Application example
750/760 Quick Reference Guide
33
Figure 16: Actual values display
APPLICATION EXAMPLE
Description
The 750 and 760 relays contain many features designed to accommodate a wide range of
applications. This chapter is provided to guide you, the first time user, through a real-world
application. The following step-by-step installation example, provides you with a quick and
convenient way of becoming familiar with the relay.
The following example is only one of many possible applications of the 750/760 relay.
Important points to keep in mind before developing settings for any multifunction
numerical relay like the 750/760 are as follows:
•
Gather system data, including, but not limited to:
– CT primary and secondary ratings for all CTs used to feed the relay
– VT primary and secondary ratings for both the bus and line VTs
– System frequency
– System phase sequence
•
Define the protection elements that will be enabled. Prepare a list of protection
functions including the following information. By default, all the protection functions
must be assumed Disabled:
– pickup parameter
– operating curve (if applicable)
– time dial or multiplier
Summary of Contents for 750
Page 2: ......
Page 39: ...Application example 750 760 Quick Reference Guide 35 Figure 17 Typical three line diagram...
Page 41: ...Application example 750 760 Quick Reference Guide 37 Figure 19 Typical control diagram...
Page 42: ...Application example 38 750 760 Quick Reference Guide Figure 20 Typical breaker control diagram...
Page 43: ...Application example 750 760 Quick Reference Guide 39 Figure 21 Typical relay control diagram...
