ESAB MultiPower 460 Pulse Manual de Instruções descarregar pdf (Página 40)

SECTION 5 MAINTENANCE

What is ESD?

A sudden transfer or discharge of static electricity from one object to another. ESD stands for Electrostatic Discharge.

How does ESD damage occur?

ESD can cause damage to sensitive electrical components, but is not dangerous to people. ESD damage occurs when an

ungrounded person or object with a static charge comes into contact with a component or assembly that is grounded. A

rapid discharge can occur, causing damage. This damage can take the form of immediate failure, but it is more likely that

system performance will be aﬀected and the component will fail prematurely.

How do we prevent ESD damage?

ESD damage can be prevented by awareness. If static electricity is prevented from building up on you or on anything at

your work station, then there cannot be any static discharges. Nonconductive materials (e.g. fabrics), or insulators (e.g.

plastics) generate and hold static charge, so you should not bring unnecessary nonconductive items into the work area.

It is obviously diﬃcult to avoid all such items, so various means are used to drain oﬀ any static discharge from persons to

prevent the risk of ESD damage. This is done by simple devices: wrist straps, connected to ground, and conductive shoes.

Other handling precautions that should also be observed are as follows:

Work surfaces, carts and containers must be conductive and grounded, use only antistatic packaging materials. Over-

all, handling of ESD--sensitive devices should be minimized to prevent damage.

Never install devices into systems with power connected to the system.

Use soldering irons with grounded tips when soldering to gate terminals.

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G. IGBT Handling and Replacement

STATIC ELECTRICITY CAN DAMAGE CIRCUIT BOARDS AND ELECTRONIC

COMPONENTS.

OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE

DEVICES.

USE PROPER STATICPROOF BAGS AND BOXES.

•

WARNING

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ESAB MultiPower 460 Pulse Manual de Instruções Página 40