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	 for medium-voltage electrical installations up to 15 kV

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	 for medium-voltage electrical installations up to 35 kV

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ECIT-1s is a family of single-phase combined current and voltage instrument transformers designed for medium-voltage applications (from 3 to 35 kV). Featuring digital outputs, ECIT-1s serves as a data source for measurement, protection, and automation devices.

• Datasheet

ECIT-1S-15

ECIT-1S-35

for medium-voltage electrical installations up to 15 kV

Open image

Hover over to see the location

• Primary contacts

Technical specifications

Order code

Support

Modification	ECIT-1s-15	ECIT-1s-35
Voltage Class	up to 15 kV	up to 35 kV
Rated primary current, In	50 A	50 A
Current accuracy class	0.5S/5PR500	0.5S/5PR500
Rated primary current up to	1250 А	1250 А
Rated short-time thermal current, Ith	25 kA/1 s	25 kA/1 s
Rated dynamic current, Idyn	63 kA	63 kA
Rated primary voltage, Upr, Voltage accuracy class	(3...16)/√3 kV, 0.5/3P	(6...36)/√3 kV, 0.5/3P
Rated primary voltage up to, Um	17.5 kV	40.5 kV
Rated lighting impulse withstand voltage	95 kV	190 kV
Rated short-duration power frequency withstand voltage (1 min)	38 kV	80 kV
Design dimensions, mm weight, kg	284 × 190 × 443 ≤ 10	410 × 190 × 592 ≤ 14
Sampling rate, Hz	14400, 12000
Interfaces	2 × 100Base‑TX (FX LC MM), RSTP, IEC 62439-3 PRP
Protocols	IEC 61850-9-2: 2 × SV (4800, 14400 fps), optional SP (50...4800 fps), IEEE C37.118.2 (1...400 fps), IEC 61850-8-1 GOOSE, IEC 60870‑5‑104, Modbus TCP, web interface
Binary output	140 VAC 0.46 A, 30 VDC 1 A, switching time 5 ms
Time sync	PTPv2 (IEC 61850-9-3), IRIG-A (RS-485)
Disturbance recording	10 records (1+4 s), sampling rate 2400 or 2000 Hz
Relay protection	PVOC, PIOC
Optional	Extended protection and automation suite: PVOC/PDOC, PIOC, SARC, PTEF/PDEF, PTUV, PPBR, RBRF, Busbar Blocking logic, Dead/Live line detection Publication SP, merging SP Three-phase energy metering
Power supply	18...36 VDC, 10 W
Operating conditions	-60(-70)…+50(+60) °С, RH — up to 100 % (+25 °С), 84…106.7 kPa, 1000 m above sea level

Documents

ECIT-1S: datasheet

04.08.2026

Download (279.6 KB )