Hall effect current sensor LEM LT308-S7 designed for accurate DC AC pulse current sensing in industry

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Product Description

Product Overview

The LEM LT 308-S7 is a closed-loop (compensated) current sensor utilizing Hall effect technology. It provides insulated measurement of DC, AC, and pulse currents with excellent accuracy, good linearity, low temperature drift, and fast response time. Its wide bandwidth and no insertion loss make it suitable for various industrial applications.

Product Attributes

Brand: LEM
Certifications: EN 50178, IEC 61010-1, UL 94-V0 (insulating housing)

Technical Specifications

Parameter	Value	Unit	Notes
Product Name	LT 308-S7		Current Sensor
Primary Rated RMS Current (IPN)	300	A
Primary Current, Measuring Range (IPM)	0 .. 500	A
Secondary Rated RMS Current (ISN)	150	mA
Conversion Ratio (KN)	1 : 2000
Supply Voltage (VC) ( 5 %)	12 .. 15	V
Current Consumption (IC)	28 (@ 12V) + IS	mA
Overall Accuracy @ IPN, TA = 25C (XG)	0.5	%
Linearity (L)		%	Typ
Electrical Offset Current @ IP = 0, TA = 25C (IOE)	0.20	mA
Magnetic Offset Current @ IP = 0, overload 3 x IPN (IOM)	0.20	mA	1)
Temperature Drift of IO (- 10C .. + 70C) (IOT)	0.20 .. 0.64	mA
Response Time to 10 % of IPN (tra)		ns
Response Time to 90 % of IPN (tr)		s	2)
di/dt Follower Accuracy	> 100	A/s
Bandwidth (- 3 dB) (BW)	DC .. 100	kHz
Environmental Operating Temperature (TA)	- 10 .. + 70	C
Environmental Storage Temperature (TS)	- 25 .. + 80	C
Secondary Coil Resistance @ TA = 70C (RS)	21
Mass (m)	79	g
AC Isolation Test Voltage (Vd) (RMS), 50 Hz, 1 min	3.52	kV	1)
Impulse Withstand Voltage (Vw) 1.2/50 s	6.5	kV
Creepage Distance (dCp)	10	mm	2)
Electrical Clearance (dCI)	6	mm	2)
Comparative Tracking Index (CTI) (group IIIa)	275
Load Voltage Category	OV 3
Pollution Degree	PD2
Primary Through-Hole Diameter	20	mm
Mounting Holes	2 holes 5.4 mm