Supply, Erection, Testing and Commissioning of Static Excitation System with Digital Automatic Voltage Regulator (DAVR) and Associated Equipment, Including Dismantling of Existing Panels, for 2 Units of 2X50 MW Supa Power House.

GUARANTEED TECHNICAL PARTICULARS FOR STATIC EXCITATION EQUIPMENT

Sl No. DETAILS Guaranteed technical Particulars to be furnished by the Bidder

I STATIC EXCITATION EQUIPMENT

a Overall Dimension in mm.

(length x breadth x height)

1. Regulation panel

2. Thyristor panel

4. Field flashing Panel

b Degree of protection

1. Regulation panel

2. Thyristor panel

4. Field flashing Panel

c Thickness of sheet steel

1. front and rear

2. sides and top

d Power cable exit from the cubicle (Top/Bottom)

e control cable exit from the cubicle (Top/Bottom)

f Material and thickness of gland plate

g Lables for each equipment (yes/No)

h Whether Following accessories provided

1. space heater (Yes/No)

2. lighting fixture (Yes/No)

3. plug point (Yes/No)

4. Earthing Bus bar (Yes/No)

i Weight of panel

1. Regulation panel in Kgs.

2. Thyristor panel in Kgs.

3. FCB panel in Kgs.

4. Field flashing Panel in Kgs

II EXCITER (THYRISTOR CONVERTOR)

b Rated exciter output voltage in volts

(corresponding to generator rated output)

c Rated DC output in Amps

d Maximum continuous DC output rating in Amps

e Short time rating in Amps (specify time)

f Ceiling voltage in Volts

g Ceiling current and duration (Amps/Sec)

h Ability of the excitation system to operate under all conditions of duty cycle

I Type of converter

j No. of converters

k Rating of each converter bridge

l Power for the excitation equipment

1. Required supply voltage in Volts

2. No. of phases

3. Rated frequency in Hz

m Type and make of Thyristor

n Rated PIV of thyristor

o Rated current of thyristor

p Maximum current rating of thyristor

q Thyristor element cooling method

1.Natural/Forced

2. No of Cubicle fans/Bridge

3. Rating of Cubicle fans (KW,A,V)

4. Monitoring of air flow

a. Air Flow sensors or Junction Temperature

b. Make & Type of air flow sensor

r No. of bridges per cubicle

s No. of thyristors per converter bridge

t Thyristor junction temperature at rated current

u Whether each thyristor bridge is provided with Main and standby fans

v Thyristor fuses:

a.Rating: type & and make

b. No of fuses /Thyristor

c. Whether fuses are supervised

w Maxiumum ripple content at rated current

x Whether supply Change over links provided for connecting Test transformer.

3.Details of Micro Switch Provided

4.Type of switch as ON Load or OFF Load

3.Details of Micro Switch Provided

4.Type of switch as ON Load or OFF Load

III FIELD FLASHING

b AC field flashing details

1) Required power source

2) Rating of transformer used in KVA

3) Details of Diode Bridge

c DC field flashing details

1) Required power source

2) Ratings of diodes used

d DC Out put voltage in Volts.

IV AUTOMATIC/ DIGITAL VOLTAGE REGULATOR

b No of channels Provided

c Whether Auto/manual mode of operation possible in both the channels

d Whether each CPU (AUTO / MANUAL- Channel 1 and 2) shall be able to control all the thyristor bridges (thyristor converter).

e Range of voltage setting in %

f Response time

g Excitation response ratio

h Operating frequency range

j Steady state accuracy

k Limiters provided ( List to be furnished separately)

l Alarms provided ( List to be furnished separately)

m Protections provided ( List to be furnished separately)

n Provision for PSS module/scheme

o Whether redundancy in power supply

p No of Input And Output Modules

q Type of Input/Out put

I Total No. of Binary Inputs and Outputs

Whether Binary inputs provided for:

1. Field breaker/ Excitation Open & Close.

2. Selection of Auto/manual mode

3. Selection of channel in operation

4. MVAR Regulator On/Off.

5. Set Point Raise/Lower

6. MVAR raise/lower

7. Master trip relay healthy

8. Unit lock out relay operated

9. Generator Off line & On line.

10.Speed interlock

11. Auto synchronising

12. AC/DC isolator open

13. Loss of Cooling/Junction temp high

14. AVR in test

15. Other inputs

16. Thyristor Fuse Fail

17. PSS ON and OFF

18. Over excitation Limitor in action

19. Under excitation Limitor in action

Whether Binary outputs provided for:

1. Loss of converter

3.Warning alarms

4. Auto to Manual mode change over

5.Channel Changeover

6. Limiters in action

7.Status indications for Field breaker.

8. Status indications for Excitation.

9. Status indication for channel selection

10. Status indication for mode selection

11. Status indication for MVAR mode selection.

12.Other out puts (Details to be furnished)

II Total No. of Analog Inputs And Outputs

Whether provision of taking following

Analog inputs provided :

1. Generator Voltage from PT's (110V ) for all

the three phases

2. Generator current from CT's ( 5A and 1A) for all the

3. Other inputs (Details to be furnished)

4. Excitation Transformer CT secondary current.

Whether Analog outputs provided for:

1.Field current, if yes signal range

2.Field voltage, if yes signal range

3.Rotor Temperature, if yes signal range

4.Other Outputs (Details to be furnished)

(Write up of each module to be furnished

o Local MMI (Micro Terminal) and other Details:

1.Display and no. of characters

2.Parameters Displayed

3.Whether all settings can be viewed & modified

4.Whether Self Diagnostic Feature Provided

p POWER SUPPLY TO REGULATOR:

1. Rating & No. of Power Supply Modiles (DC-DC)

2. Rating & no. of Power Supply Modules(AC-DC)

3.Whether separate power supplies are

provided for each channel

4. type of source: separate or integrated type

V DETAILS OF FIELD CIRCUIT BREAKER

c Rated voltage

d Rated current

e Rated short time current for 0.2sec

f Rated breaking capacity at rated short time voltage

g Rated maximum breaking current

h Rated breaking current at rated max.breaking voltage

I Rated number of operations

l Field discharge resistor rating (KW, Amps,Ohms to be specified)

m Close & trip coil voltage

n whether manual closing is provided

o Whether Polarity change over links provided

p Opening time of Discharge contact

q No of NO and NC contacts.

r FCB Trip coil monitoring

s Whether FCB having two main contacts and one discharge contact with arc chutes is provided

VI REQUIRED POWER SOURCE

b Field flashing

c Lighting & testing Regulation panel

d Thyristor cooling

VII DETAILS OF ROTOR TEMPERATURE MEASUREMENT

1 Whether rotor temperature measurement is a part of soft ware or separate maths module provided

2 Signal range for inputs

a. Field voltage

b. Field current

3 Out put Signal range

4 No of output signals

VIII DETAILS OF ROTOR OVER VOLTAGE PROTECTION:

2 No. & rating of thyristers used

3 Pickup over voltage

4 No. of output contracts provided

IX DETAILS OF EXCITATION TRANSFORMER PROTECTION:

I OVER TEMPERATURE:

1 Details of temperature protection relay

i) Warning set temperature

ii)Trip set temperature

iii) Details of display unit.

iv) Type of Thermistors and RTDs

II OVER CURRENT:

OVER CURRENT RELAY

iii)Delayed Setting

iv) Instantaneous setting

X DETAILS OF MCB'S, TIMERS,AUXILIARY CONTACTORS AND RELAYS

A Miniature Circuit Breaker:

1. Make and rating

2. Quantity used

1. Make and rating

2. Quantity used.

C Auxiliary relays:

1. Make and rating

2. Quantity used.

D Auxiliary Contactors

1. Make and rating

2. Quantity used

XI Details of Networking system

1 Make and type of the Ethernet switches

2 Details of Optical fibre cable

3 Details of application software proposed for server PC

4 Details of application software proposed for engineer's laptop

5 Details of any other accessories proposed for networking.

Seal & Signature of the Bidder