Eaton IZM91N4-U12F compact low voltage air power circuit breaker. Performance in a compact package, the IZM91 delivers powerful protection up to 1600A. With a volume of just 24dm3 and a front surface just slightly larger than an A4 size sheet of paper, the IZM91 is the smallest air circuit-breaker in the world.

Features
● Compact globally certified low voltage air power circuit breaker (ACB).
● Rated 630 - 1600 amperes (IEC 60947-2/GB) with an interrupting capacity of 65 kA and short time withstand of 42 kA at the 400 Vac level.
● Provides all the capabilities of a power circuit breaker in the compact size of a molded case breaker, half the size of a typical ACB.
● One frame size, regardless of ampere rating, reduces drawing conversion, structure integration time and parts inventory.
● The Most Advanced Technology. - Rogowski coil - does not saturate like iron core sensors, and one sensor accommodates 200 - 1600 ampere range. You never have to change a sensor and CTs are not required.
- Tension clamp secondary terminals - 10A continuous rating at 600V, mounted directly to fixed breaker or drawout cassette, they reduce wiring throughout enclosure and provide clean, organized wiring schemes.
- Breaker-mounted communication modules for Ethernet, INCOM™, Modbus® and PROFIBUS mount directly to the cassette, reducing the space and room required in gear for communication capability.
- “Direct Drive” mechanism - symmetrically loaded forces of the two-staged stored energy mechanism improves robustness, reliability, and achieves improved breaker life ratings.
- Fold-up cassette - with this simple design, all items in a cassette are replaceable without removing the cassette from the cell.
- Breaker-mounted racking or levering-in device - racking device is mounted on the breaker, decreasing the width of the cassette.
- Plug-N-Play accessories - no special tools needed. Accessory comes with plug and wires ready to install.

Application
● System protection
● Motor protection
● Transformer protection
● Generator protection
By selecting different types of control units, the switch requirements in these occasions can be fully met.

Key to type reference of air circuit breaker IZM9
Fixed:
Standard IZM91 basic device includes: fixed circuit breaker basic device, auxiliary contact (2a2b), door escutcheon
Standard IZM93, 97,99 basic device includes: fixed circuit breaker basic device, terminals, auxiliary contact (2a2b), door escutcheon

Withdrawable:
Standard IZM91 basic device includes: withdrawable circuit breaker basic device, auxiliary contact (2a2b), door escutcheon
Standard IZM93,97,99 basic device includes: withdrawable circuit breaker basic device, terminals, auxiliary contact (2a2b), door escutcheon


Key to type reference of air circuit breaker IZM9
Fixed:
Standard: fixed circuit breaker basic device, shunt release (220V AC), closing release (220V AC), motor operator (220V AC),
auxiliary contact (4a4b), release signal auxiliary contact (2a2b), door escutcheon, terminals, power supply module (only for U and P type releases)

Withdrawable:
Standard: fixed circuit breaker basic device, shunt release (220V AC), closing release (220V AC), motor operator (220V AC),
auxiliary contact (4a4b), trip indication signal auxiliary contact OTS (2a2b), door escutcheon, terminals, power supply module (only for U and P type releases), shutter protection, arc chamber cover, cassette, handle