UCI274H - Technical Data Sheet

UCI274H
SPECIFICATIONS & OPTIONS

STANDARDS MX321 AVR

Newage Stamford industrial generators meet the The most sophisticated of all our AVRs combines all the
requirements of BS EN 60034 and the relevant section features of the MX341 with, additionally, three-phase
of other international standards such as BS5000, VDE rms sensing, for improved regulation and performance.
0530, NEMA MG1-32, IEC34, CSA C22.2-100, AS1359. Over voltage protection is built-in and short circuit
Other standards and certifications can be considered on current level adjustments is an optional facility.
request.
WINDINGS & ELECTRICAL PERFORMANCE
VOLTAGE REGULATORS All generator stators are wound to 2/3 pitch. This
eliminates triplen (3rd, 9th, 15th …) harmonics on the
SX460 AVR - STANDARD voltage waveform and is found to be the optimum
With this self excited control system the main stator design for trouble-free supply of non-linear loads. The
supplies power via the Automatic Voltage Regulator 2/3 pitch design avoids excessive neutral currents
(AVR) to the exciter stator. The high efficiency sometimes seen with higher winding pitches, when in
semiconductors of the AVR ensure positive build-up parallel with the mains. A fully connected damper
from initial low levels of residual voltage. winding reduces oscillations during paralleling. This
The exciter rotor output is fed to the main rotor through winding, with the 2/3 pitch and carefully selected pole
a three phase full wave bridge rectifier. This rectifier is and tooth designs, ensures very low waveform
protected by a surge suppressor against surges caused, distortion.
for example, by short circuit.
TERMINALS & TERMINAL BOX
SX440 AVR Standard generators are 3-phase reconnectable with 12
With this self-excited system the main stator provides ends brought out to the terminals, which are mounted
power via the AVR to the exciter stator. The high on a cover at the non-drive end of the generator. A
efficiency semi-conductors of the AVR ensure positive sheet steel terminal box contains the AVR and provides
build-up from initial low levels of residual voltage. ample space for the customers' wiring and gland
The exciter rotor output is fed to the main rotor through arrangements. It has removable panels for easy
a three-phase full-wave bridge rectifier. The rectifier is access.
protected by a surge suppressor against surges caused,
for example, by short circuit or out-of-phase paralleling. SHAFT & KEYS
The SX440 will support a range of electronic All generator rotors are dynamically balanced to better
accessories, including a 'droop' Current Transformer than BS6861:Part 1 Grade 2.5 for minimum vibration in
(CT) to permit parallel operation with other ac operation. Two bearing generators are balanced with a
generators. half key.
If 3-phase sensing is required with the self-excited
system, the SX421 AVR must be used. INSULATION/IMPREGNATION
The insulation system is class 'H'.
SX421AVR All wound components are impregnated with materials
This AVR also operates in a self-excited system. It and processes designed specifically to provide the high
combines all the features of the SX440 with, build required for static windings and the high
additionally, three-phase rms sensing for improved mechanical strength required for rotating components.
regulation and performance. Over voltage protection is
provided via a separate circuit breaker. An engine relief QUALITY ASSURANCE
load acceptance feature is built in as standard. Generators are manufactured using production
procedures having a quality assurance level to BS EN
MX341 AVR ISO 9001.
This sophisticated AVR is incorporated into the
Stamford Permanent Magnet Generator (PMG) control The stated voltage regulation may not be maintained in
system. the presence of certain radio transmitted signals. Any
The PMG provides power via the AVR to the main change in performance will fall within the limits of
exciter, giving a source of constant excitation power Criteria 'B' of EN 61000-6-2:2001. At no time will the
independent of generator output. The main exciter steady-state voltage regulation exceed 2%.
output is then fed to the main rotor, through a full wave
bridge, protected by a surge suppressor. The AVR has
in-built protection against sustained over-excitation,
caused by internal or external faults. This de-excites the
machine after a minimum of 5 seconds.
An engine relief load acceptance feature can enable full
load to be applied to the generator in a single step.
If three-phase sensing is required with the PMG system NB Continuous development of our products entitles us
the MX321 AVR must be used. to change specification details without notice, therefore
We recommend three-phase sensing for applications they must not be regarded as binding.
with greatly unbalanced or highly non-linear loads.
Front cover drawing typical of product range.

2
 UCI274H
WINDING 311

CONTROL SYSTEM SEPARATELY EXCITED BY P.M.G.

A.V.R. MX321 MX341
VOLTAGE REGULATION ± 0.5 % ± 1.0 % With 4% ENGINE GOVERNING
SUSTAINED SHORT CIRCUIT REFER TO SHORT CIRCUIT DECREMENT CURVES (page 7)

CONTROL SYSTEM SELF EXCITED

A.V.R. SX460 SX440 SX421
VOLTAGE REGULATION ± 1.5 % ± 1.0 % ± 0.5 % With 4% ENGINE GOVERNING
SUSTAINED SHORT CIRCUIT SERIES 4 CONTROL DOES NOT SUSTAIN A SHORT CIRCUIT CURRENT

INSULATION SYSTEM CLASS H

PROTECTION IP23
RATED POWER FACTOR 0.8
STATOR WINDING DOUBLE LAYER CONCENTRIC
WINDING PITCH TWO THIRDS
WINDING LEADS 12
STATOR WDG. RESISTANCE 0.0155 Ohms PER PHASE AT 22°C SERIES STAR CONNECTED
ROTOR WDG. RESISTANCE 1.82 Ohms 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. 6315-2RS (ISO)
BEARING NON-DRIVE END BALL. 6310-2RS (ISO)
1 BEARING 2 BEARING
WEIGHT COMP. GENERATOR 626 kg 641 kg
WEIGHT WOUND STATOR 253 kg 253 kg
WEIGHT WOUND ROTOR 227.53 kg 216.57 kg
WR² INERTIA 1.9349 kgm2 1.8843 kgm2
SHIPPING WEIGHTS in a crate 659 kg 673 kg
PACKING CRATE SIZE 123 x 67 x 103 (cm) 123 x 67 x 103 (cm)
50 Hz 60 Hz
TELEPHONE INTERFERENCE THF<2% TIF<50
COOLING AIR 0.514 m³/sec 1090 cfm 0.617 m³/sec 1308 cfm
VOLTAGE SERIES STAR 380/220 400/231 415/240 440/254 416/240 440/254 460/266 480/277
VOLTAGE PARALLEL STAR 190/110 200/115 208/120 220/127 208/120 220/127 230/133 240/138
VOLTAGE SERIES DELTA 220/110 230/115 240/120 254/127 240/120 254/127 266/133 277/138
kVA BASE RATING FOR REACTANCE
200 200 200 n/a 237.5 245 245 255
VALUES
Xd DIR. AXIS SYNCHRONOUS 2.11 1.91 1.77 - 2.50 2.31 2.11 2.02
X'd DIR. AXIS TRANSIENT 0.18 0.16 0.15 - 0.21 0.19 0.18 0.17
X''d DIR. AXIS SUBTRANSIENT 0.12 0.11 0.10 - 0.14 0.13 0.12 0.11
Xq QUAD. AXIS REACTANCE 1.28 1.15 1.07 - 1.53 1.41 1.29 1.23
X''q QUAD. AXIS SUBTRANSIENT 0.17 0.15 0.14 - 0.20 0.18 0.17 0.16
XL LEAKAGE REACTANCE 0.08 0.08 0.07 - 0.10 0.09 0.08 0.08
X2 NEGATIVE SEQUENCE 0.13 0.12 0.11 - 0.16 0.15 0.13 0.13
X0 ZERO SEQUENCE 0.08 0.08 0.07 - 0.10 0.09 0.08 0.08
REACTANCES ARE SATURATED VALUES ARE PER UNIT AT RATING AND VOLTAGE INDICATED
T'd TRANSIENT TIME CONST. 0.042 s
T''d SUB-TRANSTIME CONST. 0.012 s
T'do O.C. FIELD TIME CONST. 1.1 s
Ta ARMATURE TIME CONST. 0.012 s
SHORT CIRCUIT RATIO 1/Xd

3
 UCI274H
50 Winding 311
Hz THREE PHASE EFFICIENCY CURVES

4
 UCI274H
Winding 311
60
THREE PHASE EFFICIENCY CURVES
Hz

5
 UCI274H
Winding 311

Locked Rotor Motor Starting Curve

50
Hz
MX SX
346V 380V 400V 415V 440V 346V 380V 400V 415V 440V
30 30

25 25

20 20
PER CENT TRANSIENT VOLTAGE DIP

PER CENT TRANSIENT VOLTAGE DIP

15 15

10 10

5 5

0 0
0 100 200 300 400 500 600 700 800 0 100 200 300 400 500 600 700
LOCKED ROTOR kVA LOCKED ROTOR kVA

60
Hz
MX SX
380V 416V 440V 460V 480V 380V 416V 440V 460V 480V
30 30

25 25

20 20
PER CENT TRANSIENT VOLTAGE DIP
PER CENT TRANSIENT VOLTAGE DIP

15 15

10 10

5 5

0 0
0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800
LOCKED ROTOR kVA LOCKED ROTOR kVA

6
 UCI274H

Three-phase Short Circuit Decrement Curve. No-load Excitation at Rated Speed

Based on star (wye) connection.
50
Hz 10000

SYMMETRICAL

ASYMMETRICAL

1000
CURRENT (Amps)

100

10
0.001 0.01 0.1 1 10
TIME (secs)

Sustained Short Circuit = 1,000 Amps

60 10000
Hz

1000
CURRENT (Amps)

SYMMETRICAL

ASYMMETRICAL

100

10
0.001 0.01 0.1 1 10
TIME (secs)

Sustained Short Circuit = 1,400 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 1.07 440v X 1.06 Sustained x 1.00 x 1.50 x 2.50
415v X 1.12 460v X 1.12 Max. sustained duration 10 sec. 5 sec. 2 sec.
440v X 1.18 480v X 1.17 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. For other
connection the following multipliers should be applied to current
values as shown :
Parallel Star = Curve current value X 2
Series Delta = Curve current value X 1.732 7
 UCI274H
Winding 311 / 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

Series Star (V) 380 400 415 440 380 400 415 440 380 400 415 440 380 400 415 440
50 Parallel Star (V) 190 200 208 220 190 200 208 220 190 200 208 220 190 200 208 220
Hz Series Delta (V) 220 230 240 254 220 230 240 254 220 230 240 254 220 230 240 254

kVA 182.0 182.0 182.0 n/a 200.0 200.0 200.0 n/a 212.0 212.0 212.0 n/a 220.0 220.0 220.0 n/a

kW 145.6 145.6 145.6 n/a 160.0 160.0 160.0 n/a 169.6 169.6 169.6 n/a 176.0 176.0 176.0 n/a

Efficiency (%) 93.3 93.5 93.6 n/a 93.0 93.3 93.4 n/a 92.8 93.1 93.3 n/a 92.7 93.0 93.2 n/a

kW Input 156.1 155.7 155.6 n/a 172.0 171.5 171.3 n/a 182.8 182.2 181.8 n/a 189.9 189.2 188.8 n/a

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

Parallel Star (V) 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240
Hz
Series Delta (V) 240 254 266 277 240 254 266 277 240 254 266 277 240 254 266 277

kVA 218.8 225.0 225.0 235.0 237.5 245.0 245.0 255.0 250.0 258.8 258.8 275.0 256.3 265.0 265.0 280.0

kW 175.0 180.0 180.0 188.0 190.0 196.0 196.0 204.0 200.0 207.0 207.0 220.0 205.0 212.0 212.0 224.0

Efficiency (%) 93.2 93.4 93.6 93.7 93.0 93.2 93.5 93.6 92.8 93.1 93.3 93.4 92.7 93.0 93.3 93.3

kW Input 187.8 192.7 192.3 200.6 204.3 210.3 209.6 217.9 215.5 222.4 221.9 235.5 221.2 228.0 227.2 240.1

DIMENSIONS

PO Box 17 • Barnack Road • Stamford • Lincolnshire • PE9 2NB

Tel: 00 44 (0)1780 484000 • Fax: 00 44 (0)1780 484100
Website: www.newage-avkseg.com
© 2002 Newage International Limited.
Reprinted with permission of N.I. only.
Printed in England. TD_UCI274H.GB_11.02_02_GB