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Summary of Contents for Sourcetronic MD-5060 Series
- Page 1 MD-5060x 5 kV digital insulation tester User’s Guide GU-1290 © 2008 SOURCETRONIC. All rights reserved. Printed in Germany.
- Page 2 Safety warnings Before to use this instrument the User’s guide and Safety warnings must be read and understood. Safety procedures and rules for working near high voltage energized systems must be observed during the use of this equipment. The generated voltages may be dangerous.
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Page 3: Table Of Contents
Index 1. Description ......................6 2. Control panel ..................... 8 2.1. Keyboard ....................9 2.2. Indicators ....................11 2.2.1. High voltage indicator ................. 11 2.2.2. Display ....................11 3. Tests definition ....................12 3.1. Test voltage ....................13 3.2. OP. MODE ....................13 3.3. -
Page 4: Description
1. Description The SOURCETRONIC model MD-5060x digital smart insulation tester is versatile, robust and easy-to-use equipment. It uses an efficient well experienced technology, which provides reliable, safe and accurate measurements of insulation resistances up to 5,000,000 MΩ @ 5 kV, with 4 pre-selected test voltages: 500 V - 1 kV - 2.5 kV - 5 kV, with the... - Page 5 Other features important in this equipment are the negative voltages that refer to the zero potential terminal (R), for detecting moisture within the installations, due to the electroendosmosis effect. Due to its reduced dimensions and weight, power supply autonomy and mechanical resistance, this equipment is suitable for fieldwork under extreme weather conditions.
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Page 6: Control Panel
2. Control panel Voltage output terminal (-V) Keyboard Zero reference terminal (+R) RS232 communication port Guard terminal (G) Power supply input Display Paper feed control... -
Page 7: Keyboard
2.1. Keyboard Button Function On/Off switch. When activated, it allows to program test 100 V steps test voltage in steps of 100 V. It enables the fast voltage. voltage selection keys When activated, it allows to program test 500 V steps test voltage in steps of 500 V. - Page 8 When activated, it allows to program the limit of Indicates LIM function the “Pass-Fail test”. is on. Increase the value that is being programmed. Decrease the value that is being programmed. It activates the filter that minimizes external Indicates filter function noise interference.
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Page 9: Indicators
2.2. Indicators 2.2.1. High voltage indicator A light indicator displays the occurrence of high voltage on the output terminal during the measurement and keeps lit until the discharging process has been completed. Do not touch the test leads before the high voltage indicator turn-off. 2.2.2. -
Page 10: Tests Definition
It has a real time clock with date, hours and minutes indication, to make identification of tests recorded in paper or in memory easier. Test number Tests are automatically numbered by the equipment to make their identification easier. The test number is printed at the beginning of each test and it is stored in memory. -
Page 11: Test Voltage
3.1. Test voltage key enable the test voltage programming mode. Whenever the equipment is turned-on, the key will be selected by default. :: Enables test voltage adjustments in 100 V steps. :: Enables test voltage adjustments in 500 V steps. Pre-set voltages Fast selection keys for pre-set test voltages. -
Page 12: Lim. "Pass-Fail Test
SVT Mode Carries out the step voltage test automatically, always starting with 500 V and reaching the programmed voltage, in 500 V steps. Timer Mode Defines the test duration. The possible values are 30 sec, 1 min, 3 min, 10 min and 30 min. The defined time is shown on the display. This programming must be carried out before starting the test. -
Page 13: Voltmeter
finished or until the measured resistance limit is higher than the programmed limit. 3.4. Voltmeter By pressing the key, the equipment will measure the voltage effectively applied to the element being tested. 3.5. Memory (HOLD) key allows to hold the last performed reading on the display, at the moment this key was pressed, without interrupting the test. -
Page 14: Polarization Index (Pi)
maintenance on the coils (transformers, engines and motors, generators, etc.). 3.8. Polarization index (PI) key makes it possible to visualize the Polarization Index value on the display. For this type of test, the equipment must be connected and applying voltage to the sample for 10 minutes. After this period, the operator must press the key to show the PI value on the instrument display. -
Page 15: Built-In Printer
After the test is finished, the value can be recovered by pressing the key. 3.10. Built-in printer In order to enable the printing function press key. Measured values will be printed each 15 seconds, and the Dielectric Absorption Index and Polarization Index will be printed after 1 minute and 10 minutes respectively. -
Page 16: Auto Power-Off
3.12. Auto power-off The Auto-Power-off function turns off the equipment consumption (independently of the timer function) in two situations: During the measurement - After 35 minutes of operation, without allowing that the battery status checking function is carried out during that period. -
Page 17: Step By Step Instructions
Permanent green The charging process has been successfully finished. Battery OK. Flashing green The charging process has finished, nevertheless the battery hasn’t received the complete charge. At the end of battery useful life, the battery must be recycled or disposed of properly, in order to protect the environment. The rechargeable battery does not show the “memory effect”... - Page 18 (for example, between two phase conductors in a tree-phase cable), the megohmmeter GUARD terminal must be grounded. This implies that whenever a measurement is performed, one of the GUARD or R terminals must be grounded, both them simultaneously. SOURCETRONIC...
- Page 19 Application Note 32 explains the usage of Guard terminal for minimizing the parasite resistance effect, whose influence one intends to minimize. Turn the equipment by using the On/Off switch. The following message will appear on the display: The PRESS START message will appear immediately. In order to make repetitive tests performance easier, when the equipment is turned on, the test voltage will be the same voltage selected for the last performed test, meanwhile the equipment will be...
- Page 20 Press key. The high voltage led turns on immediately, indicating that the equipment internal generator is applying voltage to the element that is being tested. If, during the test, it is necessary to change the test voltage, item 7 sequence shall be repeated. 10.
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Page 21: Megalogg2 Software
14. If the measured value exceeds 5 TΩ @ 5 kV, the following message will be read: 6. MegaLogg2 Software This software makes communication between the equipment and a computer with Windows operative system easier. It makes it possible to synchronize the date and time of the equipment internal clock with the computer date and clock, to transfer the stored date, to clear the memory, to generate tests graphics and protocols, etc. - Page 22 The equipment has an RS232 output in the control panel that can be used to register measurements in a serial printer or data collector. The outputs are the following ones: Pin 2: Rx ; Pin 3: Tx ; Pin 5: Gnd; Transfer data to a computer To transfer data from the MD-5060x to a PC-type computer, use the cable provided with the accessories.
- Page 23 Then check if there is an accessible communications port, for instance Com 1 or Com 2. Choose the correct port in the next window. In this example, the port would be Com 1. After clicking on OK, go to the next window to fill out the relevant data 4800, 8, none, 1, none.
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Page 24: Printer
8. Printer Printing sample... -
Page 25: Technical Specifications
Paper feed The , switch, which is a blue key located in the left upper part of the printer body, is the Paper feed control. Press this key 3 times after the test is finished and before cutting the paper, in order to visualize the last lines. - Page 26 Test voltages : 500, 1000, 2500, 5000 V with fast selection. 500 V to 5 kV in 100 V or 500 V steps. DC, negative in relation to grounding. Maximum resistance reading : 5 TΩ @ 5 kV. Short circuit current : 1.5 ±...
- Page 27 Power supply : Internal rechargeable battery (12 V - 2.3 Ah). Battery charger : 100 - 240 V~ mains supply. Operating temperature range : -5°C to 50°C. Storage temperature range : -25°C to 65°C. Humidity range : 95% RH (non condensing). Dimensions : 274 x 250 x 124 mm Equipment weight...
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Page 28: Application Note 32
10. Application note 32 Use of “Guard” terminal in insulation testers When insulation resistance measurements are performed with insulation testers, especially with high sensitivity instruments measuring high resistance values, the use of the GUARD terminal avoids the harmful influence of stray resistances. In order to better explain the function of this terminal, let us start reviewing the megohmmeter basic circuit diagram of fig. - Page 29 A typical example of this situation is when the insulation resistance between primary and secondary windings of a transformer mounted inside a metal housing is to be measured. Rx: Insulation resistance between primary and secondary winding. R1: Insulation resistance between primary winding and housing. R2: Insulation resistance between secondary winding and housing.
- Page 30 In the circuit of Fig. 3 it may be noted that R1 is in parallel with a low- value resistance (the one from the micro-ammeter) therefore its influence is reduced during reading. Through resistance R2 circulates a current which is not passing through the meter and consequently does not affect the reading.
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Page 31: Warranty
To obtain warranty service, send the equipment, with a description of the difficult, shipping and insurance prepaid, to SOURCETRONIC. The manufacturer assumes no risk for damage in transit. SOURCETRONIC will, at its option, repair or replace the defective equipment free of charge or refund your purchase price. However, if... - Page 32 NOTES...
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