Product Overview
The Terasaki TemPower2 AR216S is a heavy-duty air circuit breaker designed to protect generators, transformers, busbars and high-current feeders against overloads, short circuits and optional ground faults.
Terasaki circuit breakers have a substantial marine installed base, making the AR216S important for vessel switchboard maintenance, retrofit projects and urgent replacement requirements.
The breaker is available with different electronic overcurrent releases, operating mechanisms, control voltages, terminal arrangements and protection functions. Therefore, AR216S alone is not sufficient for ordering; the complete nameplate and accessory configuration must be checked.
Main Technical Specifications
| Specification | Details |
|---|---|
| Frame/model | AR216S |
| Maximum rated current | 1,600 A |
| Rated operational voltage | Up to 690 VAC |
| Rated insulation voltage | 1,000 VAC |
| Rated impulse withstand voltage | 12 kV |
| Breaking capacity at 440 VAC | Up to 65 kA |
| Breaking capacity at 690 VAC | Up to 50 kA |
| Short-time withstand rating | Up to 65 kA for 1 second, configuration-dependent |
| Frequency | 50/60 Hz |
| Number of poles | 3 or 4 |
| Mounting | Fixed or draw-out |
| Charging mechanism | Manual or motorized spring charging |
| Closing operation | Manual or electrical |
| Tripping | Electronic overcurrent release |
| Standards | IEC/EN 60947-2 |
| Marine application temperature | Ratings typically referenced at 45°C |
| Main terminal options | Horizontal, vertical or front connection, depending on arrangement |
Specifications are based on the official Terasaki AR2 technical data.
Available Protection Functions
Depending on the fitted AGR electronic trip unit, protection can include:
- L: Long-time overload protection
- S: Short-time short-circuit protection
- I: Instantaneous short-circuit protection
- G: Ground-fault protection
- Generator protection characteristics
- Neutral-pole protection
- Under-voltage protection
- Reverse-power protection
- Current and trip indication
- Pre-trip alarm
- Remote communications
Compatible Trip-Unit Families
The AR216S can be configured with different Terasaki AGR releases, including:
| Trip unit | Typical configuration |
|---|---|
| AGR-11B | Standard dial-adjustable electronic protection |
| AGR-21B | Electronic protection with LCD indication |
| AGR-22B | Enhanced LCD protection and monitoring |
| AGR-31B | Advanced protection, measurement and communications |
The exact trip-unit suffix must be copied from the existing breaker.
Main Features
- High 1,600 A current capacity
- Up to 65 kA breaking capacity
- Compact switchboard footprint
- DoubleBreak contact system
- Fixed and draw-out versions
- Manual or motorized spring charging
- Multiple electronic trip-unit options
- Generator and feeder protection
- High short-time withstand rating
- Mechanical ON/OFF indication
- Spring charged/discharged indication
- Optional remote closing and tripping
- Optional communications and measurement
- Suitable for marine switchboard applications
- Maintenance and replacement parts supported through the Terasaki network
Typical Marine Applications
- Main switchboard incomer
- Diesel-generator breaker
- Bus-tie or bus-coupler breaker
- Emergency switchboard incomer
- Bow-thruster feeder
- Large pump and compressor feeder
- Propulsion auxiliary distribution
- Offshore-platform switchboards
- Shipyard retrofit projects
- Shore-power distribution
Industrial Applications
- Power-generation plants
- Data centres
- Manufacturing facilities
- Mining installations
- Refineries and petrochemical plants
- Water-treatment facilities
- Large commercial buildings
- Transformer incomers
- Main low-voltage distribution boards
Common Accessories
- Motor-charging mechanism
- Shunt trip
- Closing coil
- Under-voltage trip
- Auxiliary contacts
- Position contacts
- Trip indication contacts
- Mechanical interlock
- Electrical interlock
- Door interlock
- Key lock
- Draw-out cradle
- Control-circuit shutters
- Main-circuit shutters
- Remote reset
- Communication module
Important Ordering Checks
Before supplying an AR216S, obtain:
- Clear front and side nameplate photographs
- Complete type designation
- Serial number and manufacturing year
- Rated current and current setting
- 3-pole or 4-pole construction
- Fixed or draw-out version
- Trip-unit model and protection functions
- Main-terminal orientation
- Motor-charging voltage
- Closing-coil voltage
- Shunt-trip voltage
- Under-voltage-trip voltage
- Auxiliary-contact arrangement
- Breaker and cradle requirement
- Marine-class certificate requirement
- New, service-exchange or refurbished condition
- Existing switchboard dimensions and compatibility
