design basis report.pdf
TRANSCRIPT
-
8/9/2019 Design basis report.pdf
1/27
MM // ss .. SS HH R R EE EE CCEEMMEENN TT SS LLII MM II TT EE DD
11 XX22 33 .. 55 MM WW CCEE MM EE NN TT PP LLAANN TT WW HH R R PP OO WW EE R R
PP LLAANN TT AATT R R AASS ,, R R AAJJ AASS TT HH AANN ..
DD EE SS II GG NN BB AASS II SS R R EEPP OO R R TT
(ELECTRICAL)
DOC NO: DALIANEAST-CCE-20006-DBR-XXX-800
JULY 2013
EE PP CC CCOO NN TTR R AACCTT OO R R
M/s. DALIAN EAST NEW ENERGY DEVELOPMENT CO., LTD.
DALIAN, CHINA .
EENN GG II NN EE EER R II NN GG CCOO NN SS UU LLTT AANN TT
CETHAR CONSULTING ENGINEERS LIMITED .
( 100% Owned by TRACTEBEL Engineering Pvt. Ltd)No.672/476, Ground FLOOR, TEMPLE TOWER
NANDANAM, CHENNAI- 600 035,INDIA.
-
8/9/2019 Design basis report.pdf
2/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
2 of 27
DALIANEAST-CCE-20006-DBR-XXX-800 /REV 00
26.07.13 00 C.Sudarmathi P.Manivannan S.Manivel
Document No. IssueDateRevNo. Prepared By Reviewed By Approved By
-
8/9/2019 Design basis report.pdf
3/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
3 of 27
1.00.00. INTRODUCTION
This Design basis report covers the features of Electrical system/
equipment and design philosophy to be adopted for 1 x 23.5MW WHRB
Power Plant at Shree Cement Limited, Ras, and Pali District- Rajasthan
State. Detail engineering works would be carried out in accordance with
the concepts developed in this report. This report covers the major
features and design philosophy proposed to be adopted for the following Power Generation System and Evacuation (Via Tie feeder) Generator
AVR Panel LAVT Panel NGR Panel Generator relay and control panel Synchronizing Panel segregated phase bus duct 11kV Switchgear Auxiliary distribution transformers Non- segregated phase bus duct
LT PCC / MCC / APFC/DBs DC System Cabling system Plant lighting system Plant earthing and Lightning protection system
2.00.00. PROJECT SITE DATA:
Location : BangurCity, RAS Pali District,Rajasthan
Altitude : 378.0 m above MSLAmbient air temperature : (Dry)
- Minimum: 9C
- Maximum: 48C
Design temperature for : 50C electrical equipment
Design relative humidity : 40%
Basic wind velocity : 4.7 m/s
-
8/9/2019 Design basis report.pdf
4/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
4 of 27
Average annual rain fall : 368.34 mm
Seismic zone : Zone III
3.00.00. CODES & STANDARDS
All the electrical equipment and materials shall generally conform to
Indian Standards and CBIP recommendations for power station design.
Statutory guidelines of the following will also be observed in
implementation of Power plant.
Indian Factories act Indian Electricity Act Indian Electricity rules TAC (Fire protection) Regulations for electrical equipment Indian Standard Code. CBIP Recommendations. IEC. IEEE.
3.01.00. Standards in below to be followed for the Respective equipment asper contract.
Transformer : IS 2026 Circuit Breaker : IEC - 56 / IS 13118 LT Switchgear : IS 4237 / IS 4047 LT Cables : IS 1554 / IS 7098 Part I Current Transformer : IS 2705 Potential Transformer : IS 3156
Earthing : IS 3043 Lightning Protection : IS 2309 Motors : IS 325 / IS 4029 Insulation Rubber mates : IS15652-2006
-
8/9/2019 Design basis report.pdf
5/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
5 of 27
4.00.00. DESIGN CONSIDERATIONS
The Electrical system will be designed based on the requirements for the
safe, reliable performance, easy operation and maintenance of all
equipments covered in this report and the associated electrical system.
4.01.00. Basic Design Basis Data:
Proposed Capacity : 23.5 MW Configuration & rating : 1 x 23.5 MW
System Frequency : 50 Hz 5% Generation voltage : 11kV CPP Auxiliary Voltage : 11000V & 415V ( 10% ) DC System Voltage : 110V Control Supply Voltage : 110 V 10% for AC,
110 V, - 15% for DC Design Max. ambient temp : 50 deg C Design life : At least 30 years Periodic maintenance interval: Greater than 4 years
Environment : Tropical,dusty,chemical,laden,atmosphere
VFD selection : VFD power selection shall be
considered after derating at
max. ambient temp
4.01.01. Following fault levels will be considered for design of all electrical
equipment at various voltage levels. Fault levels shall be restricted
to the same.
System Fault Level Duration
11 KV System 40KA 1 seconds
415 V System 50KA 1 seconds
110 V DC System 10 KA 1 seconds
-
8/9/2019 Design basis report.pdf
6/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
6 of 27
4.01.02. The system details at various utilization equipment voltages will
be as given below
S.No. Service Voltage PhaseSystem Neutral
Earthing
01. Generation 11 KV AC, 3Ph Low Resistance
02.HV
Distribution11 KV AC, 3Ph
Non Effectively
Earthed
04. LV Panels 415V AC, 3Ph
Solidly earth at
transformer starpoint
05. LV Motors 415V AC, 3Ph Earthed
06.
Lighting /
Space
heater
Circuits
230V AC,1Ph&N Earthed
07. UPS 230V AC, 1Ph&N Earthed
08. DC System 110V DC DC (2 Wires) Unearthed
4.01.03. The system details at various utilization equipment
Auxiliary/Control voltages will be as given below
Sl.
No.Service Voltage Remarks
01. Control Voltage(HT Panel)
110V DC Protection, Breaker controland indication
02.Aux. Voltage
(HT Panel)230 V UPS Metering
03.Control Voltage
(PCC)
110V DC /
AC
Protection, Breaker control
and indication
-
8/9/2019 Design basis report.pdf
7/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
7 of 27
04.Aux. Voltage
(PCC)110 V AC Metering
05.Control Voltage
(MCC)230V AC
Breaker control and its
indication
06.Aux. Voltage
(MCC)
110V AC (2
Wire)
Feeder Control and its
indication
07.Aux.Voltage
(MCC)
240 V
AC (2 Wire)
Space heater/cubicle lamp,
etc.
5.00.00. System Configuration
5.01.00. Power Generation & Evacuation
One no rated 25 MW, 11kV at 0.8 pf and synchronous generator with
brush less excitation system will generate power for the plant with
excitation transformer.
One number Evacuation feeder in HT panel will be used for evacuation of
power.
The Plant auxiliary supply will be taken through 2 nos of 2.5 MVA 11/0.433kV auxiliary distribution transformers.
5.02.00. Plant start up power & Normal Running
The plant start up power is fed through customer 11 KV Cement plant
panel in Evacuation feeder. The plant auxiliaries are started through by
closing evacuation feeder breaker which is connected to customer 11kV
cement plant panel.
Once the STG is started, the incomer breaker of the generator feeder
connecting to the 11 kV switchgear at CPP can be closed i.e. the generator
will be synchronized with the start-up supply source. When the STG is in
service it will feed its own auxiliary loads and excess power will be
evacuated through evacuation breaker.
-
8/9/2019 Design basis report.pdf
8/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
8 of 27
6.00.00. Equipment Design
6.01.00. Generator:
The generator will be 2 poles, 50Hz, star connected, 3 phase type and it is
designed for continuous operation at its rated output of 25 MW at 0.8pf.
The cooling system will be closed air circuit water cooled (CACW) type.
The generator will be capable of continuous operation at rated MVA &
power factor at any voltage from 90% to 110% of rated voltage and within
a frequency range of 45 to 55 Hz.
The generator will be of cylindrical rotor design, degree of protection
conforming to IP 54 for alternator & IP 54 for exciter. The generator will
be provided with brushless digital excitation system. The generator is resin
rich type with class F insulation and class B temp rise.
6.02.00. AVR panel:
The excitation system shall be with Microprocessor based Digital AVR with2 nos auto channel and 2 nos manual channel. The digital Auto excitation
regulator will be fed through excitation transformer.
6.03.00. LASCPT PANEL
11 KV HT LASCPT panel shall include Surge Capacitor, Lightning arrestor
Excitation transformers, and Potential transformers. Degree of protection
for LASCPT Panel shall be IP55.
Surge Capacitor : 12kV, 0.25F Lightening arrestor : 12kV, 10kA Excitation Transformer : 11KV / 220V, YD11 Potential transformers : 11 kV/3 /110V/3/110V/3/110V/3
-
8/9/2019 Design basis report.pdf
9/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
9 of 27
The following table illustrates the Potential Transformers considered in
LASCPT Panel.
Sl.No PTs CORE 1 CORE 2 CORE 3
1 PT 1
CL 0.2, 100VA
(For AVR Panel
metering)
CL 3P, 100VA
(For GPR -2)
CL 3P , 100VA
(For GPR-2)
2 PT 2
CL 0.2, 100VA
(For Generator
Metering cum Syn
Panel)
CL 3P , 100VA
(For GPR -1)
CL 3P , 100VA
(For GPR-1)
3PT 3
(Spare PT)
CL 0.2, 100VA
(Spare)
CL 3P , 100VA
(Spare)
CL 3P , 100VA
(Spare)
6.04.00. NGR Panel :
11 KV HT NGR panel having Current transformers for phase and standby
E/F,63.51 Ohm Resistance , 100 Amps , for 30 sec, max limit up totemperature rise 375 deg C and Motorized neutral isolator with vacuum
contactor. Degree of protection for NGR Panel shall be IP55 for enclosure
and IP42 for resistance.
Resistance : 11kV, 63.51 Ohm, 100A for 30 sec Vacuum contactor : 12kV, 400A
-
8/9/2019 Design basis report.pdf
10/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
10 of 27
The following table illustrates the Current Transformers considered in NGR
Panel.
CTs RATIO CORE 1 CORE 2 CORE 3
CT-1 100 / 1A
CL : 0. 2, 10VA
(Generator
Metering Cum
Syn Panel)
CL:5P20,10VA
(GPR-1)
CL:5P20,10VA
( For GPR-2)
CT - 2 2500 / 1A
CL : 0. 2, 30VA ,
Imag 15 (ForAVR Metering)
CL : PS , KPV
250 ( For GPR-2)
-
CT - 3 2500 / 1A
CL : 0. 2, 30VA ,
Imag 15
(Spare)
CL : PS , KPV
250 (For GPR-1)-
CT - 4 2500 / 1A
CL : 0. 2, 30VA ,
Imag 15
(Spare)
CL : PS , KPV
250 (For
Generator
Metering cum
Syn Panel)
-
6.05.00. Generator Relay panel.
Protection of the generator shall be achieved through microprocessor
based, 2 Nos Numerical relay (P-343), one as primary and the other as
back up. This panel shall be of free standing, floor mounting, sheet steel
enclosed type. Degree of protection shall be of IP55. The panel mainlyconsists of:
Metering for Generator. Generator protection relay. Auxiliary relays for protection.
-
8/9/2019 Design basis report.pdf
11/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
11 of 27
6.05.01. The following protections are envisaged in protection relay of
generator-
Generator Differential Relay (87G) Over Fluxing (24) Negative Phase Sequence (46) Non directional phase over current ( 50) Inadvertent Energisation (Dead machine) (50/27) Neutral voltage displacement / Residual over voltage (59N) Voltage restrained over current (51V)
Non directional earth fault (51) Loss of Excitation (40) Generator VT fuse failure protection (60) Reverse power Relay (32 ) Low Forward Power protection (37) Under & over Frequency Relay (81U / 81O) Thermal over load relay ( 49) Rotor earth fault Relay (I & II stage) (64R) Stator earth fault Relay(51N)
Circuit breaker failure protection Relay (CBFP) AC control Supply Failure Relay DC control supply Failure Relay 100% stator earth fault relay (27TN) Under Voltage Relay(27) Over voltage relay (59) Earth fault relay (64F) Master trip relay (86-T A&B, 86-G A&B, 86C) Trip circuit supervision relays (95)
Check synchronizing relay(25C) Guard relay (25G) No volt relay (27 I) Auto synchronizer (25A) PT protection & supervision relay (60) CT protection & supervision relay MRU -4 relay far sensing HT Bus PT for df/dt
-
8/9/2019 Design basis report.pdf
12/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
12 of 27
6.06.00. Generator Control , Metering cum Synchronizing Panel
Considering various operating conditions of power plant Synchronizing
facility will be provided as under:
Auto, Manual synchronizing facility shall be provided for Generator
breaker, evacuation feeder breaker, Spare Power Evacuation Feeder
breaker and Generator incomer breaker will be provided through
Auto/Manual selector switch in Generator Control, metering &
synchronizing panel (GCMSP). Degree of protection shall be of IP55.
To facilitate auto synchronizing one number Auto synchronizer shall be
provided.
To facilitate manual synchronizing of breakers, double voltmeter, double
frequency meter, Synchroscope with cutoff switch, Synchro check relay,
Live/ Dead bus synchronizing switch and necessary lamps will be provided.
2 Nos 24 window annunciator shall be considered foe alarm and indication
purpose. Emergency push button for Generator and turbine trip shall beprovided. All the meters shall be digital with 0.5 accuracy class.
Transducers for 3P-4Wire MW (4 output), MVAr (2 Output), 3 Nos Voltage
(Two output), Frequency (Two Output), 3 Nos Current (2 Output) shall
be provided. It shall be programmable type with accuracy class 0.5%,
4-20 milli Amps output & auxiliary supply shall be 230V AC.
6.07.00. GENERATOR BUS DUCT ( SPBD)
11 KV, 3 Phase 3200 Amps, Segregated Phase Bus dud (SPBD) shall be
provided for generator Phase terminal to LASCPT Panel and Generator
Neutral terminal lo NGR panel. Maximum allowable temperature rise on
bus duct shall be 40 deg C and enclosure shall be 25 deg C. The degree of
protection for enclosure shall be IP55.
-
8/9/2019 Design basis report.pdf
13/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
13 of 27
6.08.00. High Voltage Switchgear:
The following High Voltage switchgear is envisaged. The design basis of
High Voltage switchgear will be as follows.
Type : Metal clad, draw out Service : Indoor Rated voltage : 11kV rated current : 3200A Bus Bar Material : Copper
Degree of protection : IP4X for enclosure Type of circuit breaker : VCB Duty cycle of breaker : O-0.3sec-CO-3min-CO Closing mechanism at CB : Spring charged stored energy Short Circuit Rating : 40kA for 1 sec
6.08.01. FEEDER DETAILS
Generator Feeder with PT 1 No. + 1 SPARE
Transformer feeder (2.5 MVA) 2 Nos + 1 SPARE Power Evacuation feeder with PT 1 No. + 1 SPARE Bus PT 1 NO
6.08.02. Protection & Metering Envisaged:
The protections envisaged for different feeders are listed below. Main
protective relays will be Numerical fixed type. However auxiliary relays will
be electromechanical type only .
A) 11 KV Incomer feeders:
Instantaneous and definite time over current protection. (50/51) Directional over current and earth fault protection. (67/67N) Under voltage protection with timer (27+2) Trip circuit supervision relay(74)
-
8/9/2019 Design basis report.pdf
14/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
14 of 27
Master trip relay(86)
Anti pumping relay(94) DC Fail relay(27D)
B) 11 KV Power evacuation feeder:
Instantaneous and IDMT over current protection.(50/51) Directional over current and earth fault protection. ((67/67N) Cable differential protection (87C) Under voltage protection with timer (27+2)
Trip circuit supervision relay(74) Master trip relay(86) Anti pumping relay(94) Neutral voltage displacement (59N) DC Fail relay(27 D)
C) Auxiliary transformer feeder:
Instantaneous and definite time over current protection.
Instantaneous and definite time earth fault protection. Winding temperature protection (49 WT) Oil temperature protection (49 OT) Bucholz relay (63). Trip circuit supervision relay(74) Master trip relay(86) Anti pumping relay(94) DC Fail relay(27 D)
D) Bus PT feeder
Under voltage relay with timer (27+2) DC Fail relay(27 D) Voltage balance relay 60)
-
8/9/2019 Design basis report.pdf
15/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
15 of 27
6.08.03. Metering:
Incoming feeder shall be provided with energy meters of class 0.5
accuracy, Digital Ammeter & Digital voltmeter. Auxiliary transformer
feeder shall be provided with Energy meter and Ammeter. However
evacuation feeder shall be provided with 0.2 accuracy class Trivector
meter & Digital ammeter.
6.09.00. LV Transformers:
6.09.01. LV Auxiliary Transformers
Auxiliary Transformers are Oil impressed type, 2.5 MVA rated ,2 x 100%
capacity, 11/ 0.433kV, ONAN cooled, Dyn11 vector group, 8.25 %
impedance, 99.5% efficiency at 50% load, 99.0% efficiency at 100% load,
outdoor type. This transformer will be provided with off load tap switch
having +5 to -5 % taps in steps of 2.5% on HV side. The LV side neutral
of this transformer will be solidly grounded.
The following assumptions as per normal power plant practice had beenmade in sizing the transformer
Load factor = 0.8 for continuous load, 0.2 for intermittent load
Coincidence factor = 0.05 for motorized valves, 0.5 for AC & heater
unit, 1 for continuous load
General:
The flux density considered is 1.67 T for the core and yoke at the rated
MVA, voltage & frequency. The transformer & all its accessories includingCTs shall be designed to withstand without any injury the thermal &
mechanical effects caused due to short circuit fault. Transformers shall
withstand, without injurious heating, the combined voltage & frequency
fluctuations.
-
8/9/2019 Design basis report.pdf
16/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
16 of 27
The transformer will be provided with following accessories and fittings:
Double float type buchholz relay having alarm and trip contacts Dial type (150 mm) oil temperature indicator with alarm and trip
contacts. Dial type (150 mm) winding temperature indicator (WTI) with
alarm and trip contacts. Magnetic oil level gauge, with low level alarm contact. Tap position indicator (Local ) Jacking pads.
Bi-directional flange wheels with suitable locking arrangement. LV neutral CT for LV REF protection and standby earth fault
protection. Rating & Diagram Plate Earthing Terminals Lifting Lugs Radiators Silica Gel Breather Explosion Vent with Diaphragm
Bottom drain cum Filter Valve Top Filter Valve Pressure relief valve.
6.09.02. Lighting Transformers:
Two no 2X100% dry type lighting transformer of 100 KVA, 415/415,
Dyn11, AN, 8.25 % impedance, greater than 99.5% efficiency at 50%
load, 99.0% efficiency at 100% load, 10% variations on secondary side
in 2.5% steps shall be provided. Lighting transformer shall be of class Hinsulation with temperature rise limited to class F.
6.10.00. NSPBD:
415 V, 3 Phase + Neutral 4000 Amps TPN Sand witch type Non
Segregated Phase Bus duct (NSPBD) shall be considered for connecting
-
8/9/2019 Design basis report.pdf
17/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
17 of 27
between auxiliary distribution transformer and 415V PCC. Maximum
allowable temperature rise on bus duct is 40 deg C and enclosure is 25deg C. The degree of protection for enclosure shall be IP54.Bus conductor
& Bus enclosure shall be Electrolytic grade Aluminum & MS respectively.
Bus bar material shall be of Aluminum flats grade 83401 WP, IS 5082
6.11.00. Low Voltage Switchgear - 415V
6.11.01. LTPCC:
Type : Fixed type Service : Indoor Current Rating : 4000 A Short circuit Rating : 50kA for 1 Sec. Protection : IP4X Busbar material : Aluminium Maximum current density : 0.8A/mm2 Incomers : Two with 4000 A ACB breaker Closing/tripping of ACB : 110 V DC / AC
The protections envisaged for different feeders were listed below.
a) LTPCC Incomers:
Instantaneous and IDMT over current protection (50/51) Instantaneous and IDMT earth fault protection (50/51N) Restricted earth fault relay (64R) Standby earth fault Relay (51N)
Under voltage protection with timer(27+2) DC failure relay (27 D)
b) LTPCC outgoing feeders
Thermal & magnetic releases for overcurrent & short circuit
protection shall be provided.
-
8/9/2019 Design basis report.pdf
18/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
18 of 27
c) LTPCC Bus PT feeders
Under voltage relay (27)
Metering:
Energy meter shall be provided in the all incoming and outgoing feeders of
PCC. Analog type ammeter and voltmeter with selector switch shall be
provided on the incoming feeders. For Bus PT feeders voltmeter with
selector switch will be provided
6.11.02. MCC
MCC shall be double front as per the contract. MCC shall have uniform
height placed side by side.
Type : Free standing fixed type Service : Indoor Short circuit Rating : 50kA for 1 Sec.
Current Rating : as per requirement Enclosure : IP 52 Rated voltage : 415V Maximum current density : 0.8A/mm2 Bus bar Material : Aluminum Incomers : Two
The CPP shall have following MCCs:
TG MCC
Boiler MCC (1 No for each PH + 1 No for each AQC) A/C, P&V MCC ACC & CWS MCC WTP MCC ACDB, MLDB, DCDB APFC MCC Emergency MCC
-
8/9/2019 Design basis report.pdf
19/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
19 of 27
6.12.00. 415V Motors
Motors are of TEFC IP55 enclosure with Class `F insulation with a
temperature rise limited to Class `B. LT motors shall have premium
efficiency (IE-3 type). Protection class shall be IP65. All the S1 Duty Cycle
(continuous running) motors shall be compatible with VFD (Inverter grade
for VFD application).
Local Push Button Station (LPBS) shall be provided for all the motors and
MOV's (for VFD LPBS shall have RPM meter and raise lower push buttons).
For motors 3.7 kW and above ,LPBS shall be equipped with Ammeter.
All motors below 75 kW: 415V rated, 3 phase/SFU+110 V (from MCC) AC
control contactor + O/L relay with single phase preventer
From 75 kW and above : 415 V rated, 3 phase contactor/ circuit controlled
from MCC through Digital motor protection relay with bearing temp.
For above 22kW motors ammeters shall be provided. For above 30kW
motors Space heaters shall be provided. For 75kW and above motorsbearing & winding temperature monitoring shall be provided.
7.00.00. DC system
One no 800AH 1X100% (2V X 55), 110 Volts , 2 wire ungrounded system ,
four (4) hours back up Vented type Plante Lead acid Battery of adequate
capacity with their Float cum Boost charger shall be considered for DC
loads with associated FRP battery racks etc..
110 V DC power supply is the most reliable source of power supply for
control, protection, interlock and annunciation requirements of the power
station.
-
8/9/2019 Design basis report.pdf
20/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
20 of 27
The rating of charger will be calculated as below:
Float charger:
Continuous DC load + trickle charging current of battery +15 % margin.
Boost charger
Boost charging current of battery+ continuous DC load.
Float cum Boost charger:
Boost charging current of battery.
Battery Charger
Type - One float and float cum Boost charger Voltage regulation - 110V 1% Service - Indoor Enclosure - Sheet steel Degree of protection - IP 42 AC input - 415V, 3ph, 3W, 50Hz, 50kA
Busbar Material Aluminum
7.00.01. DC Distribution Board
DC Distribution Board constructional features will be given below
Type - Fixed type NON-Compartmentalized Service - Indoor Enclosure - Sheet steel
Degree of protection - IP 42 Short circuit rating - 10kA for 1 sec (Tentative) Bus bar Material Aluminium
-
8/9/2019 Design basis report.pdf
21/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
21 of 27
8.00.00. Auto Power Factor Correction Panel
2 Nos x 500 WAR , 113 STEPS (50 KVAR OF -10 Nos ) capacitor units shall
be hermetically sealed type, with two bushings and shall be designed to
carry a minimum of 1 .5 times the rated current at 110% of rated voltage
and 1.35 times rated reactive power, continuously. The capacitors should
be of non PCB type, suitable for operation in tropical areas
9.00.00. Cabling System:
9.01.00. Cables:
9.01.01. HT Power cable
HT power cable used for 11 kV systems will be 12.7/22kV (E) grade.
The cable will be heavy-duty, stranded Aluminum conductor with FRLS,
conductor screened with semiconductor, extruded XLPE insulation and
insulation screen (semiconductor +copper tape), extruded PVC inner
sheath, G.S flat (for multi-core)/aluminium wire (for single core) armoured
and extruded PVC (ST-2) outer sheathed conforming to IS7098 part-II.Maximum operating temperature under normal condition for XLPE
insulation cables will be 90C. Trefoil Clamps for HT Cable shall be
provided.
The following rating of HT cable XLPE (UE) insulated shall be
envisaged for the Plant
LASCPT panel to HT switch gear panel - 4RX 1C X 630 Sq.mm/ph
GPP-4 HT panel to Existing HT Panel for power evacuation - 4R X1C X 630 Sq.mm/ph
GPP-4 HT Panel to Auxiliary transformer 1 & 2 - 1R X 3C X 300
Sq.mm
-
8/9/2019 Design basis report.pdf
22/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
22 of 27
9.01.02. LT Power cable
LT power cable used for 415V AC, 230VAC, 110V AC & 110 V DC system
will be 1.1kV (E) grade, stranded aluminum conductor with FRLS, XLPE
insulated, not extruded PVC inner sheath, G.S. Flat/round wire with
armoured, extruded PVC (ST-2) outer sheath conforming to IS 7098 part-
I. Maximum operating temperature under normal condition for XLPE
insulation cables will be 90C. Cables less than 10 sq.mm shall be of
copper conductor. DC Power cables for EOP will be UNINYVIN CABLE &
Cable for UPS will be Copper armour cable. Separate earthing cable shall
be laid from each VFD to respective Motor.
9.01.03. Control cable
Control cables will be 1100V (E) grade, multi-core with stranded 1.5 mm
and copper conductor with FRLS, PVC insulated, extruded PVC inner
sheath, G.S. flat / round wire armoured and extruded sheath of PVC (ST-
1) with numbering of all cores, conforming to IS 1554 part-I/IS 5831.
9.02.00. Cable Tagging
Cable tagging shall be at both end & at every 20 meter considered for all
cable. Anodised type tagging plate will be provided.
9.03.00. Cable Trays
Cables laid in overhead racks shall be GI ladder/perforated type trays for
electrical/instruments with proper prefabricated bends respectively in
outdoor areas and supports shall be MS (painted). The top cable tray shallbe covered with GI sheet canopy/GI sheet covering in outdoor cable racks.
All outdoor cable racks shall be vertically oriented. Galvanized cable trays
for Boiler, Turbine, ACC and BOP area shall be supplied. For WTP area all
cable tray shall be FRP type only.
-
8/9/2019 Design basis report.pdf
23/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
23 of 27
Separate cable tray for HT Power, LT Power, Control Cable, Instt. Analog
Input/output cable each, Instt. Digital Input/output cables each &Compensating Cable shall be considered.
No. Of Cable layers per Cable tray shall be as follows:
HT Power Cable & LT Power(up to 120 mm2) Cable - One Layer LT Power Cable (below 120mm2) - Two Layer Control Cable - Three Layer Instt. Cables - Three Layer
10.00.00. llumination System:
10.01.00. Basic Concept
The system provides lighting and service power at 240V, single phase 50
Hz to receptacles and single phase feeders in plant areas. The plant
illumination system includes normal cum Emergency lighting and critical
DC lighting.
10.02.00. 100 % Normal cum Emergency A.C lighting
Normal cum Emergency A.C. lighting will be provided by lighting fixtures
distributed throughout the plant. Separate circuits with timers will be
provided where round the clock lighting is not required. Lighting fixtures
will be fed from respective area lighting panels, which in turn receive
supply from lighting distribution board. MLDB shall be provided with Dual
incomer. LDBs shall be equipped with 30 mA ELCB. In Normal condition
the Main lighting distribution board will be fed from 415V PCC &Emergency MCC through 2 x 100%, lighting transformer. In blackout
condition then the supply for MLDB shall be fed from Emergency MCC
(which is connected to Customer DG set) through lighting transformer .
-
8/9/2019 Design basis report.pdf
24/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
24 of 27
10.03.00. Emergency DC Lighting
Critical DC lighting will be provided with bulk head lamps at Cable Cellar
MCC room, CCR, TG house, stair cases, steam drums on all boilers & Start
up vents. This DC lighting will remain OFF normally and will be switched
ON automatically when main AC supply fails. The power supply for lighting
will be fed from 110V DCDB. FL DC lamp with integral battery shall be
provided for Boiler area MCC room.
10.04.00. Power Receptacles / Welding Sockets
1 Phase & 3 Phase power receptacles will be provided for alternative floors
of Boiler area, each floor ACC areas and at least 3 Nos in TG building, MCC
room, cable cellar area. 3 Phase Welding Sockets will be provided at each
stage of boiler, TG Floor & as required in ACC area etc. 24 Volt AC power
receptacles with transformers and proper distribution at all location of
boilers, ACC floors will be provided.
10.05.00. The type of fixtures & type of luminaries for different areas is
listed below:
Area Description Type of Fixture Type of LuminariesCable gallery,Transformer AreaCompressor room,Battery charger room,P&V room & Storeroom
Industrial Trough Type 2x28 W FluorescentLamp
MCC Switchgear roomIndustrial Trough typewith ReflectorArrangement
2x36 W FluorescentLamp
Battery rooms Corrosion Proof 2x36 W FluorescentLampControl Rooms & Officerooms
Industrial Trough typewith mirror optics
2x28 W FluorescentLamp
Turbine houses Integral Well glassIndustrial type 1 X 80W HPMV
TG Building Operatingfloor
Industrial type highbay 1x400 W MH Lamp
TG Building Staircases Industrial Trough Type 2x36 W FluorescentLamp
-
8/9/2019 Design basis report.pdf
25/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
25 of 27
Boiler area, Boilerplatforms ACC, & WTP
Integral Well glassIndustrial type
1x70 W MH Lamp
Toilet areas Integral Well glassIndustrial type1 X 36 W Fluorescent
Lamp
Street Lights & Outdoorlights
Integral Well glassIndustrial type withtimer arrangement
1 x 150 W MH Lamp
DC lights in TG Building Bulk head type 1X 100W GLSDC lights in Boiler areaMCC room
FL with integral batterytype
2x28 W FluorescentLamp
11.00.00. Earthing & Lightning Protection System
11.01.00. Plant Earthing:
System earthing will be adopted to facilitate earth fault relaying and to
reduce the magnitude of transient over-voltage. The system earthing
involves earthing of the neutrals of generator. Low impedance earthing is
used for 11 KV system to limit the earth fault current to about 100 A by
grounding generator neutral by means of Neutral Grounding Resistor
(NGR).
A ground grid of 32mm MS Rod will be provided encircling the plantthrough a system of grounding electrodes and pits to keep ground
resistance less than one ohm. Earth mat shall be laid below 500mm below
absolute ground level and earth pits shall be 1.5 meter away from nearby
building walls. Every electrical system will have dual earthing.
Treated earth pits will be considered for generator NGR, Aux. Transformer
Neutral, lightning arrestor & equipments. All Earthing electrodes shall be
of Gel type maintenance free (homogeneous readymade mixture).
All instrument earth pits shall be maintenance free and configuring delta
spaced by 6 meter with redundant copper cable connection.The underground grid shall be connected with lightning protection earth
electrodes below ground at average depth of 500 mm.
-
8/9/2019 Design basis report.pdf
26/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
DALIANEAST-CCE-20006-DBR-XXX-800 / REV 00
DESIGN BASIS REPORT(ELECTRICAL ) Page
26 of 27
11.01.01. Equipment Earthing:
Electrical equipment shall be provided with two separate and distinct
grounding pads, each complete with tapped hole, galvanized bolt and
spring washer for connection to station ground conductors.
The neutral of generator and transformer shall be earthed through two
dedicated earth pits.
Flat from the main earthing grid to local network and electrical equipment
will be GI flats of suitable size, except for smaller items, which will beconnected using steel wire. However, for portable equipment, if one of the
conductors of the connecting cable/plug socket is earthed, no other earth
connection is required.
An earthing conductor will be installed along the entire length of top most
power cable trays. The tray earth will be connected at various locations to
the station earth grid. The offsite areas will be connected through the
earth flats running along the cable trays. Earth continuity will be provided
for all cable trays & conduits. The following aspects will be addressedduring design, of the equipment earthing system to be adopted.
Availability of sufficient earth current for effective relaying. Stabilization of circuit potential with respect to earth.
The size of earth conductor used for individual equipment earthing
Main Ground Conductor: 32 mm MS rod
Earth Electrodes : MS Rod 32 mm dia, 3 m long pipe Generator and Transformer Body: 75 mm x 10 mm GI Flat. Transformer and Generator Neutral: 75 mm x 10 mm GI Flat. HT switchgear Panels: 50 mm x 6 mm GI Flat. 415V PMCC, MCC, DCDB, MLDB Structures, Bus duct, Control
Panel, Cable Trays: 50 mm x 6 mm GI Flat.
-
8/9/2019 Design basis report.pdf
27/27
M/s DALIAN EAST NEW ENERGY DEVELOPMENTCO.LTD
1X23.5 MW WASTE HEAT RECOVERY POWER PLANT
FOR SHREE CEMENTS LIMITED, RAS, RAJASTHAN
LT AC Motors from 110kW up to 132 KW: 50 mm x 6 mm GI Flat.
LT AC Motors above 30kW up to 90 KW: 25 mm x 6 mm GI Flat. LT AC Motors from 5.5kW up to 30 KW: 25 mm x 3 mm GI Flat. LT AC Motors below 5.5 KW : 8 SWG GI wire Local Panels, LPBS, Switch sockets, LDBs, JB,Receptacles: 8 SWG
GI wire
11.02.00. Lightning Protection:
The main purpose of the lightning protection system is to provide
protection to structures from lightning strokes and provide a lowresistance-conducting path for lightning discharge to earth. For metal
structures, which are continuous down to the ground level, no lightning
protection is required except adequate grounding connections. Air
termination network with down conductor and earthing electrodes will be
provided on the basis of IS-2309 recommendations.
The zone of protection will depend on each structure height, overall shape,
and physical location in relation to other structures.