Date Code 20170814
Instruction Manual
SEL-700G Relay
Section 4
Protection and Logic Functions
Instruction Manual
Overview
This section describes the SEL-700G Relay settings, including the protection
elements and basic functions, control I/O logic, as well as the settings that
control the communications ports and front-panel displays. Depending on the
relay model number, some of the settings do not apply. Refer to Table 1.1 and
Table 1.2 in Section 1: Introduction and Specifications for the applicable
features in various relay models.
This section includes the following:
Lists information that you need to know about the protected
equipment before you calculate the relay settings.
Lists the settings that configure the relay
inputs to accurately measure and interpret the ac current and voltage
input signals.
Lists the settings for the following elements available
in SEL-700G0, SEL-700G1, and SEL-700GT relays for generator
protection and abnormal operating conditions. See Intertie and Feeder
Protection for additional generator protection elements that are also
applicable to intertie protection.
➤
Phase Differential Element and Ground Differential Element
➤
Restricted Earth Fault Element
➤
100% Stator Ground Protection Elements
➤
Zero-Sequence Voltage-Polarized Directional Element With IN
as Operate Quantity (67N)
➤
Field Ground Protection Elements
➤
System Backup Protection: Distance, Voltage Controlled/
Restraint OC Elements
➤
➤
➤
➤
➤
➤
➤
NOTE:
Each SEL-700G is shipped
with default factory settings. Calculate
the settings for your application to
ensure secure and dependable
protection. Document and enter the
settings (see Section 6: Settings).
Summary of Contents for SEL-700G Series
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