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PRD_LPS_31E_8K0_20K_1GB_V021.doc
Product Description
LP 31 Series
1. INTRODUCTION
The
LP 31 Series / 8 – 10 – 15 - 20 kVA
UPS series is a compact, truly On-line 3-phase in 1-phase out
system which incorporates the most advanced power electronics technology to provide exceptional
protection for electrical equipment.
2. FUNCTIONAL EXPLANATION
2.1 Principles of Operation
The UPS stores electric energy in batteries housed in the unit.
This allows the system to supply output power even when the incoming mains power is cut off
completely.
Energy is stored as Direct Current (DC), but input and output energy must be Alternating Current (AC) in
sine wave form.
The UPS therefore contains an input converter (AC to DC) and an output converter (DC to AC) (Figure 1).
The
LP 31 Series / 8 – 10 – 15 - 20 kVA
UPS is a SECOND GENERATION On-line UPS with:
• battery not in line with the DC link, resulting in:
- enhanced battery life;
- optimal battery charging;
• full wave input converter with power factor correction;
• extremely wide input voltage and input frequency tolerance;
• output
converter
(inverter) using IGBT technology.
Figure 1 - Block diagram of the LP 31 Series / 8-10-15-20 kVA UPS, mains present
The UPS needs two separate mains:
One three phase + neutral input mains and a single phase bypass mains. The neutral is essential.
