Uninterruptible Power Supply TED ® TED003959 Line-Interactive 700VA 400W with LCD Display

Uninterruptible Power Supply TED ® TED003959 Line-Interactive 700VA 400W with LCD Display delivers 700 VA / 400 W of backup power and monitoring in a compact form factor. The UPS uses a line‑interactive design with automatic voltage regulation (AVR) to stabilize input voltages and provide a seamless transition to battery during outages. An integrated LCD display shows operating status, input/output voltages, battery level and load percentage for straightforward on-site diagnostics. The unit is intended to protect desktop computers, network devices and peripherals from short interruptions, brownouts, surges and other mains disturbances.

Advantages

The line‑interactive topology with AVR reduces sensitivity to voltage sags and surges while extending battery life by minimizing unnecessary transfers to battery. The built‑in LCD display offers clear indication of input voltage, output status, battery runtime estimate and load, enabling quick assessment without additional tools. Compact size and standard outlet configuration make installation in small offices, home workstations or network closets simple and space-efficient.

Suitable for

• Home desktop PCs and home office workstations
• Small office servers, network switches and routers
• External storage devices, NAS units and backup drives
• Point-of-sale terminals and peripheral equipment

Key specifications

• Output power: 700 VA / 400 W
• Topology: line‑interactive with automatic voltage regulation (AVR)
• Display: integrated LCD for status, input/output voltage, battery and load indicators
• Battery supported runtime: short‑term backup for orderly shutdown and protection against brief outages
• Protection features: overvoltage, undervoltage and surge protection
• Form factor: compact desktop or rack shelf compatible
• Typical applications: single workstation or small network equipment protection

How to use

Place the UPS on a stable, well‑ventilated surface near the equipment to be protected and connect the UPS to a grounded mains outlet. Attach critical devices to the battery‑backed outlets and noncritical peripherals to surge‑only outlets if present. Power on the UPS and check the LCD to confirm input voltage, load and battery status. In the event of a mains failure the unit will switch to battery power automatically; monitor the displayed runtime and perform an orderly shutdown of connected systems before the battery is depleted.

Usage recommendations

For reliable operation, perform an initial battery charge cycle after installation and test the switch‑over periodically. Keep the UPS in a temperature‑controlled environment within manufacturer‑recommended limits, avoid placing it near heat sources, and ensure ventilation openings are not obstructed. Follow regular maintenance and battery replacement intervals to maintain backup availability.