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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
ZT online three phase to three phase transformer-less UPS

The ZT UPS series, available in 20 and 40 kVA power ratings, is an Online Double Conversion uninterruptible power supply designed to protect industrial equipment, data centers, computer networks, security systems, laboratory equipment and other critical loads. Featuring three-phase input and three-phase output configuration, ZT is an ideal solution for industrial applications and mission-critical infrastructures. Its unity output power factor (kW = kVA) enables full utilization of the UPS rated capacity, providing more usable power for modern and sensitive loads. The wide input voltage range minimizes unnecessary battery operation and extends battery service life. The intelligent battery charging system continuously monitors battery conditions and optimizes the charging process. Variable battery configuration provides greater flexibility in system design and backup time expansion. ZT supports parallel operation of up to four UPS units without additional hardware, making it suitable for capacity expansion and redundancy applications. The color touch-screen LCD display provides comprehensive information about system status, load conditions, battery capacity and alarms. USB, RS232, RS485, dual communication slots, EPO, EMBS, Dry Contact and maintenance bypass make ZT a professional solution for critical infrastructures and data centers.

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Topology
Online Double Conversion
Power Range
20 - 40 kVA
Input / Output
3P : 3P (in:out)
Output Power Factor
P.F. = 1
Features:

Unity output power factor (kW = kVA)

Parallel capability for power scalability

Variable battery configuration

Color touch-screen LCD display

RS485 communication port

Dual communication slots

Whats in the packing:
user manual iconUser Manual
usb cableUSB Cable
rs232 serial cableRS232 Serial Cable

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UPS/Model
Select Model
UPS/Input
Nominal Voltage
380/400/415 Vac (three phase + N + PE)
Voltage Range
208 to 478 Vac @ 50% load (three phase); 305 to 478 Vac @ 100% load (three phase)
Frequency Range
rated: 50 or 60 Hz (automatic select), range: 40 to 70 Hz
Voltage Distortion (THDi)
≤ 3٪ (100% non-linear load)
Inlet Type
Terminal
UPS/Bypass
Voltage Range
176 to 264 Vac (can be set via lcd display)
Frequency Range
±10٪
UPS/Output
Power
- select a model from top -
Nominal Voltage
380/400/415 Vac (three phase + N + PE)
Voltage Variation
static variation ±1%
Frequency Range
50 or 60 Hz (tolerance ±0.1 Hz)
Power Factor
1
Voltage Distortion (THDv)
< 2% with resistive linear load, < 5% with non-linear load
Outlet Type
Terminal
Wave form
pure sinewave
Efficiency
up to 94.5%
UPS/Battery
Battery Type
only external battery connect via terminal
Qty × Voltage
- select a model from top -
UPS/Protections
Overload
AC mode: 100% < load ≤ 110% for 60 min then transfer to bypass, 110% < load ≤ 125% for 10 min then transfer to bypass, 125% < load ≤ 150% for 1 min then transfer to bypass, over 150% transfer to bypass immediately Battery mode: 100% < load ≤ 110% for 10 min, 110% < load ≤ 125% for 1 min, 125% < load ≤ 150% for 5 sec, over 150% shut down immediately
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)
250 × 580 × 655 mm
Weight
- select a model from top -
UPS/Environment
Working Temperature
ambient: min 0 °C, max 40 °C, recommended for battery life: 20 to 25 °C
Working Humidity
max 95% non-condensing
Noise Level
- select a model from top -
UPS/Others
Communications
USB type B, USB type A, RS232, RS485, 2 ‍× slot for communications interface, EPO, EMBS, dry contact, 2 × parallel port
Standards
Safety: IEC/EN 62040-1, IEC/EN 60950-1 EMC: IEC/EN 62040-2, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8
Other Specifications
zero (ac <-> batt), zero (inv <-> byp)

What is the advantage of unity output power factor in ZT?
The unity output power factor allows the entire rated capacity of the UPS to be utilized for real loads. This feature maximizes usable power and is particularly valuable for modern and critical applications.
What information is displayed on the touch-screen LCD?
The color touch-screen LCD displays information such as input and output status, load level, battery capacity, alarms and operating conditions, making system monitoring and management easier.
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