Danfoss vlt aqua, Руководство по конструкции

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2 Introduction to the VLT AQUA Drive
2.1 Safety
2.1.1 Safety note
The voltage of the adjustable frequency drive is dangerous whenever connected to line power. Incorrect installation of the motor,
adjustable frequency drive or serial communication bus may cause damage to the equipment, serious personal injury or death. Con-
sequently, the instructions in this manual, as well as national and local rules and safety regulations, must be complied with.
Safety Regulations
1. The adjustable frequency drive must be disconnected from line power if repair work is to be carried out. Make sure that the line power supply has
been disconnected and that the necessary time has passed before removing motor and line plugs.
2. The [STOP/RESET] key on the control panel of the adjustable frequency drive does not disconnect the equipment from line power and is thus not to
be used as a safety switch.
3. Correct protective grounding of the equipment must be established, the user must be protected against supply voltage, and the motor must be protected
against overload in accordance with applicable national and local regulations.
4. The ground leakage currents are higher than 3.5 mA.
5. Protection against motor overload is set by par. 1-90
Motor Thermal Protection
. If this function is desired, set par. 1-90 to data value [ETR trip] (default
value) or data value [ETR warning]. Note: The function is initialized at 1.16 x rated motor current and rated motor frequency. For the North American
market: The ETR functions provide class 20 motor overload protection in accordance with NEC.
6. Do not remove the plugs for the motor and line power supply while the adjustable frequency drive is connected to line power. Make sure that the line
power supply has been disconnected and that the necessary time has passed before removing motor and line plugs.
7. Please note that the adjustable frequency drive has more voltage inputs than L1, L2 and L3 when load sharing (linking of DC intermediate circuit) and
external 24 V DC have been installed. Make sure that all voltage inputs have been disconnected and that the necessary time has passed before commencing
repair work.
Installation at High Altitudes
At altitudes higher than 6,600 feet [2 km], please contact Danfoss regarding PELV.
Warning against Unintended Start
1. The motor can be brought to a stop by means of digital commands, bus commands, references or a local stop while the adjustable frequency drive is
connected to line power. If personal safety considerations make it necessary to ensure that no unintended start occurs, these stop functions are not
sufficient. 2. While parameters are being changed, the motor may start. Consequently, the stop key [STOP/RESET] must always be activated; following
which data can be modified. 3. A motor that has been stopped may start if faults occur in the electronics of the adjustable frequency drive, or if a temporary
overload or a fault in the supply line power or the motor connection ceases.
Warning:
Touching the electrical parts may be fatal - even after the equipment has been disconnected from line power.
Also make sure that other voltage inputs have been disconnected, such as external 24 V DC, load sharing (linkage of DC intermediate circuit), as well as
the motor connection for kinetic back-up.
Refer to
VLT ® AQUA Drive Instruction Manual MG.20.MX.YY
for further safety guidelines.
VLT
®
AQUA Drive Design Guide 2 Introduction to the VLT AQUA Drive
MG.20.N5.22 - VLT
®
is a registered Danfoss trademark
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