Description
TERASAKI ELECTRIC CO., LTD.
TEMPOWER 2
AR216H
3-POLE AIR CIRCUIT BREAKER
1H2545SAB
POLES: 3
FREQ.: 50/60HZ
UI: 1000V
UIMP: 12KV
MAX.: 1600A
CAT. B
AMB. TEMP.: 45°C
ANN1 ANN2: 40°C
TYPE: AGR-21BL-PS
OVER-CURRENT RELEASE
MADE IN JAPAN
The Terasaki Tempower 2 AR216H is a heavy-duty 3-pole air circuit breaker rated at 1600A, designed for high-capacity electrical protection and power distribution in marine and industrial environments. As an air circuit breaker, it provides reliable overcurrent and short-circuit protection within main and emergency switchboards, generator panels, and primary distribution systems onboard vessels. Rated at 1000V UI with an impulse withstand voltage of 12kV and compatible with both 50Hz and 60Hz supply frequencies, this unit is well suited to the demanding electrical environments found across a wide range of ship types. Its AGR-21BL-PS overcurrent release type ensures consistent trip response under fault conditions, making it a critical component in maintaining the integrity of onboard power systems.
Key Features
✓ 3-pole air circuit breaker with a maximum rating of 1600A and insulation voltage (UI) of 1000V, with an impulse withstand voltage (Uimp) of 12kV — as specified by Terasaki Electric.
✓ Compatible with 50/60Hz supply frequencies, making it suitable for vessels operating across international electrical standards and power grids.
✓ Fitted with an AGR-21BL-PS overcurrent release (Type: over-current release), providing automatic trip protection against overload and short-circuit faults in main distribution circuits.
✓ Rated for ambient temperatures up to 45°C (ANN1/ANN2 at 40°C), reflecting suitability for installation in engine room switchboards and machinery space panels where elevated temperatures are common.
✓ Manufactured in Japan by Terasaki Electric Co., Ltd. — a recognised supplier of marine-grade switchgear — and classified as Category B, subject to applicable panel and installation configuration requirements.
Marine Applications
✓ Main switchboard and distribution panel protection on commercial cargo vessels, bulk carriers, and container ships.
✓ Generator feeder and bus-tie protection within engine room electrical systems on tankers and offshore support vessels.
✓ Emergency switchboard installations where reliable high-amperage circuit protection is required under SOLAS-related power redundancy arrangements.
✓ Power management system integration on cruise ships, RoPax ferries, and large passenger vessels with significant electrical load demands.
✓ Retrofit and overhaul projects on naval auxiliaries, dredgers, and specialised work vessels requiring OEM-equivalent Terasaki switchgear components.
Why Marine Engineers Choose
Marine engineers specify the Terasaki Tempower 2 AR216H for its proven performance in high-current distribution circuits, its compatibility with established Terasaki switchboard assemblies, and the confidence that comes with Japanese-manufactured marine switchgear built to withstand the thermal and operational demands of continuous shipboard service.
Ideal For
Cargo vessels, tankers, bulk carriers, container ships, offshore support vessels, RoPax & passenger ferries, cruise ships, dredgers, and naval auxiliaries requiring high-capacity air circuit breaker protection within main or emergency power distribution systems.
Technical Support
Technical support is available for the Terasaki Tempower 2 AR216H air circuit breaker, covering onboard installation guidance, fault diagnosis, and remote troubleshooting assistance. Support extends to integration within existing Terasaki switchboard configurations and general repair queries.
