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What's New in PTW V4.5?
V4.5 of PTW has now been released. It has been
sent to all existing users with a current update and maintenance agreement.
New Features: General PTW
-
Import/Export
Function: A datablock-style interface was developed to facilitate importing
and exporting data to and from PTW project files. The Import/Export utility
can be used to integrate PTW with other databases.
-
Energized/De-energised Display: An optional setting to display all
de-energised branches in a different colour on SLDs was added. When breakers
are opened and closed different parts of the system will become energised or
de-energised.
- Dynamic ATS
Symbol: A new Automatic Transfer Switch (ATS) component is available on SLDs.
- Dynamic
Transformer Connection Symbol: Transformer symbols can be configured to
display Delta , Wye, and Wye-Earth connection symbols automatically.
- Parallel
Branches: Implemented support for parallel branches in all study modules.
- Power Factor
Default: Added power factor field to Demand Load Library and function to pass
the default power factor to Loads and Schedule Circuits when load type is
selected.
- User-defined
Defaults: User-defined defaults are now available for all component data. The
defaults are stored in a default project in the Library folder.
- SLD
Enhancement: Improved line routing on SLDs.
- Zoom Previous:
Added icon for zoom previous on SLDs.
- Auto-Scroll:
Expanded hit area of auto-scroll feature on SLDs so it now works when cursor
is anywhere beyond the edge of drawing area.
- Name Tag
Location: New feature to re-set component Name Tag to default position on SLDs
was added. A new feature to re-set the datablock position relative to the name
tag was also added.
- Expanded Group
Print: Expanded Group Print to print an unlimited number of Documents. The
previous limit was 500 documents.
- Regenerative
Drives: Expanded load component allowing negative kW entries to represent
regenerative drives.
- Spreadsheet
Operation: Modified default behaviour of all spreadsheet entry to replace
existing field rather than append to existing field when typing.
- Datablock
Selection: Modified default behaviour of datablock selection so that a
double-click will apply selected datablock rather than edit datablock.
- Datablock
Append: New option to append multiple datablock fields together on a single
line. For example: (1-185mm2, 60m) displays the quantity, size and length on
SLDs.
- Unlink
Library: Added a check box to link or unlink component data with the library.
Breaking the link with the library allows direct access to all component
fields.
- Transformer
FLA: Added display fields for primary and secondary full load amp ratings
calculated automatically from transformer kVA ratings.
New Features: Panel Schedules
- Power Factor
Defaults: Panel loads now read default power factors from load type in demand
load library.
- Sequential
Circuits: Panel now has option to display Alternating (1-3-5) or Sequential
(1-2-3) Circuit numbers.
- Circuit Start
Number: Panel now has option to display circuit numbers starting with a
user-defined number.
New Features: CAPTOR
- New Library
Entries: Over 200 new library entries are included in PTW V4.5 including
devices from: Federal Pioneer, Merlin Gerin, Square D, GE, GEC and Multilin.
- TCC Fault: New
feature that displays coordination based on branch currents for a fault at one
location. Device curves are terminated at the fault current each device sees
for the specified fault location.
- Distance
Report: When the TCC Fault option is used the TCC report includes the fault
current through each device and the associated trip time for each device.
- Auto-Redraw:
Modified interface to automatically redraw TCC curves when a device setting
change is made, eliminating the need to click the redraw button.
- SC Flag:
Modified SC Flag to have the flag height based on a percentage of the Time
Axis rather than a percentage of the lowest time axis value.
- Global Label
Change: New option to globally turn device name labels on and off on each TCC
or for the entire project. When using datablocks on the TCC, it is better to
include the device name in the datablock and turn the standard name labels
off.
- Reports: New
title block selection for report name and improved report pagination options.
- Disassociate:
New option to disassociate SLD from TCC.
- TCC Flags: New
option to display pickup name with short circuit flag in amps. Previously the
pickup and short circuit flags were both displayed in amps or by name.
New Features: Arc
Flash
- IEEE 1584
Standard: New option to follow calculations as described in IEEE Standard 1584
in addition to earlier NFPA 70E-2000 calculations.
- Motor Decay:
New option to remove motor contribution from flash energy calculations after a
user-defined time.
- Energy
Accumulation: Modified calculations to accumulate energy at each bus as branch
contributions trip and when motor contributions are removed. Motors
contributions can now be included, excluded, or included for a user-defined
time.
- Expanded
Search: Expanded search to 5-branches for locating protective devices to
determine trip times.
- Label
Printing: New option to group-print labels to 4-different Avery label sheet
formats (1x1, 1x2, 2x2, 2x3).
- Global
Changes: New option to a selected group of arc flash entries. The global
change is useful for changing working distance, breaker opening time, etc.
- Improved
Defaults: Implemented default values suggested in the IEEE 1584 Standard for
working distances and bus bar gaps based on voltage level and equipment type.
- Unlink: Buses
on the Arc Flash Spreadsheet can be "unlinked" from the study results allowing
you to enter fault currents and trip times manually.
New Features: Equipment Evaluation
- Switch
Library: Added new Switch category in PTW library.
- Bus Rating:
Added option to specify series rating for bus components.
- Multiple
Functions: Evaluation checks were expanded to include all functions defined
for each protective device. Previous versions only checked the first function
defined for each device.
- Marginal
Classification: Added a new classification state of "Marginal" to the
equipment evaluation report. Separate levels can now be specified for Marginal
and Fail.
- Branch
Currents: A new option allows comparison of equipment ratings to ANSI and IEC
branch currents. Previously the ANSI and IEC bus values were always used.
- Study Specific
Use: Fault rating comparisons may be run separately from Continuous rating
comparisons. Previously the Pass/Fail was based on both Fault and Continuous
rating comparisons.
- Input
Evaluation Report: A new report is available listing missing or invalid input
data. The report lists the components that fail the input checks and provides
details about what data are missing or invalid.
New Features: Fault
Analysis
- Branch Arrows:
Added branch arrows for all fault modules
- Datablocks:
Added datablock fields to store branch results for faults at either end of
each branch.
- IEC 60909
Datablocks: Added branch current datablocks for unbalanced fault conditions (SLE,
LL, LLE faults).
- IEC 60909
Summary Report: Removed detailed contribution data from standard IEC 909 fault
report providing a more efficient summary format. The detailed report still
lists detailed individual contribution information.
- IEC 60909 -
2001 Revisions: Updated IEC 60909 fault module to comply with latest standard
revision including:
-Added Kg factor for generators and synchronous motors.
-Changed motor q-factor to use motor kW-input rating instead of kw-output.
-Added modelling of off-nominal voltage and c-factor adjustment for Utility.
-Changed generator excitation selection (series 1, series 2) to be based on '<
1.6' (2.0 for salient pole) instead of '<= 1.6' (2.0 for salient pole). (small
effects to Ik only).
-Removed all induction motor effects from Ik calculation (affects Ik only).
-Modified transformer factor to be applied only to transformer impedance
calculation rather than being applied to the current calculation.
-Fixed problem related to excluding directly fed generators when combined with
parallel groups of generators in Ik calculation (affects Ib and Ik
calculation).
-Modified some internal calculations from scalar to vector addition.
-Added option to calculate Ik using Lambda x Ir method (Eq. 78), or modified
Ib method (Eq. 75 w/o induction motors).
New Features: Reliability
- Switch
Components: Added representation of disconnect switch components in
reliability model.
- Cost Units:
Added cost units to library and project with consistency check.
PTW V4.5 New Optional Study Modules
IEC Standard 61363 Fault Analysis Module
The IEC 61363
standard provides a short circuit calculation procedure intended for use on
independent power systems fed from local generation including ships and
off-shore installations. The methodology is designed to more accurately account
for generator and motor contributions and decay rates than traditional fault
calculations.
DC System Analysis
The DC Analysis
modules include DC Load Flow, DC Short Circuit (ANSI & IEC), and Battery Sizing.
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