NITIN CORPORATION

402, 4th

Floor,

Bezzola Commercial Complex,

Sion – Trombay Road,

Chembur,

Mumbai – 400071,

India.

WEB: www.corponit.com E – MAIL: enquiry@corponit.com

nitincorporation@yahoo.com

FAX : +91 - 22 - 25235386

PH (O) : +91 - 22 - 25234478/67973677

THE FOLLOWING NEW ALTERNATORS / GENERATOR ENDS ARE AVAILABLE FOR

SALE WITH US WITH IMMEDIATE DELIVERY:

19 Nos. – NEW Leroy Somer & Stamford make Alternators / Generators Ends as per

technical details below:

LIST OF ALTERNATOR / GENERATOR ENDS AVAILABLE FOR

SALE.

Make Model KVA V KW RPM YOM

Leroy Somer LSA51.2M60 2300 480 1968,6 1800 2012

Leroy Somer LSA51.2M60 2300 480 1968,6 1800 2012

Leroy Somer LSA51.2M60 2300 480 1968,6 1800 2012

Leroy Somer LSA51.2M60 2300 480 1968,6 1800 2012

Leroy Somer LSA51.2M60 2300 480 1968,6 1800 2012

Stamford PI734E1 2600 480 1840 1800 2012

Stamford PI734E1 2600 480 1840 1800 2012

Stamford PI734E1 2600 480 1840 1800 2012

Stamford PI734E1 2600 480 1840 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Stamford PI734F1 2600 480 2080 1800 2012

Leroy Somer LSA51.2S55 1800 380 1440 1800 2009

Leroy Somer LSA51.2S55 1800 380 1440 1800 2009

Leroy Somer LSA51.2M60 2300 480 1600 1800 2012

NITIN

CORPORATIO

N

Réf. 3367 GB - 2.33 / b - 04.02

35

30

25

20

15

10

ALTERNATORS LSA 51.2 - 4 Pole

Electrical and mechanical data

NITIN

CORPORATIO

N

ELECTRICAL DATAInsulation class H Excitation system A R E P + PMIWinding pitch - Code 2/3 - (N° 6S) A.V.R. model R 449Leads 6 Voltage regulation (steady state) ± 0,5 %Drip proof IP 23 Sustained short-circuit current 300% (3 IN) : 10sAltitude ≤ 1000 m Total harmonic (*) TGH / THC < 2,5 %Overspeed 2250 min -1 Waveform : NEMA = TIF - (*) < 50Air flow 2,5 m3/s Waveform : I.E.C. = THF - (*) < 2 %(*) Total harmonic content line to line, at no load or full rated linear and balanced load

According to : I.E.C. 34.1/34.2 - U.T.E. : NF C 51.111 - V.D.E. 0530 - B.S. 4999 & 5000 - NEMA : MG 1.22 - ISO 8528 . 3 - CSA (C22.2 + UL 2200). Products and materials shown in this catalogue may, at any time, be modified in order to follow the latest technological developments, improve the design or change the conditions of utilisation.Their description cannot in any case engage Leroy-Somer's liability. The values indicated are typical values .

ALTERNATORS

RATINGS : kVA / kW - Power factor = 0,8 Duty/Ambiant T° Continuous / 40°C Stand-by / 40°C Stand-by / 27°CClass/T° rise H / 125° K F / 105° K H / 150° K H / 163° K

Phase 3 ph. 3 ph. 3 ph. 3 ph. Y ∆

380V220V

400V230V

415V240V

380V220V

400V230V

415V240V

380V220V

400V230V

415V240V

380V220V

400V230V

415V240V

51.2 S55 kVA 1800 1620 1890 1980

kW 1440 1296 1512 1584

51.2 M60 kVA 2000 1800 2100 2200

kW 1600 1440 1680 1760

51.2 L70 kVA 2150 1935 2255 2365

kW 1720 1548 1804 1892

51.2 VL 85 kVA 2250 2025 2360 2475

kW 1800 1620 1888 1980

EFFICIENCIES (%) - Class H / 40° C Three phase : 400 V

P.F. = 0,8 P.F. = 1

1/4 2/4 3/4 4/4 St.by 1/4 2/4 3/4 4/4 St.by

51.2 S55 94,9 96,2 96,1 95,7 95,4 95,4 97 97,2 97,1 97

51.2 M60 95 96,2 96,2 95,8 95,6 95,5 97 97,3 97,2 97,1

51.2 L70 95 96,4 96,4 96,1 96 95,4 97,1 97,4 97,3 97,3

51.2 VL 85 94,8 96,5 96,7 96,5 96,4 95,2 97,1 97,5 97,6 97,5

REACTANCES (%) - TIME CONSTANTS (ms) - CLASS H / 400 V51.2 S55 51.2 M60 51.2 L70 51.2 VL 85

Kcc Short-circuit ratio 0,34 0,36 0,39 0,45Xd Direct axis synchronous reactance unsaturated 362 348 320 278Xq Quadrature axis synchronous reactance unsaturated 217 209 192 167

T'do Open circuit time constant 2660 2770 2910 3050X'd Direct axis transient reactance saturated 27,4 26,2 23,8 20,4T'd Short circuit transient time constant 237 245 254 263X"d Direct axis subtransient reactance saturated 14,2 13,6 12,4 10,6T"d Subtransient time constant 22 23 24 26X"q Quadrature axis subtransient reactance saturated 17,8 17 15,5 13,2Xo Zero sequence reactance unsaturated 3,4 3,2 2,9 2,5X2 Negative sequence reactance saturated 16 15,3 13,9 12Ta Armature time constant 38 41 44 48

OTHER DATA - CLASS H / 400 V io (A) No load excitation current 1,5 1,5 1,6 1,6ic (A) Full load excitation current 6 5,9 5,5 5uc (V) Full load excitation voltage 63 62 60 56

ms Recovery time (∆U = 20 % transient) < 700 < 700 < 700 < 700kVA Motor start. (∆U = 20% sust.) or (∆U = 50% Transient) 3600 4000 4300 4500% Transient dip (rated step load) - PF : 0,8 LAG 12 12 11 10

kW No load losses 16 17,5 19,2 21,7kW Heat rejection 64,7 70,1 69,8 65,2

LSA 51.2 - 4P 50 Hz - 1500 r.p.m.

NITIN

CORPORATIO

N

Products and materials shown in this catalogue may, at any time, be modified in order to follow the latest technological developments, improve the design or change the conditions of utilisation.Their description cannot in any case engage Leroy-Somer's liability. The values indicated are typical values .

0 500 1000 1500 2000 2500 3000 3500 400000

5

10

15

20

25

0

kVA at 0,8 power factor

% V

olta

ge d

ip

Load application

0 500 1000 1500 2000 2500 300000

5

10

15

20

25

0

kVA at 0,8 power factor

% V

olta

ge r

ise

Load rejection

1) For a starting P.F. differing from 0,6 the starting kVA have to be multiplied by (Sine Ø /0,8)2) If voltage is not 400V(Y) , 230V(∆) at 50 Hz then kVA must be multiplied by (400/U)2 or (230/U)2.

0 500 1000 1500 2000 2500 3000 3500 4000 450000

10

20

30

0

Locked rotor - kVA at 0,6 power factor

% V

olta

ge d

ip

Motors starting

ALTERNATORS

VL 85

LSA 51.2 - 4P 50 Hz - 1500 r.p.m.

TRANSIENT VOLTAGE VARIATION - 400V

L 70

M 60

S 55

VL 85

L 70

M 60 S 55

VL 85

L 70

M 60

S 55

NITIN

CORPORATIO

N

ELECTRICAL DATAInsulation class H Excitation system A R E P + PMIWinding pitch - Code 2/3 - (N° 6S) A.V.R. model R 449Leads 6 Voltage regulation (steady state) ± 0,5 %Drip proof IP 23 Sustained short-circuit current 300% (3 IN) : 10sAltitude ≤ 1000 m Total harmonic (*) TGH / THC < 2,5 %Overspeed 2250 min -1 Waveform : NEMA = TIF - (*) < 50Air flow 2,8 m3/s Waveform : I.E.C. = THF - (*) < 2 %(*) Total harmonic content line to line, at no load or full rated linear and balanced load

According to : I.E.C. 34.1/34.2 - U.T.E. : NF C 51.111 - V.D.E. 0530 - B.S. 4999 & 5000 - NEMA : MG 1.22 - ISO 8528 . 3 - CSA (C22.2 + UL 2200). Products and materials shown in this catalogue may, at any time, be modified in order to follow the latest technological developments, improve the design or change the conditions of utilisation.Their description cannot in any case engage Leroy-Somer's liability. The values indicated are typical values .

ALTERNATORS

RATINGS : kVA / kW - Power factor = 0,8 Duty/Ambiant T° Continuous / 40°C Stand-by / 40°C Stand-by / 27°CClass/T° rise H / 125° K F / 105° K H / 150° K H / 163° K

Phase 3 ph. 3 ph. 3 ph. 3 ph.Y∆

380V 416V240V

440V 480V 380V 416V240V

440V 480V 380V 416V240V

440V 480V 380V 416V240V

440V 480V

51.2 S55 kVA 1710 1870 1980 2160 1540 1685 1780 1945 1795 1965 2080 2265 1880 2060 2175 2375

kW 1368 1496 1584 1728 1232 1348 1424 1556 1436 1572 1664 1812 1504 1648 1740 1900

51.2 M60 kVA 1900 2080 2200 2400 1710 1870 1980 2160 1995 2185 2310 2520 2090 2285 2420 2640

kW 1520 1664 1760 1920 1368 1496 1584 1728 1596 1748 1848 2016 1672 1828 1936 2112

51.2 L70 kVA 2045 2235 2365 2580 1840 2010 2130 2320 2145 2350 2485 2710 2245 2460 2600 2835

kW 1636 1788 1892 2064 1472 1608 1704 1856 1716 1880 1988 2168 1796 1968 2080 2268

51.2 VL 85 kVA 2140 2340 2475 2700 1925 2105 2230 2430 2245 2455 2600 2835 2350 2575 2720 2970

kW 1712 1872 1980 2160 1540 1684 1784 1944 1796 1964 2080 2268 1880 2060 2176 2376

EFFICIENCIES (%) - Class H / 40° C Three phase : 480 V

P.F. = 0,8 P.F. = 1

1/4 2/4 3/4 4/4 St.by 1/4 2/4 3/4 4/4 St.by

51.2 S55 93,4 95,5 95,8 95,6 95,4 93,8 96,2 96,8 96,8 96,8

51.2 M60 93,6 95,6 95,9 95,6 95,5 94 96,3 96,8 96,9 96,8

51.2 L70 93,6 95,8 96,1 96 95,8 94 96,4 97 97,1 97,1

51.2 VL 85 93,4 95,8 96,3 96,3 96,2 93,8 96,3 97 97,2 97,3

REACTANCES (%) - TIME CONSTANTS (ms) - CLASS H / 480 V51.2 S55 51.2 M60 51.2 L70 51.2 VL 85

Kcc Short-circuit ratio 0,34 0,36 0,39 0,45 Xd Direct axis synchronous reactance unsaturated 362 348 320 278Xq Quadrature axis synchronous reactance unsaturated 217 209 192 167

T'do Open circuit time constant 2660 2770 2910 3050X'd Direct axis transient reactance saturated 27,4 26,2 23,8 20,4T'd Short circuit transient time constant 237 245 254 263X"d Direct axis subtransient reactance saturated 14,2 13,6 12,4 10,6T"d Subtransient time constant 22 23 24 26X"q Quadrature axis subtransient reactance saturated 17,8 17 15,5 13,2Xo Zero sequence reactance unsaturated 3,4 3,2 2,9 2,5X2 Negative sequence reactance saturated 16 15,3 13,9 12Ta Armature time constant 38 41 44 48

OTHER DATA - CLASS H / 480 V io (A) No load excitation current 1,5 1,5 1,6 1,6ic (A) Full load excitation current 6 5,9 5,5 5uc (V) Full load excitation voltage 63 62 60 56

ms Recovery time(∆U = 20 % transient) < 700 < 700 < 700 < 700kVA Motor start. (∆U = 20% sust.) or (∆U = 50% Transient) 4320 4800 5160 5400% Transient dip (rated step load) - PF : 0,8 LAG 12 12 11 10

kW No load losses 28,2 30,1 32,5 36kW Heat rejection 79,5 88,3 86 83

LSA 51.2 - 4P 60 Hz - 1800 r.p.m

NITIN

CORPORATIO

N

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 550000

10

20

30

0

Locked rotor - kva at 0,6 power factor

% V

olta

ge d

ip

Motor starting

Products and materials shown in this catalogue may, at any time, be modified in order to follow the latest technological developments, improve the design or change the conditions of utilisation.Their description cannot in any case engage Leroy-Somer's liability. The values indicated are typical values .

1) For a starting P.F. differing from 0,6 the starting kVA have to be multiplied by (Sine Ø /0,8)2) If voltage is not 480V(Y), 277V(∆), 240V(YY ) at 60 Hz then kVA must be multiplied by (480/U)2 or (277/U)2 or (240/U)2.

ALTERNATORS LSA 51.2 - 4P 60 Hz - 1800 r.p.m.

TRANSIENT VOLTAGE VARIATION - 480 V

0 500 1000 1500 2000 2500 3000 3500 4000 450000

5

10

15

20

25

0

kVA at 0,8 power factor

% V

olta

ge d

ip

Load application

0 500 1000 1500 2000 2500 3000 350000

5

10

15

20

25

0

kVA at 0,8 power factor

% V

olta

ge r

ise

Load rejection

VL 85

L 70

M 60

S 55

VL 85

L 70

M 60 S 55

VL 85

L 70

M 60

S 55

NITIN

CORPORATIO

N

Cables

4 holes Ø 334 holes Ø 14,5

4 holes Ø M24

S DIA,XBG Eq. Sp. holes on M P.C.D.

AIR INLETAIR OUTLET

YD

IA, X

Eq.

Sp.

hol

es o

n U

P.C

.D.

LB

L

Xg

V

Ø B

X

Ø N

Ø 9

98

AH

895

50

0

1395

35

ß

0 - 0,

127

- 0,

050

- 0,

100

12

7

PMG Option +110

IP 23 Option

Opt

ion

26060

6040

150 150220

195B

Ø 8

71Ø

975

6801080

+1

0

220

750 80 80

910

610 140 140 140

Lr

Ø 2

25

Ø 1

70

Ø 1

40

Xr

Ø 2

40

Ø 2

20

FRAME DIMENSIONS (mm) Mass (kg)

TYPEL

without PMG LB B V Xg M

LSA 51.2 S55 1677 1655 900 744 735 3745

LSA 51.2 M60 1777 1755 1000 844 770 4040

LSA 51.2 L70 1877 1855 1100 944 825 4445

LSA 51.2 VL85 1977 1955 1200 1044 885 4995

ALTERNATORS LSA 51.2 - 4P Single bearing

DIMENSIONS

TORSIONAL ANALYSIS DATA

CENTRE OF GRAVITY : Xr (mm) - ROTOR LENGTH : Lr (mm) - MASS : M (kg) - MOMENTS OF INERTIA : J (kgm2) : (4J = MD2)

Flex plate S.A.E. 18 Flex plate S.A.E. 21 Flex plate S.A.E. 24

TYPE Xr Lr M J Xr Lr M J Xr Lr M J

LSA 51.2 S55 661 1555,5 1357 41,1 643 1555,5 1359 41,9 640 1555,5 1365 42,6

LSA 51.2 M60 703 1655,5 1475 44,8 685 1655,5 1479 45,6 682 1655,5 1483 46,3

LSA 51.2 L70 754 1755,5 1630 50 736 1755,5 1632 50,8 734 1755,5 1638 51,6

LSA 51.2 VL85 819 1855,5 1833 57,2 801 1855,5 1835 58 799 1855,5 1841 58,8

Products and materials shown in this catalogue may, at any time, be modified in order to follow the latest technological developments, improve the design or change the conditions of utilisation.Their description cannot in any case engage Leroy-Somer's liability. The values indicated are typical values .

Coupling

FlangeFlex plate

SAE00

SAE 0

SAE 24 •

SAE 21 •

SAE 18 • •

FLANGE DIMENSIONS (mm) FLEX PLATE DIMENSIONS (mm)S.A.E. N M XBG S ß S.A.E. BX U X Y AH

00 787,4 850,9 16 14 11° 15' 18 571,5 542,9 6 18 15,8

0 647,7 679,5 16 14 11° 15' 21 673,1 641,3 12 18 0

24 733,4 692,1 12 21 0

NITIN

CORPORATIO

N4 holes Ø 334 holes Ø 14,5

4 holes Ø M24

M12 DIA, 16 Eq. Sp. on Ø 850,9

AIR INLET AIR OUTLET

LB

V

L

Xg

Ø 7

87,4

Ø 1

50

Ø 9

85

895

50

0

1395

35

ß

m6

f8

7

PMG option +110 O

ptio

n

Câbles

260

250

60

6040

150 150220

195B

Ø 8

71Ø

975

6801080

+1

0

220

750 80 80

910

610 140 140 140

138

M30

36

20

Lr

Ø 2

25

Ø 1

70

Ø 1

40Xr

315

Ø 2

40

Ø 1

82

Ø 1

60

Ø 1

50

ALTERNATORS LSA 51.2 - 4P Two bearing

DIMENSIONS

TORSIONAL ANALYSIS DATA

Products and materials shown in this catalogue may, at any time, be modified in order to follow the latest technological developments, improve the design or change the conditions of utilisation.Their description cannot in any case engage Leroy-Somer's liability. The values indicated are typical values .

FRAME DIMENSIONS (mm) Mass (kg)

TYPEL

wihout PMG LB B V Xg M

LSA 51.2 S55 1905 1655 900 744 735 3725

LSA 51.2 M60 2005 1755 1000 844 770 4020

LSA 51.2 L70 2105 1855 1100 944 825 4425

LSA 51.2 VL85 2205 1955 1200 1044 885 4975

CENTRE OF GRAVITY : Xr (mm) - ROTOR LENGTH : Lr (mm) - MASS : M (kg) - MOMENTS OF INERTIA : J (kgm2) : (4J = MD2)

TYPE Xr Lr M J

LSA 51.2 S55 605,6 1783,5 1281 38,9

LSA 51.2 M60 647,6 1883,5 1398 42,6

LSA 51.2 L70 698,8 1983,5 1553 47,8

LSA 51.2 VL85 763,3 2083,5 1766 55,1

NITIN

CORPORATIO

N

MOTEURS LEROY-SOMER 16015 ANGOULÊME CEDEX - FRANCE

http://www.leroy-somer.com

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PI734E - Winding 312

Technical Data Sheet

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PI734ESPECIFICATIONS & OPTIONS

STANDARDSStamford industrial generators meet the requirements of BS EN 60034 and the relevant sections of other national and international standards such as BS5000, VDE 0530, NEMA MG1-32, IEC60034, CSA C22.2-100, AS1359.Other standards and certifications can be considered on request.

DESCRIPTIONThe STAMFORD PI range of synchronous ac generators are brushless with a rotating field. They are separately excited by the STAMFORD Permanent Magnet Generator (PMG). This is a shaft mounted, high frequency, pilot exciter which provides a constant supply of clean power via the Automatic Voltage Regulator (AVR) to the main exciter. The main exciter output is fed to the main rotor, through a full wave bridge rectifier, protected by surge suppression. VOLTAGE REGULATORSThe PI range generators, complete with a PMG, are available with one of two AVRs. Each AVR has soft start voltage build up and built in protection against sustained over-excitation, which will de-excite the generator after a minimum of 8 seconds. Underspeed protection (UFRO) is also provided on both AVRs. The UFRO will reduce the generator output voltage proportional to the speed of the generator below a pre-settable level.

The MX341 AVR is two phase sensed with a voltage regulation of ± 1 %. (see the note on regulation).

The MX321 AVR is 3 phase rms sensed with a voltage regulation of 0.5% rms (see the note on regulation). The UFRO circuit has adjustable slope and dwell for controlled recovery from step loads. An over voltage protection circuit will shutdown the output device of the AVR, it can also trip an optional excitation circuit breaker if required. As an option, short circuit current limiting is available with the addition of current transformers.

Both the MX341 and the MX321 need a generator mounted current transformer to provide quadrature droop characteristics for load sharing during parallel operation. Provision is also made for the connection of the STAMFORD power factor controller, for embedded applications, and a remote voltage trimmer.

WINDINGS & ELECTRICAL PERFORMANCEAll generator stators are wound to 2/3 pitch. This eliminates triplen (3rd, 9th, 15th …) harmonics on the voltage waveform and is found to be the optimum design for trouble-free supply of non-linear loads. The 2/3 pitch design avoids excessive neutral currents sometimes seen with higher winding pitches. A fully connected damper winding reduces oscillations during paralleling. This winding, with the 2/3 pitch and carefully selected pole and tooth designs, ensures very low levels of voltage waveform distortion.

TERMINALS & TERMINAL BOXStandard generators feature a main stator with 6 ends brought out to the terminals, which are mounted on the frame at the non-drive end of the generator. A sheet steel terminal box contains the AVR and provides ample space for the customers' wiring and gland arrangements. It has removable panels for easy access.

SHAFT & KEYSAll generator rotors are dynamically balanced to better than BS6861:Part 1 Grade 2.5 for minimum vibration in operation. Two bearing generators are balanced with a half key.

INSULATION/IMPREGNATIONThe insulation system is class 'H', and meets the requirements of UL1446.All wound components are impregnated with materials and processes designed specifically to provide the high build required for static windings and the high mechanical strength required for rotating components.

QUALITY ASSURANCEGenerators are manufactured using production procedures having a quality assurance level to BS EN ISO 9001.

NOTE ON REGULATIONThe stated voltage regulation may not be maintained in the presence of certain radio transmitted signals. Any change in performance will fall within the limits of Criteria 'B' of EN 61000-6-2:2001. At no time will the steady-state voltage regulation exceed 2%.

DE RATESAll values tabulated on page 8 are subject to the following reductions

5% when air inlet filters are fitted.10% when IP44 Filters are fitted.3% for every 500 metres by which the operating altitude exceeds 1000 metres above mean sea level.3% for every 5°C by which the operational ambient temperature exceeds 40°C. Note: Requirement for operating in an ambient temperature exceeding 60°C must be referred to the factory.

Note: Continuous development of our products entitles us to change specification details without notice, therefore they must not be regarded as binding.

Front cover drawing is typical of the product range.

2

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CONTROL SYSTEM SEPARATELY EXCITED BY P.M.G.

A.V.R. MX341 MX321

VOLTAGE REGULATION ± 1 % ± 0.5 % With 4% ENGINE GOVERNING

SUSTAINED SHORT CIRCUIT

INSULATION SYSTEM

PROTECTION

RATED POWER FACTOR

STATOR WINDING

WINDING PITCH

WINDING LEADS

MAIN STATOR RESISTANCE

MAIN ROTOR RESISTANCE

EXCITER STATOR RESISTANCE

EXCITER ROTOR RESISTANCE

R.F.I. SUPPRESSION BS EN 61000-6-2 & BS EN 61000-6-4,VDE 0875G, VDE 0875N. refer to factory for others

WAVEFORM DISTORTION NO LOAD < 1.5% NON-DISTORTING BALANCED LINEAR LOAD < 5.0%

MAXIMUM OVERSPEED 2250 Rev/Min

BEARING DRIVE END BALL. 6228 C3

BEARING NON-DRIVE END BALL. 6319 C3

1 BEARING 2 BEARING

WEIGHT COMP. GENERATOR

WEIGHT WOUND STATOR

WEIGHT WOUND ROTOR

WR² INERTIA

SHIPPING WEIGHTS in a crate

PACKING CRATE SIZE

TELEPHONE INTERFERENCE

COOLING AIR

VOLTAGE STAR 380/220 400/231 415/240 440/254 416/240 440/254 460/266 480/277

kVA BASE RATING FOR REACTANCE VALUES 1845 1900 1900 1865 2070 2210 2255 2300

Xd DIR. AXIS SYNCHRONOUS 3.18 2.96 2.75 2.40 3.84 3.67 3.42 3.21

X'd DIR. AXIS TRANSIENT 0.19 0.18 0.17 0.15 0.23 0.22 0.21 0.19

X''d DIR. AXIS SUBTRANSIENT 0.14 0.13 0.12 0.11 0.17 0.16 0.15 0.14

Xq QUAD. AXIS REACTANCE 2.04 1.90 1.76 1.54 2.47 2.36 2.20 2.06

X''q QUAD. AXIS SUBTRANSIENT 0.29 0.27 0.25 0.22 0.35 0.33 0.31 0.29

XL LEAKAGE REACTANCE 0.04 0.03 0.03 0.03 0.04 0.04 0.04 0.04

X2 NEGATIVE SEQUENCE 0.20 0.19 0.17 0.15 0.24 0.23 0.22 0.20

X0 ZERO SEQUENCE 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.03

REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED

T'd TRANSIENT TIME CONST. 0.149sT''d SUB-TRANSTIME CONST. 0.02sT'do O.C. FIELD TIME CONST. 2.46s

Ta ARMATURE TIME CONST. 0.02s

SHORT CIRCUIT RATIO 1/Xd

WINDING 312PI734E

2.69 m³/sec 5700 cfm 3.45 m³/sec 7300 cfm

50 Hz

THF<2%

60 Hz

TIF<50

3506 kg

44.4891 kgm2

216 x 105 x 154(cm) 216 x 105 x 154(cm)

45.49 kgm2

3629kg 3575kg

1747 kg

3556 kg

1747 kg

1432 kg1494 kg

0.8

IP23

CLASS H

REFER TO SHORT CIRCUIT DECREMENT CURVES (page 7)

17.5 Ohms at 22°C

0.063 Ohms PER PHASE AT 22°C

DOUBLE LAYER LAP

2.17 Ohms at 22°C

0.00093 Ohms PER PHASE AT 22°C STAR CONNECTED

6

TWO THIRDS

3

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Winding 312PI734E

THREE PHASE EFFICIENCY CURVES

50Hz

4

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Winding 312PI734E

THREE PHASE EFFICIENCY CURVES

60Hz

5

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PI734EWinding 312

Locked Rotor Motor Starting Curve

0

5

10

15

20

25

30

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000LOCKED ROTOR kVA

PER

CEN

T TR

AN

SIEN

T VO

LTA

GE

DIP

.

380V 416V 440V 460V 480V

0

5

10

15

20

25

30

0 500 1000 1500 2000 2500 3000 3500 4000 4500LOCKED ROTOR kVA

PER

CEN

T TR

AN

SIEN

T VO

LTA

GE

DIP

.

346V 380V 400V 415V 440V 50Hz

60Hz

6

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3-phase 2-phase L-L 1-phase L-NVoltage Factor Voltage Factor x 1.00 x 0.87 x 1.30

380v x 1.00 416v x 1.00 x 1.00 x 1.80 x 3.20400v x 1.05 440v x 1.06 x 1.00 x 1.50 x 2.50415v x 1.09 460v x 1.10 10 sec. 5 sec. 2 sec.440v x 1.16 480v x 1.15

The sustained current value is constant irrespectiveof voltage level

Three-phase Short Circuit Decrement Curve. No-load Excitation at Rated SpeedBased on star (wye) connection.

Max. sustained durationAll other times are unchanged

Instantaneous

SustainedMinimum

50Hz 60Hz

PI734E

Sustained Short Circuit = 6,250 Amps

Sustained Short Circuit = 7,500 AmpsNote 1The following multiplication factors should beused to adjust the values from curve betweentime 0.001 seconds and the minimum currentpoint in respect of nominal operating voltage :

Note 2The following multiplication factor should be used to convert thevalues calculated in accordance with NOTE 1 to those applicableto the various types of short circuit :

Note 3Curves are drawn for Star (Wye) connected machines.

50Hz

60Hz

1000

10000

100000

0.001 0.01 0.1 1 10TIME (secs)

CURR

ENT

(Am

ps)

SYMMETRICAL

ASYMMETRICAL

1000

10000

100000

0.001 0.01 0.1 1 10TIME (secs)

CURR

ENT

(Am

ps)

SYMMETRICAL

ASYMMETRICAL

7

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Class - Temp Rise

Star (V) 380 400 415 440 380 400 415 440 380 400 415 440 380 400 415 440

kVA 1715 1770 1770 1735 1845 1900 1900 1865 1920 1980 1980 1940 1975 2035 2035 1995

kW 1372 1416 1416 1388 1476 1520 1520 1492 1536 1584 1584 1552 1580 1628 1628 1596

Efficiency (%) 95.9 96.0 96.1 96.3 95.7 95.8 96.0 96.1 95.6 95.7 95.8 96.1 95.5 95.6 95.8 96.0

kW Input 1431 1475 1473 1441 1542 1587 1583 1553 1607 1655 1653 1615 1654 1703 1699 1663

Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480

kVA 1935 2055 2100 2140 2070 2210 2255 2300 2155 2300 2345 2395 2215 2365 2415 2465

kW 1548 1644 1680 1712 1656 1768 1804 1840 1724 1840 1876 1916 1772 1892 1932 1972

Efficiency (%) 95.8 95.9 96.0 96.1 95.7 95.8 95.9 95.9 95.6 95.7 95.8 95.9 95.5 95.6 95.7 95.8

kW Input 1616 1714 1750 1781 1730 1846 1881 1919 1803 1923 1958 1998 1855 1979 2019 2058

DIMENSIONS

PI734E

Cont. F - 105/40°C Cont. H - 125/40°C Standby - 150/40°C Standby - 163/27°C

Winding 312 / 0.8 Power Factor

RATINGS

50Hz

60Hz

8

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PI7E-312-TD-EN-SG-A

Head Office Address:Barnack Road, StamfordLincolnshire, PE9 2NB

United KingdomTel: +44 (0) 1780 484000Fax: +44 (0) 1780 484100

www.cumminsgeneratortechnologies.com

Copyright 2010, Cummins Generator Technologies Ltd, All Rights ReservedStamford and AvK are registered trade marks of Cummins Generator Technologies Ltd

Cummins and the Cummins logo are registered trade marks of Cummins Inc.

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PI734F - Winding 312

Technical Data Sheet

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PI734FSPECIFICATIONS & OPTIONS

STANDARDSStamford industrial generators meet the requirements of BS EN 60034 and the relevant sections of other national and international standards such as BS5000, VDE 0530, NEMA MG1-32, IEC60034, CSA C22.2-100, AS1359.Other standards and certifications can be considered on request.

DESCRIPTIONThe STAMFORD PI range of synchronous ac generators are brushless with a rotating field. They are separately excited by the STAMFORD Permanent Magnet Generator (PMG). This is a shaft mounted, high frequency, pilot exciter which provides a constant supply of clean power via the Automatic Voltage Regulator (AVR) to the main exciter. The main exciter output is fed to the main rotor, through a full wave bridge rectifier, protected by surge suppression. VOLTAGE REGULATORSThe PI range generators, complete with a PMG, are available with one of two AVRs. Each AVR has soft start voltage build up and built in protection against sustained over-excitation, which will de-excite the generator after a minimum of 8 seconds. Underspeed protection (UFRO) is also provided on both AVRs. The UFRO will reduce the generator output voltage proportional to the speed of the generator below a pre-settable level.

The MX341 AVR is two phase sensed with a voltage regulation of ± 1 %. (see the note on regulation).

The MX321 AVR is 3 phase rms sensed with a voltage regulation of 0.5% rms (see the note on regulation). The UFRO circuit has adjustable slope and dwell for controlled recovery from step loads. An over voltage protection circuit will shutdown the output device of the AVR, it can also trip an optional excitation circuit breaker if required. As an option, short circuit current limiting is available with the addition of current transformers.

Both the MX341 and the MX321 need a generator mounted current transformer to provide quadrature droop characteristics for load sharing during parallel operation. Provision is also made for the connection of the STAMFORD power factor controller, for embedded applications, and a remote voltage trimmer.

WINDINGS & ELECTRICAL PERFORMANCEAll generator stators are wound to 2/3 pitch. This eliminates triplen (3rd, 9th, 15th …) harmonics on the voltage waveform and is found to be the optimum design for trouble-free supply of non-linear loads. The 2/3 pitch design avoids excessive neutral currents sometimes seen with higher winding pitches. A fully connected damper winding reduces oscillations during paralleling. This winding, with the 2/3 pitch and carefully selected pole and tooth designs, ensures very low levels of voltage waveform distortion.

TERMINALS & TERMINAL BOXStandard generators feature a main stator with 6 ends brought out to the terminals, which are mounted on the frame at the non-drive end of the generator. A sheet steel terminal box contains the AVR and provides ample space for the customers' wiring and gland arrangements. It has removable panels for easy access.

SHAFT & KEYSAll generator rotors are dynamically balanced to better than BS6861:Part 1 Grade 2.5 for minimum vibration in operation. Two bearing generators are balanced with a half key.

INSULATION/IMPREGNATIONThe insulation system is class 'H', and meets the requirements of UL1446.All wound components are impregnated with materials and processes designed specifically to provide the high build required for static windings and the high mechanical strength required for rotating components.

QUALITY ASSURANCEGenerators are manufactured using production procedures having a quality assurance level to BS EN ISO 9001.

NOTE ON REGULATIONThe stated voltage regulation may not be maintained in the presence of certain radio transmitted signals. Any change in performance will fall within the limits of Criteria 'B' of EN 61000-6-2:2001. At no time will the steady-state voltage regulation exceed 2%.

DE RATESAll values tabulated on page 8 are subject to the following reductions

5% when air inlet filters are fitted.10% when IP44 Filters are fitted.3% for every 500 metres by which the operating altitude exceeds 1000 metres above mean sea level.3% for every 5°C by which the operational ambient temperature exceeds 40°C. Note: Requirement for operating in an ambient temperature exceeding 60°C must be referred to the factory.

Note: Continuous development of our products entitles us to change specification details without notice, therefore they must not be regarded as binding.

Front cover drawing is typical of the product range.

2

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CONTROL SYSTEM SEPARATELY EXCITED BY P.M.G.

A.V.R. MX341 MX321

VOLTAGE REGULATION ± 1% ± 0.5 % With 4% ENGINE GOVERNING

SUSTAINED SHORT CIRCUIT

INSULATION SYSTEM

PROTECTION

RATED POWER FACTOR

STATOR WINDING

WINDING PITCH

WINDING LEADS

MAIN STATOR RESISTANCE

MAIN ROTOR RESISTANCE

EXCITER STATOR RESISTANCE

EXCITER ROTOR RESISTANCE

R.F.I. SUPPRESSION BS EN 61000-6-2 & BS EN 61000-6-4,VDE 0875G, VDE 0875N. refer to factory for others

WAVEFORM DISTORTION NO LOAD < 1.5% NON-DISTORTING BALANCED LINEAR LOAD < 5.0%

MAXIMUM OVERSPEED 2250 Rev/Min

BEARING DRIVE END BALL. 6232 C3

BEARING NON-DRIVE END BALL. 6319 C3

1 BEARING 2 BEARING

WEIGHT COMP. GENERATOR

WEIGHT WOUND STATOR

WEIGHT WOUND ROTOR

WR² INERTIA

SHIPPING WEIGHTS in a crate

PACKING CRATE SIZE

TELEPHONE INTERFERENCE

COOLING AIR

VOLTAGE STAR 380/220 400/231 415/240 440/254 416/240 440/254 460/266 480/277

kVA BASE RATING FOR REACTANCE VALUES 2020 2080 2080 2040 2345 2500 2550 2600

Xd DIR. AXIS SYNCHRONOUS 2.93 2.73 2.53 2.21 3.55 3.38 3.16 2.96

X'd DIR. AXIS TRANSIENT 0.18 0.17 0.15 0.13 0.21 0.20 0.19 0.18

X''d DIR. AXIS SUBTRANSIENT 0.13 0.12 0.11 0.10 0.16 0.15 0.14 0.13

Xq QUAD. AXIS REACTANCE 1.89 1.75 1.63 1.42 2.28 2.18 2.03 1.90

X''q QUAD. AXIS SUBTRANSIENT 0.26 0.25 0.23 0.20 0.32 0.31 0.29 0.27

XL LEAKAGE REACTANCE 0.03 0.03 0.03 0.03 0.04 0.04 0.04 0.03

X2 NEGATIVE SEQUENCE 0.19 0.17 0.16 0.14 0.23 0.22 0.20 0.19

X0 ZERO SEQUENCE 0.02 0.02 0.02 0.02 0.03 0.03 0.02 0.02

REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED

T'd TRANSIENT TIME CONST. 0.154sT''d SUB-TRANSTIME CONST. 0.02sT'do O.C. FIELD TIME CONST. 2.54s

Ta ARMATURE TIME CONST. 0.02s

SHORT CIRCUIT RATIO 1/Xd

REFER TO SHORT CIRCUIT DECREMENT CURVES (page 7)

WINDING 312

DOUBLE LAYER LAP

2.31 Ohms at 22°C

0.8

IP23

CLASS H

0.00076 Ohms PER PHASE AT 22°C STAR CONNECTED

6

TWO THIRDS

PI734F

2.69 m³/sec 5700 cfm 3.45 m³/sec 7300 cfm

50 Hz

THF<2%

60 Hz

TIF<50

3807 kg

48.424 kgm2

216 x 105 x 154(cm)

1565 kg1609 kg

216 x 105 x 154(cm)

49.3409 kgm2

3913kg 3876kg

1908 kg

3840 kg

1908 kg

17.5 Ohms at 22°C

0.063 Ohms PER PHASE AT 22°C

3

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Winding 312PI734F

THREE PHASE EFFICIENCY CURVES

50Hz

4

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Winding 312PI734F

THREE PHASE EFFICIENCY CURVES

60Hz

5

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PI734FWinding 312

Locked Rotor Motor Starting Curve

0

5

10

15

20

25

30

0 1000 2000 3000 4000 5000 6000 7000LOCKED ROTOR kVA

PER

CEN

T TR

AN

SIEN

T VO

LTA

GE

DIP

.

380V 416V 440V 460V 480V

0

5

10

15

20

25

30

0 1000 2000 3000 4000 5000 6000LOCKED ROTOR kVA

PER

CEN

T TR

AN

SIEN

T VO

LTA

GE

DIP

.

346V 380V 400V 415V 440V 50Hz

60Hz

6

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3-phase 2-phase L-L 1-phase L-NVoltage Factor Voltage Factor x 1.00 x 0.87 x 1.30

380v x 1.00 416v x 1.00 x 1.00 x 1.80 x 3.20400v x 1.05 440v x 1.06 x 1.00 x 1.50 x 2.50415v x 1.09 460v x 1.10 10 sec. 5 sec. 2 sec.440v x 1.16 480v x 1.15

Minimum

Winding 312

50Hz 60Hz

PI734F

The sustained current value is constant irrespectiveof voltage level

Three-phase Short Circuit Decrement Curve. No-load Excitation at Rated SpeedBased on star (wye) connection.

Max. sustained durationAll other times are unchanged

Instantaneous

Sustained

Sustained Short Circuit = 6,850 Amps

Sustained Short Circuit = 8,900 AmpsNote 1The following multiplication factors should beused to adjust the values from curve betweentime 0.001 seconds and the minimum currentpoint in respect of nominal operating voltage :

Note 2The following multiplication factor should be used to convert thevalues calculated in accordance with NOTE 1 to those applicableto the various types of short circuit :

Note 3Curves are drawn for Star (Wye) connected machines.

50Hz

60Hz

1000

10000

100000

0.001 0.01 0.1 1 10TIME (secs)

CURR

ENT

(Am

ps)

SYMMETRICAL

ASYMMETRICAL

1000

10000

100000

0.001 0.01 0.1 1 10TIME (secs)

CURR

ENT

(Am

ps)

SYMMETRICAL

ASYMMETRICAL

7

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Class - Temp Rise

Star (V) 380 400 415 440 380 400 415 440 380 400 415 440 380 400 415 440

kVA 1880 1935 1935 1900 2020 2080 2080 2040 2105 2170 2170 2125 2165 2250 2250 2185

kW 1504 1548 1548 1520 1616 1664 1664 1632 1684 1736 1736 1700 1732 1800 1800 1748

Efficiency (%) 96.1 96.2 96.3 96.4 96.0 96.0 96.1 96.3 95.9 95.9 96.0 96.2 95.8 95.8 96.0 96.2

kW Input 1565 1609 1607 1577 1683 1733 1732 1695 1756 1810 1808 1767 1808 1878 1876 1817

Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480

kVA 2190 2325 2370 2420 2345 2500 2550 2600 2435 2600 2650 2705 2505 2675 2730 2785

kW 1752 1860 1896 1936 1876 2000 2040 2080 1948 2080 2120 2164 2004 2140 2184 2228

Efficiency (%) 96.0 96.1 96.1 96.2 95.9 95.9 96.0 96.1 95.8 95.8 95.9 96.0 95.7 95.8 95.9 95.9

kW Input 1825 1935 1973 2012 1957 2086 2125 2164 2033 2171 2211 2254 2094 2234 2277 2323

DIMENSIONS

PI734F

Cont. F - 105/40°C Cont. H - 125/40°C Standby - 150/40°C Standby - 163/27°C

Winding 312 / 0.8 Power Factor

RATINGS

50Hz

60Hz

8

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PI7F-312-TD-EN-SG-A

Head Office Address:Barnack Road, StamfordLincolnshire, PE9 2NB

United KingdomTel: +44 (0) 1780 484000Fax: +44 (0) 1780 484100

www.cumminsgeneratortechnologies.com

Copyright 2010, Cummins Generator Technologies Ltd, All Rights ReservedStamford and AvK are registered trade marks of Cummins Generator Technologies Ltd

Cummins and the Cummins logo are registered trade marks of Cummins Inc.

NITIN

CORPORATIO

N