Automatic Transfer Switch and Protector 100A – 3 and 4 Power Sources

Price range: $ 65.00 through $ 85.00

100A automatic transfer switch with built in protection for three or four 220V AC sources. Features Live and Neutral switching, manual source control and adjustable voltage, current, timing and temperature protection.

The Multi-Way Automatic Transfer Switch with built in Protection (100A) selects between three or four single-phase 220V AC power sources and supplies the connected load from the selected source. It supports automatic priority-based operation as well as independent manual control of each input source.

Choose the required model:

  • 3 Way : three power-source inputs
  • 4 Way : four power-source inputs

Key Features

  • Rated current up to 100A
  • Two-pole switching of Live and Neutral
  • Automatic source transfer with selectable priority
  • Manual ON/OFF control for each input source
  • Digital display of source voltages, load voltage and current
  • Adjustable overvoltage, undervoltage and overcurrent protection
  • Adjustable power-on, recovery and timer settings
  • Over-temperature protection and audible fault alarm
  • Voltage and current calibration
  • DIN-rail mounting
  • NC, COM and NO auxiliary terminals

Technical Specifications

  • Rated current: 100A
  • Rated supply: three or four 220V AC sources, depending on model
  • Operating voltage range: AC 80–300V
  • Frequency: 40–70Hz
  • Overvoltage setting range: 120–300V or OFF
  • Undervoltage setting range: 80–210V or OFF
  • Overcurrent setting range: 1–100A or OFF
  • Temperature protection range: 40–120°C
  • Power-on and recovery delay range: 1–999 seconds
  • Overcurrent action delay: 0.1–30 seconds
  • Measurement accuracy: Class 0.5
  • Rated insulation voltage: 450V
  • Protection class: IP20
  • Operating temperature: -5°C to +40°C
  • Installation altitude: below 2,000m
  • Approximate size: 210 × 117 × 72mm

Installation notice: Suitable upstream circuit protection is required for every source. Installation and wiring must be performed by a qualified electrician. Disconnect all power sources before installation or maintenance.

Number of Sources

3 Way, 4 Way

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