UPS Legrand KEOR DK 311342 3000 (2U)

Description of UPS Legrand Keor DK 311342

UPS Legrand KEOR DK 311342 (2kVA / 2kW - 2U) is a 1-phase Online Double Conversion (VFI-SS-11) UPS, part of Legrand's KEOR DK series - a high-end, reliable power solution for IT systems, security equipment, servers, and industrial applications requiring long backup time and high availability.

The 311342 version does not have an internal battery, allowing flexible connection to an external battery cabinet, significantly increasing backup time, while reducing weight and operating temperature in the rack environment.

Outstanding features:

• Real power 2 kW (PF = 1) - maximum load performance for technology equipment.
• On-line Double Conversion (VFI-SS-11) technology - absolute protection against voltage fluctuations, noise and voltage drops.
• 2U rack/tower convertible design, space-saving, suitable for 19” small depth cabinets.
• No built-in battery, ready to connect external battery cabinet to extend runtime as required.
• LCD touch screen + LED bar display, integrated automatic display AC sensor.
• High efficiency > 92%, ECO mode reaches 98%.
• Diverse communication: USB, RS-232, ROO, optional SNMP/BMS card.
• Comprehensive protection: EPO, backfeed protection, cold start, overload.
• Generator compatible, stable operation in harsh environments.

Specifications

Power & input / output

• Nominal power: 3000 VA / 3000 W (PF = 1)
• Technology: On-line Double Conversion (VFI-SS-11)
• Input voltage: 230 V (1 phase)
• Input voltage range: 176 – 280 V (at full load)
• Input frequency: 50/60 Hz ± 5% (self-detection)
• Input power factor: > 0.99
• Input current THD: < 5%
• Output voltage: 230 V ± 1%
• Output frequency: 50/60 Hz ± 0.1% (configurable via LCD)
• Output voltage THD: < 3% with linear load
• Crest Factor: 3:1
• Efficiency (AC/AC): ~92%; ECO Mode reaches ~98%
• Output Power Factor: 1.0

Battery & backup / charging time

• Battery type: VRLA - sealed, maintenance-free
• Battery configuration: No built-in battery (external battery model)
• Connection: Support external battery cabinet via dedicated DC port
• Nominal battery voltage: 72 VDC
• Backup time: Depends on type external battery cabinet
• Standard charging current: 2 A
• Extended charging current: Up to 8 A (via configuration option)
• Full charge time: 3 – 5 hours depending on battery pack capacity

Dimensions & environment

• Dimensions (W × H × D): 440 × 88 (2U) × 554 mm
• Weight: ~18 – 20 kg (excluding external battery pack)
• Mounting type: Convertible 2U rackmount / tower (with stand when standing)
• Operating temperature: 0 – 40 °C
• Operating humidity: < 95% RH, non-condensing
• Noise level (at 1 m): < 50 dBA
• Protection level: IP20
• Case coating: Anti-corrosion coating - anti-corrosion coating suitable for IT / light industrial environments

Management & Communication

• Display: LCD touch screen (Touch screen 3.5”–4.3”) + LED status bar
• Standard connection ports: USB, RS-232, ROO (Remote On/Off)
• Optional ports: SNMP/BMS card, Dry contact relay, External charger port
• EPO (Emergency Power Off) function: Available
• Backfeed protection: Yes
• Cold start: Yes (start from battery when grid power is lost)
• Remote management: Support via SNMP/Web interface when card is installed

Expansion & Accessories

• Parallel operation: Not applicable for 3kVA single-phase model
• Bypass: Internal automatic bypass (automatic); supports optional external manual bypass
• Genset compatibility: Yes
• Battery expansion: Supports external battery cabinet (connected via DC port)
• Optional accessories:
• Rack support kit
• External manual bypass switch
• SNMP/BMS communication card
• Dry contact card
• External charger (8A)
• Battery cabinet (capacity according to project requirements)

Standards & certifications

• Complies with international standards:
  • EN 62040-1 (UPS safety)
  • EN 62040-2 (Electromagnetic compatibility – EMC)
  • EN 62040-3 (Performance classification VFI-SS-11)
• Certification: CE / RoHS / IEC Certified
• Protection and EMC levels: Complies with industry standards for IT, telecommunications and security