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Mecc Alte DER2 Technical Manual
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Mecc Alte DER2 Technical Manual

Digital regulator
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Technical Guide
DER2
Digital Regulator
Guida Tecnica
Regolatore Digitale DER2
The world's largest independent
producer of synchronous
alternators 1 – 5,000kVA

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Summary of Contents for Mecc Alte DER2

  • Page 1 Technical Guide DER2 Digital Regulator Guida Tecnica Regolatore Digitale DER2 The world’s largest independent producer of synchronous alternators 1 – 5,000kVA...
  • Page 2 DER2 digital regulator instruction manual - rev. 02 - pag. 2...
  • Page 3 CONTROLLING OF REGULATOR ALARMS pag. 30 Alarm signals with the indicator lights pag. 30 Description of alarms pag. 31 APO Output pag. 32 Board operation time pag. 32 APPENDIX p ag. 33 DER2 digital regulator instruction manual - rev. 02 - pag. 3...

  • Page 4: Main Characteristics

    Two versions of the DER 2 and DER 2/A regulators are available; the first one is optimised for Mecc Alte Series 3 to 38 alternators, while the second is optimised for Mecc Alte series 40, 43 and 46 alternators; the two versions differ primarily in the default parameters.
  • Page 5 • USB communications through the embedded USB port. WARNING : Operation of the DER2 is not specified below 12 Hz. NOTE (1) : The terminals are connected to each other on the board: 2 with 3, 4 with 5, 6 with 7, 9 with 10, 11 and 12.
  • Page 6 Hz% is the position relative to the Hz trimmer or the percen tage value of parameter P[21] Note 5) Value not to be exceeded. The effective range depends on parameter P[16] DER2 digital regulator instruction manual - rev. 02 - pag. 6...

  • Page 7: Block Diagram

    DER2 digital regulator instruction manual - rev. 02 - pag. 7...

  • Page 8: Installation

    In the event of damage, advise the shipper, the insurance company, the seller or Mecc Alte immediately. If the regulator is not installed immediately, store it in its original packaging in a dust and humidity-free environment.
  • Page 9 0,5 mm² for signal cables on terminals from 23 to 32 4. DER2 connections The DER2 regulator has 3 differential inputs, with 2 selectable scales for each of them (see fig. 1):  scale "H" for voltages between 75V and 150V ...
  • Page 10 (with a delay that can be programmed from 1 to 15 seconds) when, of all the alarms, one or several sepa- rately selectable alarms are active. NOTE : Software DxR Terminal DER2 digital regulator instruction manual - rev. 02 - pag. 10...
  • Page 11 SCC0301/01: Three phase sensing 75V-150V DER2 digital regulator instruction manual - rev. 02 - pag. 11...
  • Page 12 SCC0302/01: Three phase sensing 150V-300V DER2 digital regulator instruction manual - rev. 02 - pag. 12...
  • Page 13 SCC0303/01: Single phase sensing 75V-150V DER2 digital regulator instruction manual - rev. 02 - pag. 13...
  • Page 14 SCC0304/01: Single phase sensing 150V-300V DER2 digital regulator instruction manual - rev. 02 - pag. 14...
  • Page 15 SCC0305/01: Single phase sensing 300V-600V DER2 digital regulator instruction manual - rev. 02 - pag. 15...
  • Page 16 SCC0306/01: Single phase sensing 300V-600V (generator in threephase ZIG-ZAG connection) DER2 digital regulator instruction manual - rev. 02 - pag. 16...
  • Page 17 3.9Kohm resistor, connected as shown in figure 4b, the effect of the external potentiometer is cut in half (with the default value P[16]=4608 there is an excursion of approximately ± 7%). DER2 digital regulator instruction manual - rev. 02 - pag. 17...
  • Page 18 For the communication, the regulator implements a subsystem of the ModBus standard; the DER2 performs a “slave” operation the address of which is stored in the DER2 EEPROM and is set during configuration. Detailed descriptions of the ModBus commands implemented are into the Technical Guide “Digital Regula- tors Comunication Protocol”...
  • Page 19 USB connections (with module USB2DxR). Two versions of the regulator are available, called DER2 and DER2/A; they differ primarily in the default value of several parameters. Table 6 shows a complete list of the parameters that can be set, which define all the operational conditions of the regulator.
  • Page 20 Alternatively, the DER2 can be configured by directly setting the value of the P[10] parameter; in this case the value is calculated before entry, summing the numbers indicated in the column "Value" of Table 7, corresponding to the functions it is desired t enable.
  • Page 21 DER2 at that time; for example, if the regulator is connected with three phase sensing, even if bit B6 of the configuration word is set on 0 (automatic recognition of single phase –...
  • Page 22 Delay=1280ms (P[8]=64) and Excitation limit=50% (P[9]=16384); for low power alternators of the ECP3 series, the effects of a reduction of both the duration and limitation of the current may be experimented, such as Delay=320ms (P[8]=16) and Excitation limit=3,72% (P[9]=4096). DER2 digital regulator instruction manual - rev. 02 - pag. 22...
  • Page 23 P[11] parameter. The value of the integral gain K depends on the values of parameters P[12] and P[13] and, only for the standard DER2 with the STAB trimmer enabled, even on the 50/60Hz setting. In the other DER2 versions, for example DER2/A (black box), the integral gain K does not differ no matter how the 50/60Hz setting is set.
  • Page 24 , different from that at 50Hz, (fig. 9a); in the other versions of the DER2 (fig. 9b), for example DER2/A (black box), or if the STAB trimmer is disabled (fig. 9c), not only is there a difference between the integral value at 50Hz and at 60Hz, but even the value of location L[54] obtained by simply multiplying the proportional gain at location L[53] by the value of parameter P[13].
  • Page 25 TABLE 12 ECO/ECP SERIES: RECOMMENDED SETTINGS OF DER2 STAB TRIMMER Fw Rel. ≥ 15 Alternator Nominal frequency = 50Hz Singlephase Threephase Type Pole [KVA] STAB L[33] L[53] STAB L[33] L[53] ECO38-1SN/4 n.d. n.d. n.d. 16384 8192 ECO38-2SN/4 n.d. n.d. n.d.
  • Page 26 3. EXCITATION OVERCURRENT 3.1 Description The DER2 regulator is equipped with an excitation (main rotor) winding temperature estimator. An estimate of the temperature (in relative values) is available in real time (and it can be read) in location 45; in the lower part of the main window of the DxR terminal software there is a graphic representation of location 45.
  • Page 27 Activation of the function with voltage proportionate to the frequency is signalled by activation of alarm 6 (visible from the DER2 Terminal control panel and due to a change in the flashing indicator light). Parameter P[21](equivalent to the Hz trimmer) sets the Underspeed protection intervention threshold; if this is set on 26214, the protection cuts in at 48 Hz (if the 50/60 jumper and 50/60 flag in the Settings/ UFLO&LAM menu are not present) or at 57,5 Hz (if the 50/60 jumper is enabled or the 50/60 flag is active in...
  • Page 28 5) By increasing speed, the generator voltage will normalise and the alarm will disappear. 6) Set the speed to the nominal value fig. 11b: Voltage slope in underspeed protection, fig. 11a: Underspeed and Overspeed protection, P[23] P[21] and P[26] DER2 digital regulator instruction manual - rev. 02 - pag. 28...
  • Page 29 Vaux is considered proportionate to Vout and the proportional coefficient is determined by parameter P[14]. If the DER2 is powered directly by the regulated phase, parameter 14 should be set on 0; in case it is powered by auxiliary winding or PMG, the voltage (Vaux) must be measured, in no-load conditions and with output voltage regulated on the nominal value (Vout);...
  • Page 30 2 seconds; it flashes differently in the event of intervention or alarm, as indicated in fig. 11. LED OFF LED ON LED ON CHECKSUM SHORT CIRCUIT Hz or O.S. AMP and (Hz or O.S.) STOP fig.12 t [sec] Allarm intervention DER2 digital regulator instruction manual - rev. 02 - pag. 30...

  • Page 31: Description Of Alarms

    (parameter P[27]), A-08 is activated. The alarm is inhibited during transients. NOTE: Though the voltage is continuously regulated, the DER2 will switch off if the frequency goes under 20Hz. To reset the system it is necessary to stop completely the alternator.
  • Page 32 TT (last column of the file .alr). For this procedure please refer to the ''DownLoad Alarm'' function of the Upload/Download Menu of DxR Ter- minal Software, see Technical guide “Interface communication USB2DxR”. DER2 digital regulator instruction manual - rev. 02 - pag. 32...
  • Page 33 The connection diagrams of the DER2 and the supervision unit are shown in figures 13a, 13b or 13c based on the re- quested function and on the available supply voltage.

  • Page 34: Revision History

    Digital Regulators MODBUS communication protocol fileid=MODBUS http://www.meccalte.com/send_file.php? Parallel operation fileid=parallel%20manual_PD500.pdf REVISION HISTORY Revision Date Description rev.00 05/16 First Edition rev.01 09/16 SCC update with PD500 and PD-I rev.02 03/18 Errors correction DER2 digital regulator instruction manual - rev. 02 - pag. 34...
  • Page 35 DER2 digital regulator instruction manual - rev. 02 - pag. 35...
  • Page 36 Mecc Alte SpA France Far East China Via Roma Mecc Alte International S.A. Mecc Alte (F.E.) PTE LTD Mecc Alte Alternator Haimen LTD 20 – 36051 Creazzo Z.E.La Gagnerie 19 Kian Teck Drive 755 Nanhai East Rd Vicenza – ITALY 16330 ST.Amant De Boixe...