Industrial current transducer LEM LT58-S7SP8 offering galvanic isolation and wide frequency bandwidth

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Product Description

Product Overview

The LT 58-S7/SP8 is a closed-loop (compensated) current transducer utilizing Hall effect technology for precise electronic measurement of DC, AC, and pulsed currents. It provides galvanic isolation between the primary and secondary circuits, offering excellent accuracy, linearity, low temperature drift, and a wide frequency bandwidth. This transducer is suitable for industrial applications, including AC and DC motor drives, UPS, SMPS, and welding power supplies.

Product Attributes

Brand: LEM
Certifications: UL 94-V0, EN 50178, IEC 61010-1
Material: Isolated plastic case
Origin: Not specified
Color: Not specified

Technical Specifications

Parameter	Value	Unit	Conditions
Product Name	LT 58-S7/SP8
Primary Nominal Current (IPN)	50	A rms
Primary Current Measuring Range (IPM)	0 .. 70	A
Secondary Nominal Current (ISN)	50	mA rms
Conversion Ratio (KN)	1 : 1000
Supply Voltage (VC)	12 .. 15	V ( 5 %)
Current Consumption (IC)	20 + IS	mA	@ 15 V
Overall Accuracy (XG)	0.8	%	@ IPN, TA = 25C
Linearity Error (L)		%	Typ
Electrical Offset Current (IOE)	0.10	mA	@ IP = 0, TA = 25C
Magnetic Offset Current (IOM)	0.20	mA	@ IP = 0, specified RM, after 3 x IPN overload
Temperature Variation of IO (IOT)	0.35 / 0.64	mA	- 25C .. + 70C
Reaction Time to 10% of IPN step		ns
Response Time to 90% of IPN step		s	With a di/dt of 100 A/s, IPN = 50 A
di/dt Accurately Followed	> 100	A/s
Frequency Bandwidth (- 3 dB) (BW)	DC .. 100	kHz
Ambient Operating Temperature (TA)	- 25 .. + 70	C
Ambient Storage Temperature (TS)	- 40 .. + 85	C
Secondary Coil Resistance (RS)	11		@ TA = 70C
Mass	68	g
Rms Voltage for AC Insulation Test (Vd)	3.52	kV	50 Hz, 1 min, between primary and secondary
Impulse Withstand Voltage (Vw)	6.5	kV	1.2/50 s, between primary and secondary
Creepage Distance (dCp)	10	mm	On housing, OV 3, PD2
Clearance (dCI)	6	mm	On housing, OV 3, PD2
Comparative Tracking Index (CTI)	275		Group IIIa
Rated Insulation Voltage (Basic)	600	V	EN 50178 / IEC 61010-1
Rated Insulation Voltage (Reinforced)	300	V	EN 50178 / IEC 61010-1
Primary Through-hole Diameter	20	mm
Fastening	2 holes 5.4 mm (M5 screws, 1.5 Nm) or 2 notches 4.2 mm (M4 screws, 0.75 Nm)		General tolerance 0.5 mm