LEM电流电压传感器说明书

LEM电流电压传感器说明书
LEM电流电压传感器说明书
Current Transducer LTSR 25-NP
For the electronic measurement of currents : DC, AC, pulsed, mixed,with a galvanic isolation between the primary circuit (high power)and the secondary circuit (electronic circuit).
I PN = 25 At
Electrical data
I PN I P
V OUT V REF N
S R LC LR IM
TCR IMV C I C
Primary nominal r.m.s. currentPrimary current, measuring rangeAnalog output voltage @I P
I P = 0
Voltage reference (internal reference), refout mode
Voltage reference (external reference), refin mode
Number of secondary turns (± 0.1 %)Load resistance
Max. capacitive loading
Internal measuring resistance (± 0.5 %)Thermal drift of R IM
Supply voltage (± 5 %)
Current consumption @ V C = 5 VTyp
0 .. ± 80 At 2.5 ± (0.625·I P /I PN ) V 2.5 2) V 2.5 3)
1.9 ..
2.7
2000≥ 2k Ω500pF 50Ω
Features
•Closed loop (compensated) multi-•••••••
range current transducer using theHall effect
Unipolar voltage supply
Insulated plastic case recognizedaccording to UL 94-V0
Compact design for PCB mountingIncorporated measuring resistanceExtended measuring rangeAccess to the internal voltagereference
Possibility to feed the transducerreference from external supply.
Accuracy - Dynamic performance data
Advantages
± 0.2± 0.7
Accuracy @ I PN , T A = 25°C
Accuracy with R IM @ I PN , T A = 25°CLinearity error
TCV OUT Thermal drift of V OUT / VREF @ IP = 0TC εG V OM
- 40°C .. + 85°C37.5 ppm/K
Thermal drift of the gain- 40°C .. + 85°C50 6) ppm/KResidual voltage @ IP = 0, a fter an overload of3 x I PN ± 0.5mV
5 x I PN ± 2.0mV 10 x I PN ± 2.0mV
Thermal drift of internal VREF @ IP = 0 - 10°C .. + 85°C 50ppm/K
- 40°C .. - 10°C 100ppm/K
Reaction time @ 10 % of I PN 60A/µsFrequency bandwidth(0 .. - 0.5 dB)DC .. 100kHz
(- 0.5 .. 1 dB)DC .. 200kHz Ambient operating temperature
Ambient storage temperatureMass
Standards
- 40 .. + 85- 40 .. + 10010
EN 50178 : 1997I EC 60950-1 : 2001
•••••••
Excellent accuracyVery good linearity
Very low temperature driftOptimized response timeWide frequency bandwidthNo insertion losses
High immunity to externalinterference
•Current overload capability.
TCV REF t ra t r
Applications
•AC variable speed drives and servo•••••
motor drives
Static converters for DC motor drivesBattery supplied applications
Uninterruptible Power Supplies (UPS)Switched Mode Power Supplies (SMPS)Power supplies for weldingapplications.
General data
T A T S m
Application Domain
•Industrial.
Copyright protected.
see overleaf.
051123/6
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
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Current Transducer LTSR 25-NP
Isolation characteristics。