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2 / 14
•
Remove all unused probe heads and measuring
tips, test leads, and accessories.
•
Always first connect the Power Analyser CASSY
to the mains socket before connecting it to the test
setup.
•
Do not touch voltages > 25 V AC, effective, or
60 V DC.
•
Use potential equalisation only for grounding the
Power Analyser CASSY. Make sure that no volt-
age is present here.
•
The voltages to be measured must not exceed the
maximum value of 1000 V DC and 700 V AC, and
the currents must not exceed the maximum value
of the current of 16 A AC and 16 A DC, continu-
ous, or pulses of 24 A.
•
The voltages used must not exceed the specified
rated data of the probe heads and measuring tips,
test leads, and accessories.
•
When measuring, only use the correct measure-
ment category (CAT), voltage and current-tested
test leads and adapters.
•
Never exceed the rated values of the measure-
ment category (CAT) for the lowest rated individual
component of a product, test lead, or accessory.
•
Follow the local and national safety regulations.
•
Use personal protective equipment (approved rub-
ber gloves, face shield, and flame-retardant cloth-
ing) to prevent electric shock and burn injury in
case dangerous live electrical conductors are ex-
posed.
•
Do not work with the device if the covers are re-
moved or the case is open. You might make con-
tact with dangerous voltages.
•
Do not use bare metal BNC or banana plugs.
•
Never insert any metal objects into the connectors.
Rated voltage of power supply systems
Three-phase
Three-phase
Three-phase
3-conductor systems
3-conductor systems
4-conductor systems
phase grounded
ungrounded
with grounded
neutral conductor
L1/ P1
L1/P1
L2/ P2
N/ N
L2/P2
L3/P3
L3/P3
PE/E
PE/ E
V
V
V
66 / 115
66
120 / 208
110, 115
127 / 220
120, 127
220 / 380
220, 230, 240
230 / 400
260, 277, 347
240 / 415
380, 400, 415
260 / 440
440, 480
277 / 480
500
347 / 600
380 / 660
577
400 / 690
600
417 / 720
480 / 830
660, 690
720, 830
1000
Voltages and types of mains for CAT.
Fig. 1:
V oltage conductor
Single-phase
Single-phase
2-conductor
3-conductor
to neutral conductor,
system, AC or DC
system, AC or DC
taken from rated AC
voltage
voltage
grounded
voltage or rated DC
voltage up to
and including
L1/P1
L1/P1
L1/P1
N/N
L2/P2
L2/P2
L2/P2
L3/P3
PE/ E
PE/E
PE/E
V
V
12,5 bis 48
30 / 60
100
60
100 / 200
110, 115
110 / 220
120, 127
115 / 230
120 / 240
200
220
220 / 440
230
240 / 480
240
480
480 / 966
1000
Tel: +49-2233-604-0 · Fax: +49-2233-604-222 · Email: info@ld-didactic.de · Technical alterations reserved
2 Description
Power Analyser CASSY and the Power Analyser CASSY Plus
are measuring devices for use in experiments in electrical en-
gineering, in the areas of drive technology, power electronics,
electrical machines, and power engineering.
Measurements are performed in 4 isolated channels, according
to CAT III 300. The channels are marked by the letters A, B,
C, and D. They can each measure the current or the voltage,
or current and voltage at the same time.
2.1 Voltage and current U, I
•
Instantaneous values: U, I
•
Mean values: U
•
RMS values (AC+DC): U
•
RMS values (AC): U
The measuring methods can freely choose for all channels.
2.2 Phase shift 1
The phase shift φ(channel), indicates the angle between the
effective power and the apparent power of the fundamental
wave. This function is only active if voltage and current are se-
lected and the measurement method is set to RMS value.
2.3 Active power
Measures the effective power. This function is only active if
voltage and current is selected.
2.4 Frequency
Frequency of the voltage for waveforms that pass through the
zero axis. This frequency measurement is suitable for measur-
ing the mains frequency in energy grids.
2.5 Phase shift 2
The phase shift φ (channel A / channel X), measures the angle
between channel A and the selected channel, e.g., φ
3 Technical Specifications
Graphic display:
V
50
Operation:
100
150
Inputs:
300
Input A-D :
Output U-X:
600
Output Y:
Sockets for U and I: 4-mm safety sockets
Voltage ranges U: 25.0/70/250/700 V
1000
Current ranges I:
Sampling rate:
© by LD DIDACTIC GmbH · Leyboldstraße 1 · D-50354 Hürth · www.ld-didactic.com
Instruction sheet 721 100
, I
AV
AV
, I
TRMS
TRMS
, I
TRMSAC
TRMSAC
9 cm (3,5"), QVGA, colour, high
brightness (adjustable up to 400 cd/m
Push-button and rotary selector with
push-button
4 isolated measuring channels, each with
U and I measurement (max. 8 usable
simultaneously)
U and I connection
Voltage outputs ±10 V, 200 mA (only for
727 110)
Voltage output as function generator,
0.01 Hz to 20,000 Hz (only for 727 110)
RMS
±36/±100/±360/±1000 V
AV
0.7/1.6/7/16 A
RMS
±1/±2.4/±10/±16 A
AV
Max. 1,000,000 values/s per channel,
for U and I, max. 500,000 values/s
, φ
.
AA
AB
2
)
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