Nidec DFS Series Power Installation Manual

DFS1/DFS2 Power Installation Guide 11Issue Number: 2Safety information Product information Mechanical installation Electrical installation Technical data1.5 Electrical hazardsThe voltages used in the drive can cause severe electrical shock and/or burns, and could be lethal.Extreme care is necessary at all times when working with or adjacent to the drive. Hazardous voltagemay be present in any of the following locations:• AC and DC supply cables and connections• Output cables and connections• Many internal parts of the drive, and external option unitsUnless otherwise indicated, control terminals are single insulated and must not be touched.The supply must be disconnected by an approved electrical isolation device before gaining access tothe electrical connections.The STOP and Safe Torque Off functions of the drive do not isolate dangerous voltages from theoutput of the drive or from any external option unit.The drive must be installed in accordance with the instructions given in this guide. Failure to observethe instructions could result in a fire hazard.1.6 Stored electrical chargeThe drive contains capacitors that remain charged to a potentially lethal voltage after the AC supplyhas been disconnected. If the drive has been energized, the AC supply must be isolated at least tenminutes before work may continue.1.7 Mechanical hazardsCareful consideration must be given to the functions of the drive or controller which might result in ahazard, either through their intended behaviour or through incorrect operation due to a fault. In anyapplication where a malfunction of the drive or its control system could lead to or allow damage, lossor injury, a risk analysis must be carried out, and where necessary, further measures taken to reducethe risk - for example, an over-speed protection device in case of failure of the speed control, or afail-safe mechanical brake in case of loss of motor braking.With the sole exception of the Safe Torque Off function, none of the drive functions must beused to ensure safety of personnel, i.e. they must not be used for safety-related functions.The Safe Torque Off function may be used in a safety-related application. The system designer isresponsible for ensuring that the complete system is safe and designed correctly according to therelevant safety standards.The design of safety-related control systems must only be done by personnel with the required trainingand experience. The Safe Torque Off function will only ensure the safety of a machine if it is correctlyincorporated into a complete safety system. The system must be subject to a risk assessment toconfirm that the residual risk of an unsafe event is at an acceptable level for the application.1.8 Access to equipmentAccess must be restricted to authorized personnel only. Safety regulations which apply at the placeof use must be complied with.1.9 Environmental limitsInstructions in this guide regarding transport, storage, installation and use of the equipment must becomplied with, including the specified environmental limits. This includes temperature, humidity,contamination, shock and vibration. Drives must not be subjected to excessive physical force.1.10 Hazardous environmentsThe equipment must not be installed in a hazardous environment (i.e. a potentially explosiveenvironment).