S5L1S-F4 Wdg.

311 - Technical Data Sheet

Standards

STAMFORD industrial alternators meet the requirements of the relevant parts of the IEC 60034 and the relevant
sections of other international standards such as BS5000-3, ISO 8528-3, VDE 0530, NEMA MG1-32, CSA C22.2-100
and AS 60034. Other standards and certifications can be considered on request.

Quality Assurance

Alternators are manufactured using production procedures having a quality assurance level to BS EN ISO 9001.

Excitation and Voltage Regulators

Excitation System
AVR Type AS440 MX341 MX321 MX322
Voltage Regulation ± 1% ± 1% ± 0.5% ± 0.5% with 4% Engine Governing
AVR Power Self-Excited PMG PMG PMG

No Load Excitation Voltage (V) 9.9 - 8.5

No Load Excitation Current (A) 0.62 - 0.54
Full Load Excitation Voltage (V) 44
Full Load Excitation Current (A) 2.6
Exciter Time Constant (seconds) 0.099

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Electrical Data
Insulation System H
Stator Winding Double Layer Lap
Winding Pitch 2/3
Winding Leads 12
Winding Number 311
Number of Poles 4
IP Rating IP23

RFI 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%
Short Circuit Ratio 1/Xd
Steady State X/R Ratio 15.74
50 Hz 60 Hz
Telephone Interference THF<2% TIF<50
Cooling Air Flow 1.035 m³/sec 1.312 m³/sec
Voltage Series Star (V) 380 400 415 440 416 440 460 480
Voltage Parallel Star (V) 190 200 208 220 208 220 230 240
Voltage Series Delta (V) 220 230 240 254 240 254 266 277

kVA Base Rating (Class H) for

670 670 670 650 738 775 800 825
Reactance Values (kVA)

Saturated Values in Per Unit at Base Ratings and Voltages

Xd Dir. Axis Synchronous 2.90 2.62 2.43 2.10 3.20 3.01 2.84 2.69
X'd Dir. Axis Transient 0.16 0.14 0.13 0.11 0.17 0.16 0.15 0.14
X''d Dir. Axis Subtransient 0.11 0.10 0.09 0.08 0.12 0.11 0.11 0.10
Xq Quad. Axis Reactance 2.43 2.19 2.03 1.76 2.68 2.51 2.37 2.25
X''q Quad. Axis Subtransient 0.25 0.23 0.21 0.18 0.28 0.26 0.25 0.24
XL Stator Leakage Reactance 0.04 0.04 0.04 0.03 0.05 0.05 0.04 0.04
X2 Negative Sequence Reactance 0.18 0.16 0.15 0.13 0.20 0.18 0.17 0.16
X0 Zero Sequence Reactance 0.09 0.08 0.07 0.06 0.10 0.09 0.09 0.08
Unsaturated Values in Per Unit at Base Ratings and Voltages
Xd Dir. Axis Synchronous 3.48 3.14 2.92 2.52 3.84 3.61 3.41 3.23
X'd Dir. Axis Transient 0.18 0.16 0.15 0.13 0.20 0.18 0.17 0.17
X''d Dir. Axis Subtransient 0.13 0.12 0.11 0.09 0.14 0.13 0.13 0.12
Xq Quad. Axis Reactance 2.50 2.26 2.10 1.81 2.76 2.59 2.44 2.31
X''q Quad. Axis Subtransient 0.31 0.28 0.26 0.22 0.34 0.32 0.30 0.28
XL Stator Leakage Reactance 0.05 0.05 0.04 0.04 0.06 0.05 0.05 0.05
Xlr Rotor Leakage Reactance 0.08 0.08 0.07 0.06 0.09 0.09 0.08 0.08
X2 Negative Sequence Reactance 0.21 0.19 0.18 0.15 0.23 0.22 0.21 0.20
X0 Zero Sequence Reactance 0.10 0.09 0.09 0.08 0.11 0.11 0.10 0.10

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Time Constants (Seconds)

T’d Transient Time Const. 0.080
T’’d Sub-Transient Time Const. 0.012
T’do O.C. Field Time Const. 2.500
Ta Armature Time Const. 0.019
T’’q Sub-Transient Time Const. 0.0190
0
Resistances in Ohms (Ω) at 22 C
Stator Winding Resistance (Ra),
0.00370
per phase for series connected
Rotor Winding Resistance (Rf) 2.16
Exciter Stator Winding Resistance 17
Exciter Rotor Winding Resistance per
0.092
phase
PMG Phase Resistance (Rpmg) per
1.91
phase
Positive Sequence Resistance (R1) 0.0046
Negative Sequence Resistance (R2) 0.0053
Zero Sequence Resistance (R0) 0.0046
Saturation Factors 400V 480V
SG1.0 0.318 0.293
SG1.2 1.23 1.059
Mechanical Data

All alternator rotors are dynamically balanced to better than ISO 21940-11 Grade 2.5 for
Shaft and Keys
minimum vibration in operation. Two bearing generators are balanced with a half key.

1 Bearing 2 Bearing
SAE Adaptor SAE 00, 0, 0.5, 1 SAE 00, 0, 0.5, 1
Moment of Inertia 10.033 kgm² 9.7551 kgm²
Weight Wound Stator 805kg 805kg
Weight Wound Rotor 684kg 655kg
Weight Complete Alternator 1685kg 1694kg
Shipping weight in a Crate 1775kg 1780kg
Packing Crate Size 166x87x124(cm) 166x87x124(cm)
Maximum Over Speed 2250 RPM for two minutes
Bearing Drive End - BALL.6220(ISO)
Bearing Non-Drive End BALL.6314(ISO) BALL.6314(ISO)

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THREE PHASE EFFICIENCY CURVES

50Hz 60Hz

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Locked Rotor Motor Starting Curves - Separately Excited

50Hz

60Hz

Transient Voltage Dip Scaling Factor Transient Voltage Rise Scaling Factor
Lagging PF Scaling Factor Lagging PF Scaling Factor
<= 0.4 1.00 <= 0.4 1.25
0.5 0.95 0.5 1.20
0.6 0.90 0.6 1.15
0.7 0.86 0.7 1.10
0.8 0.83 > 0.7 1.00
0.9 0.75
0.95 0.70
1 0.65
Note: To determine % Transient Voltage Dip or Voltage Rise at various PF, multiply
the % Voltage Dip from the curve directly by the Scaling Factor.

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Locked Rotor Motor Starting Curves - Self Excited

50Hz

60Hz

Transient Voltage Dip Scaling Factor Transient Voltage Rise Scaling Factor
Lagging PF Scaling Factor Lagging PF Scaling Factor
<= 0.4 1.00 <= 0.4 1.25
0.5 0.95 0.5 1.20
0.6 0.90 0.6 1.15
0.7 0.86 0.7 1.10
0.8 0.83 > 0.7 1.00
0.9 0.75
0.95 0.70
1 0.65
Note: To determine % Transient Voltage Dip or Voltage Rise at various PF, multiply
the % Voltage Dip from the curve directly by the Scaling Factor.

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Three-phase Short Circuit Decrement Curve - Separately Excited

50Hz

Sustained Short Circuit = 2900 Amps

60Hz

Sustained Short Circuit = 3300 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
time 0.001 seconds and the minimum current applicable to the various types of short circuit :
point in respect of nominal operating voltage :
3-phase 2-phase L-L 1-phase L-N
50Hz 60Hz Instantaneous x 1.00 x 0.87 x 1.30
Voltage Factor Voltage Factor Minimum x 1.00 x 1.80 x 3.20
380V X 1.00 416V X 1.00 Sustained x 1.00 x 1.50 x 2.50
400V X 1.05 440V X 1.06 Max. sustained duration 10 sec. 5 sec. 2 sec.
415V X 1.09 460V X 1.10 Note 3 All other times are unchanged
440V X 1.16 480V X 1.15 Curves are drawn for Star connections under no-load
The sustained current value is constant irrespective of
excitation at rated speeds. For other connection (where
voltage level applicable) the following multipliers should be applied to
current values as shown :
If MX322 or digital AVR is used, the sustained short- Parallel Star = Curve current value X 2
circuit current value is to be multiplied by a factor of Series Delta = Curve current value X 1.732
1.1.

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Typical Alternator Operating Charts

400V/50Hz

480V/60Hz

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RATINGS AT 0.8 POWER FACTOR

Class - Temp Rise Standby - 163/27°C Standby - 150/40°C Cont. H - 125/40°C Cont. F - 105/40°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
Series Delta (V) 220 230 240 254 220 230 240 254 220 230 240 254 220 230 240 254
Hz
kVA 738 738 738 715 710 710 710 690 670 670 670 650 620 620 620 600
kW 590 590 590 572 568 568 568 552 536 536 536 520 496 496 496 480
Efficiency (%) 94.4 94.6 94.8 95.1 94.6 94.8 94.9 95.1 94.8 95.0 95.1 95.3 95.0 95.2 95.3 95.4
kW Input 625 624 623 602 601 599 598 580 565 564 564 546 522 521 521 503

Series Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480
60 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 806 844 878 906 781 819 848 875 738 775 800 825 688 719 731 750
kW 645 675 702 725 625 655 678 700 590 620 640 660 550 575 585 600
Efficiency (%) 94.7 94.8 94.8 94.9 94.8 94.9 94.9 95.0 95.0 95.0 95.1 95.1 95.1 95.2 95.3 95.3
kW Input 681 712 741 764 659 691 715 737 622 652 673 694 579 604 614 629

De-rates
All values tabulated above are subject to the following reductions:
- 5% when air inlet filters are fitted
- 3% for every 500 meters by which the operating altitude exceeds 1000 meters above mean sea level
- 3% for every 5°C by which the operational ambient temperature exceeds 40°C @ Class H temperature rise
(please refer to applications for ambient temperature de-rates at other temperature rise classes)
- For any other operating conditions impacting the cooling circuit please refer to applications
Note: Requirement for operating in an ambient exceeding 60°C and altitude exceeding 4000 meters (for <690V) or
1500 meters (for >690V) must be referred to applications.

Dimensional and Torsional Drawing

For dimensional and torsional information please refer to the alternator General Arrangement and rotor drawings
available on our website (http://stamford-avk.com/)

Note: Continuous development of our products means that the information contained in our data sheets can
change without notice, and specifications should always be confirmed with Cummins Generator
Technologies prior to purchase.

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