SineWave - Installation rules

1. SineWave - Installation rules www.mgeups.com T H E U N I N T E R R U P T I B L E P O W E R P R O V I D E R

2. Site audit  A site audit is important in that it helps avoid technical and commercial problems in subsequent phases.  The major points dealt with: - identification of needs (remember, not all problems are related to harmonics) - definition of goals with the customer - measurement of harmonics in the installation (if possible) - preparation of a single-line diagram (sources, protection, loads, cable lengths, etc.) - selection of SineWave installation points - floorspace and volume available for installation - installation of protection circuit breakers, taking into account discrimination with upstream circuit breakers - installation of sensors in the switchboards, taking into account the need to de-energise - evacuation of heat losses - zones sensitive to noise and vibrations

3. Installation constraints  Provide at least 300 mm for evacuation of hot air  No adjacent heat sources  Temperature of incoming air must be < 40°C  25°C advised because service life  as temperature   No heat sources under the unit (windings, transformers, power resistors, etc.)  Provide a clearance of at least 300 mm for air input  Provide sufficient space for maintenance Heatsource

4. Installation constraints  Do not install two SineWave units one above the other on a wall (the top unit will draw hot air produced by the bottom unit)

5. Installation constraints in a cabinet  Do not use a cabinet rated IPx1x or IPx2x (plain roof)  Allow for the free flow of hot air (vented roof)  Install a deflector between the two units (standard option)  Provide sufficient air input for cooling (> 2000 m3 / hr)  Provide sufficient space for maintenance

6. Environmental constraints  Do not install SineWave in locations where noise can be a problem (public premises, offices, etc.)  Do not install SineWave in a closed space (unventilated technical duct, false ceilings, etc.)

7. Environmental constraints (cont.)  Do not install SineWave in areas with conducting or aggressive dust (e.g. containing hydrocarbons) such as parking lots, road tunnels, etc.)  Do not install SineWave in rooms with high levels of dust (SineWave degree of protection is IP305, protected against particles > 2.5 mm)  Periodically clean the ventilation grates (depending on the level of dust)

8. Installation of the sensors  The sensors must always be installed downstream of the SineWave connection point  The sensors must be correctly installed (see the manual)  The wires of each sensor must be twisted and marked  Do not connect the secondary windings to the exposed conductive parts ( S2 connected to 0V and the neutral)  Sensor wires must not run next to power conductors  ! Install a device to short-circuit the current sensors (replacement of a unit or board)  Sensors can be supplied and installed before the SineWave units (short-circuitable terminal block is indispensable)  Up to three sets of identical sensors can be installed in parallel to eliminate harmonics on circuits ! Contact us for information on selecting the rating

9. Sensor selection ! System performance is guaranteed on the condition that the sensors supplied with the SineWave are used  SineWave is normally supplied with MGE split toroids (600/1 rating)  MGE split toroids rated 2000/1 are also available as an option  The other recommended ratings are available in closed toroids  The sensor rating depends on the rms value and the peak value of the load currents requiring processing  ! Always use the rating indicated in the selection table or the next highest rating

10. Short-circuit protection  Selection of protection devices depends on local standards (breaking capacity, system earthing arrangement, neutral protection and interruption, etc.)  ! Computer loads, I_neutral <= 3 x I_phase  A discrimination study is required (CB2 must open before CB1)  If discrimination is not ensured, select a lower SineWave rating (parallel connection) or install a faster protection system (ultra fast fuses) ! 90 A and 120 A SineWave units are protected by two circuit- breakers (one per 45 A or 60 A power module)

11. SineWave + passive-filter combination  Install the current sensors downstream of the passive filter tuned to H5  Do not condition H5

12. Neutral connection  Connect the neutral to SineWaveand set SineWave to "neutral distributed" if this is the case, whatever the type of load conditioned (computers, variable-speed drives, etc.)  Set to "neutral not distributed" if the neutral is not distributed. ! An inductor must be installed in the unit (option) to recreate an artificial neutral

13. Capacitors for power-factor correction  Power-factor correction capacitors must always be connected upstream of the SineWave connection point

14. Special loads  Do not condition lighting with a compensated ballast (very capacitive load, risk of resonance with Ls)  Do not condition variable-speed drives without a smoothing inductor (unstable load). Addition of an inductor reduces harmonic pollution by half

15. Setup  Except in special cases, the band width should be reduced to a strict minimum. For most applications, it can be limited to H13 and even H9  Type 2 (for tests in the factory) must never be used (risk of serious malfunctions)  Except in special cases, filtering should not be used (+32, +64, +96)