VLT ® 2000 Series Safety rules I The frequency converter contains dangerous voltages when connected to the mains. Improper connection of the motor or the frequency converter may cause equipment failure, serious injury or death. I Warning against improper start 1. The motor can be stopped using digital commands, bus commands, references or local stop, while the frequency converter is connected to the mains. If personal safety requires elimination of any possibility of unintended start, these stops will not be sufficient. 2. The motor can start during parameter operation. Therefore always activate the “Stop/Reset” key before changiing data. 3.
A stopped motor can start if a fault occurs in the electronics of the frequency converter or after a temporary overload, mains fault or faulty motor connection. Therefore follow the directions in this manual, as well as local and national safety rules. Touching the electrical parts, even when the power supply has been switched off, can cause serious injury or death. Wait at least 4 minutes after switching off before touching any electrical parts. I I These rules concern your safety 1. When repairs are undertaken the power supply to the frequency converter must be disconnected. 2.
The “Stop/Reset” key on the keyboard of the frequency converter does not disconnect the power supply and may therefore not be used as a safety switch. 3. The unit must be properly grounded, the user must be protected against supply voltage and the motor against overload according to national and local codes. 4. The leakage currents to ground are higher than 3 mA. 5. The factory setting does not incorporate protection against motor overload. For this function parameter 315 is set to data value Trip [2] or data value Warning [1]. Note: This function is initialised at 1.16 x rated motor current and rated motor frequency (see page 63). 6.
Do not remove the motor and mains terminals, when the unit is connected to the mains. Ensure that the power supply has been switched off, before you remove the motor and mains terminals. For the North American market CAUTION: It is the responsibility of the user or person installing the drive to provide proper grounding and branch circuit protection for incoming power and motor overload according to National Electrical Codes (NEC) and local codes.
The Electronic Thermal Relay (ETR) in UL listed VLTs provides class 20 motor overload protection in accordance with NEC in single motor applications, when parameter 315 is set to Trip [2] and parameter 107 is set to nominal motor (nameplate) current. 4 MG.20.B6.02 – VLT is a registered Danfoss trademark