Product Description - GE G30 Instruction Manual

G30 Generator Protection System
Chapter 2: Product description

Product description

This chapter outlines the product, order codes, and specifications.
2.1 Product description
The G30 Generator Protection System is part of the Universal Relay (UR) series of products. It is a microprocessor-based
relay that provides protection, monitoring, control, and recording functions for AC generators driven by steam, gas, or
hydraulic turbine. Current, voltage, and frequency protection are provided along with fault diagnostics.
Voltage, current, and power metering are built in as standard features. Current parameters are available as total
waveform root mean square (RMS) magnitude, or as fundamental frequency only RMS magnitude and angle (phasor).
Diagnostic features include an event recorder that stores 1024 time-tagged events, oscillography capable of storing up to
64 records with programmable trigger, content and sampling rate, and data logger acquisition of up to 16 channels, with
programmable content and sampling rate. The internal clock used for time-tagging can be synchronized with an IRIG-B
signal, using the Simple Network Time Protocol (SNTP) over the Ethernet port, or using the Precision Time Protocol (PTP).
This precise time stamping allows the sequence of events to be determined throughout the system. Events can also be
programmed (via FlexLogic™ equations) to trigger oscillography data capture that can be set to record the measured
parameters before and after the event for viewing on a computer. These tools significantly reduce troubleshooting time
and simplify report generation in the event of a system fault.
Several options are available for communication. An RS232 port (USB port with the graphical front panel) can be used to
connect to a computer to program settings and monitor actual values. The rear RS485 port allows independent access by
operating and engineering staff. It can be connected to system computers with baud rates up to 115.2 kbps. All serial ports
use the Modbus RTU protocol. The IEC 60870-5-103 protocol is supported on the RS485 interface. IEC 60870-5-103, DNP,
and Modbus cannot be enabled simultaneously on this interface. Also only one of the DNP, IEC 60870-5-103, and IEC
60870-5-104 protocols can be enabled at any time on the relay. When the IEC 60870-5-103 protocol is chosen, the RS485
port has a fixed even parity and the baud rate can be either 9.6 kbps or 19.2 kbps. The 100Base-FX or 100Base-TX Ethernet
interface provides fast, reliable communications in noisy environments. The Ethernet port supports IEC 61850, Modbus/
TCP, TFTP, and PTP (according to IEEE Std. 1588-2008 or IEC 61588), and it allows access to the relay via any standard web
browser (G30 web pages). The IEC 60870-5-104 protocol is supported on the Ethernet port. The Ethernet port also supports
the Parallel Redundancy Protocol (PRP) of IEC 62439-3 (clause 4, 2012) when purchased as an option.
Secure Routable GOOSE (R-GOOSE) is supported with software options.
Settings and actual values can be accessed from the front panel or EnerVista software.
The G30 uses flash memory technology that allows field upgrading as new features are added. Firmware and software are
upgradable.
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 2-1