PI736F - Technical Data Sheet
PI736F
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 of 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 Generators are manufactured using production procedures
protection circuit will shutdown the output device of the having a quality assurance level to
AVR, it can also trip an optional excitation circuit breaker BS EN ISO 9001.
if required. 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
PI736F
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 0.0014 Ohms PER PHASE AT 22°C STAR CONNECTED
MAIN ROTOR RESISTANCE 3.25 Ohms at 22°C
EXCITER STATOR RESISTANCE 20 Ohms at 22°C
EXCITER ROTOR RESISTANCE 0.14 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 1500 Rev/Min
BEARING DRIVE END BALL. 6232 C3
BEARING NON-DRIVE END BALL. 6319 C3
1 BEARING 2 BEARING
WEIGHT COMP. GENERATOR 3710 kg 3677 kg
WEIGHT WOUND STATOR 1590 kg 1590 kg
WEIGHT WOUND ROTOR 1813 kg 1769 kg
2
WR² INERTIA 64.5476 kgm 63.6307 kgm2
SHIPPING WEIGHTS in a crate 3983kg 4022kg
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 1.79 m³/sec 3793 cfm 2.3 m³/sec 4874 cfm
VOLTAGE STAR 380/220 400/231 415/240 440/254 416/240 440/254 460/266 480/277
kVA BASE RATING FOR REACTANCE
1300 1300 1300 1300 1500 1625 1625 1625
VALUES
Xd DIR. AXIS SYNCHRONOUS 2.50 2.26 2.10 1.87 2.99 2.89 2.65 2.43
X'd DIR. AXIS TRANSIENT 0.19 0.17 0.16 0.14 0.22 0.21 0.20 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 1.62 1.46 1.36 1.21 1.93 1.87 1.71 1.57
X''q QUAD. AXIS SUBTRANSIENT 0.41 0.37 0.34 0.30 0.49 0.48 0.44 0.40
XL LEAKAGE REACTANCE 0.04 0.04 0.04 0.03 0.05 0.05 0.04 0.04
X2 NEGATIVE SEQUENCE 0.23 0.21 0.20 0.17 0.28 0.27 0.25 0.23
X0 ZERO SEQUENCE 0.03 0.03 0.03 0.02 0.04 0.04 0.03 0.03
REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED
T'd TRANSIENT TIME CONST. 0.175s
T''d SUB-TRANSTIME CONST. 0.016s
T'do O.C. FIELD TIME CONST. 2.34s
Ta ARMATURE TIME CONST. 0.0198s
SHORT CIRCUIT RATIO 1/Xd
3
PI736F
50 Winding 312
Hz THREE PHASE EFFICIENCY CURVES
4
PI736F
Winding 312
60
THREE PHASE EFFICIENCY CURVES
Hz
5
PI736F
Winding 312
Locked Rotor Motor Starting Curve
50
Hz 346V 380V 400V 415V 440V
30
25
PER CENT TRANSIENT VOLTAGE DIP
20
15
10
0
0 500 1000 1500 2000 2500 3000
LOCKED ROTOR kVA
60
Hz 380V 416V 440V 460V 480V
30
25
PER CENT TRANSIENT VOLTAGE DIP
20
15
10
0
0 500 1000 1500 2000 2500 3000 3500
LOCKED ROTOR kVA
6
PI736F
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 = 4,100 Amps
60 100000
Hz
SYMMETRICAL
ASYMMETRICAL
CURRENT (Am ps)
10000
1000
0.001 0.01 0.1 1 10
TIME (secs)
Sustained Short Circuit = 5,600 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
PI736F
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 1200 1200 1200 1200 1300 1300 1300 1300 1355 1355 1355 1355 1390 1390 1390 1390
kW 960 960 960 960 1040 1040 1040 1040 1084 1084 1084 1084 1112 1112 1112 1112
Efficiency (%) 96.2 96.3 96.4 96.6 96.0 96.2 96.3 96.5 96.0 96.2 96.3 96.4 95.9 96.1 96.2 96.4
kW Input 998 997 996 994 1083 1081 1080 1078 1129 1127 1126 1124 1160 1157 1156 1154
60Hz Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480
kVA 1375 1500 1500 1500 1500 1625 1625 1625 1560 1690 1690 1690 1605 1740 1740 1740
kW 1100 1200 1200 1200 1200 1300 1300 1300 1248 1352 1352 1352 1284 1392 1392 1392
Efficiency (%) 96.2 96.3 96.4 96.5 96.0 96.1 96.3 96.4 96.0 96.1 96.2 96.4 95.9 96.0 96.2 96.3
kW Input 1143 1246 1245 1244 1250 1353 1350 1349 1300 1407 1405 1402 1339 1450 1447 1445
DIMENSIONS
Barnack Road • Stamford • Lincolnshire • PE9 2NB
Tel: 00 44 (0)1780 484000 • Fax: 00 44 (0)1780 484100
© 2005 Newage International Limited.
Website: www.newage-avkseg.com
Reprinted with permission of N.I. only.
Printed in England. TD_PI736F.GB_06.05_02_GB
