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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

ZTM

ZTM online three phase to single phase transformer-less UPS

The ZTM UPS series, available in 10 and 20 kVA power ratings, is an Online Double Conversion uninterruptible power supply designed to protect sensitive industrial equipment, computer networks, security systems, laboratory equipment and professional applications. With three-phase or single-phase input and single-phase output configuration, ZTM provides high installation flexibility. Its unity output power factor (kW = kVA) allows full utilization of the UPS rated capacity and increases available power for modern and critical loads. The wide input voltage range reduces unnecessary battery operation and helps extend battery service life. The intelligent battery charging system continuously monitors battery conditions and optimizes the charging process. Variable battery configuration allows continued operation even in the event of partial battery failure. ZTM supports parallel operation of up to four UPS units and can be used for capacity expansion or system redundancy. The color touch-screen LCD display provides real-time information including input and output status, load level, battery capacity and system alarms. USB, RS232, RS485, dual communication slots, EPO, EMBS, Dry Contact and maintenance bypass make this UPS a comprehensive solution for medium-power critical infrastructures.

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Topology
Online Double Conversion
Power Range
10 - 20 kVA
Input / Output
3P : 1P (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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4.3 ★
  • Performance
  • Reliability
  • Features
  • Build Quality
  • Value for Money
(AI Generated)
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Purchase Steps

Step 1: Needs Assessment and Solution Proposal

Our technical experts begin by understanding the customer’s specific power requirements, operating environment, and long-term goals. Based on this assessment, we recommend the most suitable products and system configurations tailored to the client’s needs.

Step 2: Purchase Request and Quotation Preparation

Once the customer expresses interest in a particular solution, we formally receive their purchase request. In response, we prepare a detailed price quotation covering the proposed products and services.

Step 3: Proforma Invoice Issuance

Following the quotation phase, a proforma invoice is issued for the selected items. This document outlines all financial and logistical details necessary for the customer to proceed with the purchase.

Step 4: Confirmation and Payment Agreement

Upon the customer’s approval of the proforma invoice, both parties finalize the payment terms, including method, schedule, and any applicable conditions. This step confirms mutual agreement and initiates the order process.

Step 5: Procurement and Final Invoice

After confirming the order, our team begins the procurement process for the approved items. Once ready, we issue the final invoice to the customer based on the agreed terms and confirmed specifications.

Step 6: Delivery, Warranty, and Handover

The final step includes preparing the goods for delivery, issuing official warranty documentation, and ensuring all contractual obligations are met. The products are then handed over to the customer in accordance with the agreed timeline and conditions.

Purchase Steps

Step 1: Needs Assessment and Solution Proposal

Our technical experts begin by understanding the customer’s specific power requirements, operating environment, and long-term goals. Based on this assessment, we recommend the most suitable products and system configurations tailored to the client’s needs.

Step 2: Purchase Request and Quotation Preparation

Once the customer expresses interest in a particular solution, we formally receive their purchase request. In response, we prepare a detailed price quotation covering the proposed products and services.

Step 3: Proforma Invoice Issuance

Following the quotation phase, a proforma invoice is issued for the selected items. This document outlines all financial and logistical details necessary for the customer to proceed with the purchase.

Step 4: Confirmation and Payment Agreement

Upon the customer’s approval of the proforma invoice, both parties finalize the payment terms, including method, schedule, and any applicable conditions. This step confirms mutual agreement and initiates the order process.

Step 5: Procurement and Final Invoice

After confirming the order, our team begins the procurement process for the approved items. Once ready, we issue the final invoice to the customer based on the agreed terms and confirmed specifications.

Step 6: Delivery, Warranty, and Handover

The final step includes preparing the goods for delivery, issuing official warranty documentation, and ensuring all contractual obligations are met. The products are then handed over to the customer in accordance with the agreed timeline and conditions.

Product Originality


At Zener Eng. Co., we understand that today’s smart buyers seek original, high-quality products those manufactured by reputable, well-established companies that invest in research, development, and quality assurance. We fully respect this expectation and are committed to offering only genuine products, with full guarantees of authenticity and performance.
Driven by our core values of honesty and customer-centric service, we go to great lengths to ensure that every product we offer is authentic, officially sourced, and backed by valid warranties. All items are verified with original manufacturer serial numbers, untampered, and legally imported into the country.
The equipment and devices we supply are fully covered under warranty. In the event of any issue during the warranty period, our customers benefit from full after-sales support and technical service provided by Zener Engineering Company.
Customer satisfaction is a fundamental organizational goal for us. We constantly measure our success in this area through feedback and experiences shared by our valued clients.
Unfortunately, it is not uncommon for buyers to encounter sellers who promise originality and official warranties, only to discover when problems arise that the product was not genuine or the warranty was invalid. This leads to frustration and a lack of trust in the purchasing process.
At Zener, one of our key missions is to eliminate such concerns by creating a sense of trust and peace of mind for our customers. We want you to feel confident in every purchase you make with us. To that end, we are always ready to provide official documentation verifying the authenticity and origin of any product upon request.

Product Originality


At Zener Eng. Co., we understand that today’s smart buyers seek original, high-quality products those manufactured by reputable, well-established companies that invest in research, development, and quality assurance. We fully respect this expectation and are committed to offering only genuine products, with full guarantees of authenticity and performance.
Driven by our core values of honesty and customer-centric service, we go to great lengths to ensure that every product we offer is authentic, officially sourced, and backed by valid warranties. All items are verified with original manufacturer serial numbers, untampered, and legally imported into the country.
The equipment and devices we supply are fully covered under warranty. In the event of any issue during the warranty period, our customers benefit from full after-sales support and technical service provided by Zener Engineering Company.
Customer satisfaction is a fundamental organizational goal for us. We constantly measure our success in this area through feedback and experiences shared by our valued clients.
Unfortunately, it is not uncommon for buyers to encounter sellers who promise originality and official warranties, only to discover when problems arise that the product was not genuine or the warranty was invalid. This leads to frustration and a lack of trust in the purchasing process.
At Zener, one of our key missions is to eliminate such concerns by creating a sense of trust and peace of mind for our customers. We want you to feel confident in every purchase you make with us. To that end, we are always ready to provide official documentation verifying the authenticity and origin of any product upon request.

Warranty Terms

Warranty Terms

Warranty Terms

Warranty Terms

Support Services

Support Services

Support Services

Support Services

Power Estimation

Power Estimation

Power Estimation

Power Estimation

UPS/Model
Select Model
UPS/Input
Nominal Voltage
380/400/415 Vac (three phase + N + PE) or 220/230/240 Vac (single phase + N + PE)
Voltage Range
208 to 478 Vac (three phase) or 120 to 276 Vac (single 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
220/230/240 Vac (single 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
20 × 12 Vdc = 240 Vdc (standard) or 216 Vdc (output PF = 0.9) or 192 Vdc (output PF = 0.8)
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 ZTM?
The unity output power factor allows the entire rated capacity of the UPS to be used for real load power. This feature is especially important for modern and critical equipment that requires higher usable power.
What information is shown on the touch-screen LCD?
The color touch-screen LCD displays input and output status, load level, battery capacity, alarms and operating conditions, making system monitoring and management easier.
ZTM UPS
pdf | Jun. 31 2026 | brochure | FA
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