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  • Free transportation to the installation site
  • Free initial installation and setup
  • 2-year official warranty and 10 years of after-sales service
ZM RT online single phase to single phase transformer-less UPS

The ZM RT UPS, with a power range of 1 to 10 kVA, is a high-frequency single-phase online double-conversion (VFI-SS-111) uninterruptible power supply system designed to protect sensitive loads such as computers and office equipment. This model offers excellent power quality with an output power factor of 1, input/output voltage of 200 to 240 VAC, and a frequency of 50/60 Hz (with auto-sensing). The ZM RT’s unique design with a rotatable display allows for both tower and rack-mount installation, compatible with standard rack equipment. Thanks to its modern inverter design equipped with an advanced Digital Signal Processor (DSP), connected loads receive a pure sine wave output with stabilized voltage and frequency without any interruption. Available in 1 to 3 kVA in two series: the S series with internal batteries (2 to 6 units of 9 Ah batteries, providing 6 to 8 minutes of backup at full load) and the H series for external batteries (long-run). The ZM RT achieves 90% battery charge in 4 hours. Its wide input voltage range ensures proper operation under unstable conditions. The LCD display clearly shows the device’s parameters and operating status. The rear panel includes standard IEC outputs, RS232/USB ports (optional), a slot for communication equipment such as an SNMP module, and an Emergency Power Off (EPO) terminal. Comprehensive protections, including overload, overcurrent, overvoltage, overtemperature, deep discharge, and noise filters, ensure device safety. With an audible noise level below 55 dBA, it provides a quiet operating environment. Installation and setup are straightforward, allowing end-users to configure the UPS using the included user manual.

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Topology
Online double-conversion
Power Range
1 - 10 kVA
Input/Output
1P : 1P (in:out)
Output Power Factor
P.F. = 1
Features:

Wide input voltage acceptance range

Flexible installation as tower or rack-mount

Easy installation and setup (Plug & Play)

Equipped with LCD display

Parallel scalability up to 4 units (6 and 10 kVA)

Slot for communication equipment

Whats in the packing:
user manual iconUser Manual
rs232 serial cableRS232 Serial Cable
rackmount bracketRackmount or Tower Installation Bracket

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UPS/Model
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UPS/Input
Nominal Voltage
200, 208, 220, 230, 240 VAC single-phase + N
Voltage Range
110 to 300 VAC @ 50% load, 176 to 300 VAC @ 100% load
Frequency Range
40 to 70 Hz
Power Factor
0.99 @ full load
Voltage Distortion (THDi)
< 3%
Inlet Type
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UPS/Bypass
Voltage Range
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Frequency Range
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UPS/Output
Power
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Nominal Voltage
200, 208, 220, 230, 240 VAC single-phase + N
Voltage Variation
static variation ±1%, dynamic variation ±5%
Frequency Range
50 or 60 Hz ±0.1 Hz (battery mode)
Power Factor
1
Voltage Distortion (THDv)
< 1% with resistive linear load, < 3% with non-linear load
Outlet Type
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Wave form
pure sinewave
Efficiency
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UPS/Battery
Battery Type
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Qty × Voltage
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Recharging Time
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UPS/Protections
Overload
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Protections
over-current, short-circuit, over-voltage, under-voltage, over-temperature, excessive low battery
Alarms
line failure, battery low, over-load, fault conditions
UPS/Physical
Dimensions (W × D × H)
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Weight
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UPS/Environment
Working Temperature
ambient: min 0 °C, max 40 °C, recommended for battery life: 20 to 25 °C
Working Humidity
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Altitude Level
1000 m @ nominal power (Derating 1% power for every 100 m above 1000 m, max 6000 m)
Noise Level
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UPS/Others
Communications
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Standards
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What is the efficiency of the ZM RT UPS in online mode?
The efficiency in online mode is 95.5% (at 10 kVA) and 95% (at 6 kVA), which reduces energy loss and heat generation. This high efficiency helps lower electricity and cooling costs, especially in environments operating 24/7. It also makes the ZM RT ideal for facilities seeking sustainability and energy savings without compromising performance.
Is the ZM RT suitable for non-linear or IT loads?
Yes, the ZM RT is specifically designed to handle non-linear loads common in IT and industrial systems. It maintains voltage stability and waveform integrity even with variable loads or high harmonics (less than 5%), making it ideal for protecting sensitive equipment and servers.
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