ARTronic ARTon Plus series Service Training Manual Download

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1.5.5 ADVS01-R1 DC-3 PHASE AC VOLTAGE SAMPLE BOARD

This board accepts the inverter output voltages and bypass input voltages of the UPS and sends suitable
AC and DC feedback signals to the main controller (P3MC-R5) board for measurement and control.

Basic Functions of ADVS01-R1

Inverter output voltages (phase-neutral) are connected to CN2. The inverter output voltages are

stepped down and level shifted by the transformers T1, T2 and T3 and they are fed back to the main
controller board P3MC-R5 through CN3 of ADVS01. These signals are used for measurement and
control of nverter output voltages and their waveforms.

  - CN2-1   :  Inverter output T-phase (220-230V AC to T3 through the fuse F1)
  - CN2-2   :  Inverter output S-phase  (          ‘’               T2             ‘’            F2)
  - CN2-3   :  Inverter output R-phase  (           ‘’              T1              ‘’           F3)
  - CN1-1   :  Inverter output Neutral

The inverter output voltages connected to CN2 are divided down, by resistors, to a suitable level and

directly connected to the main controller board through CN7 of ADVS01. These dc-coupled inverter
output voltage samples are used to eliminate any possible DC voltage components of the AC outputs
after performing DC balance adjustments using VR1, VR3 and VR5 on the main controller board
(P3MC-R5).

The DC components of the inverter output voltages coming to CN2 are checked continuously and if

the magnitude of this DC component is greater than +/-3Vdc then a ‘’DC Balance Failure’’ signal is
produced and sent to the main controller board (P3MC-R5) via CN7-Pin12 of ADVS01-R1 board.
When this fault signal is produced, LD1 (red LED) is turned on. The ‘’DC fault’’ signal is available on
CN9 and any other external fault signal can be connected in parallel with this signal (e.g. the ‘’output
fault’’ signal coming from CN2 of STM01 board is connected to CN9 of ADVS01 board) to act in the
same way.

Bypass input voltages (phase-neutral) are connected to CN4. The bypass voltages are stepped

down and level shifted by the transformers T4, T5 and T6 and they are transferred to the main
controller board P3MC-R5 through CN3 of ADVS01. These bypass voltage samples are used for
measurement and synchronization on the main controller board.

  - CN4-1   :  Bypass input T-phase (220-230V AC to T6 through the fuse F4)
  - CN4-2   :  Bypass input S-phase (       ‘’           ‘’     T5      ‘’            ‘’       F5)
  - CN4-3   :  Bypass input R-phase (       ‘’           ‘’     T4      ‘’            ‘’       F6)
  - CN1-3   :  Bypass Neutral

Note:

Since inverter output and bypass Neutrals are the same in ARTonPlus Series UPSs, J1 jumper

is always short-circuited.

The NO contact of the RL1 relay on ADVS01 board is connected in series with the NO contact of the

RL1 relay on the SDXC300-R1 board. These relays are used for energizing the coil of the nverter
output contactor (K2), and if any one of those relays is turned off, then the inverter output contactor is
de-energized too.

When a ‘’DC balance failure’’ signal is produced on the ADVS01 board, RL1 relay on this board is

turned off and the inverter output contactor (K2) is de-energized to prevent any DC voltage to reach
UPS output. To enable this protection, JP1 on this board should be inserted (JP1 = ‘’1’’).

The same function is also performed by the controller software when the ‘’DC fault’’ signal is received

by the main controller board (this time by turning off RL1 on SDXC300-R1 board).