current transducer LEM LA35 NP featuring 35 amp primary current and 35 milliamp secondary nominal current

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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		%	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		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		m
Secondary coil resistance @ TA = 70C	80
Isolation resistance @ 500 V, TA = 25C	> 1500	M
Mass	22	g