1 Mario Sedita - INFN-LNS (Italy) - Power Supplies EMI Cabling Elimed - Elimaia Technical Workshop Harfa - Prague 9 June

2 Mario Sedita - INFN-LNS (Italy) - Magnetic Elements Power Supplies Magnetic Elements (electrical characteristics related to impedance values to be confirmed from constructor) 4 Dipoles 315A/35V 2 Quadrupoles 200A/30V 2 Steerers 10A/±20V. Each Steerer requires, for normal working, two power supplies as is based on two coils for the x axis and two coils for the y axis. 2

3 Mario Sedita - INFN-LNS (Italy) - Power Supplies Characteristics A very general introduction 3

4 Mario Sedita - INFN-LNS (Italy) - Dipoles and Quadrupoles PS Electrical Characteristics and Cabling estimated 4 Magnetic Element Max V magnet Max I magnet Power Magnet (W) Imag. + I cycling 20% Vout + Vdrop Cable section FG7H2R Total Power (W) Dipole mm Quadrupole mm Steerer2 x mm 2 2 x 288 DC AC Magnetic Element Power Total (W) Power AC kV/A I phase AC A Cable mm 2 Cable Type Dipole FG7H2R 4x16 mm 2 Quadrupole FG7H2R 4x10 mm 2 Steerer2 x FG7H2R 3x4 mm 2

5 Mario Sedita - INFN-LNS (Italy) - Dipoles and Quadrupoles PS General Characteristics to be confirmed 1. Position of Magnetic Elements, Layout to be confirmed for cable lenght 2. Family Magnetic elements in series? 3. Regulation Topology (Linear, Switching)? 4. Magnetic Field Loop or Current Loop? 5. Stability (after a warm-up time ≤ 30 min): Vs. Time: (examples) Over 30 min ≤ 50 ppm Over 8 hours ≤ 100 ppm Vs. Temperature: Environment ≤ 50 ppm/°C Cooling Water ≤ 50 ppm/°C Vs. mains variation of ± 10% slow, ± 1% fast: ≤ 10 ppm Vs. load variation of 10%: ≤ 100 ppm 6. Voltage/Current Rise Time TBD. 7. Output Current Ripple of ± * mA? 8. Cooling water 20 °C ± 2 °C? 9. Conductivity µS? 10. Cooling Water Pressure 3.5÷5 Bar? 11. Ambient Temperature 0 to +40 °C 12. In case of water cooling all the water pipe must be in AISI 316 or copper? 13. Floating output 5

6 Mario Sedita - INFN-LNS (Italy) - Steerers PS General Characteristics to be confirmed 1. Normal Operation Range 0 to 100% f.s. in both positive or negative polarity. 2. Cooling water, if necessary, 20 °C ± 2 °C 3. Cooling Water Pressure 3.5÷5 Bar 4. Output Voltage Ripple ≤ 10 mV pp. 5. Output Offset current at 0 Amp. must be ≤ 1 mAmp. 6. Linear regulation topology with series transistor bank. 7. Accuracy 1 × Resolution 12 bit. 9. Stability class ± 100 ppm (8 hours). 10. Output current thermal drift 100 ppm/°C. 6

7 Mario Sedita - INFN-LNS (Italy) - Power Supplies Interlock System main characteristics 7 1. Input ac line fuse failure. 2. Phase unbalanced, phase loss, phase reversal. 3. DC over-current. 4. Load mismatch. 5. Air-flow failure (if used). 6. Water flow failure. 7. SCR over-temperature. 8. Rectifier transformer over-temperature. 9. SCR failure (fast fuse). 10. Filter choke over-temperature. 11. Cabinet over-temperature. 12. Cabinet door open. 13. Transistor bank over-current. 14. Transistor bank over-temperature. 15. Transistor bank failure. 16. Transistor failure. 17. Spare external interlocks (at least two).

8 Mario Sedita - INFN-LNS (Italy) - Power Supplies Control System Main Characteristics 8 Communication Protocol The following functions must be implemented and displayed on the controller: 1. SET ADDRESS: selects the power supply address. 2. SET DC ON/OFF: the power supply operational mode is switched on/off. 3. SET CURRENT: the DAC is set with the properly accuracy. 4. SET POLARITY: changes the current direction if foreseen on the power supply. 5. READ CURRENT ADC: the actual value is displayed with the proper resolution. 6. READ VOLTAGE ADC: the actual value is displayed with the proper resolution. 7. READ DAC: the actual current set point is displayed with the proper resolution. 8. READ LIMITS: the full voltage/current range of the power supply is displayed. 9. READ STATUS: the actual power supply status is displayed. 10. READ ALARM: the actual power supply interlocks status is displayed. 11. RESET: resume the interlock system status. 12. LOCAL/REMOTE: a key switch on the front panel to enable or disable the local control. The key switch defines the status of the front panel only. In LOCAL position all setting commands are processed and forwarded to the addressed power supply. In REMOTE position only reading access is possible for any power supply 13. GLOBAL OFF: the entire power supply system is switched off through each circuit breaker (delay thyristors pulses first, block transistor regulator, set reference to zero, suppress thyristor pulses). 14. DC OFF: supplies all the low-level controls, interlocks and regulating circuits (main contactor open, electronics inhibited and reference set to zero). 15. DC ON: closes the mains contactor with soft start to have the power supply ready to delivery the output current on the load under normal operating conditions. 16. RESET: resume to DC OFF status after faults are cleared. Accidental depression of this button in DC ON status must not affect the power supply status.

9 Mario Sedita - INFN-LNS (Italy) - Power Supplies Applicable Standards 1. CEI 11-1 Distribution system of electric power 2. CEI 14-4 (CENELEC HD 398,IEC 76) Power transformers 3. CEI 17-5 (CENELEC HD 418,IEC 157) L.V. circuit breakers 4. CEI (CENELEC HD 422,IEC 408) L.V. switches 5. CEI (CENELEC HD 420,IEC 337) Auxiliary equipment 6. CEI (CENELEC EN 60439,IEC 439) L.V. assemblies 7. CEI (CENELEC HD 383,IEC 228) Insulated cables 8. CEI Fire retardant insulated cables 9. CEI 22-5 (IEC 478) Power supplies, dc output 10. CEI 32-1 (CENELEC EN ,IEC 269) Low voltage fuses 11. CEI 38-1 (IEC 185) Current transformer 12. CEI 41-1 (IEC 255) Electrical relays 9

10 Mario Sedita - INFN-LNS (Italy) - Mains Line UPS Network 10

11 20kV TR BR 400V PS Ground Mario Sedita - INFN-LNS (Italy) - Power Supplies Mains Line Network 400 V - 50 Hz will be used to feed the power supplies and its electronics. Its main characteristics are: 3-phase without neutral: 400 V phase to phase ± 10 % Last mains variation : ± 1.5 % Frequency variation : ± 2 % Neutral with one-point directly connected to ground (see Fig.) Distributed earthing circuit This distribution system complies with norms CEI 64-8 and CENELEC HD 384 for TN-S distribution systems. 11 TR = HV/LV Transformer BR = Protection Breaker PS = Power Supply or Equipment

12 Mario Sedita - INFN-LNS (Italy) - UPS Mains Line Network Backup generator capable of providing power to critical loads during an extended utility source outage and/or instances where the user has selected backup generator operation, could be required for the auxiliary, control and security system. 12

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14 Mario Sedita - INFN-LNS (Italy) - EMI What happen during the shot? 14

15 Mario Sedita - INFN-LNS (Italy) - Electronics and signal grounding Particular attention will be devoted to the ground connection system, to prevent influence during the Laser pulses due to the following effects: Irradiated electromagnetic interference Electrostatic discharge Fast transient/burst In order to calculate EMI filters for I/O related to: power, signals and controls, an energy and frequency spectrum simulation and estimation characteristics are required. Is a separated safe area present for Electronics, Power Supplies and Control System? 15 ? Ground and shielding must be taken into account carefully.

16 Mario Sedita - INFN-LNS (Italy) - Cabling Grounding 16

17 Mario Sedita - INFN-LNS (Italy) - PS Cabling The cables to be used for power, AC/DC, is fixed in FG7H2R: Rated voltage 0.6/1KV. Test voltage 12 KV DC, 4 KV AC. Working temperature -25 ÷ +90 °C. Max temperature Short Circuit, 250 °C (5 sec.) Min. Bend. Radius UNEL 35375: 4 x outer diameter. Fire retardant. Standard: CEI Flexible copper class 5 IEC HEPR elastomeric compound type G7 Extruded filler Copper braid screen PVC Rz

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