Description
TERASAKI ELECTRIC CO., LTD.
TEMPOWER 2
AR212S
3-POLE AIR CIRCUIT BREAKER
1H1407SBA
POLES: 3
FREQ.: 50/60HZ
UI: 1000V
UIMP: 12KV
MAX.: 1250A
CAT: B
AMB. TEMP.: 45°C
TYPE: AGR-21S-PRU
OVER-CURRENT RELEASE
MADE IN JAPAN
The Terasaki Tempower 2 AR212S is a 3-pole air circuit breaker rated at 1250A, designed for high-capacity electrical protection and distribution in marine power systems. As a core component within shipboard main switchboards, generator panels, and bus-tie arrangements, this air circuit breaker provides reliable over-current protection to safeguard critical electrical circuits. Its robust construction and proven performance make it an essential element of onboard power management, ensuring continuity of supply and protection against fault conditions in demanding marine environments.
Key Features
✓ Rated at 1250A maximum with a UI of 1000V and UIMP of 12kV, providing high-capacity overcurrent protection for main and distribution circuits.
✓ Equipped with AGR-21S-PRU over-current release, enabling accurate and responsive protection against overload and short-circuit conditions.
✓ Compatible with 50/60Hz power systems, making it suitable for vessels operating across international routes with varying shore or generator supply frequencies.
✓ Rated for ambient temperatures up to 45°C, reflecting suitability for engine room and machinery space switchboard installations typical in marine applications.
✓ Manufactured in Japan by Terasaki Electric Co., Ltd. to established quality standards, supporting direct replacement and maintenance planning for existing Tempower 2 installations.
Marine Applications
✓ Main switchboard and generator circuit breaker panels on merchant vessels, tankers, and bulk carriers requiring high-amperage electrical protection.
✓ Bus-tie and feeder circuit protection within integrated power management systems on offshore support vessels and platform supply vessels.
✓ Electrical distribution systems aboard passenger ferries and ro-ro vessels where reliable fault isolation is operationally critical.
✓ Auxiliary machinery power circuits on naval auxiliaries, dredgers, and heavy lift vessels with high-load electrical demands.
✓ Replacement and refit applications on vessels with existing Terasaki Tempower 2 switchgear, ensuring compatibility and minimising downtime during planned maintenance.
Why Marine Engineers Choose
Marine engineers specify the Terasaki Tempower 2 AR212S for its proven reliability in high-load shipboard environments, its clear technical ratings suited to demanding electrical protection duties, and the confidence that comes with Terasaki’s established reputation in marine switchgear.
Ideal For
Merchant vessels, tankers, bulk carriers, offshore support vessels, passenger ferries, ro-ro ships, and any commercial or industrial vessel operating Terasaki Tempower 2 switchboard configurations requiring 1250A air circuit breaker protection.
Technical Support
Technical support is available for this air circuit breaker and associated Terasaki Tempower 2 switchgear systems. Assistance covers onboard installation guidance, maintenance, and remote troubleshooting to help engineering teams resolve issues efficiently. Contact our technical team directly for further support.
