The example mask for reclose cancel stops reclosing for a timeout of the Zone 3 distance
elements (Z3T), or 51NT residual time-overcurrent trips.
Relay Word Bits Intended for Relay Testing
Each bit in the Relay Word has a designated purpose. The following bits are included to
assist in relay testing: 3P21, 32Q, 51NP, 50NG, 50P, 27S, 27P, 59S, 59P. This does not
exclude the use of these bits in one of four trip or programmable output contacts if required
by your application.
Note:
Each mask must be properly configured for your application.
RECLOSING RELAY OPERATION EXAMPLES
Overview
The SEL-221F relay includes several voltage supervised reclosing schemes and one unsuper-
vised scheme. The following timing diagrams and text explain how each reclosing scheme
operates successfully. Also, there is one example of a cancelled reclosing shot. Section 2:
SPECIFICATIONS provides detailed reclosing logic descriptions.
The table below outlines the reclosing examples in this section.
Table 5.2: Reclosing Relay Timing Examples
Example 1:
Single Shot Unsupervised Reclose Sequence
Example 2:
Reclosing Cancelled Due to RC Assertion
Example 3:
Live-Bus/Dead-line Supervised Reclose
Example 4:
Sync-check Supervised Reclose
Examples 1 and 2 provide information on the basic reclosing function. The remaining
examples describe the reclosing options in greater detail. Timing diagrams, example settings,
and an explanation of the events are provided in each example.
In each of the cases, the 79RS timer starts when the 52A input asserts. If the 79RS timer
expires before the next trip, the relay resets the recloser and the available shot is reenabled.
Refer to Section 2: SPECIFICATIONS, 79RS Timer for more details.
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Applications
SEL-221F, -1 Instruction Manual
Date Code 930601
Summary of Contents for SEL-221F
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Page 158: ...SETTINGS SHEET FOR SEL 221F RELAY PAGE 2 OF 6 DATE Date Code 921110 ...
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Page 161: ...SETTINGS SHEET PAGE 5 OF 6 FOR SEL 221F RELAY DATE Date Code 961208 ...
Page 229: ...SEL 200 Series Relay Main Board Troubleshooting Test Points and Jumper Locations ...