RED3320S-E UPS, 20 kVA / 20 kW – Internal Batteries
20 kVA / 20 kW three-phase double-conversion online tower UPS for UK and IEC markets, with batteries fitted internally for short autonomy. Efficiency up to 94.5 % (up to 98.2 % in ECO mode); part of the RED3300-E Series.
- True online double conversion with DSP control
- Output power factor 1.0; accepts 100 % unbalanced load
- Efficiency up to 94.5 %, up to 98.2 % in ECO mode
- Internal VRLA batteries — no separate battery cabinet needed
- Wide input range 208–478 Vac, 40–70 Hz; THDi ≤ 3 %
- N+X parallel redundancy, up to 4 units
Overview
The RED3320S-E is the 20 kVA standard (S) model in the RED3300-E Series of three-phase in / three-phase out, true double-conversion online UPS, rated at 380/400/415 Vac for the UK and other IEC markets.
The standard build carries its batteries internally for short autonomy, in a 250 mm-wide tower cabinet.
Battery autonomy, string configuration and battery cabinet selection are sized per project — contact us with your load and runtime requirements. Figures are typical values for reference only; specifications are subject to change without prior notice.
- Rated power
- 20 kW
- Input voltage
- 400 V
- Output voltage
- 400 V
- Battery
- VRLA
- Redundancy
- Parallel · N+1
- Market
- United Kingdom · Global
Specifications
Model
- Model code
- RED3320S-E
- Build
- Standard (S) — batteries fitted internally
- Rated power
- 20 kVA / 20 kW
- Dimensions (W × D × H)
- 250 × 900 × 868 mm
- Weight
- 187 kg (2 × 20 × 9 Ah)
- Noise
- < 58 dB
- Charging current, max.
- 2.7 A
Electrical
- Topology
- Online double conversion, three-phase in / three-phase out, DSP control
- Nominal input / output voltage
- 380/400/415 Vac, 3-phase + N + PE
- Input voltage range
- 305–478 Vac (full load); 208–478 Vac (50 % load)
- Input frequency range
- 40–70 Hz
- Input power factor
- ≥ 0.99
- Input current distortion (THDi)
- ≤ 3 % (linear load)
- Output power factor
- 1.0 (100 % unbalanced load)
- Voltage regulation
- ±1 %
- Output voltage distortion (THDv)
- ≤ 2 % linear load; ≤ 5 % non-linear load
- Output frequency
- Line mode: ±1 / ±2 / ±4 / ±5 / ±10 % of rated (selectable); battery mode: 50/60 Hz ±0.1 %
- Crest factor
- 3:1
- Bypass voltage range
- Max. 220 V +25 %, 230 V +20 %, 240 V +15 % (lower limits optional); min. −45 % (−20 %, −30 % optional)
- Bypass frequency range
- 50/60 Hz ±10 %
- Overload — AC mode
- ≤ 110 % 60 min; ≤ 125 % 10 min; ≤ 150 % 1 min; > 150 % immediate transfer to bypass
- Overload — battery mode
- ≤ 110 % 10 min; ≤ 125 % 1 min; ≤ 150 % 5 s; > 150 % immediate shutdown
- Efficiency — AC mode
- Up to 94.5 %
- Efficiency — ECO mode
- Up to 98.2 %
- Parallel
- N+X redundancy, up to 4 units
Battery
- Battery type
- VRLA (maintenance-free lead-acid), internal
- Battery configuration
- ±120 Vdc, 2 × 20 × 12 V 9 Ah (2 × 20 × 7 Ah or 3 × 20 × 7/9 Ah optional)
- Charging current, max.
- 2.7 A
Environmental
- Operating temperature
- 0–40 °C
- Storage temperature
- −25 to 55 °C (without battery)
- Relative humidity
- 0–95 % (non-condensing)
- Altitude
- < 1000 m ASL; derating required above 1000 m
Communications & features
- Interfaces
- USB, RS-232, RS-485, parallel port, dry contact, intelligent slot
- Options
- SNMP card, dry-contact card, battery temperature sensor
- Display
- Segment LCD standard; 2.4" TFT or 7" colour LCD optional
- Functions
- ECO mode, cold start, 50/60 Hz frequency-converter mode, self-test at start-up, intelligent fan speed control
- Protection
- Short circuit, overload, over-temperature, battery overcharge and over-discharge, output low voltage, fan fault alarm
Standards
- Safety
- IEC/EN 62040-1, IEC/EN 62477-1
- EMC
- IEC/EN 62040-2 (IEC 61000-2-2, -4-2, -4-3, -4-4, -4-5, -4-6, -4-8, -4-11)
- Performance
- IEC 62040-3:2021, EN IEC 62040-3:2021
Certification & warranty
Certification
Designed and tested to IEC/EN 62040-1 (safety), IEC/EN 62040-2 (EMC), IEC/EN 62040-3 (performance) and IEC/EN 62477-1. EMC certificates of conformity (EMC Directive 2014/30/EU; EN IEC 62040-2:2018, EN 61000-3-12:2011, EN 61000-3-11:2000) cover the 10–20 kVA models (certificate ES201225018E) and the 30–40 kVA models (certificate ES201225020E). Copies are available on request.
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