Product Description; Introduction; Overview - GE C60 Instruction Manual

2 PRODUCT DESCRIPTION

2 PRODUCT DESCRIPTION 2.1INTRODUCTION
The C60 Breaker Protection System is a microprocessor based relay designed for breaker monitoring, control and protec-
tion.
Voltage, current, and power metering is built into the relay as a standard feature. Current parameters are available as total
waveform RMS magnitude, or as fundamental frequency only RMS magnitude and angle (phasor).
Diagnostic features include an event recorder capable of storing 1024 time-tagged events and oscillography capable of
storing up to 64 records with programmable trigger, 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
which may be set to record the measured parameters before and after the event for viewing on a personal computer (PC).
These tools significantly reduce troubleshooting time and simplify report generation in the event of a system fault.
Several options are available for communication. A faceplate RS232 port can be used to connect to a computer for the pro-
gramming of settings and the monitoring of actual values. The RS232 port has a fixed baud rate of 19.2 kbps. 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-T Ethernet interface provides fast, reliable communications in noisy environments. The
Ethernet port supports IEC 61850, Modbus/TCP, and TFTP protocols, PTP (according to IEEE Std. 1588-2008 or IEC
61588), and allows access to the relay via any standard web browser (C60 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.
Settings and actual values can be accessed from the front panel or EnerVista software.
The C60 IEDs use flash memory technology which allows field upgrading as new features are added. The following Single
line diagram illustrates the relay functionality using ANSI (American National Standards Institute) device numbers.
Table 2–1: ANSI DEVICE NUMBERS AND FUNCTIONS
DEVICE FUNCTION
NUMBER
25 Synchrocheck
27P Phase Undervoltage
27X Auxiliary Undervoltage
32 Sensitive Directional Power
49 Thermal Overload Protection
50BF Breaker Failure
50DD Disturbance Detector
50G Ground Instantaneous Overcurrent
50N Neutral Instantaneous Overcurrent
50N BF Neutral Instantaneous Overcurrent,
Breaker Failure
GE Multilin
DEVICE
NUMBER
50P
51G
51N
51P
52
59N
59P
59X
79
C60 Breaker Protection System

2.1 INTRODUCTION

FUNCTION
Phase Instantaneous Overcurrent
Ground Time Overcurrent
Neutral Time Overcurrent
Phase Time Overcurrent
AC Circuit Breaker
Neutral Overvoltage
Phase Overvoltage
Auxiliary Overvoltage
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2.1.1 OVERVIEW

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