ACST Current Transformers – Reliable current detection for protection and monitoring functions
Reliable information about the state of an electrical circuit
The ACST series current transformers are compact components for the reliable detection of alternating currents in electrical systems. They are used wherever the operating status of a circuit needs to be monitored – for example, to determine whether current is flowing, whether a load is active, or whether a fault has occurred.
Thanks to their robust design and easy integration on printed circuit boards, ACST current transformers are ideal for applications in industrial electronics, charging infrastructure, power supplies and control systems.
The proven split-bobbin design ensures high electrical insulation and stable properties during continuous operation.
Technical features and benefits
- Direct PCB mounting (through-hole) for easy integration
- Compact low-profile design for space-saving applications
- High insulation resistance for safe use in mains environments
- Galvanic isolation between power path and electronics
- Reliable current detection for protection and monitoring functions
Why are current transformers used for current detection?
In many electrical applications, precise current measurement is not crucial, but rather reliable information about the state of an electrical circuit. For example, it can be used to detect:
- whether a load is active
- whether a motor or load was actually switched on
- whether an unexpected current flow occurs
- whether an overcurrent or fault condition exists
Current transformers enable this monitoring by detecting the flowing alternating current without contact and generating a proportional electrical signal that can be evaluated by a control or protection circuit.
The galvanic isolation between the primary circuit and the evaluation electronics ensures that this detection can be carried out safely and reliably, even in applications with higher operating voltages.
| Series | IP range | NP / NS | RL | Sekundary | RS | LS | Clearance and creepage | Approvals | Temperature range | L x W x H in mm | Specification |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ACST-262-15 | 0,4 bis 30 A | 1:1500 | 200 Ohm | 123,3, mV/A | 236 Ohm | 5,2 H | 5,5 mm | – | -25°C bis +70°C | 37 x 24 x 15 | ACST-262-15 |
| ACST-262-18 | 0,4 bis 30 A | 1:1500 | 200 Ohm | 123,3, mV/A | 236 Ohm | 5,2 H | 8 mm | – | -40°C bis +70°C | 40 x 25,4 x 21 | ACST-262-18 |
| ACST-265-10 | 0,4 bis 36 A | 1:1000 | 60 Ohm | 58,3 mV/A | 103 Ohm | 500 mH | 4 mm / 5 mm | TÜV | -40°C bis +85°C | 69,4 x 39 x 24 | ACST-265-10 |