Removable Inserts
Removable inserts are included with the control design for
customization of specific protection requirements. Inserts
are available for the status indicator LEDs, the operator
panel function keys, and the analysis keys. The removable
inserts are designed for use without adhesives, labelmakers,
or temporary labels. Refer to Using Removable Inserts
for more information.
An electronic label template is included on the ProView
application software CD and can be accessed through the
following default address: C: \ Program Files \ Cooper \
ProviewXX\ Form 6 \ Form 6 Inserts.doc
Idea Workbench
The Idea Workbench provides access to various inputs,
intermediate variables, and internal Form 6 alarms, status,
and targets to allow user-customization of the Form 6
recloser control to meet specific and unique applications.
The Idea Workbench also gives the user the ability to
perform logical functions with these variables by using a
simple graphical user interface. Use of the Idea Workbench
is not a requirement for operation.
Refer to Service Information S280-70-4 (ProView 4.X.X) or
S280-70-21 (ProView 5.X.X) Form 6 Microprocessor-
Based Recloser Control Programming Guide for additional
Idea Workbench information.
Over/Underfrequency Protection
The control includes two-stage operation for both under-
frequency and overfrequency protection. A fixed time delay
ranging from 0 to 100 seconds in .001 second increments
is available for both over and underfrequency. A frequency
restoration function, enabled or disabled by the user, is
provided to allow the recloser to automatically close should
frequency return to within configured settings for a user-
settable time. Over/Underfrequency Protection is included
as part of each protection profile.
Over/Undervoltage Protection
The control includes single-phase and three-phase under
voltage tripping. The control also includes three-phase
overvoltage tripping. Both over and undervoltage functions
include a single-phase and three-phase pick-up setting; a
single-phase and three-phase time delay setting ranging
from 0 to 100 seconds.
Directional
Directional functionality is included to maintain system
coordination from multiple sources, as well as circuit
reconfiguration for each profile. Directional applies to
phase, ground, and negative sequence protection, selected
independently. A maximum torque angle has a range of 0
- 90 degrees.
Fault Location
The control includes an impedance-based fault locator
based upon the Takagi algorithm
1
. Load-compensated
impedance calculation is used for calculating the distance.
Positive and zero sequence is configured in ohms, and the
fault locator line length is configured in kilometers/miles.
1
T. Takagi, Y. Yamakoshi, J. Baba, K. Uemura, T. Sakaguchi, "A New
Algorithm of an Accurate Fault Location for EHV/UHV Transmission Lines:
Part I - Fourier Transformation Method", IEEE Trans. on PAS, Vol.
PAS-100, No. 3, March 1981, pp 1316-1323.
Sync Check
Sync Check is a permissive system used to qualify any
close signal to the mechanism when enabled via the sync
check settings. Sync check allows for closing for any
combination of dead/live bus/line, and to perform
anticipatory closing for a live bus/live line condition by
calculating slip and anticipating the mechanism closing
delay. In addition to the anticipatory close calculation, the
sync check system performs verification of line and bus
voltage magnitudes and frequencies to determine that they
are within pre-determined ranges, and that the angular
difference between the two systems is also within the pre-
determined range. For a live/live close, where there is no
slip between the systems, the sync check system allows
permissive closing after the two systems are within
frequency and voltage limits, and the angular difference
between the systems has been within the allowable limits
for a pre-determined time.
Sync Check functionality includes the following applications:
Hot Line/Hot Bus Closing; Dead Line/Hot Bus Closing; Hot
Line/Dead Bus Closing; and Dead Line/Dead Bus
Closing.
Sync Check Parameters include the following configurable
settings: Voltage Angle; Mechanism Operating Delay;
Static Angle Delay; Dead Threshold; Live Threshold;
Positive Sequence Dead Threshold; Upper Voltage Limit;
Lower Voltage Limit; Lower Frequency Limit; Upper
Frequency Limit; and Fail to Close Timer.
Data Profiler
A fully-configurable data profiler is available which allows
the user to collect information by sampling data at
selectable intervals. These time-stamped values can then
be viewed to determine weekly load profiles, daily harmonic
disturbances or hourly voltage fluctuations. The number of
days of information the data profiler can provide depends
upon configuration parameters.
Refer to Service Information S280-70-4 (ProView 4.X.X) or
S280-70-21 (ProView 5.X.X) Form 6 Microprocessor-
Based Recloser Control Programming Guide for additional
Idea Workbench information.
Manual Close Delay
Manual Close Delay provides a delay from the time that the
manual CLOSE button is pushed to the time the manual
close operation is performed.
The delay is programmable from 0 to 60 seconds in 1
second increments. A programmed delay value can be
overridden for immediate closing by pressing the CLOSE
button a second time.
An active Manual Close Delay can be canceled by pressing
the TRIP/LOCKOUT button.
The default setting has the feature disabled (0 seconds). A
countdown on the front panel LCD screen indicates Manual
Close Delay is active.
S280-70-3
13
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