Description
TERASAKI ELECTRIC CO. LTD
TEMPOWER
AT06
AIR CIRCUIT BREAKER
POLES: 3
OPERATIONAL VOLTAGE: 690 VAC
RATED FREQUENCY: 50/60 HZ
RATED CURRENT: 630 A
STANDARD: JEC 947-2
UTILIZATION CAT: B
AMB TEMP: 45℃
MADE IN JAPAN
The Terasaki AT06 Tempower is a 3-pole air circuit breaker designed for high-capacity power distribution and overcurrent protection in marine electrical systems. Rated at 630A and 690VAC, this breaker is engineered to safeguard switchboards, main distribution panels, and motor feeder circuits against overload and short-circuit conditions. As a core component within shipboard power management infrastructure, it plays a critical role in maintaining electrical continuity and protecting downstream equipment during fault events.
Key Features
✓ Rated at 630A continuous current with an operational voltage of 690VAC and compatibility with both 50Hz and 60Hz supply frequencies, making it suitable for international vessel operations.
✓ Manufactured to JEC 947-2 standard and classified under Utilization Category B, indicating suitability for applications requiring selective discrimination in fault protection schemes.
✓ Rated for ambient temperatures up to 45℃, consistent with the elevated thermal environments typical of engine rooms and switchboard compartments aboard commercial and industrial vessels.
✓ 3-pole configuration supports three-phase power distribution systems commonly found in main switchboards, emergency switchboards, and motor control centres onboard ships.
✓ Manufactured in Japan by Terasaki Electric Co. Ltd, a recognised name in marine-grade electrical protection equipment, supporting reliable like-for-like replacement in existing Tempower panel installations.
Marine Applications
✓ Main and emergency switchboard feeder protection on cargo vessels, tankers, bulk carriers, and offshore support vessels.
✓ Motor feeder circuit protection for high-power drives including pumps, compressors, winches, and HVAC systems aboard commercial ships.
✓ Power distribution panels in engine rooms where robust overcurrent protection at 690VAC is required for three-phase load circuits.
✓ Retrofit and direct replacement within existing Terasaki Tempower switchgear assemblies to restore original protection characteristics without panel modification.
✓ Suitable for use on vessels operating under international trading conditions where dual-frequency electrical systems (50/60Hz) are a requirement.
Why Marine Engineers Choose
The Terasaki AT06 Tempower is a well-established air circuit breaker in the marine sector, valued for its precise fault discrimination, robust construction to JEC standards, and suitability for the demanding thermal and electrical conditions found aboard ocean-going vessels.
Ideal For
Cargo ships, bulk carriers, tankers, container vessels, offshore support vessels, ferries, and other commercial marine craft operating three-phase 690VAC distribution systems requiring reliable overcurrent & short-circuit protection.
Technical Support
Technical support is available for the Terasaki AT06 Tempower air circuit breaker, covering onboard installation guidance, functional testing, and remote troubleshooting assistance. Contact our team for help with integration into existing switchboard configurations or replacement planning.
