Test Leads

The application area of the Power Choke Tester DPG10 series includes small SMD components – the size of a finger nail – to large-scale chokes for energy technology uses, weighing more than 1000 kilograms. This implies that on one hand thin wires, measuring less than 0.5 mm in diameter, are used and on the other hand massive conductor rails up to 20 or 30 mm thick must be connected. The use of four-terminal sensing (Kelvin sensing) is mandatory; otherwise erroneous test results are unavoidable.

The standard cable set with all necessary cables for the operation is of course part of the delivery. The test leads for the four terminal connection to the device under test comprise a special cable for very high test current and a separate cable for the sense line. They are 0.6 m long. The alligator clips are laid out to accept wires up to approximately 20 mm in diameter.

A variety of test leads to meet the different applications are available as optional accessories. Upon request, we assemble customer-specific individual test leads.

PLEASE NOTE: All test leads with 4mm connector can be connected also to the 6 mm sockets of the devices! The test leads with 6mm connector can be connected only to 6 mm sockets.

Kelvin Test Leads

Kelvin clips make the connection of the device under test much easier since the four-terminal sensing can be realised with only 2 clips. Both jaws of the clip are insulated against each other. One jaw carries the measurement current and the other is used as sensing terminal.

The design of our Kelvin test leads is optimised since the uncertainties during the measurement – caused by the inductive coupling between the force lines and the sense lines – are minimised. Therefore, standard Kelvin test leads should not be used even if they are very massive!

Kelvin test leads for small devices under test (KK12-4):

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  • Length: approx. 0.75 m
  • Clampable wire diameter: 0 to 10 mm
  • Max. measuring current: 30 A
  • Avoid use when inductance is < 5 µH (uncertainty will increase)
  • Connector: 4 mm
  • Part number: KK12-4

Kelvin test leads (KK11-4):

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  • Length: approx. 1 m
  • Clampable wire diameter: approx. 1 to 25 mm
  • Max. measuring current: up to 250 A
  • Avoid use when inductance is < 10 µH (uncertainty will increase)
  • Connector: 4 mm
  • Part number: KK11-4

Kelvin test leads for medium-sized devices under test (KK12-6):

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  • Length: approx. 1.2 m
  • Clampable wire diameter: approx. up to 32 mm
  • Max. measuring current: up to 1500 A
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KK12-6

Kelvin test leads for large devices under test (KK11-6):

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  • Length: approx. 1.4 m
  • Clampable wire diameter: approx. up to 35 mm
  • Max. measuring current: up to 4000 A
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KK11-6

Kelvin Test Leads for Extension Units

The following test leads are only for use with our extension units. Depending on the maximum measuring current of the extension unit the 3-phase test lead sets are dimensioned for the appropriate device.

Kelvin test leads for 3-Phase Extension Unit (KK31-4):

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  • Length: approx. 1 m
  • Clampable wire diameter: approx. 1 to 25 mm
  • Max. measuring current: up to 150 ARMS
  • Avoid use when inductance is < 10 µH (uncertainty will increase)
  • Connector: 4 mm
  • Part number: KK31-4

Kelvin test leads for 3-Phase Extension Unit for medium-sized devices under test (KK32-6):

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  • Length: approx. 1.2 m
  • Clampable wire diameter: approx. up to 32 mm
  • Max. measuring current: up to 1000 ARMS
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KK32-6

Kelvin test leads for 3-Phase Extension Unit for large devices under test (KK31-6):

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  • Length: approx. 1.4 m
  • Clampable wire diameter: approx. up to 35 mm
  • Max. measuring current: up to 2500 ARMS
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KK31-6

Conventional Test Leads

For measuring objects that cannot be placed next to the measurement device due to their size or weight, a set of extra long test leads is available. This cable set also provides the opportunity to connect measuring objects with connecting points spaced far apart.

Use of the extra long cable set is only recommended if they are really necessary, since measuring inaccuracies may increase with very small inductance values.

Test Lead Set length 2 m (KL11-4):

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  • Length: approx. 2 m
  • Clampable wire diameter: approx. up to 20 mm
  • Max. measuring current: up to 1500 A
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 4 mm
  • Part number: KL11-4

Test Lead Set length 2 m (KL11-6):

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  • Length: approx. 2 m
  • Clampable wire diameter: approx. up to 20 mm
  • Max. measuring current: up to 1500 A
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KL11-6

Test Lead Set length 2 m (KL13-6)

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  • Length: approx. 2 m
  • Clampable wire diameter: approx. up to 35 mm
  • Max. measuring current: up to 7500 A
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KL13-6

DPG20 Test Lead Set length 2 m (KL11-10)

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  • Length: approx. 2 m
  • Clampable wire diameter: approx. up to 35 mm
  • Max. measuring current: up to 10000 A
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 10 mm (DPG20 only)
  • Part number: KL11-10

Conventional Test Leads for Extension Units

Test Lead Set length 2 m (KL33-6)

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  • Length: approx. 2 m
  • Clampable wire diameter: approx. up to 35 mm
  • Max. measuring current: up to 4500 ARMS
  • Avoid use when inductance is < 30 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KL33-6

Standard Cable Set Replacement Test Leads

For the normal 4-wire measurement we offer our standard test leads. These cables are also included in the test leads set shipped with the DPG10 devices. The following cables listetd for purchasing extra or as replacement.

Force Test Leads length 0.5 m with 4 mm Connectors (KL12-4):

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  • Length: approx. 0.5 m
  • Clampable wire diameter: 0 to 20 mm
  • Max. measuring current: 1500 A
  • Avoid use when inductance is < 2 µH (uncertainty will increase)
  • Connector: 4 mm
  • Part number: KL12-4

Force Test Leads length 0.5 m with 6 mm Connectors (KL12-6):

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  • Length: approx. 0.5 m
  • Clampable wire diameter: 0 to 20 mm
  • Max. measuring current: 1500 A
  • Avoid use when inductance is < 2 µH (uncertainty will increase)
  • Connector: 6 mm
  • Part number: KL12-6

Sense Test Leads length 0.5 m with 4 mm Connectors (KL12-4-S):

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  • Length: approx. 0.5 m
  • Clampable wire diameter: 0 to 20 mm
  • Max. measuring current:  Only for Sense Ports
  • Avoid use when inductance is < 2 µH (uncertainty will increase)
  • Connector: 4 mm
  • Part number: KL12-4-S