PI734D - Technical Data Sheet
PI734D
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 frequency, pilot Standard generators feature a main stator with 6 ends
exciter which provides a constant supply of clean power brought out to the terminals, which are mounted on the
via the Automatic Voltage Regulator (AVR) to the main frame at the non-drive end of the generator. A sheet steel
exciter. The main exciter output is fed to the main rotor, terminal box contains the AVR and provides ample space
through a full wave bridge rectifier, protected by surge for the customers' wiring and gland arrangements. It has
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
Both the MX341 and the MX321 need a generator The stated voltage regulation may not be maintained in the
mounted current transformer to provide quadrature droop presence of certain radio transmitted signals. Any change
characteristics for load sharing during parallel operation. in performance will fall within the limits of Criteria 'B' of EN
Provision is also made for the connection of the 61000-6-2:2001. At no time will the steady-state voltage
STAMFORD power factor controller, for embedded regulation exceed 2%.
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
PI734D
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 0.00114 Ohms PER PHASE AT 22C STAR CONNECTED
MAIN ROTOR RESISTANCE 1.98 Ohms at 22C
EXCITER STATOR RESISTANCE 17.5 Ohms at 22C
EXCITER ROTOR RESISTANCE 0.063 Ohms PER PHASE AT 22C
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 3318 kg 3267 kg
WEIGHT WOUND STATOR 1619 kg 1619 kg
WEIGHT WOUND ROTOR 1383 kg 1321 kg
2
WR INERTIA 41.2206 kgm 40.2197 kgm2
SHIPPING WEIGHTS in a crate 3391kg 3336kg
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 m/sec 5700 cfm 3.45 m/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
1615 1650 1650 1620 1815 1935 1975 2015
VALUES
Xd DIR. AXIS SYNCHRONOUS 3.12 2.88 2.67 2.33 3.75 3.57 3.33 3.12
X'd DIR. AXIS TRANSIENT 0.19 0.18 0.16 0.14 0.23 0.22 0.20 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 2.01 1.85 1.72 1.50 2.41 2.30 2.15 2.01
X''q QUAD. AXIS SUBTRANSIENT 0.28 0.26 0.24 0.21 0.34 0.32 0.30 0.28
XL LEAKAGE REACTANCE 0.04 0.03 0.03 0.03 0.04 0.04 0.04 0.04
X2 NEGATIVE SEQUENCE 0.20 0.18 0.17 0.15 0.24 0.23 0.21 0.20
X0 ZERO SEQUENCE 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.02
REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED
T'd TRANSIENT TIME CONST. 0.137s
T''d SUB-TRANSTIME CONST. 0.01s
T'do O.C. FIELD TIME CONST. 2.25s
Ta ARMATURE TIME CONST. 0.02s
SHORT CIRCUIT RATIO 1/Xd
3
PI734D
50 Winding 312
Hz THREE PHASE EFFICIENCY CURVES
4
PI734D
60 Winding 312
Hz THREE PHASE EFFICIENCY CURVES
5
PI734D
Winding 312
Locked Rotor Motor Starting Curve
50
30
Hz 346V 380V 400V 415V 440V
25
.
20
PER CENT TRANSIENT VOLTAGE DIP
15
10
0
0 500 1000 1500 2000 2500 3000 3500 4000
LOCKED ROTOR kVA
60
Hz 380V 416V 440V 460V 480V
30
25
.
20
PER CENT TRANSIENT VOLTAGE DIP
15
10
0
0 500 1000 1500 2000 2500 3000 3500 4000 4500
LOCKED ROTOR kVA
6
PI734D
Three-phase Short Circuit Decrement Curve. No-load Excitation at Rated Speed
Based on star (wye) connection.
50
Hz 100000
SYMMETRICAL
ASYMMETRICAL
CU RR E NT (Am p s)
10000
1000
0.001 0.01 0.1 1 10
TIME (secs)
Sustained Short Circuit = 5,750 Amps
60 100000
Hz
SYMMETRICAL
ASYMMETRICAL
CU RR E NT (Am p s)
10000
1000
0.001 0.01 0.1 1 10
TIME (secs)
Sustained Short Circuit = 6,500 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
PI734D
Winding 312 / 0.8 Power Factor
RATINGS
Class - Temp Rise Cont. F - 105/40C Cont. H - 125/40C Standby - 150/40C Standby - 163/27C
50Hz Star (V) 380 400 415 440 380 400 415 440 380 400 415 440 380 400 415 440
kVA 1500 1535 1535 1505 1615 1650 1650 1620 1675 1720 1720 1685 1715 1770 1770 1735
kW 1200 1228 1228 1204 1292 1320 1320 1296 1340 1376 1376 1348 1372 1416 1416 1388
Efficiency (%) 96.2 96.3 96.4 96.5 96.1 96.2 96.3 96.4 96.0 96.1 96.2 96.3 95.9 96.0 96.1 96.3
kW Input 1247 1275 1274 1248 1344 1372 1371 1344 1396 1432 1430 1400 1431 1475 1473 1441
60Hz Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480
kVA 1690 1800 1840 1875 1815 1935 1975 2015 1890 2015 2055 2100 1940 2070 2115 2160
kW 1352 1440 1472 1500 1452 1548 1580 1612 1512 1612 1644 1680 1552 1656 1692 1728
Efficiency (%) 96.2 96.2 96.3 96.4 96.1 96.1 96.2 96.3 96.0 96.0 96.1 96.2 95.9 96.0 96.1 96.1
kW Input 1405 1497 1529 1556 1511 1611 1642 1674 1575 1679 1711 1746 1618 1725 1761 1798
DIMENSIONS
Barnack Road Stamford Lincolnshire PE9 2NB
Tel: 00 44 (0)1780 484000 Fax: 00 44 (0)1780 484100
2006 TD_PI734D.GB_10.06_03_GB
