Page 93 - Current & voltage sensors catalog

Glossary
Description of the main current and voltage sensor's characteristics

Secondary current I SN at I PN or at U PN
This is the sensor's output current I S when the input is equal to the nominal primary current I PN or to the nominal primary voltage U PN.

Measuring resistance R M
This is the resistance connected in the secondary measuring circuit between terminal M of the current or voltage sensor and the 0 V of the supply.
The measuring voltage V M at the terminals of this resistance R M is proportional to the sensor's secondary current I S.
It is therefore the image of the sensor's primary current I P or primary voltage U P.

For thermal reasons, a minimum value is sometimes required in certain operating conditions in order to limit overheating of the sensor.
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The maximum value for this resistance is determined by the measuring range.
(see calculation guide and the curve I PMAX or U PMAX = f(R M) opposite).

Accuracy
This is the maximum error for the sensor output I SN for the nominal input value (current or voltage).
This takes into account the residual current, linearity and thermal drift.

AC accuracy
This is the maximum error for the sensor's output I SN for an alternating sinusoidal primary current with a frequency of 50 Hz.
The residual current is not taken into account. The linearity and thermal drift are always included.

No-load consumption current
This is the sensor's current consumption when the primary current (or primary voltage) is zero.
The total current consumption of the sensor is therefore the no-load consumption current plus the secondary current.

All given performance and data included in this catalogue could change.
Dedicated data sheets are the only recognized reference documents for the given performances and data.
See datasheets on:

1SBC140065S0201

http://new.abb.com/low-voltage/sensors

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