HV 804 T WDG 83 - Technical Data Sheet

FRAME HV 804 T
SPECIFICATIONS & OPTIONS
STANDARDS WINDINGS & ELECTRICAL PERFORMANCE

Cummins Generator Technologies industrial generators All generator stators are wound to 2/3 pitch. This
meet the requirements of BS EN 60034 and the relevant eliminates triplen (3rd, 9th, 15th …) harmonics on the
sections of other national and international standards such voltage waveform and is found to be the optimum design
as 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 P range generators complete with a PMG are All generator rotors are dynamically balanced to better than
available with one AVR. The AVR has soft start voltage BS6861:Part 1 Grade 2.5 for minimum vibration in
build up and built in protection against sustained over- operation. Two bearing generators are balanced with a half
excitation, which will de-excite the generator after a 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 'F'.
settable level. All wound components are impregnated with materials and
processes designed specifically to provide the high build
The MA330 AVR is 3 phase rms sensed with a voltage required for static windings and the high mechanical
regulation of 0.5% rms (see the note on regulation). The strength required for rotating components.
UFRO circuit has adjustable slope and dwell for controlled
recovery from step loads. An over voltage protection circuit QUALITY ASSURANCE
will shutdown the output device of the AVR, it can also trip
an optional excitation circuit breaker if required. As an Generators are manufactured using production procedures
option, short circuit current limiting is available with the having a quality assurance level to
addition of current transformers. BS EN ISO 9001.

The MA330 AVR needs a generator mounted current NOTE ON REGULATION

transformer to provide quadrature droop characteristics for The stated voltage regulation may not be maintained in the
load sharing during parallel operation. presence of certain radio transmitted signals. Any change
Provision is also made for the connection of the in performance will fall within the limits of Criteria 'B' of EN
STAMFORD power factor controller, for embedded 61000-6-2:2001. At no time will the steady-state voltage
applications, and a remote voltage trimmer. regulation exceed 2%.

NB 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
 FRAME HV 804 T
WINDING 83
RATINGS REFER TO SALES AND SERVICE BRIEFING
MAXIMUM ALTITUDE 1000 METRES ABOVE SEA LEVEL
MAXIMUM AMBIENT TEMPERATURE 40º C

CONTROL SYSTEM SERIES 3 SEPARATELY EXCITED BY P.M.G.

A.V.R. FULL WAVE RECTIFIED
VOLTAGE REGULATION ± 0.5% WITH 4% ENGINE GOVERNING
SUSTAINED SHORT CIRCUIT REFER TO SHORT CIRCUIT DECREMENT CURVES OF THIS SECTION

INSULATION SYSTEM CLASS F

PROTECTION IP23 STANDARD
RATED POWER FACTOR 0.8
STATOR WINDING DOUBLE LAYER LAP
WINDING PITCH 2/3
WINDING LEADS 6
R.F.I. SUPPRESSION BS EN 50081/2-1/2 VDE 0875G VDE 0875N For other standards apply to the factory
WAVEFORM DISTORTION NO LOAD < 1.5% NON-DISTORTING BALANCED LINEAR LOAD < 3.0%
MAXIMUM OVERSPEED 2250 Rev/Min
BEARING DRIVE END ISO 6232 C3
BEARING NON DRIVE END ISO 6324 C3
EFFICIENCY REFER TO EFFICIENCY CURVES OF THIS SECTION

FREQUENCY 50Hz
TELEPHONE INTERFERENCE THF< 2%
3
COOLING AIR 3.0 m /sec
VOLTAGE STAR (Y) 10500 11000
kVA BASE RATING FOR
2711 2840
REACTANCE VALUES
Xd DIRECT AXIS SYNCHRONOUS 2.462 2.350
X'd DIRECT AXIS TRANSIENT 0.205 0.195
X''d DIRECT AXIS SUB-TRANSIENT 0.152 0.145
Xq QUADRATURE AXIS REACTANCE 1.760 1.680
X''q QUAD. AXIS SUB-TRANSIENT 0.284 0.271
XL LEAKAGE REACTANCE 0.110 0.105
X2 NEGATIVE PHASE SEQUENCE 0.219 0.209
X0 ZERO PHASE SEQUENCE 0.035 0.033
REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED
T'd TRANSIENT TIME CONSTANT 0.205
T''d SUB-TRANSIENT TIME CONSTANT 0.016
T'do O.C. FIELD TIME CONSTANT 4.300
Ta ARMATURE TIME CONSTANT 0.067
SHORT CIRCUIT RATIO 1/Xd

STATOR WINDING RESISTANCE (L-N) 0.4020

ROTOR WINDING RESISTANCE 1.500
EXCITER STATOR FIELD RESISTANCE 17.50
EXCITER ROTOR RESISTANCE (L-L) 0.076
PMG STATOR RESISTANCE (L-L) 3.800
RESISTANCE VALUES ARE IN OHMS AT 20º C

NO LOAD EXCITATION VOLTAGE 15.0

FULL LOAD EXCITAION VOLTAGE 63.0

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

3
 FRAME HV 804 T WDG 83 50 Hz
THREE PHASE EFFICIENCY CURVES

10500 V
98.0

97.5

97.0 1.0

96.5 0.9

96.0 0.8
% P.F.
95.5

95.0 2711.0 kVA

94.5
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1

2711 kVA

11000 V
98.0

97.5

97.0 1.0

96.5 0.9

96.0 0.8
% P.F.
95.5

95.0

94.5
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1

2840 kVA

4
FRAME HV 804 T WDG 83 50Hz
FULL WAVE RECTIFIED AVR
LOCKED ROTOR MOTOR STARTING CURVE

X 10500V 11000V
30.0

25.0
PER CENT TRANSIENT VOLTAGE DIP

20.0

15.0

10.0

5.0

0.0
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
LOCKED ROTOR kVA

FRAME HV 804 T WDG 83 50Hz

Three Phase Short Circuit Decrement Curve

No- Load Excitation at Rated Speed
Based on series star (wye) connection

x NOTE 1
10000
THE FOLLOWING MULTIPLICATION FACTORS SHOULD BE USED TO ADJUST THE VALUES

FROM CURVES BETWEEN THE 0.001 SECONDS AND THE MINIMUM CURRENT POINT IN
SYMMETRIC
RESPECT OF NOMINAL OPERATING VOLTAGE

ASYMMETRICAL VOLTAGE FACTOR

10500V X 0.95
11000V X 1.00

THE SUSTAINED CURRENT VALUE IS CONSTANT IRRESPECTIVE OF VOLTAGE LEVEL

CURRENT (Amps)

1000
NOTE 2

THE FOLLOWING MULTIPLICATION FACTORS SHOULD BE USED TO CONVERT THE

VALUES CALCULATED IN ACCORDANCE WITH NOTE 1 TO THOSE APPLICABLE
TO THE VARIOUS TYPES OF SHORT CIRCUIT

3 PHASE 2 PHASE L-L 1 PHASE L-N

INSTANTANEOUS X 1.0 X 0.87 X 1.30

MINIMUM X 1.0 X 1.80 X 3.20
SUSTAINED X 1.0 X 1.50 X 2.50
MAX SUSTAINED DURATION 10 SEC 5 SEC 2 SEC
ALL OTHER TIMES ARE UNCHANGED

100
0.001 0.01 0.1 1 10
TIME (secs)
SUSTAINED SHORT CIRCUIT = 492 Amps

5
 FRAME HV 804 T
WINDING 83 0.8 Power Factor

RATINGS

Class - Temp Rise Cont. F - 105/40°C Class F Standby - 125/40°C Class F Standby - 138/27°C

50Hz Star (V) 10500 11000 10500 11000 10500 11000

kVA 2711 2840 2897 3035 3007 3150

kW 2169 2272 2318 2428 2406 2520

Efficiency (%) 96.1 96.2 96.0 96.1 96.0 96.2

kW Input 2256 2362 2414 2527 2507 2620

60Hz Star (V) N/A N/A N/A N/A N/A N/A

kVA N/A N/A N/A N/A N/A N/A

kW N/A N/A N/A N/A N/A N/A

Efficiency (%) N/A N/A N/A N/A N/A N/A

kW Input N/A N/A N/A N/A N/A N/A

TYPICAL DIMENSIONS - Further arrangements available - please refer to factory

Barnack Road • Stamford • Lincolnshire • PE9 2NB

Tel: 00 44 (0)1780 484000 • Fax: 00 44 (0)1780 484100

© 2009 TD_HV804T.83.GB_03.09_09_GB