
system is in continuous operation and maintenance is required for the standby motor or
load, safety measures should be taken on the standby motor side.
◆ Verify that the input power supply meets the requirements of the product specifications.
◆ Input and output cables to meet requirements for insulation, capacity, etc.
◆ When moving, transporting and placing the equipment, it is important that the equipment is
placed horizontally and level.
◆ When lifting the AC drive, it is strictly forbidden to use the top ring of the cabinet, and to
ensure that the lifting force of the equipment is sufficient and that the lifting and lowering
process is gentle.
◆ Do not drop (leave) foreign objects such as wires, paper, metal shavings or tools in the cabinet.
◆ Do not put into installation and operation if the components of the high voltage AC drive unit
ACH200 Series High Voltage Variable Frequency Speed Control System Operating Manual
Dangers
Warning
6
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