EH Series 10/15/20 kVA

Ultron EH Series, Three Phase UPS, 10kVA to 20kVA

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Power Reliability with the Best Total Cost of Ownership

The Delta Ultron EH series is a true online, double-conversion UPS. It is a proven power solution for IT rooms, telecommunications, banking, medical facilities, laboratories, and other settings in which mission critical applications cannot be disrupted.

True online double-conversion UPS technology isolates the output power and protects it from input anomalies. The dual input design of the Ultron EH series provides enhanced availability by accommodating different power supply sources. By accepting a wide input voltage range, EH series UPS units reduce probability of battery discharge to prolong battery life. Even if the UPS is under maintenance, a continuous supply of power to the load can be maintained by the use of the built-in manual bypass.

When paired with the EH series’ multi-connectivity interface, Delta’s advanced management software supports analysis, remote UPS management and monitoring, remote shutdown event log tracking, and event alert management. System stability is further enhanced by the unit’s simplified control circuit, and rapid computational capability is facilitated by the use of DPS-based technology.

For a modest initial investment, the double-conversion UPS series – EH provides both outstanding quality and one of the lowest costs of ownership for UPS systems within the 10-20 kVA range. To shrink the cost of operation even more, the units can be run in ECO mode for efficiency of up to 96%.

The Delta Ultron EH Series was honored by India’s NCN magazine in May 2014 with an award for innovation and energy efficiency. Matching reliability and ease of use with cutting-edge technology, the EH Series has earned its reputation as a top performer in the protection of mission critical applications.




Assured Reliability

  • True online double-conversion technology to completely isolate the output power from all input anomalies.
  • DSP based technology to support rapid computation capability and a simplified control circuit for enhanced stability.
  • Dual input design to allow different power supply sources for enhanced availability.
  • Built-in manual bypass to ensure continuous power to the load even if the UPS fails.

Best Total Cost of Ownership

  • A wide input voltage range to reduce battery discharge probability and prolong battery life.
  • ECO mode efficiency up to 96% to reduce operating cost.
  • Small footprint to save space.

High Flexibility

  • Parallel expansion and N+X redundancy up to 4 units without requiring additional hardware.
  • Additional charger and external charger box for flexible capacity expansion.
  • Remote and local emergency power-off functions (EPO) to promptly manage the UPS when emergencies occur.

Easy Manageability

  • Multi-connectivity interface to support remote UPS monitoring and management.
  • Advanced management software to provide event alert management, remote shutdown event log tracking and analysis.
  • Reliable battery management for better battery protection.

Technical Specifications

Model EH-10K / EH-15K / EH-20K
Power Rating [10k]: 10kVA / 8kW

[15k]: 15kVA / 12kW

[20k]: 20kVA / 16kW
Nominal Voltage 220/380 Vac, 230/400 Vac, 240/415 Vac
Voltage Range 208~304 Vac ( 50%~100% load) / 305~477 Vac (100% load)
Power Factor > 0.95 (full load)
Frequency 50 / 60 Hz
Voltage 220/230/240 Vac
Voltage Harmonic Distortion < 3% (linear load)
Voltage Regulation ± 2 %
Frequency 50/60 Hz ± 0.1Hz
Overload Capacity ≤105 %: continuous

≤106%~110%: 10 minutes

≤111%~125%: 5 minutes

≤126%~150%: 30 seconds

Battery Voltage 240 Vdc
Charge Current Built-in: 4A

Additional charger board (optional): 4A

Charge Voltage Float charge 272 ± 2 Vdc

Boost charge 280 Vdc

Communication Interfaces SMART Slot x 1, MINI Slot x 1, Parallel Port x 2, RS232 Port x 1,

REPO Port x 1m Charger Detection Port x 1

Safety & EMC CE, IEC62040-1, IEC62040-2
Other Features
Emergency Power Off Local and remote
Maintenance Bypass Switch Built-in
Online Mode 91%
ECO Mode 96%
Operating Temperature 0 ~ 40ºC
Relative Humidity 5% ~ 95 % (non-condensing)
Audible Noise [10k]: < 55 dBA

[15k / 20k]: < 60 dBA
Dimensions (W x D x H) [10k]: 200 x 490 x 490 mm

[15k / 20k]: 250 x 610 x 650 mm
Weight [10k]: 26 Kg

[15k / 20k]: 45 Kg



EH Series 10/15/20 kVA UPS (Leaflet) – for all available regions

EH Series 10/15/20 kVA UPS (User Manual)