Alstom P14NB11A2B0510A (MiCOM P14NB Non-Directional Feeder Protection Relay)

Product Description

The Alstom P14NB11A2B0510A belongs to the MiCOM P14NB series, it is a non-directional overcurrent and earth fault feeder protection relay for medium voltage distribution networks. It provides multi-stage phase overcurrent, earth fault, sensitive earth fault protection, breaker failure protection and control functions for radial feeders. This model is widely used in utility substations and industrial MV power systems, supporting fault recording, metering and substation communication.

Features

• Part Number: P14NB11A2B0510A, Brand: Alstom (later GE Grid Solutions MiCOM)
• Series: MiCOM P14NB, non-directional feeder protection relay
• Protection functions: Multi-stage phase overcurrent (IDMT / definite time), earth fault, sensitive earth fault (SEF), breaker failure protection, thermal overload protection
• Communication: Ethernet, Modbus, IEC 60870-5-103, DNP3 optional
• Local HMI: LCD display, keypad, LED status indicators (Trip, Alarm, Healthy, Out of service)
• Logic: Programmable scheme logic, configurable input/output contacts
• Power supply: Wide range DC / AC auxiliary power option
• Certifications: IEC 60255, CE, KEMA type tested
• Manufacturer Status: EOL, Alstom protection business transferred to GE Grid Solutions; aftermarket supply includes NOS surplus and fully tested refurbished units
• Typical gross weight: approx 2.8 kg, origin: UK
• Recording: Fault event records, disturbance recorder for waveform capture

Applications

• Medium voltage radial feeder protection in power distribution substations
• Industrial plant internal MV network, factory auxiliary power feeders
• Renewable energy collector line backup protection
• Oil & gas, petrochemical, mining distribution network protection
• Legacy MiCOM P14NB system maintenance, spare replacement and retrofit

FAQ

Q: What is the difference between P14NB and P14DB?
A: P14NB is non-directional overcurrent relay; P14DB is directional version for looped or meshed distribution networks.

Q: Can P14NB11A2B0510A replace the older P140 series relay?
A: It can be used as a functional upgrade, but CT wiring, auxiliary supply and protection logic settings need re-commissioning.

Q: Does this relay support sensitive earth fault protection?
A: Yes, this suffix variant includes SEF function for high-impedance earthed systems with core balance CT.