Eaton Bypass Isolation Contactor Based Transfer Switch

Description

Eaton Bypass Isolation Contactor transfer switch is used in life safety and other mission-critical applications where redundancy is desired and maintenance of the automatic transfer switch can be performed without interrupting power to the load. Transfer switches can be equipped with the ATC- 300+ or ATC-900 controller.

Eaton Bypass Isolation Contactor Configuration

100, 150, 200, 225, 260, 400, 600, 800, 1000, 1200 and 1600 A
Two-, three- or four-pole (the fourth pole is fully rated)
Up to 600 Vac, 50/60 Hz
NEMA 1, 3R, 12, 4X

Design Highlights

Front access is a standard feature on all ratings
Entry:
- Top, bottom or both
- Isolated compartments
Improved safety:
- Isolated compartments with barriers
- Single motion rack-out with doors closed
- Ability to test power switching elements during drawn out process
Dual ATS capability—both the ATS switch and bypass switch operate in automatic mode
Installation flexibility:
- Field entry/exit locations can be modified in the field
- Interchangeable draw out contactors
Field-selectable multi-tap transformer panel permits operation on a wide range of system voltages
Dual draw out—ATS and bypass

Eaton Bypass Isolation Contactor Features, Benefits, and Functions

Standard Features

Drawout cassette design on both ATS and bypass
No service interruption in bypass to the same source
Source available contacts:
- Source 1 present

Field-programmable time delays:
- Time delay engine start: 0–1200 seconds
- Time delay normal to an emergency.

Optional Features

Surge protection(UL 1449 3rd Edition)
Eaton IQ and Power Xpert multi-function power quality metering
Automatic transfer mode 2NO and 2NC 0–1800 seconds
Source 2 present 2NO and 2NC
Switch position contacts:
- Source 1 position 1NO and 1NC
- Source 2 position 1NO and 1NC
Source 1 and Source 2 senses:
- Undervoltage/ under frequency
- Overvoltage/ over frequency
- Three-phase rotation protection (ATC-300+ only)
Three-phase voltage unbalance/loss (ATC-300+ only)
Pretransfer signal contacts 1NO and 1NC (open transition only)
Go to Source 2 (EMERGENCY)
Time delay emergency to normal: 0–1800 seconds
Time delay engine cooldown: 0–1800 seconds
Time delay emergency failure: 0–6 seconds
LCD-based display for programming, system diagnostics and Help menu display
Mimic diagram with source available and connected LED indication
Time-stamped history log
System TEST pushbutton
Programmable plant exerciser—OFF, daily, 7-, 14-, 28-day interval selectable run time 0–600 minutes no-load/ load with fail-safe automatic/automatic retransfer mode
Modbus RTU via RS-485
Remote annunciation with control
Open in-phase transition, time delay neutral or in- phase with a default to time delay neutral transfer
ATC-900 controller
- Includes Modbus RTU via RS-485
- Includes four programmable inputs/ outputs
- Includes two plant exercisers
- Includes LCD color display with easy navigation tools to settings and event logs
- Expandable I/O (up to 20 I/O total)
- Optional integrated load metering
- Optional Ethernet TCP/ IP communications