DAPPER is an integrated set of modules for Three-Phase Power System Design and Analysis including rigorous load flow and voltage drop calculations, impact motor starting, traditional fault analysis, demand and design load analysis, feeder, raceway and transformer sizing, and panel, MCC, and switchboard schedule specification.

Benefits:

• Generate better designs by comparing alternatives quickly
• Improve accuracy with DAPPER’s rigorous solution methods
• Save time by sharing a common project database and interface
• Improve consistency with standard design libraries
• Design safer systems by comparing calculations with short circuit and continuous ratings
• Communicate designs effectively with presentation quality graphics, reports, and equipment schedules

LOAD FLOW/VOLTAGE DROP:
With DAPPER, users can calculate the voltage drop on each feeder and transformer branch, voltage on each bus, projected power flow, and losses in the power system.

This program may be used for conventional voltage drop analysis, loss analysis, power factor studies, capacitor placement, long-line charging effects, impact loading for motor starting studies, generator sizing, and for cogeneration analysis.

With DAPPER, a single load flow program models loop and radial power systems. Double precision sparse matrix current injection solutions are used for faster, more accurate convergence. This allows for better modeling of ill-conditioned systems.

COMPREHENSIVE FAULT ANALYSIS:
The DAPPER Comprehensive Fault Analysis program provides a network solution of three-phase, single-line to ground, line-to line, and double line to ground fault currents; RMS momentary fault currents; asymmetrical fault duties at three, five, and eight cycles; the positive, negative, and zero sequence impedance values between each fault location, and contributions from utilities, generators, and motors. At each fault location, the direction, X/R, and magnitude of fault currents are reported, thus providing a clear view of the conditions that exist during the fault.

FEEDER AND TRANSFORMER SIZING:
DAPPER will size feeder cables, ground wires, raceways, bus ducts, duct banks and transformers throughout the power system to the load requirements calculated by the Demand Load Analysis program.

Feeders are selected to meet user-defined criteria for conductor material, voltage level, insulation type, and environmental conditions. Transformer primary and secondary feeders are sized to the transformer full load as specified by the user. Feeders and transformers may be included, excluded or evaluated in the sizing study.

LOAD SCHEDULES:
The DAPPER Load Schedule module provides detailed documentation of load fed through Panels, Motor Control Centers (MCCs) and Switchboards. Input is simplified through the use of libraries and copy and paste functions. The schedules can be displayed, printed, and exported in a variety of different formats.