Description
3Ø Digital Motor Protection Relay: SELEC MPR-341-2
- Monitors: Phase loss, Phase unbalance, Phase sequence, Overload trip current, Under / Over current in 3Ø motors.
- Accuracy : 5% of set value.
- 2 C/O output relay.
- Auto / Remote test available.
- MPCT range : 10A – 80A
- Earth Fault Current Measurement with EFCT : 1A to 160A
- Aux supply : 90 – 270V AC / DC
Brief Specifications
| Measuring Parameter | Monitors Over Load (As per NEMA Curve), Over Current, Under Current, Earth Fault, Lock Current, Current Asymmetry, Phase Sequence, Phase Failure |
| Electrical Connection | 3Ø – 3W |
| Test / Reset | Manual / Auto reset |
| No. of LED | 2 |
| Voltage Measuring Range | 90V – 270V AC / DC |
| Earth Fault Current Measurement with EFCT | 31A to 160A |
| Current Measuring Range | 3A – 80A (via external MPCT) |
| Power Consumption | 4VA (max) |
| Output Contact | Trip 1 C/O Alarm 1 C/O (Programmable as Trip / Alarm), Relay Rating NO 5A@250V AC / 28VDCNC 3A@250V AC / 28VDC |
| Accuracy | Time ±5%+100msec Current 5% of IR(Rated Current), Reset Auto / Manual |
| Functional Specifications | Over Load NEMA class : Start with OFF then Curve 5, 10, 15, 20, 30, Over Current Ranges : Start With OFF then 4A TO 480A of IR (Rated Current) Step Size : 1A |
| Time Setting | Over Current Trip Time: 0 – 999sec, Under Current Ranges : Start With OFF then 1A TO 79A, Of IR (Rated Current) Step Size : 1A, Under Current Trip Time: 0 – 999sec, Current Asymmetry Ranges : Start With OFF then 1A TO (Ir-1)A, Of IR (Rated Current) Step Size : 1A, Current Asymmetry Trip time: 0 – 999sec, Locked current / Stall current: (Ir+1)A to 60A(Default :20A), (Ir+1)A to 240A(Default : 80A), (Ir+1)A to 480A(Default: 160A) Step Size : 1A, Locked Current Trip time: 0 – 999sec, Earth Fault Ranges : Start With OFF then 1A TO 160A, Step Size : 1%, Earth Fault Trip time: 0 – 999sec, Phase Loss trip time: Instantaneous, Phase Reversal Trip time: Instantaneous |
| Auto Restart Attempt Time Frame | 0 – 999sec for Current related parameter, 0 – 999sec for EFR |
| Mounting | Panel Mount |
| Size | 96 X 96mm |
