<h3>Delta 72-F</h3>
Residual current device for industrial applications, 72 × 72 mm
<div class=”table-responsive”>
<table class=”table”>
<tbody>
<tr>
<th>Type</th>
<td>Residual current device for monitoring fault and leakage currents in industrial applications</td>
</tr>
<tr>
<th>Model</th>
<td>Delta 72-F</td>
</tr>
<tr>
<th>Ordering code</th>
<td>RD2E2…</td>
</tr>
<tr>
<th>Technical note</th>
<td>NT745</td>
</tr>
<tr>
<th>Format</th>
<td>72 × 72 mm</td>
</tr>
<tr>
<th>Ranges</th>
<td>19 ranges: 0.03…30 A; 18 ranges: 0.5…30 A</td>
</tr>
<tr>
<th>Instantaneous electrical trip</th>
<td>Instantaneous trip t = 0 s at IΔn 30 mA</td>
</tr>
<tr>
<th>Waveform</th>
<td>Sinusoidal, AC type; chopped pulsating with superimposed DC component, A type</td>
</tr>
<tr>
<th>Filter for harmonics</th>
<td>Fixed</td>
</tr>
<tr>
<th>Standard</th>
<td>EN 60947-2 / IEC 60947-2</td>
</tr>
<tr>
<th>Alarm</th>
<td>2 relay outputs or 1 output + pre-alarm</td>
</tr>
<tr>
<th>IΔn display</th>
<td>LED bar graph</td>
</tr>
<tr>
<th>Relay output</th>
<td>2 SPDT</td>
</tr>
<tr>
<th>Security</th>
<td>Positive or negative safety selectable</td>
</tr>
<tr>
<th>Test</th>
<td>Local and automatic; remote test not available with 20…150 VDC + 48 VAC</td>
</tr>
<tr>
<th>Reset</th>
<td>Local or remote</td>
</tr>
<tr>
<th>Auxiliary supply</th>
<td>230 VAC / AC; 24…48 / 115…240 / 400 VAC; 20…150 VDC</td>
</tr>
<tr>
<th>Input</th>
<td>Low-voltage line with TD series transformer</td>
</tr>
<tr>
<th>Rated frequency</th>
<td>50 Hz</td>
</tr>
<tr>
<th>Working frequency</th>
<td>47…63 Hz</td>
</tr>
<tr>
<th>Residual current setting</th>
<td>Selectable by 7-position potentiometer, 3 ranges ×1 / ×10 / ×100</td>
</tr>
<tr>
<th>Non-operating residual current</th>
<td>0.5 × IΔn</td>
</tr>
<tr>
<th>Intervention time</th>
<td>Selectable by 7-position potentiometer</td>
</tr>
<tr>
<th>Intervention time ranges</th>
<td>0 / 0.15 / 0.25 / 0.5 / 1 / 2.5 / 5 s</td>
</tr>
<tr>
<th>Pre-alarm</th>
<td>50 % of IΔn, relay switching</td>
</tr>
<tr>
<th>Power-on signalling</th>
<td>Green LED “ON”</td>
</tr>
<tr>
<th>Instantaneous value display</th>
<td>LED bar graph with 4 yellow LEDs, 20 / 30 / 40 / 50 % of the set IΔn value</td>
</tr>
<tr>
<th>Alarm intervention</th>
<td>Red LED “TRIP” and relay switching</td>
</tr>
<tr>
<th>Ring current transformer fault</th>
<td>Red LED “TRIP” blinking and relay switching</td>
</tr>
<tr>
<th>Alarm memorization</th>
<td>Red LED “TRIP” and relay self-retaining</td>
</tr>
<tr>
<th>Reset inhibit</th>
<td>With persistent residual current &gt; 50 % IΔn</td>
</tr>
<tr>
<th>Contact rating</th>
<td>5 A / 250 VAC at cosφ 1; 3 A / 250 VAC at cosφ 0.4; 5 A / 30 VDC</td>
</tr>
<tr>
<th>Installation category</th>
<td>III</td>
</tr>
<tr>
<th>Pollution degree</th>
<td>2</td>
</tr>
<tr>
<th>Insulation reference voltage</th>
<td>450 V</td>
</tr>
<tr>
<th>Impulse withstand voltage</th>
<td>5 kV, 1.2/50 µs, 0.5 J</td>
</tr>
<tr>
<th>Operating temperature</th>
<td>-5…50 °C</td>
</tr>
<tr>
<th>Storage temperature</th>
<td>-40…70 °C</td>
</tr>
<tr>
<th>Protection degree</th>
<td>IP40 front, IP20 terminals</td>
</tr>
<tr>
<th>Depth</th>
<td>75 mm</td>
</tr>
<tr>
<th>Weight</th>
<td>250 g</td>
</tr>
</tbody>
</table>
</div>