Protect PV.250 Operating Instructions AEG Power Solutions GmbH Department: PS TED Name: Wegener/Schenuit Revision: 01 Date: 27.09.
Protect PV.250 Operating Instructions Table of Contents 1 1.1 1.2 1.3 General Information .............................................................. 4 Technology.............................................................................. 5 Operating Elements................................................................. 7 View of the Cabinet ................................................................. 8 2 Safety Instructions ................................................................
Protect PV.250 Operating Instructions 6 Interfaces ............................................................................. 25 6.1 Communication Interface ...................................................... 25 6.1.1 General.................................................................................. 25 6.1.2 Technical Data ...................................................................... 26 6.1.3 Structure of the MultiCom CCC Interface ............................. 27 6.1.
Protect PV.250 Operating Instructions 1 General Information The Protect PV.250 is a solar inverter (INV) that feeds the electrical energy produced by the PV cells into an AC voltage mains. The Protect PV.250 is available in two basic versions: For feeding into a low-voltage mains (e.g. 400 VAC) For feeding into a medium-voltage mains (e.g. 10 kV; 20 kV; 33 kV) The required mains transformer is not supplied with either version of the unit and can be ordered as an extra if necessary.
Protect PV.250 Operating Instructions Technology Due to the utilisation of high-performance electronic components, the Protect PV.250 boasts a very high degree of operational reliability, is extremely efficient and is characterised by its versatility in communicating with other systems by means of interfaces. The entire control electronics of the Protect PV.250 are based on microcomputer assemblies.
Protect PV.250 Operating Instructions Fig. 1 illustrates the principle of the Protect PV.250. The PV cells supply the INV stack with DC voltage via DC load interrupter switch Q4. The INV stack converts this DC voltage into a 3-phase AC voltage. A sinusoidal current is fed into the mains via the AC filter, contactor K7 and the mains transformer.
Protect PV.250 Operating Instructions 1.2 Operating Elements Fig. 3 Item Arrangement of the operating elements on the doors Designation 1 Display and operation unit (DOU) 2 Emergency off 3 Q26 mains disconnector PV.
Protect PV.250 Operating Instructions View of the Cabinet Protect PV.250 +INV +DCD X:101 X:103 +ACD X:201 X:203 X:200 X:202 X:301 X:303 A91.2 A91.1 1.3 A17 A115.2 A115.1 A1 A27 Q4.1 A20 A29.1 A12 K7 L4 X41 X13 C7 L26 X11 X3:U,V,W Fig. 4 i Arrangement of the operating elements, components and individual PCBs with doors open NOTE: The image above may not always be strictly accurate, depending on which options have been selected. Item A1 A115.1-A115.2 A12 A17 A20 A27 A29.1-A29.
Protect PV.250 Operating Instructions 2 Safety Instructions i NOTE: All the key safety instructions are specified in the document entitled "Installation Instructions and Start-Up". 3 System Description 3.1 General This chapter describes the operating modes and functions of the Protect PV.250. 3.2 Operating Modes Two different operating modes may be used: • Individual operation • Partner operation 3.2.
Protect PV.250 Operating Instructions 4 System Function 4.1 Description of Sequence Control As soon as the control assembly of the Protect PV.250 is supplied with voltage, sequence control starts. Initially, the load interrupter switch Q4 remains open. Once the initialisation phase is complete and if no deactivating and selfacknowledging faults are pending, the load interrupter switch Q4 is closed in the "Waiting for feed conditions" status.
Protect PV.250 Operating Instructions 4.1.2 The "Waiting for feed conditions" Status In this status, the Protect PV.250 monitors the DC voltage of the PV cells that is present at the unit, as well as the mains voltage and the mains frequency. The monitoring systems are activated. In this status, no power is fed into the mains.
Protect PV.250 Operating Instructions Possible change of status: Once the delay has elapsed, the unit switches to the "Waiting for feed conditions" status. If a deactivating or self-acknowledging fault is triggered, the unit switches to the "Fault" status. The status can be switched from "Operation" to "OFF" using the "Off" control command. 4.1.5 The "Fault" Status If a deactivating or self-acknowledging fault is triggered (see Chapter 5), the unit switches to the "Fault" status.
Protect PV.250 Operating Instructions If the DC voltage continues to increase due to the sun's rays getting stronger and the mains voltage and mains frequency are within acceptable limits, a start-up attempt is made. During a startup attempt, the inverter stack is switched on, thereby drawing power from the DC voltage that is present. The inverter output contactor is open during a start-up attempt.
Protect PV.250 Operating Instructions 4.1.8 Sequence Control Parameters Switch-on conditions: Underfrequency, overfrequency, undervoltage, overvoltage: The unit will only switch from the "Waiting for feed conditions" status to the "Operation" status if the feed conditions are met. These conditions include the mains voltage and the mains frequency. These values must be within certain limits, which are described with the switch-on conditions.
Protect PV.250 Operating Instructions As soon as the control assembly of the Protect PV.250 is supplied with voltage, fan control always starts with the fast fan stage. The control can be restarted to check whether the fans are working correctly. For example, after maintenance work, it is not necessary to wait for the fans to reach the temperature criterion to switch on the fast fan stage. The fast fan stage is always active for at least a certain time.
Protect PV.250 Operating Instructions 4.2.2 Fan Control Parameters Stack temperature limit value for switching on the fan: If the IGBT stack temperature rises above this limit value, the fans which were switched off are switched to the fast fan stage. Stack temperature limit value for switching off the fan: If the IGBT stack temperature falls below this limit value, the fans which were running in the slow fan stage are switched off.
Protect PV.250 Operating Instructions 4.3.2 Operation With Monocrystalline or Polycrystalline Cells General: This type of solar cell does not require active earthing. Sequence control: Insulation monitoring is always active. Maintenance mode: No action in the event of a "maintenance mode" command. Starting the insulation test manually: No action, since the insulation test is always active. 4.3.3 Operation With Thin-Film Solar Cells General: This type of solar cell requires active earthing.
Protect PV.250 Operating Instructions The insulation test can only be started manually if an insulation test is not already running at the time. 4.3.4 Insulation Monitoring in Partner Operation In partner operation (see Chapter 4.5), both inverters are fitted with the isometer. Insulation measurement in single operation In single operation, the two inverters behave like two single units. Insulation measurement is active in both inverters.
Protect PV.250 Operating Instructions Fig. 7 4.5 MPP performance curve Partner Operation In "partner operation", the efficiency of a system with two inverters can be increased by connecting the two PV cells at less than full power. If insolation levels fall, the PV cells are connected and only one inverter is in operation. If insolation levels rise, the connection is terminated. Now both inverters are in operation. Each inverter is supplied with power by its associated PV cell. 4.5.
Protect PV.250 Operating Instructions 4.5.2 Single Operation Both inverters are switched on and are feeding power into the mains. The tie switch is open. This operating mode is active when insolation levels are high. Fig. 9 Single operation in partner operating mode Change of status to linked operation: If the capacity utilisation of the two inverters falls below a certain value, once a delay has elapsed, the system switches to linked operation.
Protect PV.250 Operating Instructions Change of status to linked operation: The system switches to linked operation when the fault message is acknowledged in the inverter affected by the fault. The inverter affected by the fault is switched off logically once the fault has been acknowledged. 4.5.4 Partner Operation During the Course of the Day Early morning: The tie switch is closed from the previous day.
Protect PV.250 Operating Instructions Maximum DC voltage difference for connecting the INV: When the system switches from single operation to linked operation, the MPP trackers in both inverters are switched off and an attempt is made to match the DC voltages. The system only switches to linked operation if the difference is less than the parameter value. 5 Monitoring Systems, Messages and Faults 5.
Protect PV.250 Operating Instructions 5.2 Table of Faults Fault/Message Deactivating Selfacknowledging Signalling DOU message X !Equipment temperature fault! #Equipment temperature fault# !Ambient temperature fault! #Ambient temperature fault# !Ambient temperature fault! Temperature monitoring systems IGBT stack temperature warning IGBT stack temperature fault IGBT supply air temp.
Protect PV.
Protect PV.250 Operating Instructions 6 Interfaces PV power stations are usually monitored from a central location. Alongside the PV cells, the inverter is a key component of a power station, which is why several communication interfaces are available as standard. These include relay contacts and optocouplers, as well as various serial interfaces with protocols for integration into higher-level monitoring systems.
Protect PV.250 Operating Instructions 6.1.2 Technical Data MultiCom CCC hardware data (assembly A29.1) Connector : RS485 connection: Distance: Bus stations: Data line: Port 1 RS232 for configuration and COM server connection X2: 9-pin D-sub (socket; insulated) Port 2 RS232/RS485 for Modbus X5: 9-pin D-sub (socket; insulated) Twisted pair with Data+, Data-, shielded, shield attached on one side 1200 m max. at 9600 baud Max. 32 Shielded 1:1 (2 x 0.22; twisted pair), e.g.
Protect PV.250 Operating Instructions 6.1.3 Structure of the MultiCom CCC Interface RS485: RS232: 1 J1 J4 1 1 X1 J5 X5 1 rt gn LED X3 1 1 B A B A X4 1 S1 Modbus X2 1 Configuration Fig. 11 MultiCom CCC interface as a Modbus interface (top view) Connections: X1: Internal inverter bus and power supply X2: Potential-free RS232 serial interface X3: Triggering of "remote signalling" X4: A remote panel can be connected to this potential-free CAN interface.
Protect PV.
Protect PV.250 Operating Instructions Port 2 (X5): RS485 pin assignment (default) Pin number Signal Description 3 B High data 8 A Low data Housing INV housing potential Please use a shielded fieldbus cable as the line, e.g. 2 x 0.22 twisted pair Lapp "UNITRONIC-BUS LD". Please connect the RS485 bus line via the bus interface connector supplied. In an RS485 network, the ends of the bus must always be terminated. If required, insert the 120R resistor supplied between connections A and B.
Protect PV.250 Operating Instructions The X5 interface can be switched from RS485 to RS232 with jumpers J4 and J5. The factory setting is RS485, i.e. all jumpers are inserted at J4. You have the option to switch the interface to RS232 by reconnecting all jumpers to J5.
Protect PV.250 Operating Instructions Cable 19,5 12 6 Fig. 15 Shield connection 6.1.4 Configuration The communication interface does not have to be configured in order to connect the PV inverter to the data logger system of the AEG "PV.LoG". Once the bus cable has been installed and the system has been powered up, the configuration settings are made fully automatically.
Protect PV.250 Operating Instructions Fig. 16 Main menu If the configuration does not start, you must wait for 10 seconds and repeat the procedure. Make sure that no data is received via the X2/X5 interfaces during this time. Press one of the following keys in the main menu: • to save all settings, finish the configuration and activate the MultiCom interface. • to cancel the configuration. • <2> to access the X5 data transmission configuration.
Protect PV.250 Operating Instructions 6.1.4.2 Configuring the Modbus Protocol To access the X5 data protocol configuration, you must press <4> in the main menu: Fig. 17 Data protocol configuration Press one of the following keys in the "X5 Data Protocol" menu: • to configure the Modbus protocol. • to save all settings. The configuration is finished and the main menu is opened again. • to cancel the configuration. This opens the main menu. Fig.
Protect PV.250 Operating Instructions 6.1.4.3 Configuring Modbus Data Transmission To access the X5 data transmission configuration, you must press <2> in the main menu: Fig. 19 Modbus/JBus data transmission configuration Press one of the following keys in the "X5 Data Transmission" menu: • <1-7> to set the baud rate. • to set the parity. • <8,9> to set the number of stop bits. • to save the settings. The configuration is finished and the main menu is opened again.
Protect PV.250 Operating Instructions 6.2 COM Server 6.2.1 General The COM server makes the serial port of the PV inverter available via an Ethernet network. A software application can communicate with the PV inverter via the network using a virtual COM port (this needs to be installed on a server or a workstation). The COM server is installed as standard and is used by the AEG service department for remote maintenance purposes.
Protect PV.250 Operating Instructions 6.2.5 LEDs Power LED This signals that the supply voltage is connected. If this LED does not light up, please check that the supply voltage is connected correctly. Status LED This flickers when there is any network activity on the serial port. Periodic flashing indicates that the port has a valid connection to another network station. Error LED This uses different flashing codes to indicate error statuses on the COM server or the serial port.
Protect PV.250 Operating Instructions • Please use the "ping" command to test that the COM server can be reached in the network. For additional detailed information, please refer to the quick-start instructions as well as the manual on the CD-ROM. 6.2.8 Configuration of the Virtual COM Port To install the virtual COM port on your operating system, you have to start the CD-ROM in the computer in question. • Please select the "Com Server" button in the top line of the main window of the product CD.
Protect PV.250 Operating Instructions 6.3 Remote Signalling The remote signalling board is a contact interface for signalling PV messages and controlling PV units. It is supplied as an option for the AEG PV system and is intended for installation in the PV unit. The remote signalling master board consists of 5 potential-free signalling contacts and one control input. There is an independent 24 VDC power supply for the control input. The control signal is activated by bridging the relevant input.
Protect PV.250 Operating Instructions X3: When a signal is received, the contact between the two contact points with the lower numbers is closed (normally open or "NO"). X4: When a signal is received, the contact between the two contact points with the lower numbers is opened (normally closed or "NC"). X5: The control signal is active when the input is bridged (normally open). The inverter is switched off. The following default signals are used for remote signalling: X3.
Protect PV.250 Operating Instructions 7 Graphical Display and Operation Unit 7.1 General The graphical display and operation unit (DOU) is integrated into the front of the solar inverter. It serves to signal and visualise unit data and to control the inverter system. The DOU consists of a display unit with 3 LEDs, a graphical LCD and an operating panel with 5 keys. The global unit status can be read from the 3 LEDs. An acoustic signal generator stresses the urgency of critical system statuses.
Protect PV.250 Operating Instructions 7.1.1 Signalling LEDs: Red, permanently ON: Deactivating fault (must be acknowledged via the menu) Red, flashing: Self-acknowledging deactivating fault Yellow, flashing: Self-acknowledging messages Green OFF: INV in sleep mode Green, flashing (1 Hz): INV waiting for feed conditions Green, flashing (0.
Protect PV.250 Operating Instructions Possible keyboard symbols and their function: Switch off inverter Switch on inverter Acknowledge acoustic signal generator Cursor up/Increase value/Scroll upwards Cursor down/Decrease value/Scroll downwards Cursor to the right Cursor to the left Status/Measured values menu System is blocked Acknowledge fault Select day/month/year curve Help menu No function Fig. 22 Keyboard symbols 7.2 Start-Up Following the power-up reset, the DOU performs a self-test.
Protect PV.250 Operating Instructions 7.3 Menu Structure 7.3.
Protect PV.250 Operating Instructions The "main menu" has a typical menu structure. Additional submenus are displayed on the left-hand side. All selectable submenus are displayed in a frame. A black background indicates the current cursor position. The bottom line displays the current real time, which can be adjusted using the "Settings" menu. On the right-hand side, the current key function is represented as a symbol which is displayed in a small framed area.
Protect PV.250 Operating Instructions At the top, a sun symbol indicates the current solar radiation trend. If the sun is black or a moon symbol is displayed, the PV voltage is so low that the inverter is in its idle state. An empty sun with no rays also indicates that the PV voltage is still too low, with the inverter in standby mode. The inverter is represented in the middle of the left-hand section. If a fault occurs or a message is present, the corresponding symbols flash on the inverter.
Protect PV.250 Operating Instructions Fig. 29 Solar radiation is too low, the inverter is in standby mode. Fig. 30 Solar radiation is too low, the inverter is in its idle state. The middle section displays the unit's most important infeed values in the form of digital values and a graph covering a certain period of time. The current daily data is shown as standard. This display appears automatically if no keys have been pressed for 1 minute. Fig.
Protect PV.250 Operating Instructions Fig. 33 Monthly data (t = day 1 – 31) for the last 12 months Fig. 34 Current yearly data (t = month 1 – 12) Fig. 35 Yearly overview (t = year of start-up to current year) The current display key assignment is shown on the right-hand side. Fig.
Protect PV.250 Operating Instructions Here you can switch the inverter on or off, depending on the unit status. If the operation has been blocked, this is indicated here via a key symbol. If a blank button is shown here, a fault is present. The flashing measured values menu then takes you to the inverter menu, where detailed information can be found on the fault and where you have to acknowledge it. You can use the double arrow key to select the different display types for the energy data logger.
Protect PV.250 Operating Instructions Photovoltaics UDC.[V]: 600 IDC.[A]: 481 PDC[kW]: 289 R-ISO[K? ]: 100 Fig. 38 Photovoltaics menu You can use the "Incoming mains" menu item to display the measured values for the incoming mains. Any mains faults or faults in the AC distribution are shown here too. -- Incoming mains -UL12-31.[V]: 270 270 270 IL1-3..[A]: 587 587 587 F....[Hz]: 50.0 Faults.: 2 Fig.
Protect PV.250 Operating Instructions There then follows the total energy counter ∑E and the inverter operating hours counter ∑t. You can scroll through the measured values using the "v" and "^" keys. You can use the "COM interface" menu item to look up the statuses of the communication PCBs. You can use the "AUX signals" menu item to look up the status of optional general signals on the remote signalling board. 7.3.5 Blocking You can call up the "Blocking" menu from the "main menu".
Protect PV.250 Operating Instructions 7.3.9 Service You can call up the password-protected "Service" menu from the "main menu". The password must be entered digit by digit and then confirmed by pressing the ENTER key. The default password is: 1201. Once the current password has been entered, you can select a submenu where you can change the DOU password. • In the "Password" menu, you can set the password for blocking operation and for setting parameters. A range of 0000 to 9999 is possible.
