XA30

The XA30 protection relay is designed to ensure maximum safety and reliability for medium-voltage (MV) electrical networks. It is the ideal solution for industrial plants, power distribution systems, and applications requiring advanced protection for lines and transformers.

Key Applications

Long radial lines in systems with isolated neutral or grounded through Petersen coil and/or high-value resistance.
Protection on the LV side of parallel transformers, regardless of the neutral grounding system.
Earth fault protection for generators or generator-transformer busbars connected in parallel to the same busbar.

The XA30 relay provides general protection for MV distribution networks, supporting overcurrent protection and directional earth fault protection for critical infrastructures.

Main Features of XA30 Protection Relay

Graphic LCD display with single-line diagram integration
6 digital inputs for enhanced flexibility
High-precision measurements with event recording (SER), fault recording (SFR), and disturbance recording (DFR)
Modular and expandable hardware for scalable solutions
Advanced communication options:

Front USB port
Ethernet port with Modbus TCP/IP and IEC 61850 protocols
Enhanced IEC 61850 for interoperability

Embedded programmable logic (IEC 61131)
ThyVisor PC software for easy configuration
Integrated Web Server (optional) for remote diagnostics
Integrated datalogger for operational monitoring
Modbus Master function (optional): concentrator for up to 4 devices via RS485

FUNCTIONS

STANDARD PROTECTIVE & CONTROL ELEMENTS

Negative sequence overcurrent - 46LT
Maximum Residual Overcurrent - 50N/51N(1)
Low impedance restricted earth fault - 64REF
CT Supervision - 74CT
Trip Circuit Supervision - 74TCS
Remote TRIP
Second Harmonic Restraint
Automatic Recloser - 79
Residual Overvoltage - 59N
CEI 0-16
Negative /positive sequence current ratio - I2/I1
Ground directional overcurrent - 67N
Thermal Image Transformer - 49LT
Breaker Failure - BF
Phase overcurrent side H and side L - 50/51

Thermal with Pt100 Probes - 26

COMMUNICATION FUNCTIONS

Modbus TCP-IP
One USB Type B local port for communication with ThyVisor setup software
Modbus protocol RTU RS485 / IEC 870-5-103 / DNP3
IEC61850 Ed.1 & Ed. 2

DOWNLOADS

Coding-XA30-07-2025_EN

XA30 Operating Manual

XA30 Flyer

RELATED PRODUCTS

NA10

Thytronic's NA10 relay is used on radial-type networks to protect power lines and transformers and can be used as general protection forusers connected to the MV distribution network in accordance with CEI 0-16, in applications where maximum current and ground fault protection functions are provided. In systems with a grounded neutral, it provides reliable protection against ground faults on lines of any length. In systems with an isolated neutral, where the connection to ground is made through Petersen coil or resistor, ground-fault protection, on the other hand, is employed only on lines of limited length. This approach avoids untimely tripping due to the contribution of the line's capacitive current to external faults.

Features of the NA10 general protection relay

Standard protection and control functions of the Thytronic NA10 relay include maximum phase current and residual current monitoring, ensuring complete protection against overloads and faults. The breaker failureand phase overcurrent funtions contribute to system safety and control. In addition, the relay offers trip circuit supervision and meets the requirements of the Italian standard CEI 0-16, ensuring operation in accordance with safety standards.

Optionally, the integration of protection function 26 for machine temperature measurement using Pt100 thermometer probes is available. Regarding communication functions, the relay is equipped with a USB type B port, facilitating communication with ThyVisor configuration software for easy configuration and effective system monitoring.

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