English to Dutch Tech/Engineering Mechanics / Mech Engineering steam turbine

4.3.3 STARTING OF A WARMED-UP TURBINE
with standstills longer than 12 hours up to cold turbine (i.e. the turbine flange temperature inside  100°C)
• The main isolating valve and its bypass in the live steam line is closed.
• The vacuum is cancelled. (Cancel first the vacuum, then stop the seal steam)
• The gland steam fan is switched off, steam to the glands closed.
• The cooling water to generator air-cooler can be THROTTLED.
• The oil unit remains in full operation until the turbine is cooled down:
• The turning gear is in permanent operation until the turbine is cooled down.
In case of turning gear failure see Section 4.5.4.
• The direct drains remain closed and will be open shortly before the next start up.
Take care that no steam would get into the turbine during standstill (danger of corrosion)!
• Starting should be carried out in accordance with Section 4.1 and 4.2 respecting the corresponding start-up graphs. Preheating of control valve chest is necessary.

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