Uninterruptible Power Supply QOLTEC 53981 On line 2kVA, 2000 VA capacity

QOLTEC 53981 On line 2kVA is an on-line uninterruptible power supply with a rated capacity of 2000 VA designed to provide continuous, regulated power to critical equipment. The unit uses double-conversion topology to deliver stable, clean AC output regardless of input disturbances, protecting connected devices from power interruptions, voltage sags and spikes, and frequency variations. The UPS supports safe, controlled shutdown of systems during extended outages and maintains full voltage regulation for sensitive electronics and network infrastructure.

Advantages

The on-line double-conversion design provides consistent sine-wave output with near-zero transfer time, ensuring uninterrupted operation for servers, storage systems and communication equipment. Built-in voltage regulation and filtering reduce electrical noise and protect against harmonic distortion. The 2000 VA capacity balances power and footprint for small-to-medium equipment racks and standalone installations. The UPS is suitable for continuous operation and offers predictable performance under varying mains conditions.

Suitable for

• Rack or tower servers
• Network switches, routers and firewalls
• Storage arrays and NAS devices
• Industrial control systems and sensitive laboratory instruments
• VOIP systems and telecom equipment

Key specifications

• Topology: on-line double-conversion UPS
• Rated capacity: 2000 VA
• Output waveform: pure sine wave
• Input voltage range: wide input tolerance for unstable mains
• Output voltage regulation: continuous AVR (automatic voltage regulation)
• Frequency regulation: accepts frequency variations and provides stable output
• Form factor: suitable for rack-mount or tower placement (check model-specific mounting options)
• Interfaces: monitoring and control connectivity for orderly shutdown and status reporting

How to use

Install the UPS on a stable surface or in a compatible rack following the manufacturer’s mounting instructions. Connect critical equipment to the UPS output sockets and plug the UPS input into a properly grounded mains outlet. Configure monitoring and shutdown software where available to enable automatic, controlled power-off of connected systems. Periodically test the UPS by performing simulated power-fail tests to verify battery condition and proper transfer to battery operation.

Usage recommendations

Place the UPS in a ventilated, dust-free environment with ambient temperature within the recommended operating range. Maintain battery health by avoiding prolonged deep discharge and schedule professional battery replacement according to runtime needs and battery life specifications. Use the UPS monitoring features to log events and plan preventive maintenance to ensure continuous protection of critical equipment.