Siemens 7SA511 manual Relay Setting Descriptions by Address Block, LCD Text

7SA511 Line Protection Relay Chapter 2

choice of the data transmission rate for the front port. The operating settings also identify what information is to be displayed in each of the two lines of the LCD for operational messages and for fault messages.

The relay’s “Scope of Functions” settings are also considered part of the operating settings. These settings indicate which functions are activated (EXIST) and deactivated (NON-EXIST). Operating settings also indicate how the optional functions automatic

￿reclose and parameter changeover will operate.

System settings identify the protected power system and switchgear. Information such as the system starpoint direction and condition, voltage transformer voltages, and current transformer rated current is required. The relay’s distance protection and ground fault protection functions use this information to compute the system’s protection requirements. When the parameter changeover feature is available (see section 2.5.3), system settings can vary between the parameter sets.

Protection settings such as for distance protection, pilot protection, and overcurrent protection, specify the values that are used to identify fault conditions and are the majority of settings the 7SA511 relay requires. Depending on your relay model (see section 1.3.3), you may also need to indicate settings for power swing blocking protection or high- resistance ground fault protection. When the parameter changeover feature is available

￿(see section 2.5.3), protection settings can vary between the parameter sets.

Relay configuration settings tell the relay how to process the input information and logically associate it with the output devices. If desired, you can reassign the binary inputs, annunciations, and the function of the relay’s output signals, trip relays, and LEDs. Configuration is also referred to in this manual as programming or marshalling the relay.

2.3.1 Relay Setting Descriptions (by Address Block)

Each relay input and output setting is assigned to a four-digit address number that you must access to display or change the setting. Address numbers are typically grouped in blocks according to their function. Table 2-1 describes all of the primary address blocks used in this relay. Your relay’s configuration determines which addresses you will be able to access.

Table 2-1.7SA511 Relay Primary Address Blocks.

Address

1000

1100

1200

1300

LCD Text

PARAMETERS

POWER

SYSTEM DATA

DIST. PROT.

GENERAL SETTINGS

DIST. PROT.

INDEPEND. ZONES

Description

Program the protected system settings such as the system starpoint condition, voltage transformer data, and current transformer data. Also set the parameters for general line data.

Indicate whether distance protection is on or off, program the direction of the distance protection directional elements, and set the trip delays for the fault detection zones (T4 or T5).

Set the parameters for independent distance zones.

Zone Z1	delay T1
Zone Z2	delay T2
Zone Z3	delay T3

July 27, 1995 2-5