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Insulated current sensor LEM LT58-S7 designed for measurement of DC AC and pulse currents in power supplies

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Insulated current sensor LEM LT58-S7 designed for measurement of DC AC and pulse currents in power supplies

working temperature : -10℃~+70℃

Current Range : ±70A

Voltage - Supply : -15V~-12V;12V~15V

Band Width : 100kHz

Bidirectional Current Detection : Support

Description : ±70A Current Sensors RoHS

Mfr. Part # : LT58-S7

Model Number : LT58-S7

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Product Overview

The LT 58-S7 is an insulated current sensor designed for measuring DC, AC, and pulse currents. It offers high accuracy, good linearity, low temperature drift, fast response time, wide bandwidth, and immunity to external magnetic fields. Its applications include variable speed drives, servo motors, DC motor traction, battery power supplies, UPS, SMPS, and welding power supplies.

Product Attributes

Brand: LEM
Certifications: EN 50178, UL 94-V0 (insulating housing)
Origin: China (implied by Shanghai Jiaren mention)

Technical Specifications

Parameter	Value	Unit	Notes
Electrical Parameters
Primary Rated RMS Current (IPN)	50	A
Primary Current Measuring Range (IPM)	0 .. 70	A
Secondary Rated RMS Current (ISN)	50	mA
Conversion Ratio (KN)	1 : 1000
Supply Voltage (VC)	12 .. 15	V	( 5 %)
Current Consumption (IC)	28 (@ 12V) + IS	mA
Accuracy - Dynamic Parameters
Overall Accuracy @ IPN, TA = 25C (XG)	0.8	%
Linearity (L)	< 0.2	%	Typ
Voltage Output Offset @ IP = 0, TA = 25C (IOE)	0.20	mA
Magnetic Offset Current @ IP = 0, overload 1 x IPN (IOM)	0.10	mA	1)
Temperature Drift of IO (-10C .. +70C) (IOT)	0.35 .. 0.64	mA
Response Time @ 10% of IPN (tra)	< 500	ns
Response Time @ 90% of IPN (tr)	< 1	s	2)
di/dt Following Accuracy	> 100	A/s
Bandwidth (- 3 dB) (BW)	DC .. 100	kHz
General Parameters
Ambient Operating Temperature (TA)	- 10 .. + 70	C
Ambient Storage Temperature (TS)	- 25 .. + 80	C
Secondary Coil Resistance @ TA = 70C (RS)	11
Mass (m)	64	g
Electrical Isolation Performance
AC Isolation Test Voltage RMS (Vd)	3.52	kV	1), 50 Hz, 1 min
Impulse Withstand Voltage (Vw)	6.5	kV	1.2/50 s
Creepage Distance (dCp)	10	mm	2)
Electrical Clearance (dCI)	6	mm	3)
Comparative Tracking Index (CTI)	275		(group IIIa)
Measurement Resistance (RM)
RM min with 12 V @ 50 A	0
RM max with 12 V @ 70 A	140
RM min with 15 V @ 50 A	0
RM max with 15 V @ 70 A	200

1912111437_LEM-LT58-S7_C454764.pdf

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