Closed loop Hall effect current sensor LEM LT308-S7 SP1 for accurate DC AC pulse current measurement
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Product Description
Product Overview
The LEM LT 308-S7 is a closed-loop Hall effect current sensor designed for measuring DC, AC, and pulse currents. It provides electrical isolation between the primary and secondary sides, offering excellent accuracy, linearity, low temperature drift, fast response time, wide bandwidth, no insertion loss, and high immunity to external disturbances, making it suitable for various industrial applications.
Product Attributes
- Brand: LEM
- Certifications: EN 50178, IEC 61010-1, UL 94-V0 (insulating case)
- Origin: Shanghai Jaren (for socket)
Technical Specifications
| Parameter | Description | Value | Notes |
|---|---|---|---|
| Electrical Parameters | Primary nominal RMS current (IPN) | 300 A | |
| Primary current, measuring range (IPM) | 0 .. 500 A | ||
| Secondary nominal RMS current (ISN) | 150 mA | ||
| Conversion ratio (KN) | 1 : 2000 | ||
| Supply voltage (VC) ( 5 %) | 12 .. 15 V | ||
| Accuracy | Total accuracy @ IPN, TA = 25C (XG) | 0.5 % | |
| Linearity (L) | Typ | ||
| Electrical offset current @ IP = 0, TA = 25C (IOE) | 0.20 mA | Max | |
| Magnetic offset current (IOM) | 0.20 mA | @ IP = 0, overload through 3 x IPN | |
| Temperature drift of IO (IOT) (- 10C .. + 70C) | 0.20 .. 0.64 mA | ||
| Dynamic Parameters | Response time to 10% of IPN (tra) | ||
| Response time to 90% of IPN (tr) | @ 100 A/s di/dt | ||
| di/dt following accuracy | > 100 A/s | ||
| Bandwidth (- 3 dB) (BW) | DC .. 100 kHz | ||
| Measurement resistance (RM) | 0 .. 30 | with 12 V @ 300 A max | |
| 0 .. 7 | with 12 V @ 500 A max | ||
| 0 .. 43 | with 15 V @ 300 A max | ||
| 0 .. 17 | with 15 V @ 500 A max | ||
| Environmental Parameters | Ambient operating temperature (TA) | - 10 .. + 70 C | |
| Ambient storage temperature (TS) | - 25 .. + 80 C | ||
| Secondary coil resistance @ TA = 70C (RS) | 21 | ||
| Isolation Performance | AC isolation test voltage (Vd) | 3.52 kV | RMS, 50 Hz, 1 minute, primary to secondary |
| Impulse withstand voltage (Vw) | 6.5 kV | 1.2/50 s | |
| Creepage distance (dCp) | 10 mm | ||
| Clearance distance (dCI) | 6 mm | ||
| Comparative tracking index (CTI) | 275 | (group IIIa) | |
| General | Mass | 79 g | |
| Dimensions | See diagram | (in mm) |
Advantages
- Excellent accuracy
- Good linearity
- Low temperature drift
- Optimal response time
- Wide bandwidth
- No insertion loss
- Strong immunity to interference
- Current overload capability
Application Scenarios
- AC variable speed drives, servo motors
- DC motor traction static converters
- Battery power supplies
- Uninterruptible Power Supplies (UPS)
- Switch Mode Power Supplies (SMPS)
- Welding power supplies
- Industrial applications
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Company
Changsha Purple Horn E-Commerce Co., Ltd.
Location
2332 Kaibin Commercial Plaza, No. 419 Shaoshan Middle Road, Shazitang Street, Yuhua District, Changsha City, Hunan Province
Contact Person
Coral