Cat® transfer switches are designed for a variety of standby power applications. They provide flexibility, reliability and value in a compact package. A Bypass Isolation Automatic Transfer Switch (ATS) provides fully functioning transfer in applications where emergency power to critical loads must be maintained at all times with no interruption. This type of design allows for inspection, maintenance or replacement of the power switching mechanisms with no interruption in electrical service. Contactor -based Bypass Isolation ATS are available from 100A to 1200A.
Features
-
Product Features
- ATC-300+ or ATC-800 microprocessor-based controller
- True RMS voltage and frequency sensing
- Maintains fully automatic capability while in bypass mode (optional)
- Single motion rack-out with the door closed
- Multiple field programmable time delays
- Switch position indication
- Source availability indication
- Source 1 and 2 auxiliary contacts
- Programmable plant exerciser
- System test pushbutton
- Load shed from emergency
- Mimic diagram
- Ability to test power switching isolated components
Specifications
Units for specifications
Technical Summary
| Rating Range | 100 to 3000A |
|---|---|
| Transfer Type | Bypass Isolation |
| Switch Type | Contactor Based |
Ratings
| Control Power | 100-1200A 2-, 3-, 4-pole |
|---|---|
| System Voltage Application | 120 - 600 Vac, 50/60 Hz |
| Withstand | Up to 65 kAIC withstand |
| Applicable Testing |
CSA C22.2 No. 178 certified IBC 2006, CBC 2007 and OSHPD |
Standard Equipment
Controls and Wiring
- All controls relays and industrial grade relays are totally encapsulated to minimize exposure to dust and dirt. Lugs are 90º rated and all control wire is #16 AWG, type XLPE with a 125º temperature rating.
Enclosure
- Durable powder-coated steel NEMA 1, 3R or 12 enclosures with three door hinges to ensure proper support of the door and door mounted devices. The hinges have removable hinge pins to facilitate door removal for easy wall mounting or service and are supplied with pad-lockable latches.
Optional Equipment
Available Options
- Space heaters
- 2- or 4-position test switch
- Multi-meter options available
- Open, closed or delayed transition
- Drawout capabilities on both ATS bypass portions and power switching devices completely interchangeable between ATS and bypass units
- Load sequencing contacts
- Dual drawout type is field configurable for top or bottom conduit entry
- Field selectable, multi ratio, control voltage transformer 50/60 Hz
- Seismic Zone 4 Qualified (BOCA, CBC, IBC, UBC and OSHPD)
- Remote communications
- Surge suppression
- Selectable automatic or non-automatic operation
Optional Delayed Transition includes:
- Time delay neutral
- Pre-transfer signal with 1 N.O. and 1 N.C. contacts