TEBEVERT 06

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TEBEVERTSwitch-mode inverters

Tebever_6s_2_02_eng.qxd 10.02.2002 18:52 Uhr Seite 6

All monitoring and controlunits are designed to be intrinsically safe so that anuninterrupted supply of theconnected load is ensured.

These products have a verygood dynamic range. At loadpeaks of 0 % – 100 % – 0 %,fluctuations and voltagesurges are corrected withina very short time.

In order to increase the avai-lability of the system amechanical by-pass can beprovided. In case of inverterfailure the system can bemanually switched to mainssupply (Fig. 2).

The EUE (electronic by-pass) is another componentfor increasing the systemsecurity. Using of the EUEloads are directly switched to the mains incase of overload or faults inthe inverter (Fig. 3).

This switch-over is madealmost without interruption.

Fig. 1: Inverter2500 VA

General

Operationmodes

Fig. 3: Inverter with static by-pass (EUE) for the uninterrupted supply of the loads.

Fig.4: Inverters connected in parallel with staticby-pass (EUE) for increasing the systemsafety.

Fig. 2: Inverter with mechanical by-pass (SUE),voltage gap approx. 100 ms

+

+

+

Load

Load

Battery

Battery

Inverter

Inverter

Battery Inverter 1

Inverter 2

Inverter 5

SUE

EUE

ChargeEUE

The TEBEVERT III is a newgeneration of inverter.

Sophisticated productionmethods and high-qualityelectronic components areutilized on this range ofequipment.

The use of modern semiconductors with highswitching frequencies provi-des compact construction,low weight and a very high efficiency.

The inverters can beconnected in parallel by special technology. So,systems in N or N + 1redundancy can be realised.Parallel connection can beused for increasing thepower and thus systemextension on site is pos-sible for increased powerdemand.

Systems with upto 5 inver-ters connected in parallel arepossible.


TypeseriesTebevert III

Technicaldata:

1000 VA,1500 VA,2500 VA,5000 VA,

Type

Type tableInverter

with integrated

mechanicalby-pass

Input DC voltage: see type tablePermissible deviation: + 20 %, - 15 %Disconnection value: 1,7 V/C +/- 1V

2,4 V/C +/- 1 VConnection value: 2,05 to 2,1 V/CRipple of theinput voltage: max. 5 % rms.

(2 mV reverse smoothingfor 48 V and 60 V)

Nominal power: see type tableOutput voltage: 230 VEfficiency: approx. 85 %

Static deviation: +/- 5 % at total loading -, nominal voltage - and power factor range

Frequency: 50 HzConstance of frequency: +/- 0,1 % (at self-step)Mains control of frequency: +/- 3 %Power factor range: 0,7 ind. to 0,8 cap.Voltage form: sine- waveDistortion factor: < 3 % (at linear load)Overload capacity: 2 x I nom. For 1,3 sec.,

cut-off after 40 sec.Crest factor load: (max. peak current 2,8 I

nom. at higher crest factorpermissible nominal current will reduce).

Radio interference: limiting class B ac. to EN 55022 B

Noise level: < 55 dB (A) at fan operation

Ambient temperature: + 5 °C to + 40 °C (option: + 55 °C)

Installation height: up to 1000 m above sealevel

Climatic environmentConditions: IEC 721-3-3 (3K3)

Humidity class: FCooling: temperature controlled

forced ventilation

Protection class: 1 to VDE and IEC 950 (EN 60950)

Mechanical design: 19”, rackDimensions: see type table

Protection class: IP 20 (without terminals)Painting: RAL 7032 for front panelInstruments: Output current,

bargraphIndications: - Output voltage present

- Fault- Overload- Mains synchronisation- Parallel operation

Pot.-free contact: - Fault (delay approx. 10 sec.)Connections at the rear

Connections: - AC-side: Plug- DC-side: * 1 D-Sub-Plug* 2 screw-bolts* 3 Plug

Indications and remote control by D-Sub-plug (* 2 terminal strip, * 3 plug).

Earthing bolts: M 6 boltsEUE/Parallel operation: Plug connector

Options: - SUE Operation- EUE Operation- Parallel operation

*1 1000 VA *2 1500 VA, 2500 VA, *3 5000 VA

Type Input Input current at Output Dimensions Weightvoltage cos phi 0,8 and nominal power H x W x D [kg]

input voltageG 48 E 230/ 4,4/2rfg-WPE1,0 48 V 18,7 A 1000 VA 134 x 483 x 300 11G 60 E 230/ 4,4/2rfg-WPE1,0 60 V 15,0 A 1000 VA 134 x 483 x 300 11G 24 E 230/ 6,5/2rfg-WPE1,5 24 V 56,5 A 1500 VA 177 x 483 x 400 19G 48 E 230/10,9/2rfg-WPE2,5 48 V 46,3 A 2500 VA 177 x 483 x 400 19G 60 E 230/10,9/2rfg-WPE2,5 60 V 37,0 A 2500 VA 177 x 483 x 400 19G 110 E 230/10,9/2rfg-WPE2,5 110 V 20,2 A 2500 VA 177 x 483 x 400 19G 220 E 230/10,9/2rfg-WPE2,5 220 V 10,0 A 2500 VA 177 x 483 x 400 19G 48 E 230/21,7/2rfg-WPE5,0 48 V 92,0 A 5000 VA 177 x 483 x 450 28G 60 E 230/21,7/2rfg-WPE5,0 60 V 74,0 A 5000 VA 177 x 483 x 450 28G 110 E 230/21,7/2rfg-WPE5,0 110 V 40,4 A 5000 VA 177 x 483 x 450 28G 220 E 230/21,7/2rfg-WPE5,0 220 V 20,0 A 5000 VA 177 x 483 x 450 28

Type Input Input current at Output Dimensions Weightvoltage cos phi 0,8 and nominal power H x W x D [kg]

input voltageG 48 E 230/ 4,4/2rfg-WPE1,0 48 V 18,7 A 1000 VA 177 x 483 x 300 17G 60 E 230/ 4,4/2rfg-WPE1,0 60 V 15,0 A 1000 VA 177 x 483 x 300 17G 24 E 230/ 6,5/2rfg-WPE1,5 24 V 56,5 A 1500 VA 223 x 483 x 400 21


Paralleloperation of

inverters

Mechanicalby-pass

SUE

Static by-pass EUE

Fig 6:

Inverter

with SUE

Conventional invertersystems operate with a“passive redundancy”i.e. the mains does notsupply the loads directlybut will be connected in afault situation.

In contrast to this, parallel operating inver-ters, that are actively supplying the load (N orN+1 operation) offer an“active redundancy”.

This operation moderequires a reliable exchan-ge of information by the inverters via controlsignals.

Furthermore a faulty unithas to be identified and switched off beforethe common busbar isaffected. The Tebevert IIIinverters fulfil the aboveconditions.

By means of a switch, theSUE enables the operationmodes “inverter priority“and “mains priority” to beselected.

Loads of systems withEUE are permanently supplied via the inverter.

The voltage gap, arising inthe event of failure in theinverter or overload,

is < 1,5 ms. So, even sensitive electronic loadscan be supplied without

any problems. The overlo-ad behaviour is approx.

5 x I rated for 100 ms, soloads with high inrush cur-rents can also be connec-ted.

In case of mains priorityoperation, the loads aredirectly fed from the mains and in case ofmains failure, they are

Parallel connection is controlled via a master-slave operation. In case ofa faulty master a newmaster will be selectedautomatically and theloads are uninterrupted.

The compact constructionof the inverters offersredundant systems in one housing. Apart fromthe inverters, rectifiers,electronic by-pass and the distribution can be installed here. (Fig. 5).

The location of the wiringpermits a safe exchange ofitems during operation.

Fig. 5: Inverter system 5 x 2,5 kVA with EUE

switched to thestandby inverter.

The voltage gap isapprox. 100 ms. Incase of inverter prio-rity operation, the

loads are permanentlysupplied via the inverter.

In the event of failure inthe inverter or overload,they are switched to thepresent mains. The voltage gap also isapprox. 100 ms.

For all 1 and 1.5kVA inver-ters, the SUE can be instal-led into a standard invertercabinet, this will increasethe overall size by 2U.

For the 2.5kVA inverter, the SUE is installed into aseparate 19“ rack mountedcabinet and measures 3Uhight and 260mm deep.

483

466

444

246,5

3 HE

= 1

33,4

19“- mounting 3 U


The control of parallel connected inverters ensures a uniform power distribution amongthe modules. The currents and bus voltage at a load of 1,11 kW is shown in fig. 7. Both inverters are actively supplying the load.

On failure of inverter A inverter B takes the full current load without a interference of the voltage. (Fig. 8).

After fault clearance the inverter is connected in parallel again. In Fig. 9 (see unit A) bringing up the current on the inverter can be critical. The bus voltage is not affected.

The Tebevert III inverter range can supply linear andnon-linear loads. Fig. 10 shows currents at combina-tional circuit part-load of 600 VA. A crest factor loadof max. 2,5 : 1 is permissible. Parallel connectedunits will enlarge this result accordingly.

Fig. 7: Two inverter parallel

Fig. 8: Failure of one inverter

Fig. 9: Connection of one inverter.

Fig. 10: Supply of a non-linear load.

A Output current inverter 1

B Output current inverter 2

C Bus voltageA

A

B

C

B

C

A

B

C

A

B

C

Output diagrams


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