Studer VarioString User Manual
  1. Manuals
  2. Brands
  3. Studer Manuals
  4. Recording Equipment
  5. VarioString
  6. User manual

Studer VarioString User Manual

Mppt solar charge controller vs - 120 48v- 120a
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
VarioString
MPPT solar charge controller

User manual

Accessories:
Remote control........................................... RCC-02/03
Temperature sensor...................................... BTS-01
External auxiliary relay module...................... ARM-02
Studer Innotec SA 2014
4O9P
VarioString
VS - 120
48V- 120A
V 1.0

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the VarioString and is the answer not in the manual?

Questions and answers

Related Manuals for Studer VarioString

Summary of Contents for Studer VarioString

  • Page 1: User Manual

    VarioString MPPT solar charge controller User manual VarioString VS - 120 48V- 120A Accessories: Remote control……………………………………. RCC-02/03 Temperature sensor…..…………………………. BTS-01 External auxiliary relay module...………………. ARM-02 Studer Innotec SA 2014 V 1.0 4O9P...
  • Page 2 Studer Innotec SA VarioString V 1.0 User manual...

  • Page 3: Table Of Contents

    Safe use of the photovoltaic modules .................. 15 4.3.5 Protection devices ........................15 4.3.6 Cable cross-section and connection ................... 15 4.3.7 Parallel connection of several VarioString ................15 4.3.8 Extension of an existing installation ..................16 Earthing ..............................16 4.4.1 Detecting an earthing fault ....................17 Lightning protection ..........................
  • Page 4 Displaying the values of a multi-unit system ................ 28 8.2.5 Displaying messages and event history ................28 Configuring the VarioString using the remote control RCC-02/03 ........... 28 8.3.1 The real time clock ........................29 Description of the VarioString parameters ..................29 8.4.1...

  • Page 5: Introduction

    When the VarioString is connected to batteries and photovoltaic panels, it automatically recharges batteries in an optimum way with all the available solar power. The VarioString can be connected to two strings of PV modules in different configurations (series, parallel, or independent). This configuration flexibility allows the user to optimise their installation.

  • Page 6: Important Safety Instructions

    This user manual is intended to serve as a guideline for the safe and efficient use of the VarioString. Anyone who installs or uses a VarioString can completely rely on this user manual and is bound to observe all the safety instructions and indications here in.

  • Page 7: Quality And Warranty

    Studer Innotec reserves the right to make any modifications to the product without prior notification. Studer Innotec is not liable for incidental, direct or indirect damages of any kind, including any profit loss, revenue loss or damages caused to equipment or goods due to defective equipment.

  • Page 8: Warnings And Guidelines

    HIGH-VOLTAGE DC INSIDE THE CHARGE REGULATOR: DANGER OF DEATH When the VarioString is in operation it generates voltages that can be potentially lethal (up to 1000Vdc). Any work on or close to the installation must only be carried out by thoroughly trained and qualified personnel.

  • Page 9: Mounting Place

    The VarioString must be installed vertically. A distance of at least 5cm between the units and/or 20cm around the equipment is required to guarantee adequate ventilation.

  • Page 10: Wiring

    Make sure that connections are completely tightened and that each wire is connected at the right place. The VarioString is intended to be connected exclusively to a source like a photovoltaic generator, excluding any other energy source. It is suitable for charging any type of lead-acid batteries. It is often possible to charge any other type of battery using proper settings and with the express approval of the battery supplier.
  • Page 11 Studer Innotec SA VarioString User manual V 1.0...

  • Page 12: Connecting The Battery

    4.2 C ONNECTING THE BATTERY The VarioString is a device which DC (battery) connection is to be connected exclusively to a battery. Most of the time, lead-acid batteries with liquid (VLA, VRLA) or gelled (GEL) and AGM electrolyte may be used. It can be easily configured to create charge profiles that are compatible with these various types of lead-acid batteries.

  • Page 13: Connecting The Battery

    Have a protection and disconnection device (fuse, circuit breaker) on the pole not connected to earth. The protection device must be rated according to the cable cross-section but must not exceed 1.25 x VarioString maximum current. It will be mounted as close as possible to the battery. User manual...

  • Page 14: Photovoltaic Generator (Pv)

    The number of strings connected in parallel depends on the power of each module. The sum of the power of all the panels connected to a VarioString should not exceed the power that the VarioString can charge.

  • Page 15: Safe Use Of The Photovoltaic Modules

    The maximum current of the solar generator (sum of the short-circuit currents for all the strings connected in parallel) is 26A (13A per input). In any case, the VarioString will limit the charging current (battery) to its rated current of 120A. 4.3.4 Safe use of the photovoltaic modules The VarioString is meant for PV generators supplying up to 600Vdc (900Vdc in series).

  • Page 16: Extension Of An Existing Installation

    Studer Innotec SA VarioString When the VarioString units are not synchronized, they must be programmed in the same way and it is recommended to not activate the periodical equalization function. The equalization can be manually started or will be done by the synchronized units.

  • Page 17: Detecting An Earthing Fault

    ONNECTING THE COMMUNICATION CABLES The VarioString is fitted with 2 connectors RJ45/8 (8) (see chap. 4.1) that enable to transfer information via a communication bus to other VarioStrings or to other equipment such as the RCC, the BSP or the Xcom having the proprietary protocol of Studer Innotec.

  • Page 18: Power-Up Of The Equipment

    (DIP switch, see chap. 8.1), they should be set before connecting the PV modules. The connection of the VarioString must be carried out in the following order. Any disassembly shall be carried out in the reverse order. Before closing the protections and energizing the equipment, check the polarity.

  • Page 19: Display System

    (at the beginning or at the end of the day). In order to save the battery power, the VarioString charger turns off and goes in standby mode when this indicator lights up or flashes. It will then consume less than 1W. The charger automatically switches on again when the sun starts shining and PV voltage goes back above the battery voltage.

  • Page 20: Error" Indicator (3)

    40V. Blinks Earth fault The VarioString detects an abnormal situation which does not correspond to the programmed value of the parameter {14040}, {14041} and {14042} checking the state of the earth connection. The VarioString turns off. It automatically starts again when the normal situation is restored.

  • Page 21: Battery Charging Process

    7.1 G ENERAL POINTS The VarioString has many parameters that can be modified by the user or the installer in order to adapt the equipment to the energy system the best possible way. The factory values of these parameters are reported in the table at the end of this manual.

  • Page 22: Temperature Compensation

    When this phase is authorized, it can be started manually by pressing for 2 seconds the “SET” button on the front of the VarioString. The countdown for the equalization time starts as soon as the equalization voltage {14021} is reached and lasts as long as the battery voltage is higher than the absorption voltage {14009}.

  • Page 23: Configuring The Variostring(S)

    If an Xtender inverter/charger is interconnected (communication) to a VarioString, the Xtender battery cycle will be imposed to the VarioString of the system. This function may be disabled by parameter {14036}. If no Xtender is connected to the VarioString, the latter uses its own setting.
  • Page 24 3 different ways on the VarioString: independent (each string of PV modules connected to one VarioString PV input), in series or in parallel. With the automatic position, the VarioString will determine itself the connection topology. In this case, the VarioString will perform a cabling test when it detects a voltage at both the PV inputs.

  • Page 25: Displaying The Equipment Status Using The Remote Control Rcc-02/03

    Configuration of cabling of PV modules Can be different Only the configuration of the cabling of the MPPT inputs can be different from one VarioString to another. The battery charge cycle should be configured the same (one common battery for all the VarioStrings).
  • Page 26 Battery set point 15108 VS state Text State of the VarioString (Off, On) *Some values can’t be displayed in the multi-unit display. They will be visible while going in the sub- screen of the Multi-unit display, showing every unit individually. V 1.0...

  • Page 27: Displaying The Operating Mode Of The Equipment (Info N° 15013,15014,15015)

    This status is not a problem but may highlight that the system performances could be enhanced by reducing ambient temperature. Charge P: the max power of the VarioString is reached (7000W). This mode is also shown if one of the two MPPT inputs reaches its maximum power in independent mode (3500W).

  • Page 28: Displaying The Values Of A Multi-Unit System

    8.2.1.1. Moreover, the units can be viewed one by one by using the arrows up/down after the SET button (2x) when the VarioString image is with a black background.

  • Page 29: The Real Time Clock

    8.3.1 The real time clock The VarioString features a real time clock that allows among others to have a correct date and hour for the RCC records. This clock must be set using the remote control RCC-02/03. Thanks to an internal battery, this setting is retained even when the equipment is disconnected from its voltage source (battery or PV).

  • Page 30: Organisation Of The Variostring Configuration Menu

    Studer Innotec SA VarioString 8.4.3 Organisation of the VarioString configuration menu Level User ref. Parameter Basic 14000 BASIC SETTINGS Expert 14174 Block manual programming (dip-switch) Expert 14001 Battery charge current Basic 14002 Configuration of PV modules Basic 14067 Restore default settings Inst.

  • Page 31: Basic Settings {14000

    PV strings that are not connected together. The parallel cabling mode is reserved for the case when your PV string(s) are brought to the VarioString with one set of cables and the two MPPT inputs on the VarioString are physically connected (cabling accessories are available).

  • Page 32: Battery Management And Cycle {14003

    Synchronisation battery cycle with Xtender {14036} (yes) When a Studer inverter of the range Xtender is used in the system, it can transfer to the VarioTrack its battery charge setting so that they can operate together in an optimum way. Synchronization allows a coherent operation of multiple units which participate to the battery charging and avoids multiple successive equalizations triggered by each charger.
  • Page 33 Studer Innotec SA VarioString progressively. Therefore, the VarioString does not work at the optimal point of the PV generator because all the available PV power is not required. 8.4.5.5.1 Absorption phase allowed {14008} (yes) This parameter determines whether the absorption phase is carried out or not. When this phase is disabled, the charger goes directly to the following authorized phase (equalization, but most often a floating phase).
  • Page 34 Studer Innotec SA VarioString 8.4.5.6.3 Equalization voltage {14021} (62.4 Vdc) This parameter determines the maximum voltage during the equalization phase. This voltage is corrected by the temperature compensation factor {14035} if a temperature sensor (BTS-01 or BSP) is installed in the system.

  • Page 35: System {14037

    This parameter allows the VarioString to constantly verify the state of the battery grounding connection, if desired. In the event of an error, the VarioString stops until the battery grounding is re- established. It is possible to ground either of the battery terminals.
  • Page 36 This parameter allows the VarioString to constantly verify the state of the PV grounding connection during its use in series or parallel mode. In the event of an error, the VarioString stops until the PV grounding is re-established. It is possible to ground either of the PV terminals.

  • Page 37: Auxiliary Contacts 1 {14070} And 2 {14122

    Studer Innotec SA VarioString 8.4.6.12 ON of the VarioString {14038} This parameter allows to turn on all the VarioString in the system. 8.4.6.13 OFF of the VarioString {14039} This parameter allows to turn off all the VarioString in the system.
  • Page 38 Activation time for the auxiliary relay in night mode {14076} {14128} (1 min) 8.4.7.3.2 VarioString is ON {14188} {14189} (no) The contact is activated if the VarioString is switched ON. 8.4.7.3.3 VarioString is OFF {14078} {14130} (no) The contact is activated if the VarioString is switched OFF.
  • Page 39 Studer Innotec SA VarioString The auxiliary contact will only become deactivated when the battery has risen above a certain voltage and a certain time period, both values independent of the activation parameters. This voltage and time period for deactivation is also programmable.

  • Page 40: Accessories

    RCC-02/03 EMOTE CONTROL AND PROGRAMMING CENTRE This accessory is an important complement to the VarioString. It can be connected via one of the two communication connectors "Com. Bus" (7) (see chap. 4.1 Elements of the cable compartment) thanks to the cable supplied with the remote control.

  • Page 41: Temperature Sensor Bts-01

    Item reference: CAB-RJ45-8-xx. The length in metres is specified by xx. It is possible to connect up to 2 RCC or Xcom to a single VarioString, and up to 3 RCC or Xcom to a system with several VarioString or Xtender units.

  • Page 42: Connecting The Temperature Sensor (Bts-01)

    BTS, unplug the temperature, plug in the ARM module in its place and connect the battery temperature sensor to the ARM module. The auxiliary relay module allows the VarioString to have 2 independent relays, each of which are fully programmable.

  • Page 43: Equipments Compatible With The Variostring

    The charging current of the equipment add up with no priority. When the Xtender charging current is for example set to 100A and the VarioString supplies 120A, the battery charging current may be 220A during the bulk phase. 10.2 B...

  • Page 44: Wiring Examples

    Studer Innotec SA VarioString 11 WIRING EXAMPLES 11.1 V + RCC-02 ARIO TRING 11.2 C 11.1 OMMENTS ON THE WIRING EXAMPLES Elem. Description Refer to Remote control See chap. 9.1, 8.2 and 8.4.7 Battery See chap. 4.2 Lightning protection device See chap.

  • Page 45: Maintenance Of The Installation

    Studer Innotec SA VarioString 12 MAINTENANCE OF THE INSTALLATION Except for the periodic check of the connections (tightening, general condition) the VarioString does not require any particular maintenance. 13 PRODUCT RECYCLING The VarioString meets the European directive 2011/65/EU on hazardous substances and does not contain the following elements: lead, cadmium, mercury, hexavalent chrome, PBB or PBDE.

  • Page 46: Parameter List

    1 hours Expert 14035 Temperature compensation -3 mV/°C/cell Basic 14036 Synchronisation battery cycle with Xtender Expert 14038 ON of the VarioString Expert 14039 OFF of the VarioString Expert 14040 Type of battery grounding No control Expert 14041 Type of PV grounding...
  • Page 47 Activation time for the auxiliary relay in night mode Expert 14076 1 min (AUX 1) Expert 14078 VarioString is OFF (AUX 1) Expert 14079 Battery undervoltage (AUX 1) Expert 14080 Battery overvoltage (AUX 1) Expert 14081 Earth fault (AUX 1)
  • Page 48 Activation time for the auxiliary relay in night mode Expert 14128 1 min (AUX 2) Expert 14130 VarioString is OFF (AUX 2) Expert 14131 Battery undervoltage (AUX 2) Expert 14132 Battery overvoltage (AUX 2) Expert 14133 Earth fault (AUX 2)
  • Page 49 14179 PV voltage fixed (for PV in //) 500 Vdc Inst. 14182 Reset PV energy meter Expert 14188 VarioString is ON (AUX 1) Expert 14189 VarioString is ON (AUX 2) Inst. 14190 PV wiring type erased from memory User manual...

  • Page 50: Technical Data

    Studer Innotec SA VarioString 16 TECHNICAL DATA 16.1 G ENERAL SPECIFICATIONS Galvanic isolation Maximum conversion efficiency > 98% MPPT efficiency >99% PV grounding possibility PV +, PV -, floating Consumption max en stand-by 25 mA (1.25W) Warranty 5 years Weight 7.5 kg...

  • Page 51: Communication

    Studer Innotec SA VarioString 16.6 C OMMUNICATION Network cabling Studer communication bus Remote control and display RCC-02/03 / Xcom-232i / Xcom-LAN / Xcom-GSM Language menus English, French, German, Spanish Datalogging With RCC-02/03 on SD card, one point every minute 16.7 C OMPLIANCE EMC 2004/108/CE ·...

  • Page 52: Index Of Parameters

    Studer Innotec SA VarioString 17 INDEX OF PARAMETERS {14000} ........31 {14073} ........38 {14128} ........38 {14001} ....21, 27, 31, 32, 34 {14074} ........38 {14129} ........37 {14002} ........31 {14075} ........38 {14130} ........38 {14003} ........32 {14076} ........
  • Page 53 Studer Innotec SA VarioString User manual V 1.0...
  • Page 54 Studer Innotec SA VarioString V 1.0 User manual...
  • Page 55 Studer Innotec SA VarioString User manual V 1.0...
  • Page 56 Studer Innotec SA Rue des Casernes 57 1950 Sion – Switzerland Phone: +41(0) 27 205 60 80 Fax: +41(0) 27 205 60 88 info@studer-innotec.com www.studer-innotec.com...

This manual is also suitable for:

Variostring vs-120

Table of Contents