Page 96 - Current & voltage sensors catalog

Electronic current sensors
Instructions for mounting and wiring NCS sensors

2 - Mechanical mounting
– All mounting positions are possible: horizontal, vertical, upside down etc.
– Recommended fixing: by screws and flat washers. Oblong fixing holes in the enclosure moulding provide a large amount of mounting flexibility
and allow for fully symmetrical positioning.
– Fixing by the use of side plate kits:
- Fixing on one (or several) cable on one (or several) primary bar: in this case, the sensor should only be fixed to the primary conductor mechani-
cally by the side plate kit. The sensor must not be mechanically fixed to the primary conductor by the enclosure and the side plate kit at the
same time (this type of mounting would lead to mechanical stresses that may deteriorate the enclosure).
- Fixing on a chassis or partition: in this case, the side plate kit offers a large amount of mounting flexibility.
See the particular mounting instructions.

4
Recommendations for the passage of the primary conductor
– The primary conductor may be one (or several) cable or one (or several) bar.
– In order to obtain the best measuring performance, the primary conductor must be:
- Centred as much as possible in the opening in the sensor
- The biggest possible with respect to the opening in the sensor
- Fixed at an angle close to 90° with respect to a plane formed by the sensor
- As straight as possible at the sensor in order to minimise local increases in the magnetic field caused by bends in the primary conductor.
These local increases may create a saturation of one of the sensor probes and induce measurement errors.

For further information, please refer to the "Dimensions" section of the NCS range in this catalogue or to the mounting instructions
ref. 1SBC146000M1704 (NCS125 & NCS165) or ref. 1SBC146010M1701 (NCS305).

1SBC140068S0201

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