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Specifications
Standby Current:
10mA
working temperature:
-25℃~+70℃
Current Range:
±70A
Voltage - Supply:
±15V
Band Width:
150kHz
Response Time (tr):
1us
Bidirectional Current Detection:
Support
Mfr. Part #:
LA35-NP
Key Attributes
Model Number:
LA35-NP
Product Description
Product Overview
The LA 35-NP is a closed-loop, multi-range current transducer utilizing Hall effect technology for the electronic measurement of DC, AC, pulsed, and mixed currents. It provides galvanic isolation between the high-power primary circuit and the electronic secondary circuit. This transducer offers excellent accuracy, very good linearity, low temperature drift, optimized response time, and a wide frequency bandwidth, making it suitable for various power electronics applications.
Product Attributes
- Brand: LEM
- Certifications: UL 94-V0
- Standards: EN 50178 : 1997
- Insulation: Basic isolation 1700 V, Safe separation 600 V
- Pollution class: 2
Technical Specifications
| Parameter | Value | Unit | Notes |
| Primary nominal r.m.s. current (IPN) | 35 | A | 1) |
| Primary current, measuring range | 0 .. 70 | A | At IP max |
| Measuring resistance (RM min / RM max) | 60 / 150 | With 15 V @ 35 A max | |
| Measuring resistance (RM min / RM max) | 60 / 85 | With 70 A max | |
| Secondary nominal r.m.s. current (ISN) | 35 | mA | |
| Conversion ratio (KN) | 1000 | : 1 | |
| Supply voltage (VC) ( 5 %) | 15 | V | |
| Current consumption (IC) | 10 + IS | mA | |
| R.m.s. voltage for AC isolation test (Vd), 50 Hz, 1 mn | 2.5 | kV | |
| R.m.s. rated voltage (Vb), safe separation | 600 | V | 2) |
| R.m.s. rated voltage (Vb), basic isolation | 1700 | V | |
| Typical accuracy @ IPN, TA = 25C | 0.5 | % | |
| Linearity | < 0.2 | % | Typ |
| Offset current (IO) @ IP = 0, TA = 25C | 0.10 / 0.20 | mA | 3) |
| Residual current (IOM) @ IP = 0, after overload | 0.05 / 0.15 | mA | 4) |
| Thermal drift of IO (- 25C .. + 70C) | 0.15 / 0.50 | mA | |
| Response time (tr) @ 90 % of IPN | < 1 | s | 5) |
| di/dt accurately followed | > 50 | A/s | |
| Frequency bandwidth (- 1 dB) | DC .. 150 | kHz | |
| Ambient operating temperature (TA) | - 25 .. + 70 | C | |
| Ambient storage temperature (TS) | - 40 .. + 85 | C | |
| Primary resistance per turn @ TA = 25C | < 1.25 | m | |
| Secondary coil resistance @ TA = 70C | 80 | ||
| Isolation resistance @ 500 V, TA = 25C | > 1500 | M | |
| Mass | 22 | g |
Applications
- AC variable speed drives and servo motor drives
- Static converters for DC motor drives
- Battery supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Power supplies for welding applications
2501081620_LEM-LA35-NP_C5891324.pdf
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