HSTDR, HSNDR, HAM APPLICATION NOTESINFORMATION IN THIS DOCUMENT SHOULD BE USED AS REFERENCE, THEY ARE NOT GUARANTEED VALUESTABLE OF CONTENTS
1HSTDR ..................................................................................................................................................2
1.1

1.1.1

Storage ....................................................................................................................................2

1.1.2

Unpacking ................................................................................................................................2

1.1.3

Handling ...................................................................................................................................2

1.1.4

Installation ................................................................................................................................2

1.1.5

Disassembly .............................................................................................................................2

1.1.6

Mounting ..................................................................................................................................2

1.2

Purpose ....................................................................................................................................3

1.2.2

Return busbar setup .................................................................................................................3

1.2.3

Return busbar influence ...........................................................................................................3

1.2.4

Notes........................................................................................................................................3

Heating generation on busbar due to primary current......................................................................4

1.3.1Setup........................................................................................................................................41.3.2

Heating generation chart according to above condition ............................................................4

1.3.3

Max. duration time to reach the limit 150 °C of busbar according to above condition................ 4

1.4

Max. continuous current versus ambient temperature .....................................................................4

1.4.1

Purpose ....................................................................................................................................4

1.4.2

Specific test setup and limits ....................................................................................................5

1.4.3

Recommendation of max. continuous currents .........................................................................6

1.4.4

Example of test cases ..............................................................................................................6HSNDR .................................................................................................................................................72.1

3

Return busbar disturbance ..............................................................................................................31.2.1

1.3

2

Recommendations for use ..............................................................................................................2

Continuous current vs various ambient temperature .......................................................................72.1.1

Purpose ....................................................................................................................................72.1.2

Specific setup and limits ...........................................................................................................72.1.3

Recommendation of max. continuous currents .........................................................................72.1.4

Example of test cases ..............................................................................................................7HAM ......................................................................................................................................................83.1

Continuous current vs various ambient temperature .......................................................................83.1.1

Purpose ....................................................................................................................................83.1.2

Specific setup and limits ...........................................................................................................83.1.3

Recommendation of max. continuous currents .........................................................................83.1.4

Example of test case ................................................................................................................9

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0Page 1

1 HSTDR
1.1

RECOMMENDATIONS FOR USE

1.1.1

STORAGE
The LEM transducers must be stored in a dry location, within the following ambient room conditions (< 40 °Cand < 60 % RH). The product should be stored in its closed and original packing. Ensure during storage andtransport, the units are not damaged by applying excess weight to the packaging. The transducers mustn’t
be stored more than 2 years. Ensure during storage and transport, the units are not damaged by applying
excess weight to the boxes. Maximal stack-up storage of secondary container (pallet) must not exceed 2.
1.1.2

UNPACKINGWhen unpacking, care must be taken with cutting tools not to damage the transducer.

1.1.3

HANDLING
The LEM transducers must be handled with care and not undergo any shocks or falls (fall=scrap). It is
recommended to handle the transducer as long as possible inside its original packing (thermoform tray on
customer’s assembly station). It is forbidden to handle the transducers by their terminals. To avoid
problems of ESD, it is recommended not to touch secondary terminals. Any rework operations are
forbidden and will conduct part out of LEM warranty.
1.1.4

INSTALLATION
The workshop and the people in contact with the transducers must be ESD protected. Before installing, besure to check that the transducer corresponds to the required application. Be sure that the air gap between
the housing of the transducer and the primary bar is sufficient to avoid damage in case of vibrations.
Do not install (or re-install) a damaged part (broken or crushed element…).
LEM do not recommend customers to make any maintenance on LEM sensors, otherwise it will drive
sensors directly out of warranty.
1.1.5

DISASSEMBLY
Suppress all electricity power before disassembling the transducer.
1.1.6

MOUNTING

1. Recommend that customer’s busbar is mounted under HSTDR, refer to the figure below, to avoid shorten
clearance/creepage distance.
2. Recommend use insulation layer under HSTDR if the HSTDR bottom is close to other metal parts, toavoid potential insulation issue (two auxiliary holes of plastic injection on HSTDR bottom).

Auxiliary holes

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0

Insulation layer

Page 2

1.2

RETURN BUSBAR DISTURBANCE

1.2.1


1.2.2




PURPOSE

Purpose is to present return busbar disturbance with busbar shapes, this can be referredduring structure design.

RETURN BUSBAR SETUPThis shape is the most influential case
The busbar dimension for test: 22 mm(Width)x4mm(Thickness).
Environment: 25 °C.

1.2.3

RETURN BUSBAR INFLUENCE
Difference of the Uout between the return busbar (C-shape) vs reference (straight busbar).

1.2.4
NOTESDue to the complexity of practical application, the examples cannot cover all the application
conditions.

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0Page 3

1.3

HEATING GENERATION ON BUSBAR DUE TO PRIMARY CURRENT

1.3.1

SETUP

Condition- Inside climate chamber- 55 °C setting up in chamber- IP range: 100 A -1500 ADC- Mounting: refers to picture- Test points: middle of busbar, inside DUT

HST series:- Cu-ETP- Section: 3 x 16.7 (mm)- Length: 39 mm- Resistance: 20 μΩ

Distribution busbar besides:- Cu-ETP- Section: 3 x 16.7 (mm)- Length: 200 mm* Busbars besides aredesigned to simulate the application in customer system

1.3.2

HEATING GENERATION CHART ACCORDING TO ABOVE CONDITION

1.3.3

MAX. DURATION TIME TO REACH THE LIMIT 150 °C OF BUSBAR ACCORDING TOABOVE CONDITIONThe result is for reference only according to certain condition as above.
If the profile of primary current is over than the limit, please consider enlarging the section of busbar
besides.

1.4

MAX. CONTINUOUS CURRENT VERSUS AMBIENT TEMPERATURE

1.4.1

PURPOSETo verify the maximum acceptance continuous IP current value at different ambient temperatures.
The typical values of the test can be used by the customer for reference during design.

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0Page 4

1.4.2


SPECIFIC TEST SETUP AND LIMITS
Environment: Ambient temperature of sensor inside climate chamber
25 °C, 45 °C, 65 °C, 85 °C, 105 °C, 125 °C
Keep ambient temperature stable due to the cooling system of climate chamber.
IP range: 100A to 1500A
Test points: refers to picture.
101<core>：Magnetic core temperature monitor point, limited 150 °C
102<ASIC>：ASIC temperature monitor point, limited 125 °C
103<busbar>：Extend Busbar temperature monitor point, limited 150 °C

101<core>

102<ASIC>

103<busbar>

Overall setup

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0Page 5

1.4.3

RECOMMENDATION OF MAX. CONTINUOUS CURRENTS
Max. continuous current versus ambient temperatureContinuous current (A)800

1.4.4700
600
500400300
2001000254565

Ambient temperature (℃)

85105125

EXAMPLE OF TEST CASES

 Max. continuous current at 85°C is 400A.

temperature (℃)

Continuous current @85℃
160150140130120
110
1009080

400A
300A

200A

100A
101 <Core> (C)102 <ASIC> (C)103 <BUSBAR> (C) Max. continuous current at 105°C is 300A.

Continuous current @105℃
temperature (℃)

160150140300A

130120110100A200A

100
101 <Core> (C)102 <ASIC> (C)HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0103 <BUSBAR> (C)Page 6

2 HSNDR
2.1

CONTINUOUS CURRENT VS VARIOUS AMBIENT TEMPERATURE

2.1.1

PURPOSETo verify the maximum acceptance continuous IP current value at different ambient temperatures.
The typical values of the test can be used by the customer for reference during design.

2.1.2

SPECIFIC SETUP AND LIMITS
Similar setup and procedure as HST family, for details, see §1.4.2.

2.1.3

RECOMMENDATION OF MAX. CONTINUOUS CURRENTS
Continuous current versus ambient temperatureContinuous current (A)

800

2.1.4

700
600
500
4003002001000254565

Ambient temperature（℃）

85105125

EXAMPLE OF TEST CASES

 Max. continuous current at 85°C is 500A.

temperature (℃)

Continuous current@85℃
1601501401301201101009080500A
400A

100A

200A

101 <Core>

300A

102 <ASIC>

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0103 <BUSBAR>

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Max. continuous current at 105°C is 400A.

Continuous current@105℃temperature(℃)

160150400A

140300A

130120110100A

200A

100101<Core>

102 <ASIC>

103 <BUSBAR>

3 HAM
3.1

CONTINUOUS CURRENT VS VARIOUS AMBIENT TEMPERATURE

3.1.1

PURPOSETo verify the maximum acceptance continuous IP current value at different ambient temperatures.
The typical values of the test can be used by the customer for reference during design.

3.1.2

SPECIFIC SETUP AND LIMITS
Similar setup and procedure as HST family, for details, see §1.4.2.

The limit of 250A is defined by the measuring range (not because of thermal limitation).

3.1.3

RECOMMENDATION OF MAX. CONTINUOUS CURRENTS
Continuous current versus ambient temperatureContinuous current (A)300
250200150
100500254565

Ambient temperature (℃)

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 085105125

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3.1.4EXAMPLE OF TEST CASE

 Max. continuous current at 85°C is 250A.

temperature(℃)

Continuous current@85℃
1601501401301201101009080

100A 125A150A

101<Core>

175A

200A

102 <ASIC>

250A

225A

103 <BUSBAR>

 Max. continuous current at 105°C is 225A.

Continuous current@105℃temperature (℃)

160150140130120110100A125A150A175A

200A

225A

100
101<Core> (°C)

102 <ASIC> (°C)

HSTDR, HSNDR, HAM APPLICATION NOTE – ANE230327/Version 0

103 <BUSBAR> (°C)

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