With the MTC2 R7, SCHLEICH redefines speed and precision in surge test and partial discharge testing – no other test device offers more performance and versatility.

It utilizes the latest hardware technologies paired with state-of-the-art .NET Core software. This significantly increases the accuracy of individual test methods and measurement speed.

All components are housed in a rugged industrial enclosure manufactured by specialized . The sensitive measurement technology is further protected from shocks and vibrations by shock absorbers inside the enclosure.

No matter how good a test device may be, it must also integrate seamlessly into an existing infrastructure. That’s why the MTC2 R7’s connection panel is discreetly recessed into the side in the standard configuration, making it easily accessible. Whether you’re using the device on a table or standing on the floor, all connections are conveniently accessible at all times.

The workshop housing is based on the Allround case andisadditionallyreinforcedwith solid aluminum plates on the lid and bottom. The sturdy, Flip-up front cover protects the control panel and display from damage during transport. 

The " Accessory bag," which is attached to the top of the device, holds connection cables, terminals, and other Accessories .

As with the standard housing, the sensitive measurement technology within the housing is additionally protected from impacts and vibrations by shock absorbers. Even hard impacts are reliably absorbed by our specialized damping technology.

The " device " in the " workshop housing " also features a built-in LED warning light.

The Flip-up front cover is secured with snap fasteners for transport. It can be quickly and easily removed if necessary.

The Accessory bag provides space for connection cables, terminals, and other Accessories.

For the desktop and 19” rack mount devices, all Connections are located at the rear. This allows the MTC2 R7 to be easily and conveniently integrated into a 19” rack.

For remote control, these device models come standard with an additional PLC I/O interface. In addition, the devicescanbeexpandedwith additional interfaces and fieldbuses.

It's all about the device under test:
The new software has been completely redesigned and is based on modern .NET technology. MTC2 R7 features modern, clear interfaces that enable intuitive operation. To facilitate touch operation while on the go or in the workshop to ensure, many settings can be displayed in a larger format. When used with a large touchscreen keyboard, the software can thus be operated comfortably even without a mouse or keyboard.

The test object database provides a comprehensive overview of each created device under test. In addition to an overview of the individual assigned parameters—such as manufacturer, serial number, and type—all test results are also displayed.

Any number of devices under test/device under test types can be created in the software. Additional information can now be assigned to these:

• Nameplate Information
• Images of the nameplate or the device under test 
• Location Information
• Logbook entries for documenting any information
• Several test plans, e.g.:
  Incoming test
  Outgoing test
  Type testing
• test results

The MTC2 R7’s five test leads allow you to connect to all relevant winding terminals simultaneously. The three phase terminals and the neutral point (if present and accessible) are connected using four test leads. The fourth test connection at the neutral point provides a unique increase in test accuracy. The fifth test connection is connected to the statorelectric motor housing. It is required for the insulation test between the winding and the laminated core .

Do you generally need more than four test connections, e.g., to contact additional sensors or unconnected devices under test? Then an extension of the MTC2 R7 to a total of eight measurement connections + body is possible.

The automatic test method switch-over

After connecting the device under test, the MTC2 R7 automatically tests all five terminals. The integrated test method switching eliminates the need to manually reconfigure the connections. Our test method selection feature ensures a fast and automatic switch between the various test methods. Since the voltage differences between test methods can be very large, the reliability of the switch-over is our top priority. A Resistance test with 3 V is switched to the device under test just as reliably as a high voltage test with 15 kV. No compromises!

For test objects with multiple connections, it is more cost-effective to connect all of the test object’s connections to the test equipment immediately. The test equipment then performs all tests between all connection points fully automatically. This approach reduces the required cycle time and thus the cost of a test, while also preventing errors. The switch-over between the various connections is achieved through flexible switching matrices.

Teilentladungsprüfung bei Stoßspannung

– Optional Extension –

Die Teilentladungsprüfung dient zur Überprüfung der Wicklungsqualität von Wickelgütern. Im Wesentlichen geht es darum, Qualitätsmängel an Wicklungen aufzudecken, die mit der herkömmlichen Hochspannungsprüfung oder auch der Stoßspannungsprüfung alleine nicht erkennbar sind. 

The coupling technology, combined with high-frequency filter technology, makes the system extremely robust against interference. Therefore, it is ideally suited for use in the field or in manufacturing.

The test is performed either manually or fully automatically. In manual mode, the operator increases the voltage while monitoring the partial discharge signal. 

Automatic operation enables the fully automatic analysis of all three phases via a test sequence. The following values are determined per phase: 

• PDIV (Inception Voltage) 
• PDEV (Extinction Voltage)
• RPDIV (Repetitive Inception Voltage) 
• RPDEV (Repetitive Extinction Voltage) 

It is not necessary to run the entire ramp. If it is necessary to quickly distinguish between GO and n.GO during production, the patented 50 Hz high-speed test run can be used as an option. Alternatively, a fixed TEST VOLTAGE can be used.

Insulation Resistance Test

The insulation resistance test integrated into the base unit is designed specialized for testing electric drives. The TEST VOLTAGE is automatically switched to the test lead , which is also used for the surge voltage and Resistance test . It is not necessary to reconfigure the device under test during individual measurements. The switch-over is performed fully automatically up to a TEST VOLTAGE of 50 kV in the tester.

The software offers pre-configured test sequences for PI, DAR, High Voltage DC, MegaOhm, and step voltage. In conjunction with the new fully automatic ramp time determination, operation has been significantly simplified. To optimally configure the test device for specialized applications, all parameters can also be set separately. These include the following functions:

• Separate current limits during the ramp phase and test phase
• contact control Regarding Minimum Current Monitoring
• Temperature compensation of the insulation resistance according to IEEE Std 43

Insulation resistance test with ramp

As a rule, the voltage-current curve ( ramp time ) is defined and set manually, one by one, from device under test to device under test . However, care must be taken to ensure that maximum charging currents are not exceeded. 

Using the automatic charging current detection feature included in the scope of delivery during the initial phase of the ramp function, the MTC2 R7 determines the shortest ramp time.

Of course, it is still possible to configure the ramp function custom . To do so, select the ramp duration and set the maximum allowable charging current as the evaluation criterion.

• Automatic charging current detection for minimal ramp time
• Adjustable ramp and " test time "
• Graphical representation of current, voltage, and insulation resistance in a diagram
• discharge After the test, the results are displayed and recorded

Resistance test

The MTC2 R7 is already equipped with a " Resistance test " in the " base version " configuration. This allows for the testing of phase resistors, temperature sensors (NTCs, PTCs, and KTYs), and individual coils without having to reconnect the test leads. Thanks to the integrated test method selection, testing is performed immediately and fully automatically using the test leads already connected to the " device under test ."

Temperature compensation

• Temperature sensor connection directly to the device
• Connectable sensors:

• • Room temperature sensor
  • Object temperature sensor
  • Pyrometer
  • Hygrometer and barometer

• Three independent input signals, each with 0 – 10 V or 4 – 20 mA
• measurement range 0–100 °C (32–212 °F)
• Reference temperature adjustable
• Fully automatic compensation of resistance values for copper, aluminum, and temperature sensors

Inductance and capacitance test

– Optional add-on for Resistance test –

The use of a capacitance measurement bridge is a thing of the past. Utilize the measurement bridge optionally built-in in the MTC2 R7 for high-precision measurement of inductances, impedances, and Capacitances.

The following evaluation options are available:

• Comparison of the actual value to a specified value set value
• Determination of the symmetry (scattering range) of all three phases

high voltage test AC

– Optional Extension –

The high voltage test AC can be inserted into the MTC2 R7 built-in and is immediately and automatically connected to the test terminals. No reconnection is necessary. The test is performed fully automatically using the test leads already connected to the device under test .

Due to the integration of the high voltage test , this expansion is available only in the 19-inch or desktop version. The device is therefore expanded to 10 HM.

Rotating field test

– Optional Extension –

Using the sense of rotation test , the rotating field of a stator can be measured and evaluated. The test is performed noncontact using a rotating field probe, which is stator or mounted on a test specimen holder.

rotating field s are generated by an electronic source that simulates the three-phase power supply of the electric motor. This test allows wiring errors in the manufacturing process to be detected before the electric motor is assembled.

All test results can be output in the modern standard protocol format either immediately after the test or at a later time. The language of the report can be selected at custom before it is generated. Reporting is performed in accordance with IEC 61934. The default languages are German, English, Chinese, Danish, French, Italian, Dutch, Polish, Portuguese, Swedish, Slovenian, Spanish, Czech, and Hungarian.

Test plans and test results can be stored locally or, alternatively, on a central server. This ensures a high level of data security and optimal data exchange between different test systems.

The MTC2 R7 operates optimally in all network infrastructures even in its standard configuration. This feature provides the ideal platform for collecting, managing, analyzing, and distributing information.

All test object data, test plans, test results , and user information can be efficiently synchronized across multiple test devices. This ensures that every test device anddesktopworkstation is always up to date without the need to transfer data via an additional storage medium.

The workstation software provides you with a comprehensive overview of all test results at any time. Test plans can be easily edited from your office workstation.

Utilize the extensive configuration options to define which data, operator access, and results are designated for which test system and which are not.

The software allows the test device to operate even without a network connection. This ensures continuous testing. This is necessary, for example, in the event of a network failure or for field use.

The VoltageAnalyzer

The VoltageAnalyzer is used to measure surge voltage signals directly at the electric motor winding. The frequency response covers the space from DC up to very high pulse frequencies in the MHzspace range. This makes the VoltageAnalyzer ideal for highly accurate surge voltage and partial discharge measurements. The VoltageAnalyzer measures voltages and voltage spikes directly where they occur. This can be, for example, in electric motor at the motor terminal board or directly at the winding terminals.

Spannungsmessung bei Stoßspannung und Teilentladung

Es kann vorkommen, dass die intern im Stoßspannungsprüfgerät gemessene Spannung nicht genau mit der Spannung am Prüfobjekt übereinstimmt. Dies liegt daran, dass die in Messleitungen unvermeidlichen Leitungsinduktivitäten und Kapazitäten zwischen den Messleitungen den Spannungsverlauf des Stoßsignals auf dem Weg zum Prüfling verändern können. Dies geschieht umso stärker, je steiler der Stoßimpuls ansteigt.

For example, during a partial discharge test, to determine the partial discharge onset voltage actually applied to the E-motor terminal board measurement, a measurement using the VoltageAnalyzer directly at the terminal board is therefore required.

The armature booster

An additional " armature booster " is available for the MTC2 R7 tester for testing armatures. This is required for testing larger, low-inductance DC armatures. The " armature booster " increases the surge current by a factor of 10 to detect short circuits and insulation faults between the laminations.

The armature booster is connected to the test leads of the MTC2 R7. Two sturdy test probes are available for the operator at the output of the booster. In addition, a built-in warning light indicates whether the terminals are de-energized. An audible signal indicates whether the test is GO or n.GO .

All Facts at a Glance

Prüfgeräte mit 6, 12, 15, 30, 40 und 50 kV Stoßspannung