Atec Megger-DDA-1600 - Manual

DDA-1600
Circuit Breaker Test Set
■
Model DDA-1 Digital Data Acquisition
Instrumentation and Control System
■
Variable pulse time and firing-angle
output current control
■
Tests wide range of breakers
■ Modular, portable design
■
Compliant with NEMA AB-4 test
guidelines
DDA-1600
Circuit Breaker Test Set
DESCRIPTION
The Model DDA-1600 Circuit Breaker Test Set incorporates
proven transformer design with the latest development in
high-current instrumentation and control. This new design
means the DDA-1600 is fully compliant with NEMA AB-4
test guidelines.
This combination provides the user with a portable,
economical, high-current source for primary injection
testing.
Model DDA-1600 provides all the controls, instrumentation
and output capabilities to test low-voltage circuit breakers
in a three-module configuration.
Module 1 – Controller and instrumentation module
contains all the control circuitry and instrumentation
needed for manually testing low-voltage circuit breakers.
Module 2 – Power module contains the coarse and fine-
current controls, along with the SCR initiate package.
Module 3 – Output module contains the high-current
output transformer and the current sensors.
Model DDA-1600 comes complete with all interconnect
cables. Each module is housed in its own rugged, compact
enclosure. The test set is easily transported and may be
connected to the test device by cables or stab assemblies.
APPLICATIONS
Ideally suited for industrial, utility and testing service
company use, Model DDA-1600 is designed to maintain
and test low-voltage power circuit breakers rated to 1600-
ampere frame size.
In addition, it can be used for verifying the ratio of current
transformers and testing thermal or magnetic motor
overload relays.
In the series configuration, the higher voltage output of
Model DDA-1600 permits ready use in substations for
primary injection testing of high-voltage circuit breakers
and protective relays.
FEATURES AND BENEFITS
Model DDA-1600
■ Portable: Housed in a lightweight, rugged, three-piece
chassis that can be carried. This reduces the need for
heavy equipment to transport the test set.
■ Versatile: Designed to test a wide range of air frame and
molded-case circuit breakers. Model DDA-1600 will test
airframe circuit breakers rated up to 1600 amperes and
molded-case circuit breakers rated up to 1200 amperes.
■ Initiating control circuit: Fully digital initiating
control circuit provides both pulsed and maintained
control modes of output duration.
The pulsed mode automatically pulses the output to any
programmed pulse duration. This provides additional
testing capabilities for electromechanical and solid-state
trip devices. A short pulse duration also limits the
preheating of the breaker under test while setting the
test current.
In the maintained mode, the output remains energized
until the device under test operates, which both stops
the timer and de-energizes the output.