Amplifier Units
CMA 156: 6 Phase Current Amplifier (6 x 25 A)
VEHV1010
CMA 156 amplifier units can be used in combination with any CMC test set or in conjunction
with digital real time power system network simulators. The outputs are galvanically separated
from the inputs as well as from ground and are used independently or in addition to those
of the CMC test sets.
The CMA 156 contains six independent current channels, arranged in two isolated groups
(A, B). The outputs can be configured in various ways (connected in parallel, in series, etc.).
For example, by using four CMA 156 units, 3 x 200 A can be generated. The connection to a
CMC test set is made by a control cable at the back of the units.
Used for tests requiring more current channels than provided by the CMC test sets.
Amplifiers, general
Input impedance > 40 kW
Galvanic isolation Input/Output 1.5 kVDC
Galvanic isolation amplifier groups 1.5 kVDC
Connection
4 mm (0.16 in) banana sockets /
combination socket
Amplifiers, if controlled by a CMC
Frequency
range sine signals 10 ... 1000 Hz
range transient signals DC ... 3.1 kHz
accuracy/-drift ±0.5 ppm / ±1 ppm
resolution 5 µHz
Phase
angle range - 360° ... +360°
resolution 0.001°
error at 50/60 Hz < 0.02° typ., < 0.1° guar.
Output current resolution 1 mA
Power supply
Nominal input voltage 110 – 240 VAC, 1-phase
Permissible input voltage 99 ... 264 VAC
Nominal frequency 50/60 Hz
Permissible frequency range 45 ... 65 Hz
Power consumption < 1000 VA
Connection Standard AC socket (IEC 60320)
Environmental conditions
Operation temperature 0 ... +50 °C (+32 ... +122 °F)
Storage temperature -25 ... +70 °C (-13 ... +158 °F)
Humidity range
Relative humidity 5 ... 95 %,
non-condensing
Vibration
IEC 60068-2-6 (20 m/s
2
at 10 ... 150 Hz)
Shock IEC 60068-2-27 (15 g/11ms half-sine)
EMC
Emission
Immunity
Directive 2004/108/EC (CE conform)
EN 61326-1, EN61000-6-4, EN61000-3-2/3
FCC Subpart B of Part 15 Class A
EN 61326-1, EN61000-6-2,
EN 61000-4-2/3/4/5/6/11
Safety Directive 2006/95/EC (CE conform)
EN 61010-1, EN 60950-1, UL 61010-1,
CAN/CSA-C22.2 No 61010-1-04
Miscellaneous
Weight 15.4 kg (34.0 lbs)
Dimensions
(W x H x D, without handle)
450 x 145 x 390 mm
(17.7 x 5.7 x 15.4 in)
Certifications TÜV-GS
Current amplifiers
2
Setting range
6-phase AC (L-N) 6 x 0 ... 25 A
3-phase AC (L-N) 3 x 0 ... 50 A (Group A II B)
1-phase AC (L-N) 1 x 0 ... 150 A
(Group A II B)
DC (L-N)
2 x 0 ... ±25 A
1 x 0 ... ±50 A
Power
6-phase AC (L-N) 6 x 70 VA at 7.5 A
3-phase AC (L-N) 3 x 140 VA at 15 A (Group A II B)
1-phase AC (3L-N)
1 x 420 VA at 22.5 A
1 x 420 VA at 45 A (Group A II B)
1-phase AC (L-L) 1 x 280 VA at 7.5 A
DC (L-N)
2 x 140 W at ±10.5 A
1 x 280 W at ±21 A (Group A II B)
3/6 phase operation
6-phase AC (L-N)
160
Output current / A
120
80
40
0
0
10
20
30
40
50
3-phase AC (A II B)
Output power / VA
per phase
single phase operation
Output current / A
0
25
A(L-L) and
B(L-L) in
series
50 75 100 125 150
400
300
200
100
A(3L-N) and
B(3L-N) in series
A(3L-N) and B(3L-N)
in parallel
0
Output power / VA
Accuracy error < 0.03 % typ., < 0.1 % guar.
Distortion (THD+N)
3
< 0.1 % typ., < 0.3 % guar.
Bandwidth (-3dB) > 8 kHz
Phase lag at 50/60 Hz 1.07°/1.28°
Input voltage 0 ... 5 V
Amplification 5 A / V
Max. compliance voltage (L-N)/(L-L) 15 Vpk / 60 Vpk
1
Guaranteed values valid over one year within 23 °C ±5 °C (73 °F ±10 °F), in the
frequency range of 10 ... 100 Hz at nominal value. Specifications for three-phase
systems under symmetrical conditions (0°, 120°, 240°).
2
For higher current/power requirements: CMA units can be switched in parallel
3
THD+N: Values at 50/60 Hz with 20 kHz bandwidth
Technical Data
1
(22 pages)
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