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COMPACT SYSTEMS — Power to perform. Anytime.
UPS

Enterprise YD Series

A compact three-phase online UPS for data centres and server rooms — efficient, DSP-controlled and built to keep the batteries in reserve for real outages.

Range
10–80 kVA
Configuration
Three-phase in / three-phase out (3:3)
Topology
IGBT transformerless · full DSP digital control
Talk to our teamView specifications
COMPACT Enterprise YD 3300 Series three-phase transformerless online UPS tower on castors, three-quarter view
Overview

What it is

The YD 3300 Series is COMPACT's three-phase transformerless online UPS, built on an IGBT converter with 0.99 input power-factor correction and input current harmonics below 3%. A full DSP control system samples voltage, current and frequency fast enough to hold the output tightly under disturbance.

With an ultra-wide 208–478 V input window, a site may never actually draw on the batteries except for a complete outage. The range delivers pure RAS — reliability, availability, scalability — for data centres and server farms, from 10 kVA to 80 kVA.

Key capabilities

What it does

0.99 input power factor

IGBT front end with input current harmonics (THDi) below 3% — no oversizing of upstream gensets, cables or switchgear.

Ultra-wide input window

208–478 VAC operating range and 45–66 Hz frequency window; batteries are held in reserve for true outages.

0 ms output transfer

Mains-to-battery and mains-to-bypass transfers are both 0 ms.

Full DSP digital control

High-speed sampling of V / I / frequency for accurate output regulation and fast fault response.

Parallel for expansion or redundancy

Units can be paralleled to add capacity or to build redundancy; flexible DC-bus configuration.

Flexible battery string

Optional 16 / 18 / 20 battery blocks per string with intelligent charging management and battery-group optimisation.

Remote monitoring + EPO

SNMP / MODBUS monitoring and control; USB, RS485, parallel port and dry-contact interfaces; emergency power off.

100% unbalanced load

The output can meet a fully unbalanced three-phase load.

Why this product

The engineering value

Built for the demands of a data centre

NOC, storage, server farms and mission-critical medical equipment need reliability, availability and scalability engineered together — thermal design, paralleling and very high MTBF.

The batteries stay in reserve

The wide input window means ordinary supply excursions are handled by the converter, not by transferring to battery — extending battery life and reducing risk.

Smaller footprint

A transformerless IGBT design in a vertical form factor takes less floor space than an equivalent transformer-based system.

Applications

Where it fits

Typical applications for this range — not an exhaustive list.

  • Data centres and server farms
  • Network operations centres (NOC)
  • Storage infrastructure
  • Mission-critical medical equipment
  • Surveillance and networked IT
Technology

Online double conversion with a 0 ms transfer

The IGBT rectifier feeds a DC bus that is shared with the battery; the inverter continuously regenerates the three-phase output.

On mains failure the inverter keeps running from the battery with no transfer time. A static bypass is available for overload or service.

Online double conversion — the load never sees the raw mains
STATIC BYPASS (standby)GridUtility ACRectifierAC → DC · PFCDC busRegulated DCBatteryReserve energyInverterDC → ACCritical loadProtected output

The rectifier and inverter run continuously, regenerating a clean output. The battery floats on the DC bus, held in reserve — current is always flowing to the load.

Models & range

Model line-up

Real model designations and capacities transcribed from COMPACT's catalogue.

Model

YDC3310 S/H

Capacity (kVA / kW)
10 / 9
Battery voltage
192 / 240 V
Dimensions H×W×D (mm)
828 × 250 × 868
Net weight
< 70 kg
Model

YDC3315 S/H

Capacity (kVA / kW)
15 / 13.5
Battery voltage
192 / 240 V
Dimensions H×W×D (mm)
828 × 250 × 868
Net weight
< 70 kg
Model

YDC3320 S/H

Capacity (kVA / kW)
20 / 18
Battery voltage
192 / 240 V
Dimensions H×W×D (mm)
828 × 250 × 868
Net weight
< 70 kg
Model

YDC3330 S/H

Capacity (kVA / kW)
30 / 27
Battery voltage
192 / 240 V
Dimensions H×W×D (mm)
828 × 250 × 868
Net weight
< 70 kg
Model

YDC3340 S/H

Capacity (kVA / kW)
40 / 36
Battery voltage
384 / 408 / 432 / 456 V
Dimensions H×W×D (mm)
828 × 250 × 868
Net weight
< 70 kg
Model

YDC3360 S/H

Capacity (kVA / kW)
60 / 54
Battery voltage
384 / 408 / 432 / 456 V
Dimensions H×W×D (mm)
828 × 360 × 868
Net weight
< 120 kg
Model

YDC3380 S/H

Capacity (kVA / kW)
80 / 72
Battery voltage
384 / 408 / 432 / 456 V
Dimensions H×W×D (mm)
828 × 360 × 868
Net weight
< 120 kg

Seven models, 10–80 kVA. The range steps 40 → 60 kVA — there is no 50 kVA rating. Battery voltage per the latest YD brochure: 192 / 240 V on 10–30 kVA, 384–456 V on 40–80 kVA (the legacy YD catalogue grouped 40 kVA with the lower-voltage class). Per-model cabinet dimensions/weights are indicative and confirmed by the sales team; whether the 40 kVA now uses the larger frame is a VERIFY item.

Specifications

Technical specification

Transcribed from COMPACT's product catalogue.

Input

Nominal voltage
380 / 400 / 415 VAC (3Ph + N + PE)
Operating voltage range
208–478 Vac
Operating frequency range
45–55 Hz @ 50 Hz / 54–66 Hz @ 60 Hz (auto-sensing); 40–70 Hz on 60/80 kVA
Power factor
≥ 0.99
Input THDi
≤ 3% (non-linear load)

Bypass

Voltage range
380 VAC +25% max (opt +10/15/20%); 400 VAC +20% (opt +10/15%); 415 VAC +15% (opt +10%); min −45% (opt −20/−30%)
Frequency range
Synchronised tracking range ± 10%

Output

Voltage
380 / 400 / 415 VAC (3Ph + N + PE)
Power factor
0.8 / 0.9
Voltage regulation
± 1%
Frequency — line mode
± 1% / ± 2% / ± 4% / ± 5% / ± 10% of rated (selectable)
Frequency — battery mode
50 / 60 Hz ± 0.1
Crest factor
3:1 (max)
THDi
≤ 2% linear load / ≤ 5% non-linear load
Efficiency
≤ 94.5%

Battery & system

Battery voltage
192 / 240 V (10–30 kVA); 384 / 408 / 432 / 456 V (40–80 kVA)
Charge current
Max 10 A (10–30 kVA); max 30 A (40–80 kVA)
Transfer time
Mains ↔ battery 0 ms; mains ↔ bypass 0 ms
Overload
≤ 110% 60 min · ≤ 125% last 10 min · ≤ 150% last 1 min · > 150% → bypass
Communication
USB, parallel port, dry contact, intelligent slot; SNMP card & relay card optional

Environment & standards

Operating / storage temperature
0–40 °C / -25 to 55 °C
Humidity
0–95% non-condensing
Noise level
< 58 dB
Dimensions (H×W×D)
828 × 250 × 868 mm (10–40 kVA) / 828 × 360 × 868 mm (60–80 kVA)
Net weight
< 70 kg (10–40 kVA) / < 120 kg (60–80 kVA)
Safety
IEC / EN 62040-1, IEC / EN 60950-1
EMC
IEC / EN 62040-2, IEC 61000-4-2/-3/-4/-5/-6/-8
Related

Consider alongside

COMPACT Enterprise Classic three-phase online UPS cabinets in a light finish, three-quarter view20–300 kVA

Enterprise Classic

Three-phase online double-conversion UPS, transformer-based with output galvanic isolation — 20–300 kVA.

Transformer-based true on-line double conversion
COMPACT Precision Power Conditioner cabinet with digital voltage display and rotary isolator, three-quarter viewUp to 300 kVA

Precision Power Conditioner (PPC)

Solid-state precision voltage conditioning — no moving parts, correction in under 20 milliseconds.

DSP-controlled IGBT PWM buck-boost — solid state, no moving parts
Amaron Quanta 12 V 26 Ah sealed maintenance-free VRLA battery

Batteries

SMF, tubular and lithium-ion battery banks, sized and maintained to your backup requirement.

Spec on request

Talk to us to uncover the hidden problems

Tell us the load, the site and the supply. COMPACT's pre-sales team will confirm whether YD Series is the right fit — and flag anything else the site needs that a spec sheet alone would miss.

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