Uljanik TESU - TNC6 Generators

7/25/2019 Uljanik TESU - TNC6 Generators

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Brushless Constant-Voltage

Synchronous-Alternators

TNC6 45_

Low-Voltage for shipboard use

Design for MAN B&W L16/24 ENGINE

Uljanik TESU d.d tel. + 385 52 374 402Flaciusova 1, P.O. Box 114 fax. + 385 52 374 52552100 PULA E-mail: [email protected]

TESU


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Brushless Constant-Voltage Synchronous-Alternators TNC6 45_ 6

Brusless alternators family TNC6 45_ 6 are the result of our many yearsof experience in design and production of alternators and technicalrequests of the diesel engines producer MAN B&W Holeby.

Alternators are special designed to the MAN B&W specifications andthey are intended for coupling to the engines family L16/24 for marine

gensets.

Engine types and appertaining alternators can be founded in the tablebelow.

MAN B&W Holebydiesel engine

Altrnator type

5L 16/24 TNC6 455 6

6L 16/24 TNC6 456 6

7L 16/24 TNC6 457 6

8L 16/24 TNC6 458 69L 16/24 TNC6 459 6

This catalogue contains technical data with basic description of designand the alternator dimensions.


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Contents

1. General information 42. Electrical characteristic at 50Hz .. 53. Electrical characteristic at 60Hz .. 64. Technical data . 74.1. TNC6 45_ 6 general cut wiew . 74.2. Stator ... 8

4.2.1 Main stator . 84.2.2. Exciter stator .. 84.2.3. PMG stator . 84.2.4. Anti condensation heating . 9

4.2.5. Alternator protection equipment 94.2.6. Terminal box 94.2.7. Cover 104.2.8. Lifting eyes ... 104.2.9. Genset elastic mounting element acces ..104.2.10. Coupling screws access . 104.2.11. Voltege regulator access 104.2.12. Nameplate .11

4.3. Rotor 124.3.1. Main rotor . 124.3.2. Exciter rotor . 13

4.3.3. PMG rotor 134.3.4. Rotating rectifier .. 134.3.5. Fan . 13

4.4. Coupling .. 134.5. Ball Bearing 144.6. Excitation system .. 15

4.6.1. Mode of operation .154.6.2. Voltage Regulator . 154.6.3. Overvoltage suicide circuit ..164.6.4. Parallel operation ..17

5. Spare parts .. 18

6. Dimension drawing . 197. Dimension drawing of shaft .. 208. Electrical diagram 21


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1. General iformation

Alternator

The alternator is a brushless constant voltage synchronous machine. The machine is ofthe self-excited type with an automatic voltage regulator.

Exciter

The machine has a shaft-mounted exciter on the side of the non-drive end shield. Themain machine field winding is powered from the exciter rotor winding via a rotating, three-phase bridge-connected rectifier set.

Excitation system

The exciting current for the exciter is supplied by the PMG via the electronic voltageregulator. The regulator and the PMG are placed on the side of the non-drive end shield,under the end-mounted cover.

Vibration stability

The alternator fulfils the requirements concerning vibrations in accordance with thestandard ISO 8528-9.

Standards and Requirements

The alternators conform to applicable IEC requirements, DIN standards and VDE codesand particularly to VDE 0530, Specification for rotating electrical machines.

The alternators also conform to the requirements of the following classification societies:

Classification society Abbreviation Coolant temperature (CT) 0C

American Bureau of Shipping ABS 50Bureau Veritas BV 40,45, 50Germanischer Lloyd GL 40, 45Lloyd's Register of Shipping LRS 40, 45, 50Det Norske Veritas NV 35, 45Registro Italiano Navale RINa 45, 50

Marine alternators can also be supplied to satisfy the requirements of other classificationsocieties such as


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2. Electrical characteristics at 50 Hz

Electrical frequency: f = 50 Hz Insulation class: HSpeed: n = 1000 rpm Temperature rise: F*Voltage: U = 400 V Winding pitch: 6/7.5

Ambient temperature: 45C Designed according to the marineProtection: IP23 classification rules

Mounting of air filter inlet gives no reduction in kW output of the alternator.

Engine type 6L 16/24 7L 16/24 8L 16/24 9L 16/24

Alternator type TNC6 456-6 TNC6 457-7 TNC6 458-6 TNC6 459-6

kW 540 630 720 810

kVA 636 743 850 955

Efficiency (%) at power factor=0.8 (IEC standard)

Power : 100% 94.1 94.2 94.5 94.3

Power : 75% 94.3 94.4 94.6 94.4

Power : 50% 94.1 94.5 94.5 94.0

Power : 25% 92.0 92.6 92.5 91.1

Efficiency (%) at power factor=1 (IEC standard)

Power : 100% 95.4 95.5 95.7 95.8

Power : 75% 95.7 95.9 96.0 95.9

Power : 50% 95.6 95.9 95.9 95.6

Power : 25% 93.8 94.3 94.2 93.1

Reactances (%)Xd 284 331 306 206

Xq 216 252 234 158

Xd' 16.9 18.5 17.1 14.4

Xd'' 14.4 15.6 14.4 12.3

Xq'' 15.4 16.4 15 13.1

X2 14.3 16 14.6 12.7

Xo 6.8 7.1 7 5.8

Kcc 0.35 0.30 0.33 0.48

Time constants (Second)

T'do 1.51 1.6 1.85 1.3T'd 0.09 0.09 0.103 0.091

T''d 0.004 0.004 0.004 0.004

Ta 0.03 0.032 0.036 0.03

Short circuit current (A)

Maximum s.c. current Js(peak value)

13450 14580 18490 23700

Steady s.c. current JKD(rms value)

2840 3320 3800 4270

*

Except for 9L 16/24 - 1000 rpm. Here the temperature rise of the alternator is class H or reductionin power output for temperature rise class F.


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3. Electrical characteristics at 60 Hz

Electrical frequency: f = 60 Hz Insulation class: HSpeed: n = 1200 rpm Temperature rise: FVoltage: U = 450 V Winding pitch: 6/7.5

Ambient temperature: 45C Designed according to the marineProtection: IP23 classification rules

Mounting of air filter inlet gives no reduction in kW output of the alternator.

Engine type 5L 16/24 6L 16/24 7L 16/24 8L 16/24 9L 16/24

Alternator type TNC6 455-6 TNC6 456-6 TNC6 457-6 TNC6 458-6 TNC6 459-6

kW 500 600 700 800 900

kVA 591 708 827 950 1066

Efficiency (%) at power factor=0.8 (IEC standard)

Power : 100% 94.6 94.4 94.5 95.0 94.7

Power : 75% 94.7 94.7 94.8 95.0 94.7

Power : 50% 94.1 94.4 94.7 94.7 94.3

Power : 25% 91.2 92.0 92.6 92.5 91.2

Efficiency (%) at power factor=1 (IEC standard)

Power : 100% 96.0 95.7 95.8 96.0 96.1

Power : 75% 96.0 96.0 96.1 96.2 96.1

Power : 50% 95.6 95.7 95.9 95.9 95.7

Power : 25% 93.1 93.7 94.2 94.1 93.0

Reactances (%)Xd 272 336 386 364 259

Xq 208 256 294 277 198

Xd' 15.7 18 19.5 18.2 15.1

Xd'' 13.2 14.9 16.3 15 12.6

Xq'' 14.3 16.2 17.2 15.9 13.5

X2 13.7 15.5 16.7 15.4 13.1

Xo 6.4 7.6 7.9 7.8 6.5

Kcc 0.37 0.30 0.26 0.27 0.39

Time constants (Second)

T'do 1.54 1.68 1.8 2.06 1.58T'd 0.089 0.09 0.091 0.103 0.092

T''d 0.004 0.004 0.004 0.004 0.004

Ta 0.03 0.03 0.032 0.036 0.03

Short circuit current (A)

Maximum s.c.current Js(peak value)

12580 13260 14350 18140 23730

Steady s.c.current JKD

(rms value)

2657 3360 3920 4500 5060


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4. Technical data

4.1. TNC6 45_ General cut view

This figure represents the general section where all main parts of alternator can be seen.

1 Shaft 11 End shield2 Drive hub 12 Voltage regulator3 Flexplate 13 Ball bearing4 Fan 14 Air inlet cover (filter at option)5 Fan housing 15 Exciter field6 Rotor core and winding 16 Exciter armature7 Stator core and winding 17 Rotating rectifier8 Stator frame 18 Stator PMG9 Terminal box housing 19 Rotor PMG

10 Terminals


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4. Technical data

4.2. Stator

4.2.1 Main stator

Stator core

The stator core of the main machine is made of high-quality, both sides insulated electricalsheet steel. It is subdivided into packets by means of ventilating ducts and spacers thusensuring effective cooling. The complete core with winding is pressed into the housing.

Stator wind ing

Applying the most recent developments in engineering and materials is making statorwinding.

The alternator windings are manufactured in insulation system which satisfies class H.The insulation materials used are non-hydroscopic, non-tracking and withstand severethermal stressing.

The stator windings of the alternators are made of special enameled cooper wire.

The standard insulation uses a special resin impregnation process.

This results in high mechanical strength, vibration resistance and excellent dielectricstrength.

4.2.2 Exciter stator

The stator of the exciter is mounted on the end shield at the non-drive end.

The exciter field winding is made of enamelled cooper wire.

It is H class insulated and resin impregnated.

4.2.3 PMG stator

The stator of the PMG is accommodated between an exciter and bearing mounted on theend shield.

The stator core of the PMG machine is made of both sides insulated electrical sheet steel.

The armature winding of the PMG is made of enamelled copper wire and class Hinsulated.


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4. Technical data

4.2.4. Anti-condensation heating

Anti-condensation heating is installed in the alternator. It is recommended that heating

element starts up when the alternator is stopped. It is connected to the auxiliary terminals.The anti-condensation heater requires a voltage of 220 V and has heat output of 250W.

4.2.5. Alternator protection equipment

The stator winding is provided with thermal protection in the form of resistancethermometers. The resistance thermometers are of the PT100 type and are connected tothe auxiliary terminals.

4.2.6. Terminal box

The main terminal box of the alternator is located on the machine top.The neutral and phase wires are connected to the bars, one bar per phase and one barper neutral line.The openings provide access to the terminals.The connection of accessories is carried out on auxiliary terminals.The terminal strips are located on the opposite side of main terminal

Main termin als

The alternator main terminals are marked U, V, W.The access to the main terminals is enabled by removing the panel pos.3 from thealternator cover. (fig. on page 10)The main cables entry is provided from the bottom, under the alternator cover.Inside alternator, the cables are fixed to the cable trays.For cables laying and cables trays access it is necessary to remove the panel (pos. 2) inaddition to panel (pos. 3). (fig. on page 10)

Auxi l ia ry termina ls

The auxiliary terminals are located under the alternator cover opposite the main terminals.For the auxiliary terminals access it is necessary to remove the panel (pos. 3) opposite tothe main terminals panel. (fig. on page 10)


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4. Technical data

4.2.7. Cover

Alternator cover is placed as shown in figure below

4.2.8. Lifting eyes

The lifting eye serves for the complete alternator removal. It is located under the alternatorcover. The access to the eye is enabled by removing the panel (pos. 5).

4.2.9. Genset elastic mounting element access

The access to the genset elastic mounting element is enabled by removing the cover(pos.2)

4.2.10. Coupling screws access

Coupling screws access is enabled by removing the air outlet louvres (pos1) and panel(pos. 6)

4.2.11. Voltage regulator access

The voltage regulator is located under the end-mounted cover on alternator non-drive end.For access to the regulator it is necessary to remove the panel (pos. 4) on alternatorcover.

1

2

3

4

5

6


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4. Technical data

4.2.12. Nameplate

Main nameplate

The main nameplate is fitted to the cover on non-drive end side. It gives the manufacturers data, the alternator electrical data, the alternator type and serial number.

Rotat ion d i rect ion n amepla te

An arrow is fitted on the cover to indicate the rotation direction.


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4. Technical data

4.3. Rotor

The cylindrical rotor consists of the shaft, the rotor core, the field and damper windings.The shaft also carries, on the non-drive end, the rectifier wheel, the rotor core of theexciter with a three-phase winding, the rotor core of the PMG with permanent magnetsand the bearing. The machine is fitted with fan. The shaft has a hub and disc coupling.The rotating parts are shrunk onto the shaft and additionally secured by keys. The shaftdimensions are selected to ensure that the torque can be transmitted even underconditions of extreme stressing, e.g. in the case of short circuit.

4.3.1. Main rotor

Rotor core

The rotor core of the main machine is made of electrical non-oriented sheet steels. Theslots of the field winding and the damper winding slots are punched on the plates. Thelaminations are firmly pressed between the clamping plates. Ventilating ducts, which areformed by spacers, subdivide the core into packets and ensure effective cooling.

Roto r wind ing

The field winding is a single-layer winding. It is inserted in semi-closed slots, which are

arranged around the core periphery. The winding is distributed over slots per pole, whichensures that the rotating masses are uniformly distributed over the rotor circumference.Therefore the mechanical stressing due to the centrifugal forces is considerably smaller. Inaddition to this, a uniform temperature distribution is thereby obtained, which increases thelife of the winding. To make the end turns resistant to the centrifugal forces, rings offiberglass are fitted on the overhang. For the slot insulation of the rotor winding the Nomexmaterial is used. All the connections of the winding are hard-soldered.

The rotor core assembly with winding is resin impregnated. Excellent mechanical andelectrical properties are thus obtained.

The thermal endurance of the winding insulation of the main machine and the excitersatisfies the requirements of class H insulation. The insulation is resistant to moisture, oilvapours and sea air.

Damper wind ing

The damper winding consists of bars, which are accommodated in equally spaced slots.At the core ends, the bars are bent and welded to end rings, thus forming a damper cage.With synchronous machines the damper winding reduces distortion of the voltage and

current waveform to a minimum, even under conditions of unbalanced loading.


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4. Technical data

4.3.2. Exciter rotor

Three-phase exciter supplies the field winding of the main machine via the rotary rectifier.

The construction of the exciter rotor core is similar to that of the rotor core with the fieldwinding of the main machine.

The exciter winding is of the round-wire type and inserted in semi-closed slots. Multiplecoils are combined per pole and phase. Each coil comprises several turns. The slot andoverhang insulation is of Nomex brand. The rings of fiberglass are fitted over the windingoverhangs.

4.3.3. PMG rotor

The rotor core of the PMG machine is made of both sides insulated electrical sheet steel.

Permanent magnets are inserted in open slots which are arranged around the coreperiphery.

4.3.4. Rotating rectifier

The rotating rectifier is a full-wave three-phase rectifying bridge.

The rotating rectifier is placed on the backside of the machine. This rectifier includes threediode modules. Diodes are protected from over-voltage by varistor. This varistor ismounted in parallel with the main field.

The rectifier design and selected high-quality silicon elements ensure high operationsafety and protection of the diodes.

4.3.5. Fan

The alternators are designed for self-ventilation. A radial fan is mounted on the driving disk

plate and provides flow of air through the machine.

The alternator can be equipped with air inlet filter without reduction of output power.

4.4. Coupling

Alternators are of a single-bearing design B9/B15.

Multiple-disc clutch and adapter on the fan hausing are completely adapted to the enginesL16/24 MAN B&W .

Such design enables simple and quick coupling.


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1.PMG field2.Exciter armature3.Rotating rectifier4.Main field5.Main stator winding6.Exciter field7.Voltage regulator8.Overvoltage suicide

circuit9.PMG armature

4. Technical data

4.6. Excitation system

4.6.1. Mode of operation

The permanent magnet generator provides excitation for the exciter field via the VoltageRegulator which is the controlling device governing the level of excitation to the exciterfield. The voltage regulator responds to a voltage-measuring signal derived via theisolating transformer from the main stator winding. Isolating transformer is incorporated involtage regulator. By controlling the low power of the exciter field, the control of the highpower requirement of the main field is achieved through the rectified output of the exciterarmature.

Detailed wiring diagram is shown on page .

4.6.2. Voltage Regulator

Regulator data

Control modes : Constant Voltage modeVolt per Hertz from 35-70 HzVolt per Hertz till 45 HzVolt per Hertz till 55 Hz

Voltage measuring : three phase

Voltage and frequecy : 3 x 400 V , 50 Hz3 x 450 V , 60 Hz

Voltage adjustment : 10 % with eternal potentiometar


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4. Technical data

Accuracy : < 1 %

Self excitation : Self exciting from 3 Volt remanent voltage

Removable connectors : not interchangeable

Option connector : for optional regulations as soft start, power factor,multiple setpoint.

Protections : Underfrequency protection (underspeed)

Overshoot discrimination : to reduce overshoot after over excitation(saturated) situations

Fuse : 6.2 x 32 mm 10A super-fast fuse

Underf requency p rotect ion

The regulator has a frequency-trip function. This function drops the alternator voltage,when the alternator frequency comes below the adjusted value. Recovering from afrequency-trip situation occurs after a delay to prevent oscillation.The under speed protection may be disabled.Note: The frequency of the alternator is determined by its rotating speed. The voltageregulator cannot adjust the actual frequency.

Overshoot d iscr iminat ion

The voltage regulator has an over shoot discrimination circuit, which gets active when thealternator gives an over voltage after an overexcited situation, such as short circuits. TheAVR controls the voltage to approx.100 Volt and the red LED goes on. The voltage getsback according the chosen build up ramp.

4.6.3. Overvoltage suicide circuit

Due to circumstances of defects in the alternator or AVR, high voltages may occur on thealternator terminals. To prevent damage to the installation and alternator, the overvoltagesuicide modul can be used. The overvoltage suicide modul blows the fuses when an overvoltage occurs from approx. 40% above nominal voltage.


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4. Technical data

4.6.4. Parallel operation

Parallel operation is possible, when using our droop-kit. This kit has to be connected to X1

and X2 according to the diagrams. The potentiometer in the regulator serves for the droopadjustment in parallel operation.

The kW output is adjusted by prime mover governor. The speed characteristic of the primemover should be linear and should rise by at least 3% and not more than 5% betweenrated load and no load.

For the alternators with current transformer for droop compensation, potentiometer in theregulator is adjusted so that there is no reduction in the alternator voltage at unity p.f., buta 6% reduction at zero p.f. The corresponding voltage reduction at 0.8 p.f. is 3.6%.

In isolated operation and at any loading condition of the alternator, the droopcompensation provided for the alternator voltage can be checked with the followingrelationship:

( )%cos16 2

N

stI

IU =

e.g. at p.f.=0.8 and I/IN= 1

( )%6.318.016 2 ==st

U

If the alternator is to operate alone, droop compensation equipment is not required. It canbe deactivated by short-circuiting the associated current transformer on the secondaryside or setting potentiometer in the regulator on the controller to the left-hand stop.


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5. Spare parts

5.1. Classification societies spare parts

Classification societies generally call for the following spare parts:

Spare Classificatin society

Parts ABS BV GL LRS NV RINa1 rolling-contact bearing

1 rectifier assembly

1 electronic voltage regulator

5.2. Recommended spare parts

Regardless of the requirements made by the classification societies we recommend thatthe following spare parts be ordered together with the alternators.

Name Type Qty.

Regulator LX500 1

Diodes module SKKD 81/12 L1 3

Varistor module SKVC 20A 460C 1


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6. Dimension drawing


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7. Dimension drawing of shaft


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8. Electrical diagram


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Brushless Constant-Voltage Synchronous-Alternators TNC6 45_ 6

MAINTANCE & SERVICE

Brusless alternators family TNC6 45_ 6 dont require practically anymaintance.

Alternators servicing is provided by our own Service Dept., and throughSIEMENS service network worldwide.


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Uljanik TESU d.d.

Flaciusova 1, P.O.Box 11452100 PULACROATIA

Tel. + 385 52 374 402Fax. + 385 52 374 525E-mail: [email protected]

Documents

Uljanik TESU - TNC6 Generators