User manual MERLIN GERIN VARSET A1 CUBICLE

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Detailed instructions for use are in the User's Guide.

[. . . ] 10: Classic or Comfort A3 cubicle. DB110577 Fig. 11: Harmony A3 cubicle. AAV31918_00 DB110578 DB110501 DB110499 5 Installation Ambient air temperature The ambient air temperature surrounding the electrical cubicle must be within the following limits: b maximum temperature: 40 °C b average temperature over a 24 hour period: 35 °C b average temperature over a 1 year period: 25 °C b minimum temperature: -5 °C. Ventilation rules b place the equipment in well ventilated premises b check maximum temperature limits are not exceeded when the equipment is in operation (see the "ambient air temperature" paragraph above) b make sure the air vents are not covered (minimum space 100 mm) b ensure the equipment is sheltered from dust and humidity. DB110694 Fig. 12: air flow. 6 AAV31918_00 Installation (cont. ) The electrical connections are to be made as shown in the electrical diagrams, (page 3, Figs. [. . . ] 21: power connection to connection pads (A1 and A2 cubicles). 24: power connection to connection pads (A3 and A4 cubicles). For A4 cubicles, the supply is spread over two columns. Tightening torques b cables connected to terminal blocks must be tightened to 42 Nm max. b cables connected to connection pads must be tightened to 50 Nm max. For cables connected to circuit-breakers, refer to the user guide. 8 DB108761 AAV31918_00 Commissioning DB108763 Configuring the Varlogic controller NR6/NR12 Setting the controller The varmetric controller has been configured in accordance with the capacitor bank's characteristics. The only operations that have to be carried out during commissioning are: b target cos setting if necessary b current transformer ratio configuration. Important: b if supplied by a summing CT (installation with several incoming transformers), it is the sum of the ratios of the different measurement CTs that must be taken into consideration b for an installation equipped with a generator set (load shedding), the capacitor bank must be taken out of circuit, by breaking the supply to the controller, before switching to the generator set. See page 7, "connection of current circuit". Controller front face. Commissioning the capacitor bank When first energised, the controller will immediately ask you to enter the user language. Choose the desired language using the keys pressing Enter. + and The parameters needed for correct capacitor bank operation are factory set. Some parameters depend on the installation's characteristics and must be modified on-site during commissioning b target cos (default value = 1) b current transformer ratio in order to display the measured values correctly b response current (C/K): this value is automatically searched for during the checking phase. The other parameters must not be changed. In particular, the time delay must never be less than 50 s, otherwise there is a risk the capacitor bank will incur serious damage and will no longer be covered by the warranty. b the "MIS. SERV" menu must be used to launch the commissioning sequence. The sequence includes the configuration of cos and the transformation ratio, as well as an automatic check that the parameters entered are compatible with the installation's actual parameters. Note : if an alarm appears during commissioning or when first used, refer to the "faults and solutions" paragraph to determine its origin. Checking correct operation b check that cos corresponds to the required value b if operating on full load, check the switched stepping functions correctly b after several hours' operation, check the temperature in the premises. For a better understanding of the parameters to be defined, refer to the Glossary (Chapter 7) in the controller manual. AAV31918_00 - then validate by 9 Commissioning (cont. ) DB108779 Commissioning a pre-configured capacitor bank. What to do in the event of an error? "Error codes" allow a diagnosis to be made and a solution to be found. Refer to chapter 5. 4 of the controller manual. [. . . ] To ensure capacitor discharge, successively short-circuit terminals: AE, BF and CD. DB110697 Checks One month after energising, check: b contactor terminal tightening torques. Each year check: b general cleanliness of the equipment b filters and ventilation system b terminal tightening torques. b proper working order of switching and protective devices b temperature in the premises: -5 °C to +40 °C max b capacitor capacitance, consult us if the capacitance value has changed by more than 10 %. Fig. [. . . ]

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