Würth Elektronik WE-CST & WE-CSTLF Current Sense Transformers
Würth Elektronik WE-CST and WE-CSTLF Current Sense Transformers utilize inductive coupling on a transformer to convert the input and output currents and voltages based on the turns ratio. The current sense transformer features a primary winding with few turns and a secondary winding with many turns. Current passing through the primary induces a current in the secondary, which can then be converted into a measurable voltage using a burden resistor as the load. Therefore, the output voltage is directly proportional to the input current, making the current sense transformer an effective tool for current measurement.
WE-CST transformers feature ferrite core material, suitable for high-frequency measurements. The WE-CSTLF series has high permeability and high saturation flux density laminated core material, suitable for low-frequency applications. Current sense transformers find widespread applications in electrical power systems for various purposes such as current monitoring, protection, and metering. They are commonly used in power distribution networks, electrical substations, industrial facilities, and renewable energy systems.
Features
- WE-CST
- Tiny size and low profile
- Surface mount
- Frequency up to 1MHz
- 80V rated voltage
- -40°C to +125°C operating temperature range
- Primary current rating
- EE4.4: 7A
- EE5: 20A
- WE-CSTLF
- Measures currents up to 45Arms
- Low-frequency range capable from 47Hz to 400Hz
- Stable and high sensing accuracy over 95% over current range
- High dielectric isolation of 4000VAC
Applications
- WE-CST
- High frequency current sensing
- Switching power supplies
- Feedback control
- Overload sensing
- Load drop/shutdown detection
- Metering
- Load measurements
- WE-CSTLF
- Motor control
- Charging station distribution
- Overload sensing
- Load drop/shutdown detection
- Line metering
- Load measurements
- AC current detection