Crown Boiler MWC Series Specifications download pdf (Page 142)

Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Units

129

xiii) Shaft grounding and

voltage monitoring

Shaft riding brushes for shaft grounding and

voltage monitoring system complete with all

software and hardware to be provided as per

manufacturer’s proven practice.

xiv) Stator winding bars

water temperature

monitoring

On line monitoring system complete with all

software and hardware and as per

manufacturer’s proven practice to be provided

to detect any abnormalities in the temperature

for individual stator bars.

xv) Rotor winding

temperature monitoring

(for static excitation

system)

Suitable arrangement as per manufacturer’s

proven practice to be provided for rotor

winding temperature measurement.

xvi) Rotor flux monitoring

Sensors for to be provided complete with all

software and hardware to detect turn to turn

shorting in field winding.

xvii) Partial discharge

monitoring

Sensors for to be provided for on-line partial

discharge (PD) monitoring complete with all

software and hardware.

xviii) Vibration monitoring

(if required)

Optical sensors (at least 6 nos.) for vibration

pickups at each end of over hang portion of the

winding to be provided.

xix) Liquid leakage detector

To be provided at all the low level points inside

the generator casing including end shields.

16.2 Generator Auxiliary Systems

16.2.1

Gas system ( for hydrogen and water cooled machines)

i) General Each generator to be provided with H

and

gas supply system including gas

manifolds, CO

heating system (if necessary),

hydrogen pressure regulator, etc.

ii) Requirement of gas

cylinders

Requirement for one start-up and one shut-

down of a unit plus those required to be

connected on manifolds of all the units plus

total requirements for 7 (seven) days

consumption of all the units to be furnished.

iii) Hydrogen driers 2x100% duty to maintain the H

inside the

machine dry with 0

C dew point at operating

pressure with provisions to prevent

condensation.

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Crown Boiler MWC Series Specifications Page 142

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