Renting an automatic transfer switch (ATS) from PTS Rentals means you get a dependable piece of equipment that seamlessly switches your load from primary power to backup power—like a generator—during an outage, and then back again when utility power is restored. Our ATS rentals are designed for quick integration into your power setup, reducing risk and downtime on construction sites, events, emergency applications or temporary installations. With full delivery, setup, and support available from PTS Rentals, you’ll get the right switch solution without large capital purchase, and we’ll handle all maintenance and logistics so you can focus on operations.
Transfer switches allow switching from a primary power source to a secondary or tertiary power source and are employed in some electrical power distribution systems. Most often transfer switches can be seen where emergency power generators are used to back up power from the utility source. The transfer switch allows safely switching from utility power to emergency generator power while maintaining isolation of each source from the other.
Transfer Switch Specifications
General Description
The automatic transfer switch shall be electrically operated and mechanically interlocked to provide a safe and reliable means of transferring loads between normal and emergency power sources. The device shall be rated for continuous duty and designed for operation under all environmental and electrical conditions typically encountered in commercial and industrial applications.
Standards and Certifications
- UL 1008 Listed – Transfer Switch Equipment
- CSA Certified (where applicable)
- Compliant with NEC, NEMA, and IEEE standards
- Meets or exceeds all applicable regulatory requirements for performance and safety
Ratings
- Voltage: 208 V, 240 V, 480 V, or 600 V (as specified)
- Frequency: 60 Hz
- Amperage: 100 A to 4000 A continuous duty
- Withstand and Closing Ratings (WCR): up to 100 kA depending on configuration
Construction
The transfer switch shall consist of a double-throw, mechanically interlocked contact mechanism with a microprocessor-based controller. All power contacts shall be silver alloy for maximum conductivity and arc resistance. The enclosure shall be fabricated from heavy-gauge steel, powder-coated for corrosion protection, and available in NEMA 1, 3R, 4, or 4X ratings as required.
Operating Mechanism
The mechanism shall provide a smooth, positive transfer under load without excessive noise or vibration. Mechanical interlocks shall prevent simultaneous connection of both power sources. The operating time shall be adjustable for in-phase transfer and programmed delays.
Control and Logic
- Microprocessor-based logic with LED indicators for source availability and switch position
- Adjustable time delays for engine start, transfer, retransfer, and cooldown
- Test and exercise functions for maintenance verification
- Programmable under/over-voltage and under/over-frequency sensing
- Selectable 2-position or 3-position manual transfer operation
Auxiliary Features
- Remote start/stop signal capability
- Contacts for source availability and load position indication
- Optional RS-485 or Modbus communication interface
- Event and fault logging with timestamp
Enclosure
- Type: NEMA 1 (indoor), NEMA 3R (outdoor), NEMA 4/4X (weatherproof/stainless steel)
- Finish: Durable powder-coated paint, color gray or as specified
- Door: Hinged with lockable handle and viewing window (optional)
Testing and Quality Assurance
Each transfer switch shall undergo factory testing for proper mechanical and electrical operation, insulation resistance, dielectric strength, and functional sequencing. Certification documentation shall accompany each unit upon delivery.
Installation and Maintenance
The switch shall be suitable for wall or floor mounting. All control and power wiring shall be front-accessible. Maintenance shall be minimal, requiring only periodic visual inspection and cleaning under normal conditions.
Optional Accessories
- Battery charger and monitoring system
- Space heaters with thermostat control
- Surge suppression and transient voltage protection
- Load test connection cabinet
- Bypass isolation switch (manual or automatic)
Manufacturer
The automatic transfer switch shall be manufactured by PTS Rentals or an approved equal, with a minimum of 10 years of documented experience in the design and production of power transfer equipment.
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