AC Capacitors Input and Output Check
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| Illustration 1 | g02604916 |
AC capacitors input and output diagram without supply | |
Capacitors and Current Feature
| |
Input Capacitor per Phase | Output Capacitor per Phase |
|---|---|---|
| C in nominal | C out nominal | |
| 300kVA | 1 x 300µF | 2 x 400µF |
| 400kVA | 2 x 200µF | 2 x 500µF |
| 500kVA | 2 x 300µF | 3 x 400µF |
Without Supply Check
Sub-Assembly Visual Check
- Check for the presence of liquid traces on the exterior of each capacitor. Refer to Illustration 2 for examples of good and bad capacitors.
- Check that the power connection terminals are straight, even, parallel, and tight. Refer to Illustration 2 for examples of good and bad capacitors.
- Check the expansion area for expansion and distortion. Refer to Illustration 2 for examples of good and bad capacitors.
- Check the capacitor value with an ohmmeter. (OK with C= C nonimal +/- 5 percent )
- Make a short circuit on the capacitor to discharge the capacitor. Check the capacitor with an ohmmeter. The measurement must be greater than 1MW charge. When you reverse the polarization of the ohmmeter the value change less than - 1MW.
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| Illustration 2 | g02605156 |
With Supply Check
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| Illustration 3 | g02605177 |
AC capacitors input and output diagram with supply | |
Current value chart
Measurement Conditions :
- AC NORMAL = 400V 50Hz
- Inverter = 400V 50Hz
- Q5N = open (sans charge / without load )
Note: The measurements values have to be the same on each phase
Note: Table 2 gives the full capacitor current value
| INPUT CAPACITOR CURRENT per PHASE | OUTPUT CAPACITOR per PHASE | ||
|---|---|---|---|
| PFC (in manual mode) | |||
| OFF | ON | ||
| 300kVA | 23A | 60A | 76A |
| 400kVA | 30A | 76A | 98A |
| 500kVA | 46A | 122A | 135A (1) |
| ( 1 ) | In this case: if only one capacitor is faulty, the current will be around 118A (and not 135/3) |
Inverter-AC Bypass Sub-Assembly Check
Sub-Assembly Visual Check
- Check for traces of arcing or the presence of a short-circuit.
- Check the power connections.
- Check the plug-in connectors.
- Check for the presence of dust on the circuit board.
Ohmmeter Check Without Supply
300kVA / 400kVA
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| Illustration 4 | g02605479 |
300kVA / 400kVA (1) Mains bypass AC B3 PH3 (2) Mains bypass AC B2 PH2 (3) Mains bypass AC B1 PH1 (4) CSDT M2 board (5) CS R2 / M2 SS (6) CS OND / INV SS (7) CSDT INV board (8) A1 PH1 To CHOKES (INV) (9) A2 PH2 To CHOKES (INV) (10) A3 PH3 To CHOKES (INV) (11) C1 PH1 to the load (12) C2 PH2 to the load (13) C3 PH3 to the load | |
| Ohmmeter readings table | ||||
|---|---|---|---|---|
| C1 | C2 | C3 | ||
| A1 | OL | B1 | ||
| A2 | OL | B2 | ||
| A3 | OL | B3 | ||
500 kVA
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| Illustration 5 | g02605499 |
500 kVA (14) CSDT M2 board (15) CS R2 / M2 SS (16) Mains bypass AC B1 PH1 (17) Mains bypass AC B2 PH2 (18) Mains bypass AC B3 PH3 (19) CS OND / INV SS (20) A3 PH3 To CHOKES (INV) (21) A2 PH2 To CHOKES (INV) (22) A1 PH1 To CHOKES (INV) (23) CSDT INV board (24) C3 PH3 to the load (25) C2 PH2 to the load (26) C1 PH1 to the load | |
| Ohmmeter readings table | ||||
|---|---|---|---|---|
| C1 | C2 | C3 | ||
| A1 | OL | B1 | ||
| A2 | OL | B2 | ||
| A3 | OL | B3 | ||
Thyristor Check with Ohmmeter
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| Illustration 6 | g02606364 |
PFC – Inverter – Chopper - BN Sub-Assemblies Check
Without Supply Check
Sub-Assembly Visual Check
- Check for traces of arcing or the presence of a short-circuit.
- Check the power connections.
- Check the plug-in connectors.
- Check for the presence of dust on the circuit board.
PFC / Chopper / Inverter Module : Ohmmeter Check Without Supply
Note: Disconnect the wiring to the PFC/INV/Chopper choke
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| Illustration 7 | g02606597 |
PFC / Chopper / Inverter Module : Ohmmeter Check With Supply
Use the manual mode with UPS Display
Check the MUTxN boards
See the manual mode guide
Supply Measurements on the Electronic Boards
DIGIT Board
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| Illustration 8 | g02606797 |
GDET Board
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| Illustration 9 | g02606798 |
INPUT Board
Note: The ALBT board is supplied by the DC bus (800V) or by the wiring kit in manual mode (UPS Display)
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| Illustration 10 | g02606801 |
External Synchronization Installation
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| Illustration 11 | g02608397 |
External synchronization kit (16) SYNIN board (17) Ties (18) Q5N connection cable (19) ALIN XF8 connection cable (20) EXPUT XF24 connection cable (21) Synchronization cabinet or parallel UPS cabinet connection cable (22) Manual | |
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| Illustration 12 | g02608400 |
UPS cabinet switches (23) Q3BP (24) Q1 (25) Q4S (26) Q5N | |
- Place the UPS in maintenance mode.
- Switch Q3BP (23) to the ON position if necessary.
- Make sure that Q1 (24), Q4S (25), Q5N (26) and QF1 are in the OFF position.
- Use the mounting the screws to attach the SYNIN board to the UPS unit. Refer to Illustration 14.
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| Illustration 13 | g02608437 |
Location of SYNIN board in UPS cabinet | |
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| Illustration 14 | g02608436 |
Note: Check for the lack of voltage before mounting the kit.
- Route the Q5N connection cable (18) as shown in Illustration 15.
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| Illustration 15 | g02608456 |
- Connect blue cable (Q5N-N) to neutral.
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| Illustration 16 | g02608460 |
- Connect brown cable (Q5N-L1) to phase1.
- Route the ALIN (19) and EXPUT (20) connection cables on top of the cabinet and in the inner cabinet. Use cable ties to secure the cables.
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| Illustration 17 | g02608477 |
- Remove the ALIN protective cover.
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| Illustration 18 | g02608937 |
- Route the XF8 cable (19) through the ALIN cover.
- Connect XF8 cable (19) to the XMA8 connector on the ALIN board.
- Install the access cover for the ALIN board. Use cable ties to secure the XF24 cable (20) to the cover.
- Connect the XF24 cable (20) to the XM24 connector on the EXPUT board.
- Personalize the UPS by setting the external synchronization source to "ON" or "YES".
- Power off the UPS. Restart the UPS.