Machine Test CASSY 0.3

 The Machine Test CASSY is part of the machine test system for the analysis of electrical drives and the simulation of machine loads. Its compact size allows it to be used in an experiment demonstration panel rack or as a table top unit.

The Machine Test CASSY differs from its previous model in that it has an additional LAN connection. 

In addition to the control unit for the Electrical Dynamometer (773 2991), it has a powerful measurement and analysis system with four isolated and potential-free measurement channels. Each of those, each for simultaneous measurement of current and voltage, comparable to the Power Analyser CASSY (727 101).

• The speed measurement is carried out via an optical sensor and gives an angular resolution of 0.1 °.
• The torque is measured up to ±10 Nm with a resolution of 1x10^-3 Nm. This can then also be calibrated with a reference weight of 1 kg.

The machine test CASSY can be used for the following experiments, as well as others:

• Analysis of machines as a motor and as a generator
• Behaviour to different load cases, e.g. flywheel mass, blower etc.
• Behaviour of time variable load cases
• Study of frequency converter with asynchronous machine, IMP machines
• Starting induction machines and slip ring rotors with star-delta connection, soft starter and frequency converter,

The Machine Test CASSY differs from its previous model in that it has an additional LAN connection.

Machine selection:

It is possible to comprehensively parametrize all available machines. This parametrization is supported by intelligent menu guidance. Due to integrated recognition of machine types of new design this selection is eased.

Furthermore, machines from the existing inventory can also be integrated and individually parametrized. A switch-over of the safety loop between LD machines and e.g. machines of the brand "ELWE Technik" is easily possible.

The menu "Freely parametrizable" additionally allows the manual input of parameters of older machines, third-party machines or special machines e.g. for research purposes. Please contact our technical consultants.

Operating mode:

Testing of motors

The control during the testing of motors is either done by the measured speed or with the help of the measured torque.

• Speed control: Manual, Automatic, Run-up characteristic, Load characteristic
• Torque control: Manual, automatic dynamic unloading, automatic dynamic loading, automatic static according to IEC 60034-2-1 in 6 steps and additionally in 16 steps from 0 % to 150 %

Testing of generators

Electrical machines can be tested, monitored and analysed by the system as a generator in isolated operation - but also in mains operation.

Load simulation

Depending on the speed for start-up and operating behaviour.

• Load characteristic: T(n) (extruder)
• Load characteristic: T(n²) (turbomachine e.g. fan)
• Load characteristic: TL = const. (elevator, crane)
• Load characteristic: P const. (lathe, milling machine spindle)
• Load characteristic: T(α) Flywheel mass
• Load characteristic: Sum of load function

Time-dependent load

•  Sine function , Trapezoid function , Delta function: 
• Free functions, specified via external software, e.g: CASSY Lab 2 for Drives and Power Systems 524 222,

Generator control

Isolated operation

• Power control with Voltage droop
• Voltage control with power droop

Mains operation

• Frequency-power control with droop
• Voltage-reactive power control with droop
• Parallel operation of generators

Mechanical analyses on machines

Moment of inertia

• Determining the moment of inertia
• Mechanical losses

Additional information:

• Mains voltage: 230 V 50–60 Hz
• Connected load: 1600 VA
• Temperature controlled active ventilation
• Dimensions: 500 mm x 300 mm x 180 mm
• Mass: 10 kg