Current Transducer LT 4000-S/SP35

IPN=4000 A

For the electronic measurement of currents : DC, AC, pulsed...,with a galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).

Electrical data
IPN
IP
RM

Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistancewith ± 24 V

40000 .. ± 6000
R M min
R M max

AA

000Ω
Ω
Ω

@ ± 2500 A max@ ± 4000 A max@ ± 6000 A max

ISNKNVCICVdSecondary nominal r.m.s. current
Conversion ratio
Supply voltage 1)
Current consumption
R.m.s. voltage for AC isolation test, 50 Hz, 1 mnVe

R.m.s. voltage for partial discharge extinction@ 10 pC

2391800
1 : 5000± 24
41 + IS12 2 )1 3)Features• Closed loop (compensated) current
transducer using the Hall effect• Insulated plastic case recognizedaccording to UL 94-V0.

mA

Special features

VmAkV• V d = 12 k V 2 )• N T = 1000 turns• TA = - 40°C .. + 70°C
• Internal shield connected to theexternal shield

2.5kV± 0.5< 0.1%%• Connection to secondary circuit on
LEMO EGJ. 1B. 305. CYC.

Accuracy - Dynamic performance data
XG

εOverall accuracy @ IPN , TA = 25°C
Linearity error

LTypIO
IOTOffset current @ IP = 0, TA = 25°C
Thermal drift of IO

tr
di/dt
fResponse time 4) @ 90 % of IPN
di/dt accurately followed
Frequency bandwidth (- 1 dB)- 40°C .. + 70°C

± 0.4

Max± 0.8± 0.8<1> 50DC .. 100

mAmA
µs
A/µs
kHz

• Current overload capability.

NTNumber of turns

1000

RTResistance of test circuit @ TA = 70°C22Ω

IT

Test current @ 25 % de IPN

1AGeneral dataNotes :• Excellent accuracy• Very good linearity• Low temperature drift• Optimized response time
• Wide frequency bandwidth• No insertion losses• High immunity to externalinterference

Test circuitTATSRSmAdvantages

Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @ TA = 70°C
MassStandards
1)- 40 .. + 70°C
- 50 .. + 85°C
15Ω
6.3kg
EN 50155 : 1995

± 24 V (- 12.5 %, + 10 %)Between primary and secondary + shield + test3)
Between secondary and test and shield4)With a di/dt of 100 A/µs.
2)

Applications• Single or three phases inverter• Propulsion and braking chopper• Propulsion converter• Auxiliary converter• Battery charger.

Application Domaine• Traction

LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.

LEM Components

041117/4
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Frequency response of LT 4000-S/SP35 in the bandwidth 20 Hz < f < 200 Hz
Line current of 0 A

L ine current of 20 A

L ine current of 400 A

AC current(20...200 Hz)

Amplitude error[ % ]Phase error[°]

Amplitude error[ % ]Phase error[°]

Amplitude error[ % ]Phase error[°]

1 A (at 50 Hz)± 20.6-15± 6.7-3.6± 6.7-3.6

2 A (at 50 Hz)± 11.9-7

± 4.1

-3

± 4.1

-3

Amplitude error : in % of the measured signal
Phase error : in degrees with respect to the measured signal
Maximum amplitude and phase errors for small AC currents added to different DC line currents.

Dimensions LT 4000-S/SP35 ( in mm. 1mm = 0.0394 inch)

Front view

Left view

Top view
Secondary terminals

Connection

Pin
1
Pin
2
Pin
3Pin4Pin
5
Terminal: supply voltage + 24 V: measure: supply voltage - 24 V
: test winding +: test winding : earth

Mechanical characteristics

Remarks• General tolerance• Transducer fastening• IS is positive when IP flows in the direction of the arrow.
• Temperature of the primary conductor should not exceed± 1mm
4 slots ∅ 10.5 mm
4 M10 steel screws
Recommended fastening torque 11.5 Nm or 8.48 Lb. -Ft.
• Primary through-hole∅ 102 mm
• Connection of secondary
LEMO EGJ.1B.305.CYC

100°C.

• Dynamic performances (di/dt and response time) are bestwith a single bar completely filling the primary hole.
041117/4

LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.

LEM Components

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