Solutions   for   Protecting   andManaging   the   Electrical   Network

NP   TA915

Voltage Regulating IED with IEC 61850 protocol

The optimal management of electrical power systems is based in particular on the reliability, availability and communication skills of protection, measurement and automation devices.
NPTA915 is a voltage regulating IED. It comes with current and voltage based protection functions as well making it suitable for combined transformer voltage regulation and back-up protection. Transformer monitoring module included as a standard feature provides for statistical information for preventive maintenance purposes.
The NPTA915 communicates using various protocols including IEC 61850 substation communication standard.

MAIN FEATURES

  Hardware (standard)
  • Large graphic display with customizable mimic
  • Push buttons for local control of the up to 5 objects
  • 16 freely configurable leds
  • 5 current inputs
  • 4 voltage inputs
  • 5+1 output units (standard)
  • 3 digital inputs (standard)
  • 1 Front Ethernet port, 1 rear Ethernet port, 1 rear RS485 port
  Protection Functions
  • Transformer thermal overload [49T]
  • Three-phase overcurrent, 4 stages INST, DT or IDMT [50/51]
  • Earth-fault (sensitive), 4 stages INST, DT or IDMT [50/51N(S)]
  • Harmonic overcurrent / inrush blocking, 4 stages INST, DT or IDMT [50H/51H/68H]
  • Current unbalance / broken conductor, 4 stages INST, DT or IDMT [46R/46L/46]
  • Restricted earth fault protection (low-imp) / Cable-end differential protection [87N]
  • Overvoltage, 4 stages INST, DT or IDMT [59]
  • Undervoltage, 4 stages INST, DT or IDMT [27]
  • Zero sequence overvoltage, 4 stages INST, DT or IDMT [59N]
  • Positive sequence under/overvoltage, negative sequence overvoltage, 4 stages INST, DT or IDMT [59P/27P/47]
  • Overexcitation protection [24]
  • Breaker failure protection [50BF/52BF]
  • Arc protection (option) [50ARC]
  Disturbance and Event recording
  • Up to 100 recordings @ 64 samples/cycle (3.2 kHz)
  • Recording lenght configurable from 0.1 to 1800 seconds
  • Pre trigger configurable from 5 to 95%
  • Non-volatile event records: 15000
  Measurement and Supervision
  • Phase and residual currents (IL1, IL2, IL3, I01, I02)
  • Voltage measurements (UL1-UL3, U12-U31, U0, SS)
  • Current and voltage harmonics (up to 31st)
  • Current THD
  • Frequency (f)
  • Power (P, Q, S, pf)
  • Energy (E+, E-, Eq+, Eq-)
  • Disturbance recorder (3.2 kHz)
  • Current transformer supervision (CTS)
  • Fuse failure (VTS)
  • Trip circuit supervision [74TC]
  Control
  • Automatic voltage regulator [90]
  • Controllable objects: 5
  • 8 setting groups
  Communication protocols standard
  • IEC 61850
  • IEC 60870-5-103/101/104
  • Modbus/RTU, Modbus TCP/IP
  • DNP 3.0, DNP 3.0 over TCP/IP
  • SPA
  Options (3 slots)
  • Digital inputs optional: +8 per card
  • Digital outputs optional: +5 per card (2 cards max.)
  • Arc protection (12 sensors +2xHSO +BI)
  • 2 x mA input + 6-8 x RTD input (2 cards max.)
  • Double LC Ethernet 100Mb
  • RS232 + serial fibre PP/PG/GP/GG (option)

DOWNLOAD AREA

  Device Doc. Type Language Ref. Ind.
NP TA915 Leaflet EN A940 E
NP TA915 User Manual EN A970 A
NP TA915 Connection/Definition Diagram EN S42467 C
Optional Boards Connection/Definition Diagram EN S42506 C