Technical Specification
| Inputs |
|
| Analogue inputs |
12, VTs, CTs or transducers |
| Frequency response |
30Hz – 3kHz (VT), DC – 3kHz (CT) |
| Sampling scheme |
True synchronous sampling |
| Quantising resolution |
16 bits (65535 levels) |
| Accuracy |
Better than 0.1% of scale |
| VT |
|
| - input |
150V AC max. Phases isolated |
| - burden |
24mW (500kR) |
| - isolation |
2.5kV AC |
| CT |
|
| - input |
External interposing CT (clamp, toroidal, etc) |
| - range |
Scaled for load or fault levels |
| Contact inputs |
16 |
| - wetting voltage |
30, 50, 110 & 220V DC. Polarity indepedent |
| - debounce |
0 – 10 mS |
| Recording |
|
| Waveform recording (DFR) |
|
| - sampling rate |
128 samples per cycle. (6.4kHz or 7.68kHz, 50 or 60Hz) |
| - recording time |
4-10 cycles pre event, 8-60 cycles post event |
| RMS/swing recording (DFR) |
|
| - channels |
Up to 50 selected parameters Voltage, current, frequency, apparent, real & reactive power, NPS, ZPS, etc. |
| - sampling rate |
50 or 60Hz |
| - recording times |
2-10s pre-event, 10-60s post event |
| Trend recording |
|
| - channels |
~ 800 parameters. Voltage, current & frequency, apparent, real & reactive power, NPS, ZPS, power factor, flicker, imbalance and harmonics |
| - sampling rate |
Max, min & avg every 10 minutes |
| - duration |
26 weeks rotating buffer |
| RMS log recording (DDR) |
|
| - channels |
Up to 12 selected parameters(as RMS/swing) |
| - sampling rate |
10 samples per second |
| - recording time |
14 day rotating buffer |
| Operating Limits |
|
| Voltage |
Maximum & minimum value,rate of change |
| Current |
Rate of change |
| Frequency |
Maximum & minimum value, rate of change |
| Real Time Clock |
|
| Crystal |
Temperature compensated 32kHz |
| Drift |
Better than 4 ppm (~ 2s per week) |
| Synchronisation |
GPS (optional) |
| GPS 1PPS accuracy |
better than 1uS |
| Data storage |
|
| Buffer storage |
16Mbytes |
| Program and data storage |
1024Mbytes flash memory |
| Interface functions |
|
| User interface (local or remote) |
Web browser (Internet Explorer, Firefox, etc) |
| Event report delivery |
Email, SMS or fax |
| Data file format |
COMTRADE (IEEE C37.111-1999) |
| Synchrophasor (PMU) |
IEEE C37.118 (2005) |
| Communications |
|
| Modem |
|
| - baud rate |
Up to 56 kbaud |
| - DTE rate |
Up to 115 kbaud |
| - line isolation |
3kV |
| - data protocol |
PPP |
| - connector |
RJ11 |
| LAN |
|
| - data rate |
10/100 Mbps |
| - protocol |
TCP/IP |
| - connector |
RJ45 |
| SCADA |
|
| - Modbus |
RS485/TCP |
| Network services |
HTTP, SMTP |
| Status LEDs |
|
| Top panel |
System OK (green) Battery OK (green) Event available (green) Serial comms (orange) Data-storage access (orange) Comms error (red) Sync error (red) Attention (red) |
| Network connector |
Rx packet (orange) Tx packet (green) |
| Status Relays |
|
| Outputs |
4 |
| Contact rating |
400VDC, 1A continuous |
| Surge current |
5A for 1s |
| Isolation |
3.75kV AC |
| Relay type |
Solid state (IGBT) |
| Functions |
System OK (N/C) Event (N/O) Attention (N/O) |
| Power Supply |
|
| Standard supply |
110/230VAC 50/60Hz and 110/220VDC |
| DC supply (option) |
30V or 50VDC |
| Battery back up (option) |
External 12V gell cell |
| Battery support time |
>2 Hrs (0.8 Ah battery) |
| Power consumption |
< 4W |
| Enclosure |
|
| DIN rail enclosure |
|
| – size |
315 x 110 x 75 mm |
| – weight |
1.4 kg (3V & 9I) |
| Portable enclosure |
|
| - size |
406 x 330 x 174 mm |
| - weight |
5.2 kg |
| Wall mounting cabinet |
|
| - size |
400 x 300 x 210 mm |
| - weight |
11.5 kg |
| Environment |
|
| Operating temperature |
-5 to 60 Deg C |
| Relative humidity |
up to 95% |
eMS Ltd reserves the right to update this specification without notice.
