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High accuracy current measurement device LEM LF305-S closed loop Hall effect transducer with galvanic separation

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High accuracy current measurement device LEM LF305-S closed loop Hall effect transducer with galvanic separation

Description : Current Sensors RoHS

Mfr. Part # : LF305-S

Model Number : LF305-S

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Product Overview

The LEM LF 305-S is a closed-loop (compensated) current transducer utilizing Hall effect technology for the electronic measurement of DC, AC, and pulsed currents. It provides galvanic separation between the primary and secondary circuits. Designed for industrial applications, it offers excellent accuracy, very good linearity, low temperature drift, optimized response time, and a wide frequency bandwidth with no insertion losses and high immunity to external interference. Its insulating plastic case is recognized according to UL 94-V0.

Product Attributes

Brand: LEM
Material: Insulating plastic case (UL 94-V0)
Certifications: EN 50178: 1997, UL 508: 2010

Technical Specifications

Parameter	Value	Unit	Notes
Primary nominal rms current (IPN)	300	A
Primary current, measuring range	0 .. 500	A
Secondary nominal rms current (ISN)	150	mA
Conversion ratio (KN)	1 : 2000
Supply voltage (UC) ( 5 %)	12 .. 20	V
Current consumption (IC)	26 (+ IS)	mA	@ 20 V
Overall accuracy @ IPN, TA = 25 C (XG)	0.5	%
Linearity error (L)	< 0.1	%	Typ
Offset current @ IP = 0, TA = 25 C (IO)	0.2	mA	Typ
Magnetic offset current @ IP = 0 (IOM)	0.2	mA	Max, after 3 x IPN overload
Temperature variation of IO (-10 C .. +70 C)	0.1 .. 0.3	mA
Temperature variation of IO (-40 C .. +85 C)	0.2 .. 0.7	mA
Reaction time to 10 % of IPN (tra)	< 500	ns
Step response time to 90 % of IPN (tr)	< 1	s	2) With a di/dt of 100 A/s.
di/dt accurately followed	> 100	A/s
Frequency bandwidth (- 1 dB) (BW)	DC .. 100	kHz
Ambient operating temperature (TA)	- 40 .. + 85	C
Ambient storage temperature (TS)	- 40 .. + 85	C
Resistance of secondary winding (RS) @ TA = 70 C	30
Resistance of secondary winding (RS) @ TA = 85 C	32
Mass	95	g
Rms voltage for AC insulation test (Ud)	3.8	kV	50 Hz, 1 min
Impulse withstand voltage (W)	10	kV	1.2/50 s
Creepage distance (dCp)	11.1	mm
Clearance (dCI)	10.6	mm
Comparative tracking index (CTI)	175		(group IIIa)
Primary through-hole diameter	20.1	mm

2410121619_LEM-LF305-S_C454783.pdf

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