NCTS NU1K2S 1KVA 900W Online Tower UPS – Pure Sine Wave Uninterruptible Power Supply

The NCTS NU1K2S 1KVA 900W Online Tower UPS is designed to provide reliable backup power and continuous electrical protection for computers, servers, networking equipment, and other sensitive electronic devices. With a 1000VA capacity and 900W rated output, this online uninterruptible power supply delivers a pure sine wave output to help maintain stable power during electrical interruptions, voltage fluctuations, and unstable power conditions. Its single-phase input and output configuration makes it suitable for office environments, IT systems, and professional applications where dependable power is required.

Equipped with two internal 12V 7Ah batteries, the NCTS NU1K2S UPS provides a standard backup time of at least 10 minutes at half load and 5 minutes at full load. A zero-millisecond transfer time between AC and battery operation is supported to help prevent interruptions to connected equipment. A wide input voltage range of 115–300VAC ±5V is accommodated, while a regulated 220VAC ±1% inverter output is maintained. RS232 communication and expandable monitoring options are also provided for convenient power management and system monitoring.

Key Features

- 1KVA / 900W Power Capacity: A rated output capacity of 1000VA and 900W is provided to support computers, networking equipment, and other compatible electronic devices.

- Online UPS Technology: Continuous power protection is provided through an online UPS design, helping connected equipment remain operational during power disturbances.

- Pure Sine Wave Output: A clean sine wave output is delivered with total harmonic distortion below 3% for linear loads and below 8% for nonlinear loads, supporting stable operation of sensitive electronics.

- Zero Transfer Time: A 0ms transfer time between AC and battery operation is supported, allowing uninterrupted power delivery when the main electrical supply is disrupted.

- Built-In Battery Backup: Two internal 12V 7Ah batteries are included, providing at least 10 minutes of backup at half load and at least 5 minutes at full load under standard conditions.

- Wide Input Voltage Range: An input voltage range of 115–300VAC ±5V is supported to accommodate variations in the electrical supply.

- Stable Output Voltage: A regulated inverter output of 220VAC ±1% is provided to help protect connected devices against voltage instability.

- Fast Battery Recharging: The internal battery system can be recharged to 90% capacity in approximately 5 hours under standard conditions.

- Overload Protection: A load of 130% can be sustained for at least 30 seconds, with a recovery point of 90% load.

- Advanced Communication and Monitoring: RS232 communication is supported, with expansion options for RS485, dry contact, SNMP, SMS, and additional monitoring methods through a smart slot.

- Tower UPS Design: A standalone tower configuration is provided for installation in offices, workstations, and IT environments.

Specifications

General

• Brand: NCTS

• Model: NU1K2S

• Product Type: Online Uninterruptible Power Supply (UPS)

• Design: Tower

• UPS Technology: Online Pure Sine Wave

• Rated Output Capacity: 1KVA / 900W

• Input and Output Configuration: Single-Phase Input and Output

• GTIN: 6295151551097

Input Specifications

• Rated Voltage: 220VAC

• Input Voltage Range: 115–300VAC ±5V

• Input Frequency Range: (45–55) ±0.5Hz

• Bypass Voltage Range: 80VAC × (1 ±5%) to 285VAC × (1 ±5%)

• Maximum Input Current When Powered On: Less than 150% of Rated Current

Battery Specifications

• Battery Group Voltage: 24V

• Battery Configuration: Internal

• Battery Capacity: 7Ah × 2 Pieces

• Battery Voltage: 12V per Battery

• Backup Time at Half Load: ≥10 Minutes (Standard)

• Backup Time at Full Load: ≥5 Minutes (Standard)

• Battery Charging Time: Approximately 5 Hours to Reach 90% Capacity (Standard)

• Charging Time for Long-Running Configurations: Depends on External Battery Group Capacity

Output Specifications

• Output Voltage: 220VAC ±1% (Inverter Output)

• Output Frequency with Normal AC Input: 50 ±5Hz

• Output Frequency with Abnormal AC Input: 50Hz ±1%

• Output Waveform: Pure Sine Wave

• Total Harmonic Distortion (Linear Load): Less than 3%

• Total Harmonic Distortion (Nonlinear Load): Less than 8%

• Output Power Factor: 0.9

• Overload Capability: 130% Load for at Least 30 Seconds

• Overload Recovery Point: 90% Load

• Output Current Peak Coefficient: 3:1

• Transfer Time Between AC and Battery: 0ms

Communication and Monitoring

• Communication Interface: RS232

• RS232 Expansion: RS485 and Dry Contact

• Smart Slot: Supported

• Optional Monitoring Expansion: SNMP, SMS, and Other Monitoring Methods

Physical Specifications

• Net Weight: 8.5 kg

• Gross Weight: 9 kg

• Unit Dimensions (W × H × D): 442 × 227 × 330 mm

• Carton Dimensions (W × H × D): 475 × 455 × 345 mm

Conclusion

The NCTS NU1K2S 1KVA 900W Online Tower UPS is designed to deliver dependable backup power and stable electrical protection for essential electronic equipment. With pure sine wave output, zero transfer time, internal battery backup, overload protection, and expandable monitoring capabilities, reliable power continuity is supported for offices, IT infrastructure, networking systems, and professional workstations.