CV

Compact and high accuracy voltage sensors for Industrial and Traction applications

CV - Compact and high accuracy voltage sensors

The CV product family is a compact voltage sensor range ensuring high accuracy for industrial and traction domains. It is designed for the electronic measurement of voltages: DC, AC, pulsed...; with galvanic separation between the primary circuit and the secondary circuit.

CV sensors measure voltages up to 7 kV. The typical accuracy is 0.2 % and 1 % for the CV3 and CV4 series respectively. The bandwidth is from DC to a maximum frequency ranged between 10 kHz and 800 kHz, depending on the selected sensor reference. CV voltage sensors generally include the primary resistor as this value is tuned for optimum performance.

While CV 3 is recommended for low and medium voltage measurements (from 85 to 1400 VRMS with high bandwidth), CV 4 is a perfect fit for high voltage measurements from 2800 to 4242 VRMS with high insulation.

The CV parts are based on the Fluxgate C type closed loop technology. Because of the high sensitivity of the C-type design, the required primary ampere-turns is small, leading to a lower primary inductance and resistance, improving accuracy, bandwidth, and response time.

CV 3, CV 4 – Features and benefits

Main characteristics

Excellent accuracy over a broad operating temperature range
Low primary power consumption
Wide frequency bandwidth and fast response time
Excellent fast dv/dt measurement capability
Very good immunity against surrounding magnetic fields
Very good immunity against common mode voltage variations

Typical applications

Measurement of AC voltages in high power industrial inverters.
Voltage measurement in electric traction converters (DC and AC).
Voltage measurement between phases of power cycloconverters.
Calibration benches for power converters and motors.
Voltage measurement in photovoltaic plants (precise measurement of the maximum power point).
Laboratory measurement instruments: isolated voltage measurement, power measurement for inverters, as an interface with a power analyzer, etc.

LEM CV – Download & Technical Characteristic

CV 3 Series

Product	Document	Primary nominal RMS voltage	Supply Voltage range	Op. Temperature
CV 3-1000	Datasheet 3D	700 V	15 to 15	-40 to 85°C
CV 3-100/SP3	Datasheet	85 V	15 to 15	-40 to 75°C
CV 3-1200	Datasheet	840 V	15 to 15	-40 to 85°C
CV 3-1500	Datasheet 3D	1000 V	15 to 15	-40 to 85°C
CV 3-200	Datasheet 3D	140 V	15 to 15	-40 to 85°C
CV 3-2000	Datasheet	1400 V	15 to 15	-40 to 85°C
CV 3-200/SP5	Datasheet	140 V	15 to 24	-40 to 75°C
CV 3-200/SP6	Datasheet	100 V	15 to 24	-40 to 75°C
CV 3-500	Datasheet 3D	350 V	15 to 15	-40 to 85°C

CV 4 Series

Product	Document	Primary nominal RMS voltage	Secondary Nominal Signal	Supply Voltage range	Op. Temperature
CV 4-4000	Datasheet 3D	2828 V	Voltage	15 to 15	-25 to 70°C
CV 4-4000/SP1	Datasheet 3D	2800 V	Voltage	24 to 24	-40 to 70°C
CV 4-4000/SP2	Datasheet	2800 V	Current	24 to 24	-40 to 70°C
CV 4-6000	Datasheet	4242 V	Voltage	15 to 15	-25 to 70°C
CV 4-6000/SP1	Datasheet 3D	4200 V	Current	24 to 24	-40 to 70°C
CV 4-6000/SP2	Datasheet 3D	4200 V	Voltage	24 to 24	-40 to 70°C

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