DatasheetDelta D4-S
Residual current device, 4 DIN modules
| Type | Residual current device for monitoring fault and leakage currents |
|---|---|
| Model | Delta D4-S |
| Format | 4 DIN modules according to DIN 43880 |
| Input | Low-voltage line with TD series transformer |
| Waveform | Sinusoidal, AC type; chopped pulsating with superimposed DC component, A type according to EN 60947-2 Annex B and M / IEC 60947-2 |
| Rated frequency | 50 Hz |
| Working frequency | 47…63 Hz |
| High-frequency note | The effect of high-frequency current is less dangerous; therefore intervention with a higher IΔn value is allowed, making the device more immune to noise from line filters while remaining standards-compatible |
| Residual current setting | Selectable by 7-position potentiometer, 3 ranges ×1 / ×10 / ×100 |
| IΔn ranges | 30 mA…30 A |
| Non-operating residual current | 0.5 × IΔn |
| Intervention time | Selectable by 7-position potentiometer |
| Intervention time ranges | 0 / 0.06 / 0.15 / 0.31 / 0.5 / 1 / 4.5 s |
| Instantaneous trip | t = 0 s at IΔn 30 mA |
| AL2 function | Alarm with 2 SPDT contacts |
| AL50% function | Alarm + 50 % IΔn pre-alarm |
| Alarm relay | Negative or positive safety, selectable by DIP switch |
| Pre-alarm relay | Negative safety, normally de-energized relay |
| Power-on signalling | Green LED “ON” |
| Instantaneous value display | LED bar graph with 4 yellow LEDs, 20 / 30 / 40 / 50 % of the set IΔn value; with IΔn higher than 70 %, 4 LEDs blink |
| Alarm intervention | Red LED “TRIP” and relay switching |
| Ring current transformer-relay connection failure | Red LED “TRIP” blinking and relay switching |
| Pre-alarm | 50 % IΔn, relay switching |
| Manual test | Verifies the residual current relay perfect working |
| Local test | Front key TEST |
| Remote test | By external contact, not available with RD4B21HB |
| Automatic continuous test | Verifies the integrity of the connection between relay and ring core |
| “No trip” test | Checks the working order of the earth leakage relay without switching the output relay |
| Local “no trip” test | By TEST + RESET front keys, sequentially pressing RESET, then TEST and keeping it pressed |
| Alarm memorization | Red LED “TRIP” and relay self-retaining |
| Reset | Manual or automatic, selectable by DIP switch |
| Manual reset | Local or remote |
| Automatic reset | 10 attempts with different times |
| Reset time sequence | 30 s / 1 min / 2 min / 4 min / 8 min / 16 min / 32 min / 64 min / 128 min / 256 min |
| Reset counter | After 30 minutes from the first reset, the attempt counter automatically resets |
| Reset inhibit | With persistent residual current > 50 % IΔn |
| Pre-alarm reset | Automatically resets if the residual current is < 50 % IΔn |
| Output | Alarm relay with 2 SPDT contacts or alarm + pre-alarm depending on function |
| Contact rating | 5 A / 250 VAC at cosφ 1; 3 A / 250 VAC at cosφ 0.4; 5 A / 30 VDC |
| AC auxiliary supply | 24 / 48 / 115 / 230 / 240 / 400 VAC |
| AC tolerance | 0.85…1.1 Uaux; 40…60 V at Uaux 48 V |
| Auxiliary supply rated frequency | 50 Hz |
| Auxiliary supply working frequency | 47…63 Hz |
| AC power consumption | ≤ 2.5 VA |
| DC auxiliary supply | 20…150 VDC |
| Reverse polarity protection | Available |
| DC power consumption | ≤ 2.5 W |
| Short interruption of auxiliary supply | Immunity up to 150 ms |
| Installation category | III |
| Pollution degree | 2 |
| Insulation reference voltage | 450 VAC / 130 VDC, depending on auxiliary supply |
| AC voltage test | 2.5 kV R.M.S., 50 Hz / 1 min |
| Mounting | 35 mm DIN rail |
| Rail type | TH35-15 according to EN / IEC 60715 |
| Connections | Screw terminals for cable up to 4 mm² |
| Housing material | Self-extinguishing polycarbonate |
| Protection degree | IP40 front frame, IP20 terminals |
