GE LPS-O - CALCULATION OF SETTINGS; INTRODUCTION

GE Power Management LPS-O Line Protection System 2-
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2 CALCULATION OF SETTINGS 2.1 INTRODUCTION
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2 CALCULATION OF SETTINGS 2.1 INTRODUCTION 2.1.1 DESCRIPTION
There are a number of settings that must be made in the LPS-O relaying system. These settings are divided
into two categories, with each category divided into the sub-groups shown below:
a) GENERAL SETTINGS
• Configuration
• Communications
• Oscillography
• Equipment Duty
• Programmable Inputs
b) PROTECTION SETTINGS
• Z1DISTANCE
• Z2DISTANCE
• Z3DISTANCE
• Z4DISTANCE
• CURSUPVISN
• OVERCURRNT
•VOLTAGE
•LINEPICKUP
• REMOTEOPEN
•OVERLOAD
•LINE QTY
• OS BLOCKING
• NON-CRITICAL ALARM
• PROGRAMMABLE OUTPUTS
The sub-categories (defined by their mnemonic) are given in the order that they appear when scrolled in the
display provided on the front of the LPS-O system.
Up to four separate and distinct
Protection Settings
Groups can be programmed and stored in the LPS-O
relaying system. Selection of the settings group to be used can be made via the keypad, through the communi-
cations link or through external contacts applied to selected programmable inputs.
The
General Settings
category applies to all schemes and all settings groups regardless of which Settings
Group is selected.
The
General Settings
category will be discussed first, followed by the
Protection Settings
category. Scheme
specific requirements (when applicable to a particular setting) will be discussed when that setting is described.
Blank settings forms are provided on pages 2–47 to 2–54, which may be copied and used to record the set-
tings for any application.