Atec Megger-DDA-6000 - Manual (Page 3)

DDA-3000 and DDA-6000
Universal Circuit Breaker Test Sets
1. When testing a circuit breaker or a device which has no
auxiliary contact to monitor (e.g., a single-pole circuit
breaker), the timer starts when the output current starts to
flow and stops when the output current is interrupted.
2. When testing a device and monitoring normally closed
contacts, the timer starts when the output current starts to
flow and stops when the contacts open.
3. When testing a device and monitoring normally open
contacts, the timer starts when the output current starts to
flow and stops when the contacts close.
Digital voltmeter: Model DDA-1 can be used to measure
the input voltage to the test set or the output voltage from
the test set. It also can be used as a diagnostic tool to
evaluate contact condition by measuring the voltage drop
across breaker contacts while subject to high current.
Panel indicators: Panel lamps incorporated for operator
safety and convenience, indicate:
1. Output of the set ENERGIZED
2. Thermal WARNING or SHUTDOWN
3. GROUND INTERLOCK open
4. OVER RANGE of ammeter
External initiate circuit: Allows initiation of the test set
from a remote location when desired.
SPECIFICATIONS
Input
Because Model DDA-3000/-6000 is used all over the world to test
low-voltage circuit breakers, there are a number of test sets
designed to contend with the many different input voltages and
frequencies.
When ordering, select the test set which best suits the power
system available. The standard input power requirements for the
DDA-3000 and DDA-6000 series are as follows:
Output
Output Circuit: The output of the test set is easily adjustable from
zero to the maximum current available through the impedance of
the device under test. Two output ranges are provided to
accommodate a variety of load circuit impedances.
For high impedance devices, the output can be connected in
series (with the series bar provided) to double the output voltage
at a reduced maximum current.
The maximum current available from the test set is determined
primarily by the impedance of the load circuit.
The duration of the available current is determined primarily by
thermal conditions within the test set.
Output Connections: To provide maximum utilization of the
output available from the test set, each set is equipped with a
Megger stab adapter board and stab sets Model CBS-1 and Model
CBS-2 for use with drawout style, metal-clad breakers. The stabs
eliminate the significant losses that occur if leads are used to
connect the breaker under test to the test set. Cables must be
used when testing molded-case breakers or other devices which
will not connect directly to the stabs.
Duty Cycle: The test set will supply the rated continuous current
indicated for 30 minutes, followed by 30 minutes off.
Maximum Output Current: Model DDA-3000/-6000 Series will
produce the following outputs at rated input voltage:
Instrumentation
Digital Ammeter
Operating Mode
Memory
Continuous
Digital Display: 5-digit display with 0.281 in. (7 mm) numerals
Ranges: 200/2000/20,000/200,000 A
Overall Ammeter System Accuracy
Continuous ±1% of reading
Peak Pulse ±2% of reading
RMS Pulse ±1.5% of reading
Digital Timer
Digital Display: 5-digit display with 0.281 in. (7 mm) numerals
Ranges
0.0001 to 99999 seconds
0.0001 to 99999 cycles
Accuracy: ±1% of reading
Digital Voltmeter
Operating Mode
Input voltage
Output voltage
External voltage
Digital Display: 5-digit display with 0.281 in. (7 mm) numerals
Ranges: 0 to 600 V
Accuracy: ±1% of reading
The DDA Series offers high
capacity in a single, relatively
compact enclosure that can be
easily maneuvered.
Model
No.
Output Current
DDA-3000 4500 A
4446 A
35,000 A
28,000 A
60,000 A
48,000 A
Maximum
Continuous
Current
Maximum Current
Through a
Circuit Breaker
Maximum Current
Through a Short
Circuit
DDA-3001
DDA-3002 4446 A
6250 A
28,000 A
60,000 A
48,000 A
100,000 A DDA-6000
DDA-6001 6175 A
6175 A
50,000 A
50,000 A
80,000 A
80,000 A DDA-6002
Model
No.
Input Voltage
(single-phase)
Input
Frequency
Input
Current
DDA-3000 460 V ± 5%
380 V ± 5%
60 Hz
50 Hz
200 A
200 A DDA-3001
DDA-3002 415 V ± 5%
460 V ± 5%
50 Hz
60 Hz
200 A
350 A DDA-6000
DDA-6001 380 V ± 5%
415 V ± 5%
50 Hz
50 Hz
350 A
350 A DDA-6002
Model
No.
WEIGHT
DDA-3000 Series 1000
1200
46 X 46 X 28 in.
46 X 55 X 28 in.
117 X 117 X 71 cm
DIMENSIONS
454
545
lb H X W X D (in.) H X W X D (cm) kg
117 X 140 X 71 cm DDA-6000 Series