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LEM LA55-P SP1 Hall effect current sensor for industrial static converters and variable speed drives

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LEM LA55-P SP1 Hall effect current sensor for industrial static converters and variable speed drives

working temperature : -40℃~+85℃

Current Range : ±100A

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

Band Width : 200kHz

Bidirectional Current Detection : Support

Description : ±100A Through Hole Current Sensors RoHS

Mfr. Part # : LA55-P/SP1

Model Number : LA55-P/SP1

Package : Through Hole

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Product Overview

The LEM LA 55-P/SP1 is a closed-loop (compensated) current transducer utilizing the Hall effect for the electronic measurement of DC, AC, and pulsed currents. It provides galvanic separation between the primary and secondary circuits, featuring an insulating plastic case recognized according to UL 94-V0. This transducer offers excellent accuracy, linearity, and low temperature drift, with a wide frequency bandwidth and no insertion losses, making it suitable for various industrial applications including AC variable speed drives, static converters, UPS, and SMPS.

Product Attributes

Brand: LEM
Model: LA 55-P/SP1
Certifications: UL 94-V0, EN 50178, UL 508
Application Domain: Industrial

Technical Specifications

Parameter	Value	Unit	Notes
Primary nominal RMS current (IP N)	50	A
Primary current, measuring range (IP M)	0 ... 100	A
Secondary nominal RMS current (IS N)	25	mA
Turns ratio (NP/NS)	1 : 2000
Supply voltage (UC) (5 %)	12 ... 15	V
Current consumption (IC) (2)	10 (@ 15 V) + IS	mA
Error @ IP N, TA = 25 C (@ 15 V)	0.65	%
Error @ IP N, TA = 25 C (@ 12 15 V)	0.90	%
Linearity error (L)	< 0.15	%	Typ Max
Electrical Offset current (IO E) @ IP = 0, TA = 25 C	0.10	mA
Magnetic offset current (IO M) @ IP = 0	0.15	mA	after an overload of 3 IP N
Temperature variation of IO (IO T) 25 C +85 C	0.05 ... 0.30	mA
Temperature variation of IO (IO T) 40 C 25 C	0.10 ... 0.50	mA
Delay time to 10 % (tD 10) for IP N step	< 500	ns
Delay time to 90 % (tD 90) for IP N step	< 1	s	For a di/dt = 100 A/s.
Frequency bandwidth (1 dB) (BW)	DC 200	kHz
Ambient operating temperature (TA)	40 +85	C
Ambient storage temperature (TA st)	40 +90	C
Resistance of secondary winding (RS) @ TA = 70 C	145
Resistance of secondary winding (RS) @ TA = 85 C	150
Mass (m)	18	g
RMS voltage for AC insulation test (Ud) 50 Hz/1 min	2.5	kV
Impulse withstand voltage (UNi) 1.2/50 s	4.5	kV
Creepage distance (dCp)	3.8	mm
Clearance (dCI)	3.8	mm
Comparative tracking index (CTI)	600		(group I)

2410311332_LEM-LA55-P-SP1_C454751.pdf

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