Automatic Dielectric Loss Tester is powerful and serialized
(1) It has multiple working modes: normal/reverse wiring, internal/external standard capacitor, internal/external high voltage. Integrated structure, can do various conventional dielectric loss tests without external auxiliary equipment.
(2) LCD display, menu operation, rich test data, automatically distinguish capacitance, inductance, resistance type test objects. Built-in micro printer for printout.
(3) Has external standard capacitor interface, can connect external oil cup for precision insulating oil dielectric loss test, can connect external solid material measuring electrode for precision insulating material dielectric loss test, can also connect external high voltage standard capacitor for high voltage dielectric loss test.
(4) Automatically recognizes 50Hz / 60Hz system power supply, supports generator power supply, even if frequency fluctuates greatly, can measure normally.
(5) Built-in series and parallel dielectric loss measurement models for easy instrument calibration.
(6) Can store 255 sets of measurement data.
(7) When measuring CVT self-excitation method, C1/C2 can be measured simultaneously with one wiring, automatically compensates for bus grounding and standard capacitor voltage divider effects, no need to change wires or connect any external accessories.
(8) Chinese graphic menu, large screen backlit LCD display clearer, real-time monitoring of current and voltage.
(9) Optimized circuit design makes accuracy and stability of normal/reverse wiring *.
(10) Automatically recognizes external high voltage test power frequency 40Hz~70Hz, supports power frequency, variable frequency, and series resonant power for large capacity high voltage dielectric loss tests.
(11) Has reverse wiring low voltage shielding function, under 220kV CVT bus grounding condition, can perform non-disassembly 10kV reverse wiring dielectric loss measurement on C11.
(12) With computer interface. Through this interface, measurement, data processing and report output can be realized, also can realize internal measurement software upgrade. Can be integrated into comprehensive high voltage test vehicle.
1.3 Automatic Dielectric Loss Tester supply scope
(1) Instrument main unit (2) User manual and product certificate
(3) Special test cable (4) Power cord
(5) Spare printer paper and fuse (6) Others see the Packing List
2. Panel description
2.1 High voltage output socket (0.5~10kV, max 200mA)
Installation position: front side of the box, with protective door outside.
Function: internal high voltage output; detect reverse wiring test object current; high voltage end of internal standard capacitor.
Wiring method: socket pin 1 connects to high voltage wire core (red clip), pins 2, 3 connect to high voltage wire shield (black clip). In normal wiring, both high voltage wire core (red clip) and shield (black clip) can be used as voltage application wire; in reverse wiring, only core wire can be used to apply voltage to the high voltage end of the test object. If the high voltage end of the test object has a shielding electrode (such as a shielding ring at the high voltage end), it can be connected to the high voltage shield; if no shield, the high voltage shield is left floating.
Precautions:
(1) The instrument measurement cables are universal, it is recommended to use high voltage wire to connect this socket. The high voltage socket and high voltage wire have dangerous voltage, absolutely prohibit touching the high voltage socket, cable, clips and live parts of the test object! Confirm power off before wiring, and keep away during measurement!
(2) When using standard dielectric loss device (or standard capacitor) to verify reverse wiring accuracy, use fully shielded plug to connect the test object, otherwise exposed core wire will cause errors.
(3) Ensure zero resistance connection between high voltage wire and high voltage end of the test object, otherwise it may cause errors or data fluctuation, and may also cause instrument protection.
(4) When removing wiring under strong interference, disconnect the connection while keeping the cable grounded to prevent induced electric shock.
2.2 Test object input Cx socket (10μA~1A)
Function: input test object current in normal wiring.
Wiring method: socket pin 1 connects to measuring wire core (red clip), pins 2, 3 connect to measuring wire shield (black clip). In normal wiring, core wire (red clip) connects to low voltage signal end of test object, if the low voltage end has a shielding electrode (such as shielding ring at low voltage end) can connect to shield, if no shield, shield is left floating.
Precautions:
(1) Strictly prohibit unplugging the plug during measurement to prevent test object current from passing through human body to ground!
(2) When using standard dielectric loss device (or standard capacitor) to verify normal wiring accuracy, use fully shielded plug to connect the test object, otherwise exposed core wire will cause errors.
(3) Ensure zero resistance connection between lead wire and low voltage end of test object, otherwise it may cause errors or data fluctuation, and may also cause instrument protection.
(4) When removing wiring under strong interference, disconnect the connection while keeping the cable grounded to prevent induced electric shock.
2.3 Standard capacitor input Cn socket (10μA~1A)
Function: input external standard capacitor current.
Wiring method: similar to Cx socket, the difference is:
(1) When using external standard capacitor, use fully shielded plug to connect. This method is commonly used for external high voltage level standard capacitor to achieve high voltage dielectric loss measurement.
(2) Select "External Cn" mode in menu.
(3) Input the C and tgδ of external standard capacitor into the instrument to achieve absolute value measurement of Cx capacitance and dielectric loss.
In principle, any capacitor with any capacitance and dielectric loss, if its parameters are input into the instrument, can be used as standard capacitor. The difference is that standard capacitor can provide better long-term stability and accuracy.
(4) Regardless of normal or reverse wiring measurement, the standard capacitor wiring is always normal wiring.
2.4 CVT self-excitation method low voltage output socket (3~50V, 3~30A, C type without)
Function: output low voltage variable frequency excitation power for CVT measurement from this socket and grounding terminal.
Precautions:
(1) Due to large low voltage output current, use special low resistance wire to connect CVT secondary winding, poor contact will affect measurement.
(2) Select appropriate voltage and current protection limits from menu according to CVT capacity.
(3) When starting CVT measurement, output 2~5V test voltage, if external wiring is wrong, it will automatically stop. If suspect instrument fault, can measure whether there is this test voltage.
(4) When selecting normal/reverse wiring, this output is blocked.
2.5 Measurement grounding terminal
It is connected together with the shell and the ground wire of the power socket.
