CG Emotron OSTO 100, Instruction Manual

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14 Safety information CG Drives & Automation 01-7513-11r0
Risk assessment is described in detail in the DIN EN ISO 12100:2013-08:
Safety of machinery – general principles for design – risk assessment and risk
reduction
. The result of the risk assessment of the machine determines the
category for safety-related control systems according to EN ISO 13849-1.
2.3.1 IGBT failure and STO – residual risk
If a drive experiences multiple power semiconductor failures (IGBT failures),
then the drive system can produce an alignment torque, which then rotates the
motor shaft by maximum “180/p” degrees, where p is equal to the pole pair
number of the connected motor. This residual risk can occur even though STO
function has been correctly activated. It shall however be noted that if it occurs
then it will be detected by the drive as a desaturation trip or fuses will blow.
2.4 Trained staff
As all machinery have residual risks to consider, only qualified/trained staff that
are aware of such residual dangers may carry out work / operate / dispose such a
machine. Qualified staff are defined as persons whom has acquired applicable
knowledge by professional training following applicable standards and
guidelines of safety engineering. IEC 60364 or CENELEC HD 384 describes
appropriate skills of staff more in detail.
• Staff shall be familiar with installation, mounting, commissioning and operating
the product.
• They should be qualified for their work.
• They can apply all applicable regulations for prevention of accidents according
to directives and laws applicable for the location of the installation.
It is of main importance that the technical documentation and in particular the
safety information is fully read, understood and observed. In addition, other
applicable legal requirements and validation regulations shall be followed at all
times.
2.5 When working on the machine
It is crucial that all work executed on the machine is performed in a safe way.
Procedure may be, but must not be limited to, the following procedure:
1. Disconnect power.
Secure that any additional auxiliary power is also disconnected.
2. Secure that the power cannot be turned on again.