N-TDIFVS. Three-phase Differential Protection with Variable Sensitivity Module.
Inputs:
Auxiliary voltage UH: AC/DC 12 V, AC/DC 24 … 380 V.
Voltage range: AC:
0.8. 1.1 UN.
DC: 0.9. 1.25 UN.
N-TDIFVS
Nominal frequency UH: 50 … 400 Hz.
Nominal consumption:
AC 230 V: 4 VA.
AC 24 V: 1.6 VA.
DC 24 V: 1 W.
Measuring value adjustable via rotational switch:
AC 0.01; 0.03 A; 0.1 A; 0.3 A; 0.6 A; 1 A; 2 A; 5 A; 10 A.
Frequency range: 20 Hz. 2 kHz at failure current < 50 Hz and the “auto reset” function, a time delay must
be adjusted, so that the relay does not buzz before switching.
Hysteresis: approx. 4% of trip value, fixed.
Accuracy: ≤ ± 15 %.
Repeat accuracy: ≤ ± 1 %.
Temperature drift: ≤ ± 0,05 % / K.
Reaction time: 10 … 30 ms.
Response delay tv: 0. 10 s adjustable (logarithmic scale in order to allow also short time delay to be
adjusted without problems).
3
Specifications
N-TDIFFR. Three-phase Differential Protection with Automatic Resetting Module.
Test button on residual current device.
Control switch.
Auto On/Auto Off selection flap:
Auto Off: recloser OFF.
REDtest = residual current device.
Auto On: recloser ON. N-TDIFFR
REDtest = residual current device + automatic restart.
Operating mode LED.
N-FAULT. Fault Injection Module with Human Body Impedance Selector.
Fault injection push-button.
