Siemens 7SA511 manual Relay Features, Relay Setting Types

7SA511 Line Protection RelayProduct Description

2.2	Relay Features
	Microprocessor-Based Technology	Close-Onto-Fault Protection
	Fully Numerical Design	Isolated Ground Fault Detection
	Five Distance Zones, Phase and Ground	Directional High Resistance Ground
	Polygonal Impedance Characteristic	Fault Protection
	Selectable Forward, Reverse or	Nonvolatile Memory for Settings and
	Nondirectional	Targets
	Separate R-Setting for Phase and	Programmable Binary Inputs, LEDs,
	Ground	Signal and Trip Relays
	Seven Independent Time Delays	Four Independent Setting Groups
	Fault Detector Options	Fault Locating
	Overcurrent	Parallel Line Compensation Option
-	Voltage-Controlled Overcurrent	Fault Target Data
￿	Impedance	Fault Waveform Capture (0.83 ms
	Pilot Logic Schemes	resolution for 60 Hz frequency)
	Permissive Overreach Transfer Trip	Operations Event Log
	(POTT)	Circuit Breaker Operations Counter
	Permissive Underreach Transfer Trip	Accumulated Circuit Breaker
	(PUTT)	Interrupted Current (per pole)
	Blocking	Real-Time Clock
	Unblocking	Circuit Breaker Trip Test Function
	-Directional Comparison	￿Circuit Breaker Reclose Test
	Directional Pilot Wire (requires	Metering Functions (On-line)
	7PA5210)	Voltage
	Weak Feed Echo Keying Logic	Current
	Transient Blocking	Real Power (Watts)
	Zone Extension Scheme	Reactive Power (Vars)
	Reverse Interlock Bus Protection	-Frequency
	Single/Three-Pole Trip	Impedances
	Single/Three-Pole Multi-Shot Reclosing	Two Serial Ports (one standard, one
	Loss of Potential Block	optional)
	Overcurrent Protection as Backup for	IEC 870-5 Communication Standard
￿	Distance Protection	￿Self-Monitoring
	Power Swing Block/Trip	Draw Out Construction

2.3 Relay Setting Types

The relay requires four types of settings. The settings, described below, determine how the relay recognizes and responds to operating conditions to protect your power apparatus equipment. Each relay is delivered with a set of parameters that are preprogrammed at the factory. All of the presettings￿are identified in Chapter 5, “Programming the Relay.”

Operating settings define the conditions under which the relay will function. These include the setting of the real-time clock (time and date), choice of display language, and

2-4 July 27, 1995