Pyramid DSP Manual de instalación descargar pdf (Pagina 6)

• Remote monitoring Panel (Optional)

• RS232 port multiplexer (Optional)

• MODBUS adapter (Optional)

• Diagnostic and adjustment via PC.

1.2 Design Concept

Figure 1.1 Block Diagram Of The UPS

S1 (F1-F2-F3) : Rectifier Input Switch / Fuses

S2 (F4-F5-F6) : Bypass Input Switch

S3 : Maintenance Bypass Switch

S4 (F7-F8-F9) : Output Switch

S5 (F10-F11-F12) : Battery Switch / Fuses

K1 : Rectifier Input Contactor

K2 : Inverter Output Contactor

DESCRIPTION OF BLOCKS

RECTIFIER: In PDSP Series UPSs, a PWM controlled IGBT rectifier is used to increase input power factor

(PFC) and to decrease input current harmonics (THDI).

The IGBT rectifier accepts 3-phase AC input and produces a dual polarity DC voltage for both supplying the

inverter and charging the batteries.

BATTERIES: Batteries are used as reserve DC power supply for the Inverter in case of mains failure. In

PDSP Series, batteries are connected in series with a center-tap output to obtain a dual polarity DC supply.

Batteries are discharged by the inverter during mains failure. The discharged batteries are re-charged by the

IGBT Rectifier on a constant current / constant voltage basis, if AC mains power is available.

INVERTER: It is manufactured by using the latest IGBT technology and Pulse width Modulation (PWM)

technique. The Inverter converts the DC BUS voltage supplied by the IGBT Rectifier and / or the batteries into

a well regulated 3-phase AC voltage with fixed voltage and frequency.

The output of the inverter is used to supply the critical loads connected to the UPS output.

Rectifier /

Charger

3 PHASE

MAINS I/P

Battery

(Dual Polarity)

Maintenance Bypass Switch

Static Bypass

(F4-F5-F6)

(

F1-F2-F3

)

(

F10-F11-F12

)

(F7-F8-F9)

Inverter

3 PHASE

AC Output

1 2 3 4 5 6 7 8 9 10 11 ... 37 38

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Pyramid DSP Manual de instalación Pagina 6

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