1. Turbine inlet valve
1.1 Guaranteed Technical Particulars
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ITEM DESIGNATION VALUE REMARKS
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1. General
i) Manufacturer
ii) Place of manufacture
iii) Type designation
2. Main data
i) Maximum leakage from main
valve when fully closed against
rated head of 143 m (with
new seal).
a) Through seal
b) Maximum leakage from bypass
valve at rated head of 143 m
ii) Maximum head loss through the
valve at a flow required for rated
turbine output at rated net head.
iii) Maximum torque required to close
the valve with a flow corresponding to
a) Rated turbine output at
rated net head.
b) Specified turbine overload
output at rated net head.
iv) Main dimensions of inlet valve
a) Inside diameter
b) Length of valve body (excluding
extension).
c) Maximum distance from
horizontal centre line of
valve to lowest portion
assembly.
v) Lowest factor of safety (referred to
design stress) for any hydraulically
loaded part of the valve.
vi Valve operating oil pressure.
a) Minimum
b) Maximum
1.2 Other technical particulars
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ITEM DESIGNATION VALUE REMARKS
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1 Head loss through the valve at a
flow required for rated turbine
output.
i) At net head of 143 m.
ii) At Gross head of 161.447 m
2 Servomotor
i) Make
ii) Nominal design oil pressure.
iii) Active volume
iv) Range of opening time.
v) Range of closing time.
3 I) Guaranteed closing time of
MIV at rated load and
rated head of 143 m.
ii) Guaranteed closing time of
MIV at over load of (110 %) and
max. head of 161.447m
iii) Guaranteed maximum
opening time at rated
head
iv) Guaranteed maximum
opening time at Max.head
4 Weight
i) Weight of complete shut off valve.
ii) Weight of complete oil pressure
unit with pump set equipment.
iii) Estimated shipping weight of
valve.
iv) Maximum weight of valve
assembly to be handled by
power house crane.
5 Dimensions
i) Minimum floor opening required
for valve installation/ removal.
a) Width
b) Length
2.0 Runner
2.1.1 Guaranteed Technical Particulars
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ITEM DESIGNATION VALUE REMARKS
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1 RUNNER
i) Runner
ii) Material
iii) No. of blades
iv) Runner diameter(throat)
v) Inlet diameter
vi) Weight
vii) Dia. at centre line of distributor (D).
viii) Blade angle at inlet & outlet.
ix) Runner labyrinth
a) Material, standard, surface
hardness (BHN).
b) Method of fixing and
removal of runner.
x) Details of hard abrasion coating on
a) Blades
b) Labyrinths.
xi) Hydraulic flow velocity in turbine.
a) Absolute at inlet.
b) Peripheral at inlet.
c) Relative at inlet.
d) Absolute at outlet.
e) Peripheral of outlet.
f) Relative at outlet.
2 Centralised grease lubrication system.
i) No. of pumps.
ii) Type and make of pump.
iii) Capacity of grease reservoir.
iv) Rating of pump.
v) Number of grease distributions.
vi) No. of point fed by grease
vii) Frequency of lubrication.
viii) Recommended type and grade of
grease.
ix) Piping material.
x) Points served by system for turbine.
xi) Make of pump motors.
xii) Grease consumption per cycle,
per week, per month (Kg.)
xiii) Rate of grease flow into turbine
greasing points during application
of grease (LPM).
3 Governing System
3. 1 Guaranteed Technical Characteristics
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Item Designation Value Remarks
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1 General
i) Manufacturer
a) Control
b) Hydraulic unit
ii) Place of manufacture
a) Control
b) Hydraulic unit
iii) Type designation
a) Control
b) Hydraulic unit
2 Main data
i) Sensitivity of governor to respond
to min. speed change of rated
speed
ii) Max. dynamic pressure for total
load rejection of all three turbines
working in parallel on 110% load
at max. net head of 143 m.
iii) Max. speed rise for total load
rejection of all three turbines
under working conditions as per
(2-ii) in percentage of rated speed
iv) Governor operating oil pressure
a) Minimum
b) Maximum
c) Rated
v) Range of adjustment of gain
control
a) Proportional gain
b) Derivative gain
c) Integral gain
vi) Type actuator & emergency
valve type
vii) Minimum wicket gate setting
a) Closing
b) Opening
3 Governor oil pumps
i) Number of main oil pumps
ii) Type of oil pumps
iii) Unit governor oil pump discharge
pressure
iv) Power rating of main pump motor
v) Power rating of jockey pump motor
vi) Type of pressure switches
4 Pressure accumulator
i) Total oil volume
ii) Design pressure
iii) Minimum possible operating cycles
of wicket gates (close -open) without
recharging tank
iv) Dimensions of tank ( H x Dia.)
5 Sump tank
i) Total oil volume
ii) Size of sump (L x W x depth )
6) Hydraulic oil
i) Total quantity of oil required for
complete system including
servomotors.
ii) Type of governor oil
7) Oil quantity
i) Oil pressure vessels
ii) Number of vessel & capacity
iii) Dimensions
iv) Normal working pressure
v) Minimum working pressure for
safe operation
vi) Number of complete operations
8 Weight of complete governor
actuator cabinet with pump set
equipment.
4.0 AVR system
4.1 Guaranteed Technical Particulars
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ITEM DESIGNATION VALUE REMARKS
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1 Manufacture
2 Place of manufacture
3 Type designations
4 Applicable standards
5 Rating of excitation system
at rated generator output and
rated power factor (hot rotor
winding)
i) field voltage
ii) field current
iii) field power
iv) No load excitation voltage
v) No load field current
vi) field flashing current and
duration.
6 Ceiling voltage in per units
of rated field voltage.
i) Ceiling voltage at no load
ii) Ceiling voltage at rated
load.
7 Field current at rated ceiling
voltage.
8 Excitation system voltage
response ratio.
9 Response time to reach 95%
of the difference between rated
ceiling voltage and full load field
voltage.
10 Time to reach +0.5% of
ceiling voltage from rated
voltage.
11 Maximum time period for
operation at ceiling voltage
power factor 0.9 and maximum
generator power.
12 Data of excitation system at
110% rated generator terminal
voltage, power factor 0.9 and
maximum generator power.
i) field voltage
ii) field current
13 Maximum continuous output
capability of excitation system.
i) maximum field current
ii) maximum field voltage
14 Maximum duration of over
excitation period
15 Time to reach 5% limit of
generator terminal voltage
in case of load rejection
16 Maximum overshoot of
generator terminal voltage
in case of load rejection.
17 Setting time to reach 0.5%
limit of generator terminal
voltage after over speed
conditions.
18 Range of voltage level setting
19 i) Range for manual control
of excitation.
ii) Frequency range of operation
iii) % transformer drop
compensation
20 Excitation transformer
i) Type
ii) Transformer continuous three
Phase power rating.
iii) Transformer voltage ratio
iv) Transformer no-load losses
(three-phase) at rated voltage,
and rated frequency.
v) Vector group/ connection.
vi) Transformer total losses
(75oC three-phase) at full
load at rated voltage and
rated frequency.
vii) No-load current at rated
voltage and frequency.
viii) Impedance voltage (75oC)
at rated frequency on 100%
rated kVA.
ix) Transformer temperature
rise after continuous operation
with rated kVA, under rated
conditions.
- winding (by resistance)
- core
x) Transformer rated voltage at
rated frequency and no-load.
a) high- voltage
b) low voltage
xi) Standard applicable
xii) Material
a) Core
b) Conductor
xiii) Class of insulation
xiv) BIL
xv) Temperature rise
21 Voltage Regulating system.
i) Make
ii) Type
iii) Accuracy of voltage regulation
iv) Range of voltage setting.
a) Auto mode
b) Manual mode
v) Voltage regulation from no
load to full load.
22 Rectifiers
i) Type of rectifiers
ii) Type of thyristor
iii) Number of thyristor per
Interchangeable module.
iv) Number of modules per
bridges of stacks.
v) Number of bridges or
stacks
vi) Number of parallel paths.
vii) Number of thyristor
a) In series
b) In parallel per path
viii) Rated current of rectifier
ix) Rated voltage of rectifier
x) Average forward current
rating per thyristor.
xi) Forward voltage drop per
thyristor
xii) Maximum safe operating
temperature.
xiii) Maximum surge current
rating.
xiv) Max. permissible duration
of surge current.
xv) Cooling fans for rectifiers
(if necessary) number of
fans.
xvi) Fan ratings.
xvii) Electrical fan motor ratings
a) Rated voltage
b) Rated power
consumption
xviii) Auxiliary transformer(s) for
cooling fans and other
a) Ratings
b) Rated primary voltage
c) Rated secondary
voltage
23 Field circuit breaker
i) Rated current
ii) Rated voltage
iii) Rated breaking current
iv) Total opening time
v) Total closing time
vi) Operating sequence
24 AC- field flashing equipment
i) Duration of flashing
ii) Power rating of field
flashing transformer.
iii) Rated voltages of transformer
a) primary side
b) secondary side
25 DC- field flashing equipment
i) Power requirements
ii) Supply voltage
5.0 Protection System
5.1 Guaranteed Technical Particulars
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ITEM DESIGNATION VALUE REMARKS
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1. / General featuresA / Protective devices
i) / Manufacturer
ii) / Whether entire system from same manufacture
iii) / Whether static type
iv) / Whether numeric type
v) / Year of commissioning of first plant with identical equipment
vi) / D.C. infeed :
a) Supply voltage
b) D.C/D.C converter included
c) Tolerances of supply Voltage
vii) / Overload protection
viii) / Short-circuit protection
ix) / Power consumption per cubicle
x) / Insulation accuracy to IEC 255-A
xi) / Indication :
a) hand reset flag
b) Light emitting diodes
xii) / Accuracy :
Time error of calibration/ repeatability
2. / Protection cubicles :
i) / Type
ii) / Protection class
iii) / Dimension (L x W x H )
iv) / Maximum weight
3. / Trip circuit supervision :
i) / Type/designation
ii) / Continuous/on command
iii) / Time delay
iv) / Fixed setting (approx.)
v) / Auxiliary elements :
Hand reset
vi) / Supervision current
Max. trip circuit supervision current
4. / Test devices :
i) / Type/designation
ii) / Provided for each assembly
B. / Relays :
1. / Differential relay :
i) / Type/designation
ii) / Current setting :
a) Differential elements
b) Differential current
c) Bias
iii) / High set over current elements :
Operating time :
- less than 3 x IN
iv) / Harmonic restraint :
- Based on second harmonic content included
v) / Relay Stability
- Through – fault
2. / Stator earth fault relay :
i) / Type/designation
ii) / Voltage setting
iii) / Time setting
3. / Over current relay :
i) / Type/designation
ii) / Setting range of time relay
iii) / Setting range of instantaneous element
iv) / Setting range of over current
v) / Setting range of instantaneous element
4. / Over voltage relay
i) / Type/designation
ii) / Setting range of the pick-up values
a) Delayed trip
b) Instantaneous trip
iii) / Time setting range
iv) / Reset ratio
5. / Under voltage relay :
i) / Type/designation
ii) / Definite time
iii) / Inverse time
iv) / Two setting levels
v) / Voltage setting :
a) Setting range
b) Start element reset at
c) Continuously variable
d) Steps
vi) / Operating time :
a) Continuously variable
b) Steps
c) Setting range
6. / Negative phase sequence relay (46)
i) / Type/designation
ii) / Adjustable pick-up value
a) First stage
b) Second stage
iii) / Tripping time-laq adjustable
a) First stage
b) Second stage
7. / Field Failure relay
i) / Type/designation
ii) / Setting range of pick-up generator
iii) / Time setting :
a) First Stage
b) Second Stage
iv) / Time integrator setting :
a) Pick-up
b) Drop-out
8. / Reverse power relay:
i) / Type/designation
ii) / Two setting ranges
iii) / Pick-up range
iv) / Pick – up 2nd range
v) / Maximum torque angle
vi) / Reset ratio
vii) / Direction reversible during operation
viii) / Operating time :
a) Continuously variable
b) Step
c) Definitive
d) 1st time setting range
e) 2nd time setting range
9. / Directional over-current & earth fault relay
i) / Type/designation
ii) / Setting range of time delay
iii) / Setting range of instantaneous element
iv) / Setting range of over current
10. / Synchro-check relay (25)
i) / Type/designation
ii) / 2 channel device
iii) / Independent check on criteria (3)
a) Voltage
b) Power
6.0 24 kV Switchgear
Guaranteed Technical Particulars
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ITEM DESIGNATION VALUE REMARKS
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A / PANELS1. / Manufacturer’s name
2. / Overall dimensions
a.) / Length in mm.
b.) / Breadth in mm.
c.) / Height in mm.
3. / Overall weight
4. / Shipping wt. Of the largest package
5. / Dynamic and static load on the floor
6. / Shipping dimension
a.) / Length in mm.
b.) / Breadth in mm.
c.) / Height in mm.
B. / CIRCUIT BREAKER
1. / Type and make of circuit breaker
2. / Place of manufacturer
3. / Standard to which circuit breakers are manufactured
4. / No. of phases
5. / Frequency
6. / Normal current capacity(Standard)
7. / Derated current capacity(site)
8. / Rated making capacity
9. / Service voltage and system
10. / Insulating media
11. / Rated power frequency insulation level to earth for one minute
12. / Rated power frequency insulation level to earth across open contacts for one minute
13. / Rupturing capacity of circuit breaker offered MVA
14. / Method of closing
15. / Method of tripping
16. / Normal voltage for operation of :-
a.) / Closing mechanism
b.) / Tripping mechanism
17. / Power at normal voltage for closing coil(Watts)
18. / Rated impulse insulation level to earth .
19. / Rated insulation level to earth across open contacts
20. / Nominal pressure/vacuum bar (if applied)
21. / Making capacity peak current KA
22. / Breaking capacity
a.) / Symmetrical KA
b.) / Asymmetrical KA
23. / Short time currents
a.) / One sec. KA
b.) / Three sec. KA
24. / Operating time from the instant trip coil received its tripping impulse to the instant at which the contacts separates.
a.) / Without current(Seconds)
b.) / For given breaking current(Seconds)
i.) / 10%
ii.) / 30%
iii.) / 60%
iv) / 100%
v.) / Short circuit
25. / Arc duration from from separation of arcing contacts to instant of arc extinction stated for breaking currents of no. of loops at :-
i.) / 10% short circuit