WINDING PROTECTION IS A KEY ISSUE WHEN USING GENERATOR SETS

Generator system：

•Anti-condensation space heaters

Alternators are of course affected by this issue, essentially due to their electromechanical nature,

since they contain numerous components that can fail prematurely. In addition to the mechanical

risk there is the risk of electrical malfunction.

The primary purpose ofgenerator setsis to provide electric current quickly and autonomously, in situations

and places where the main supply has failed. As a result, they are often faced with conditions of use

that do not provide an optimum environment. Extreme temperatures, humidity, dust, etc. All these

aggressors are likely to speed up ageing of the genset and its different components. Resistance to the weather and demanding conditions of use is therefore essential to ensure the longevity of a generator set.

In practice, we can see that for low-voltage machines excluding AVRs, the main sources of breakdown are divided evenly between the different alternator components. 

DEMANDING ENVIRONMENTS

Environmental stress is usually classified according to four criteria:

•Humidity is a problem because it is an electrical conductor. It is therefore likely to encourage the development of

potential short-circuits. Moreover, moisture tends to accumulate in the bottom of the machine, where it mixes with dust

and does even more damage to the windings

Dust and other particlesconstitute another hazard, as they cause

mechanical abrasion of the varnish, which will gradually lead to a

deterioration in its performance. Since air circulation is used for cooling

inside the alternator, the presence of particles in the environment is

particularly harmful

Corrosion, especially rust due to a saline environment, is usually a factor in

the premature ageing of mechanical parts and windings. Alternators used

in coastal areas or in an unprotected marine environment are particularly

exposed to this risk. Corrosion can also cause the build-up of deposits

that may interfere with machine operation.

•In certain cases or for certain applications, generator sets can be used in environments saturated inchemicals which

pose a particularly high level of attack (acids, bases, alkali). Although this rarely happens, these situations must also be

taken into account

For low voltage machines < 500 V, using a reinforced protection system leads to a power derating of about 6%.

OVERVIEW OF PROTECTION SYSTEMS

with performance and durability levels that can satisfy a particularly demanding specification. On the largest machines which will be used intensively (LSA 49/50), the exciter stator (field) is also covered in CW1081 two-part flexible epoxy resin.

Xiamen ZTA Power System Co.,Ltd
Power system supplier-Generator sets, Lighting Tower, Reefer Genset
Add: Room C5, No. 113, Chengyi North Street, Software Park III, Torch High-tech Zone, Xiamen,China.
Email: nancy@ztapower.com | www.ztapower.com
Skype: nancy19830320
Tel/WhatsApp/Wechat: +86-1390 6008 114