User manual MERLIN GERIN CDS TRI

[. . . ] 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. 1 and 2) Connection of the current circuit b current transformer / controller connection cable cross-section: 2. 5 mm2 minimum. Installation of CT (current transformer) If there is an existing CT: b ensure it is placed upstream of the installation, capacitor bank included (Fig. 13) b ensure it has a 5A secondary b ensure it has a power rating greater than 5 VA b connect the varmetric controller in series with the existing circuit. [. . . ] 13, 14) P1 to the transformer or source side P2 to the load and capacitor bank side b ensure it has a 5A secondary b ensure it has a power rating greater than 5 VA. DB108782 DB108778 Electrical connections Fig. 14: 3-phase diagram of CT connection. CT connection b identify the phase onto which the CT is placed as phase L1 (Fig. 14) b ensure that phase L1 of the capacitor bank is connected to the busbar fitted with the CT (Fig. 14) b connect the cables from the CT to the terminal block, S1 to terminal K and S2 to terminal L (Fig. 15: connection of CT to terminal block. DB110511 Earth connection (Fig. 16) The capacitor bank must be earthed using the terminal intended for this purpose. Load shedding The terminals marked 1L3 and 2L3 are linked using jumper A. To be able to shed load, replace the jumper with one of the installation's normallyclosed contacts (Figs. 19: terminal block with load shedding. AAV31918_00 7 Installation (cont. ) Choice of cables DB110532 Power circuit connection DB110531 For an ambient temperature of 40 °C, the temperature inside the cubicle can reach 55°C. Sizing current The connection cables to the power factor correction cubicle must be sized for the following maximum continuous currents Imp: Model Classic Comfort Harmony 135 Hz Harmony 190 Hz Harmony 215 Hz Imp 1. 36 In 1. 50 In 1. 10 In 1. 19 In 1. 31 In Fig. 20: power connection to circuit-breakers (A3 bis, A4 bis, A2 Harmony). 22: power connection to terminal blocks. Minimum sizing rules not taking into consideration any correction factors: temperature, installation method. Power factor correction cubicle nominal current: In = Q where U = mains supply voltage Q = reactive power U3 of the cubicle DB110597 Fig. 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. 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 Varlogic RT6 manual. AAV31918_00 11 Commissioning (cont. ) Automatic setting of the C/k value To start the C/k setting process, simultaneously press the UP and DOWN keys. DB108812 DB110549 Setting cos Start the SET menu by pressing the SET key for 3 seconds. AUtO Display Use the UP and DOWN keys to select the cos LED. The cos symbol is displayed. Select the cos setting by pressing the SET key. The previously configured value is displayed. Choose a value between 0. 85 and 1. 00 using the UP-DOWN keys. When the target value is displayed, save it by pressing the SET key. The RT6 then goes back to its normal operating mode. Selecting the transformer primary current Start the SET menu by pressing the SET key for 3 seconds. DB108814 DB110550 AUtO Display Select the CT LED using the UP-DOWN keys. The previously configured CT value is displayed. Choose a value between 5 and 10, 000 using the UP-DOWN keys. When the target value is displayed, save it by pressing the SET key. The RT6 then goes back to its normal operating mode. 12 AAV31918_00 Commissioning (cont. ) Varlogic NR6/NR12 faults and solutions An operating problem, when commissioning a capacitor bank, can generally be diagnosed from the information supplied by the controller. Controller display No display Possible causes b no supply to controller Solutions v check for voltage at the controller's terminals v if there is no voltage reading, check circuit continuity from the source: wiring, fuses, etc. Overcorrection If the system is still capacitive despite having switched-out all the capacitor steps, the "OVER COMPENSATION" LED lights-up and the alarm relay is activated after 1 minute. 14 AAV31918_00 Maintenance DB110696 Personnel protection Each capacitor is fitted with discharge resistors which reduce terminal voltages to 50 V one minute after de-energising. Before carrying out work on the equipment: b remove its power supply b wait until the compulsory discharge time has elapsed b ensure each capacitor has been fully discharged by short-circuiting and earthing the contactor terminals. Discharging the capacitors Fig. 25: on-line break. Warning: refer to the capacitor bank's electrical diagram to identify the coupling mode between the contactor and the capacitor. [. . . ] 25: on-line break. Warning: refer to the capacitor bank's electrical diagram to identify the coupling mode between the contactor and the capacitor. To ensure capacitor discharge, successively short-circuit terminals: AB, AC and BC b break the triangle links (Fig. 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. [. . . ]