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LEM Current Transformer LF 305-S Series 300 A Primary, 150mA Secondary, 12/20 V Supply Voltage LF 305S
Specifications
| Country of Origin | India |
|---|---|
| Brand | LEM |
| Length | 6mm |
| Model | LF 305S |
| Depth | 7mm |
| Gross Weight | 95g |
| Width | 60mm |
| Mount Type | Vertical |
| Series | LF 305-S |
| Maximum Operating Temperature | 85°C |
| Minimum Operating Temperature | -40°C |
| Bore Diameter | 20.1mm |
| Secondary current | 150mA |
| Supply Voltage | 12, 20V |
| Standards/Approvals | EN 50178 |
| Primary Current | 300A |
| Maximum Operating Frequency | 100kHz |
| Turns Ratio | 1 |
| Current transducers LF-S Series for the electronic measurement of currents | dc, ac, pulsed..., with galvanic separation between the primary circuit and the secondary circuit. They are speciallly designed for industrial applications |
| LEM LF 505-S Series Current Transformer 800 A 1 15V, 24 V 30.2mm BoreBrand | LEM |
| LEM LF 205-S Series Current Transformer 420 A 1 12V, 15 V 15.6mm BoreBrand | LEM |
Key Features
- Designed for industrial applications with galvanic separation between primary and secondary circuits.
- Handles primary currents up to 300 A and secondary current of 150mA.
- Operates within temperature range of -40°C to 85°C.
- Compact dimensions with 20.1mm bore diameter and vertical mount type.
- Wide frequency bandwidth up to 100 kHz ensures precise signal measurement.
- High noise immunity and low temperature drift for reliable operation.
- Body constructed from plastic material UL94-V0 rated for safety and durability.
- Compatible supply voltages of 12 V and 20 V enhance versatility.
Product Description
LEM LF 305S Current Transformer from the LF 305-S Series is engineered for precise electronic measurement of currents including DC, AC, and pulsed currents with galvanic separation between circuits. Its design prioritizes high accuracy, noise immunity, and low temperature drift, suited for industrial environments requiring reliable current measurement.
This model supports primary currents up to 300 A with a secondary current rating of 150mA, operating within a temperature range of -40°C to 85°C, making it suitable for harsh environmental conditions. The transformer is constructed using a plastic body rated UL94-V0, ensuring flame retardance and durability.
It features a compact size with dimensions including a bore diameter of 20.1 mm and mounting type vertical, enabling easy installation in various setups. The maximum operating frequency capability of 100 kHz allows for handling wide signal bandwidths for accurate current sensing.
Typical applications include industrial process control, power monitoring systems, automation, and electrical panel instrumentation. Its galvanic separation ensures safety and accurate isolation between primary power lines and measurement circuits.
High accuracy closed loop current measurement. Galvanic isolation protecting measuring instruments and operators. Optimized response time with wide frequency bandwidth. Robust mechanical and electrical stability in industrial settings.
Multiple mounting options for flexible use. Plastic casing compliant with UL94-V0 for fire safety.
The LF 305S from LEM supports critical industrial, laboratory, and manufacturing applications for current measurement. Its reliable performance and safety features make it an excellent choice for automation and process control tasks.
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Frequently Asked Questions
This model supports a primary current rating of 300 A.
The secondary current output is rated at 150 mA.
It operates on compatible supply voltages of 12 V and 20 V.
The maximum operating temperature is 85°C.
It operates within a temperature range of -40°C to 85°C.
The maximum operating frequency capability is 100 kHz.
It has a length of 6 mm, width of 60 mm, depth of 7 mm, and a bore diameter of 20.1 mm.
The LF 305S is designed for vertical mounting.
The body is constructed from plastic material rated UL94-V0 for safety and durability.
It is suitable for industrial process control, power monitoring systems, automation, and electrical panel instrumentation.
This model complies with the EN 50178 standard.
The turns ratio for this current transformer is 1.
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