LV CAPACITOR BANKS WITH STATIC
SWITCHING
EMK SERIES
INSTRUCTIONS MANUAL
M98118701-03-19A
CIRCUTOR, SA
Page 1: ...LV CAPACITOR BANKS WITH STATIC SWITCHING EMK SERIES INSTRUCTIONS MANUAL M98118701 03 19A CIRCUTOR SA ...
Page 2: ...the risk of fire Carefully read the manual prior to connecting the equipment Follow all the installation and maintenance instructions for the equipment throughout its working life In particular follow the installation standards indicated in the Low Voltage regulations and additional technical instructions The installation operation and maintenance of LV equipment must only be carried out by author...
Page 3: ...0 5 3 CONNECTION OF THE CAPACITOR BANK TO THE GRID 10 5 3 1 Power circuit 11 5 3 2 External isolation and protection elements 11 5 3 3 Auxiliary control voltage 11 5 3 4 Earth cable connection 11 5 3 5 Connecting the current transformer CT 11 6 STATIC CAPACITOR BANK START UP 13 6 1 BEFORE START UP 13 6 2 START UP 13 6 3 TESTS ONCE THE CAPACITOR BANK IS CONNECTED AND THE REGULATOR HAS BEEN ADJUSTED...
Page 4: ...tenance and before re applying the power supply to the unit check that its enclosure is properly closed and that no items or tools were left inside that could cause a short circuit Do not open the secondary circuit of current transformer without short circuiting it first The operation of a current transformer with an open secondary will cause an overvoltage that can damage it and electrocute the p...
Page 5: ...talled it must be stored at a location with a firm and level floor and the storage conditions listed in the technical features section must be observed In this case it is recommended that the equipment be stored with its original protective packaging To move the equipment a short distance the unit s base support profiles facilitate handling with a pallet jack or forklift The centre of gravity of s...
Page 6: ... water Avoid hot spots maximum environmental temperature 45 ºC Avoid saline and corrosive environments Avoid storing the equipment in areas where a lot of dust is generated or where the risk of chemical or other types of contamination is present Do not place any weight on top of the equipment cabinets 4 Technical features 4 1 Label with the equipment s features The label with the equipment s featu...
Page 7: ...es gL curve minimum calibre 1 5 In Capacitor features Capacity tolerance 10 Insulation level from earth 3 kV 50 Hz Impulse test 15 kV ray type wave 1 2 50 µs Protection elements Internal fuses and over pressure system Compliance with Standards EN 60831 4 3 Environmental Features Capacitor max temperature Category C in accordance with EN 60831 1 Maximum for 1h 50ºC 24h average 40ºC Annual average 3...
Page 8: ...nents Fig 4 3 shows the different models of EMK static capacitor banks and their essential components Note that some protection elements are optional and others may be replaced with equivalent models or adapted to the specific application Fig 4 2 EMK Capacitor bank components ...
Page 9: ...s shown in Fig 4 3 and in more detail in the simplified wire diagram in section 10 CPC controllers are powered with an auxiliary voltage Uaux The standard CPCs are mainly used for networks with Umax 440 V nevertheless they have a dual voltage supply circuit able to be supplied at a rated voltage of 230V or 400 V 10 There are special controllers type CPC3i which are designed to operate on networks ...
Page 10: ...ended that a separation of 10 cm be maintained between adjacent equipment On wall hung cabinets it is recommended that at least 20 cm of separation should be maintained between the sides of adjacent equipment NOTE Static units have one or more aluminium heatsinks for cooling the thyristors Periodically clean these heatsinks with a brush or with compressed air and ensure that they have maximum vent...
Page 11: ...he capacitor bank For more details about the connection of the CT see paragraph 5 3 5 5 3 3 Auxiliary control voltage The auxiliary control circuits include those related to the power supply of the CPC controllers and other control or protection devices and ventilation units The CPC controllers up to 400 V usually are supplied at 400 VAC from phase to phase voltage In other applications supplied a...
Page 12: ...r the installation s main switch To prevent excessive attenuation of the CT signal the minimum cross section of the cable connecting the secondary of CT to terminals S1 S2 in the capacitor bank must be at least 2 5 mm2 Fig 5 2 CT and neutral connection terminals if required Once the CT cables are installed disconnect the jumper connecting terminals S1 and S2 on the capacitor bank see Fig 5 3 Fig 5...
Page 13: ...esonance with the installation s power transformer could occur thus causing strong over currents 6 2 Start up Safety Apply the safety regulations listed in section 2 of this manual before operating the equipment The standards Electric Code Regulations and other applicable laws of the country where the capacitor bank is installed or operated should be strictly followed Ensure the inner circuit brea...
Page 14: ...ed the nominal value 10 IEC 60831 1 Check the current absorbed by each capacitor step Under normal working conditions it must be close to the nominal values see Table 7 4 and never more than 1 3 times this value A permanent consumption in all the capacitor steps over the nominal value may be caused by the presence of harmonics in the grid or by an excessively high power supply voltage Both circums...
Page 15: ...unbalance greater than 15 Annually Check the capacitor s microfarads of the different steps An indirect verification can be performed by checking that the consumption matches the value stated in Table 7 4 with a maximum deviation of 10 Check the tightness of all terminal connections on the different power elements Inspection of the fuses Power circuit NH fuses Check continuity and temperature Cont...
Page 16: ...on pluggable regulators Check that the terminals are tightened properly The recommended torque is 0 6 Nm 7 2 6 Cleaning the cabinet Remove any solid particles Clean the inside of the cabinet Clean ventilation grilles 7 3 Maintenance with the capacitor bank connected Check that the main switch turns on and off without having to force the mechanism If there is individual earth leakage protection for...
Page 17: ...of degradation of the capacitors These must be replaced with a suitable spare part if these symptoms are detected in a step When the consumption of the steps is 10 more than stated in Table 7 4 this can be caused by the presence of resonances If this is detected measure the THD V of network voltage should be below 5 7 3 1 Regulator Checkings Refer to the manual of the specific regulator used in th...
Page 18: ...orption of harmonic currents Therefore special care must be taken to not surpass these usage conditions CIRCUTOR accepts no liability for possible damage to equipment or other parts of the installation therefore it will not cover any possible penalties resulting from possible failure improper installation or improper usage of the equipment Consequently this guarantee does not apply to failures occ...
Page 19: ...EMK series Instructions Manual M98118701 03 19A 19 10 TYPICAL DIAGRAM of ONE STEP ...
Page 20: ...EMK series Instructions Manual M98118701 03 19A 20 11 Declaration of conformity ...
