Merging Unit ENMU

Conforms to IEC 61869-13 stand-alone merging unit standard. 

Сonnects to instrument transformers and protection circuits. 

Broadcasts up to four sampled values streams, IEC 61850-9-2LE, 80 and 256 samples per period Functions as a digital fault recorder. 

Serves as a phasor measurement units, streaming data via IEEE C37.118. 

Measures and transmits electric grid parameters via IEC 60870-5-104 Is equipped with onboard digital inputs and outputs for switchgear control. Communicates via IEC 61850-8-1 as MMS  server and GOOSE publisher/subscriber.

Datasheet

Connection instrument transformers and protection circuits, 4 measurement (M) and 3 protection (P) current inputs, 4 voltage inputs
Rated values/operating range current (M): 1 or 5 A / 1–200 %, current (P): 1 or 5 A / 10-4000 %, line voltage: 100 V / 5–200 %, frequency: 50 Hz / 40–60 Hz
Synchronization source IEEE 1588v2 PTP or IRIG-A/IRIG-B/PPS through ST fiber optic
Accuracy 0.2 DR 1–200, 2TPS, 0.2
Sampling rate 4800 and 12800 Hz (80 and 256 samples per nominal period)
Digital inputs 16 isolated high-voltage (3.75 kV) binary inputs, with programmable upper and lower input thresholds
Digital outputs 10 relays of which 7 are form A relays (6 A 250 VAC, 10 ms operate, 5 ms release) and 3 are solid state relays (3.5 A 250 VDC, 5 ms operate, 0.2 ms release)
Interfaces up to 4 × Ethernet 100Base-FX LC, up to 2 × Ethernet 100Base-T 2 × RS-485, 1 × CAN
Redundancy IEC 62439-3 PRP
Communication protocols IEC 61850-9-2 LE streaming, IEEE C37.118.2, IEC 60870-5-104, FTP, IEC 61850-8-1 (MMS, GOOSE)
Extension modules analog inputs and digital inputs/outputs: up to 240 external I/O units; up to 8192 analog values, 4096 binary signals, 2048 commands
Power supply 120–370 V DC / 100–240 V AC (45–55 Hz), 15 VA
Operating conditions & mounting from −40 to +70 °C / 303 х 254 х 94 mm, IP40