PI734G - Technical Data Sheet
PI734G
SPECIFICATIONS & OPTIONS
STANDARDS WINDINGS & ELECTRICAL PERFORMANCE
Newage Stamford industrial generators meet the All generator stators are wound to 2/3 pitch. This
requirements of BS EN 60034 and the relevant sections eliminates triplen (3rd, 9th, 15th …) harmonics on the
of other national and international standards such as voltage waveform and is found to be the optimum design
BS5000, VDE 0530, NEMA MG1-32, IEC60034, CSA for trouble-free supply of non-linear loads. The 2/3 pitch
C22.2-100, AS1359. design avoids excessive neutral currents sometimes seen
Other standards and certifications can be considered on with higher winding pitches. A fully connected damper
request. winding reduces oscillations during paralleling. This
winding, with the 2/3 pitch and carefully selected pole and
DESCRIPTION tooth designs, ensures very low levels of voltage waveform
distortion.
The STAMFORD PI range of synchronous ac generators
are brushless with a rotating field. They are separately TERMINALS & TERMINAL BOX
excited by the STAMFORD Permanent Magnet
Generator (PMG). This is a shaft mounted, high Standard generators feature a main stator with 6 ends
frequency, pilot exciter which provides a constant supply brought out to the terminals, which are mounted on the
of clean power via the Automatic Voltage Regulator (AVR) frame at the non-drive end of the generator. A sheet steel
to the main exciter. The main exciter output is fed to the terminal box contains the AVR and provides ample space
main rotor, through a full wave bridge rectifier, protected for the customers' wiring and gland arrangements. It has
by surge suppression. removable panels for easy access.
VOLTAGE REGULATORS SHAFT & KEYS
The PI range generators, complete with a PMG, are All generator rotors are dynamically balanced to better
available with one of two AVRs. Each AVR has soft start than BS6861:Part 1 Grade 2.5 for minimum vibration in
voltage build up and built in protection against sustained operation. Two bearing generators are balanced with a
over-excitation, which will de-excite the generator after a half key.
minimum of 8 seconds.
Underspeed protection (UFRO) is also provided on both INSULATION/IMPREGNATION
AVRs. The UFRO will reduce the generator output voltage
proportional to the speed of the generator below a pre- The insulation system is class 'H', and meets the
settable level. requirements of UL1446.
All wound components are impregnated with materials and
The MX341 AVR is two phase sensed with a voltage processes designed specifically to provide the high build
regulation of ± 1 %. (see the note on regulation). required for static windings and the high mechanical
strength required for rotating components.
The MX321 AVR is 3 phase rms sensed with a voltage
regulation of 0.5% rms (see the note on regulation). The QUALITY ASSURANCE
UFRO circuit has adjustable slope and dwell for controlled
recovery from step loads. An over voltage protection Generators are manufactured using production procedures
circuit will shutdown the output device of the AVR, it can having a quality assurance level to
also trip an optional excitation circuit breaker if required. BS EN ISO 9001.
As an option, short circuit current limiting is available with
the addition of current transformers. NOTE ON REGULATION
The stated voltage regulation may not be maintained in the
Both the MX341 and the MX321 need a generator presence of certain radio transmitted signals. Any change
mounted current transformer to provide quadrature droop in performance will fall within the limits of Criteria 'B' of EN
characteristics for load sharing during parallel operation. 61000-6-2:2001. At no time will the steady-state voltage
Provision is also made for the connection of the regulation exceed 2%.
STAMFORD power factor controller, for embedded
applications, and a remote voltage trimmer. 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
PI734G
WINDING 312
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 REFER TO SHORT CIRCUIT DECREMENT CURVES (page 7)
INSULATION SYSTEM CLASS H
PROTECTION IP23
RATED POWER FACTOR 0.8
STATOR WINDING DOUBLE LAYER LAP
WINDING PITCH TWO THIRDS
WINDING LEADS 6
MAIN STATOR RESISTANCE 0.0008 Ohms PER PHASE AT 22°C STAR CONNECTED
MAIN ROTOR RESISTANCE 2.42 Ohms at 22°C
EXCITER STATOR RESISTANCE 16 Ohms at 22°C
EXCITER ROTOR RESISTANCE 0.043 Ohms PER PHASE AT 22°C
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 4054 kg 4022 kg
WEIGHT WOUND STATOR 2015 kg 2015 kg
WEIGHT WOUND ROTOR 1697 kg 1654 kg
2
WR² INERTIA 52.2511 kgm 51.3341 kgm2
SHIPPING WEIGHTS in a crate 4127kg 4091kg
PACKING CRATE SIZE 216 x 105 x 154(cm) 216 x 105 x 154(cm)
50 Hz 60 Hz
TELEPHONE INTERFERENCE THF<2% TIF<50
COOLING AIR 2.69 m³/sec 5700 cfm 3.45 m³/sec 7300 cfm
VOLTAGE STAR 380/220 400/231 415/240 440/254 416/240 440/254 460/266 480/277
kVA BASE RATING FOR REACTANCE
2135 2200 2200 2160 2475 2640 2695 2750
VALUES
Xd DIR. AXIS SYNCHRONOUS 3.71 3.45 3.20 2.80 4.48 4.27 3.99 3.74
X'd DIR. AXIS TRANSIENT 0.21 0.19 0.18 0.15 0.25 0.24 0.22 0.21
X''d DIR. AXIS SUBTRANSIENT 0.15 0.14 0.13 0.11 0.18 0.17 0.16 0.15
Xq QUAD. AXIS REACTANCE 2.38 2.22 2.06 1.80 2.88 2.75 2.57 2.41
X''q QUAD. AXIS SUBTRANSIENT 0.28 0.26 0.24 0.21 0.34 0.32 0.30 0.28
XL LEAKAGE REACTANCE 0.03 0.03 0.03 0.03 0.04 0.04 0.04 0.04
X2 NEGATIVE SEQUENCE 0.20 0.19 0.18 0.15 0.25 0.23 0.22 0.21
X0 ZERO SEQUENCE 0.04 0.04 0.03 0.03 0.05 0.04 0.04 0.04
REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED
T'd TRANSIENT TIME CONST. 0.16s
T''d SUB-TRANSTIME CONST. 0.01s
T'do O.C. FIELD TIME CONST. 2.89s
Ta ARMATURE TIME CONST. 0.02s
SHORT CIRCUIT RATIO 1/Xd
3
PI734G
50 Winding 312
Hz THREE PHASE EFFICIENCY CURVES
4
PI734G
Winding 312
60
THREE PHASE EFFICIENCY CURVES
Hz
5
PI734G
Winding 312
Locked Rotor Motor Starting Curve
50
Hz 346V 380V 400V 415V 440V
30
25
.
20
PER CENT TRANSIENT VOLTAGE DIP
15
10
0
0 500 1000 1500 2000 2500 3000 3500 4000
LOCKED ROTOR kVA
60
30
Hz 380V 416V 440V 460V 480V
25
.
20
PER CENT TRANSIENT VOLTAGE DIP
15
10
0
0 500 1000 1500 2000 2500 3000 3500 4000
LOCKED ROTOR kVA
6
PI734G
Three-phase Short Circuit Decrement Curve. No-load Excitation at Rated Speed
Based on star (wye) connection.
50
Hz
100000
SYMMETRICAL
ASYMMETRICAL
CURRENT (Am ps)
10000
1000
0.001 0.01 0.1 1 10
TIME (secs)
Sustained Short Circuit = 8,150 Amps
60 100000
Hz
SYMMETRICAL
ASYMMETRICAL
CURRENT (Am ps)
10000
1000
0.001 0.01 0.1 1 10
TIME (secs)
Sustained Short Circuit = 9,500 Amps
Note 1 Note 2
The following multiplication factors should be The following multiplication factor should be used to convert the
used to adjust the values from curve between values calculated in accordance with NOTE 1 to those applicable
time 0.001 seconds and the minimum current to the various types of short circuit :
point in respect of nominal operating voltage :
50Hz 60Hz 3-phase 2-phase L-L 1-phase L-N
Voltage Factor Voltage Factor Instantaneous x 1.00 x 0.87 x 1.30
380v x 1.00 416v x 1.00 Minimum x 1.00 x 1.80 x 3.20
400v x 1.05 440v x 1.06 Sustained x 1.00 x 1.50 x 2.50
415v x 1.09 460v x 1.10 Max. sustained duration 10 sec. 5 sec. 2 sec.
440v x 1.16 480v x 1.15 All other times are unchanged
The sustained current value is constant irrespective
of voltage level
Note 3
Curves are drawn for Star (Wye) connected machines.
7
PI734G
Winding 312 / 0.8 Power Factor
RATINGS
Class - Temp Rise Cont. F - 105/40°C Cont. H - 125/40°C Standby - 150/40°C Standby - 163/27°C
50Hz Star (V) 380 400 415 440 380 400 415 440 380 400 415 440 380 400 415 440
kVA 1985 2050 2050 2005 2135 2200 2200 2160 2225 2295 2295 2250 2290 2360 2360 2310
kW 1588 1640 1640 1604 1708 1760 1760 1728 1780 1836 1836 1800 1832 1888 1888 1848
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 95.9 96.0 96.1
kW Input 1652 1705 1703 1664 1779 1833 1831 1794 1856 1914 1913 1871 1912 1969 1967 1923
60Hz Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480
kVA 2305 2455 2510 2560 2475 2640 2695 2750 2575 2750 2805 2860 2650 2825 2885 2945
kW 1844 1964 2008 2048 1980 2112 2156 2200 2060 2200 2244 2288 2120 2260 2308 2356
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 95.7 95.8 95.9
kW Input 1921 2044 2089 2129 2065 2202 2246 2289 2150 2296 2340 2383 2215 2362 2409 2457
DIMENSIONS
Barnack Road • Stamford • Lincolnshire • PE9 2NB
Tel: 00 44 (0)1780 484000 • Fax: 00 44 (0)1780 484100
© 2004 Newage International Limited. Website: www.newage-avkseg.com
Reprinted with permission of N.I. only.
Printed in England. TD_PI734G.GB_05.04_02_GB
