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Summary of Contents for Huazheng HZ-3340D
- Page 1 HZ-3340D DC Resistance Test Instrument USER MANUAL Huazheng Electric Manufacturing(Baoding) Co.,Ltd...
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Page 2: Table Of Contents
Contents I.Overview ..............................1 II. Safety Measures ............................1 III. Performance Characteristics ........................2 IV. Specifications ............................3 V.System Introduction ..........................3 VI.Test and Operation Method ........................5 VII.Attentions .............................. 17 VIII. Common Problems and Their Solutions .................... 18 VIII. Instrument Completeness ........................19 IX.After-sales Service .......................... -
Page 3: I.overview
Fast measurement of DC resistance of transformers, huazheng has developed a new generation of huazheng series DC resistance test instrument using its own technological advantages. -
Page 4: Performance Characteristics
be removed after discharging alarm sound is ended upon test completion. 8.For no-load voltage regulation winding, it is forbidden to switch the no-load tap changer when test is being conducted or discharging is not completed. 9.When the power supply suddenly fails during the test, the instrument will start to discharge automatically. -
Page 5: Specifications
measuring accuracy, good stability and repeatability, high portability, etc. Specifications 1.Output current: automatic, 40A, 20A, 10A, 5A, 2A, 1A, 200mA, 100mA, 20mA 2.Range: Automatic (0.1-40A) 0 - 200Ω (three-phase simultaneous measurement 0 - 120Ω) 0 – 0.5Ω (three-phase simultaneous measurement 0 – 0.3Ω) 0.0005 –... - Page 6 Figure 1 Binding post terminal area IA, IB, IC, and IO terminals: current output terminals for YN winding measurement. VA, VB, VC, and VO terminals: voltage input terminals for YN winding measurement. Ia, Ib, and Ic terminals: current output terminals for D or Y winding measurement. Va, Vb, and Vc terminals: voltage input terminals for D or Y winding measurement.
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Page 7: Vi.test And Operation Method
VI.Test and Operation Method 1. Measuring wiring: the test product is connected to the test terminal of this machine through a special test cable. The large inserting piece of the test cable is connected to the current terminal, and the small inserting piece is connected to the voltage terminal. - Page 8 Single-channel direct measuring wiring: see Figure 4 for (YND11 transformer CO phase measurement). a b c 细线 细线 I0(I-) IC(I+) YND11 Transformer 变压器 V0(V-) VC(V+) Instrument terminal 仪器接线柱 Figure 4 Item-by-item measuring of Y winding: see Figure 5 for (separate measuring of each phase of Y winding) Y winding wiring.
- Page 9 using the single-channel method. (ac phase) (ab phase) (bc phase) (ac相 ） (ab相 ) (bc相 ） Figure 6(2) 2.Starting up: Connect the power line supplied with this machine to the AC power input port. Turn on the power switch. Then the LCD will be turned on. (If the input power supply AC220V is connected into AC380V by mistake, the internal protection device of the instrument will function, the internal power supply will be cut off, and the buzzer will always give an alarm.) The Company's LOGO interface will be displayed on the screen.
- Page 10 "YN three-phase compensation" mode: YN winding three-phase three-channel test mode (including O-phase resistance through compensation mode). “YNd11 magnetic assist” mode: large three-core and five-column YNd11 connection mode reduces the low-voltage test stabilization time by means of HV-to-LV magnetic assist. "YN phase selection" mode: YN winding three-phase respective selection test mode (including O-phase resistance).
- Page 11 Figure 8 By touching the display area to be set, the input soft keyboard will pop up automatically; then according to the requirements of the prompt, input the corresponding information and modify the corresponding setting. After setting completion, touch the “Exit” button to return to the optional setting main interface. 6.
- Page 12 Under Test Print Save Fast Tapping- Tapping+ Conversion Exit Figure 9 After test completion, touch the “Exit” button. Then the instrument is discharged automatically to end the test and return to the optional setting main interface. 6.2 After starting the test, the display screen indicates the value of the test charge current while giving the prompt “Recharging...”;...
- Page 13 After test completion, touch the “Exit” button. Then the instrument is discharged automatically to end the test and return to the optional setting main interface. 6.3 "YN three-phase compensation" test (applicable to YN three-phase winding multi-tap transformer resistance measurement) Step 1: measure AO, BO and CO phase selection resistances. After starting test, the display screen is switched to YN three-phase option test interface (Figure 11).
- Page 14 of the screen (Figure 14). The instrument conducts continuous tests. Note: keep the same tapping position during step 1 and step 2 test processes, which will otherwise affect the compensation value and cause data inaccuracy. Step 3: simultaneous measurement of the next tap three phases Adjust the on-load tap-changer to the corresponding tapping position, observe data stability, and read data.
- Page 15 Under Test Print Save Fast Tapping- Tapping+ Conversion Compensation Exit Figure 13 Under Test Print Save Fast Conversion Tapping- Tapping+ Exit Figure 14 Other auxiliary functions are the same as those in single-channel test. For details, see “Single-channel” test. After test completion, touch the “Exit” button. Then the instrument is discharged automatically to end the test and return to the optional setting main interface.
- Page 16 value and the LV ca phase resistance value are displayed. Observe the stability of the test current value and resistance value. The instrument conducts continuous tests. After the resistance data are stable and readable, touch the “Stop” button. Then the instrument will automatically discharge, and the “AO-ca” phase resistance test will be ended.
- Page 17 phases respectively. Under Test Print Save Fast Conversion Tapping- Tapping+ Exit AO phase BO phase CO phase Stop Figure 16 Other auxiliary functions are the same as those in single-channel test. For details, see “Single-channel” test. After test completion, touch the “Exit” button. Then the instrument is discharged automatically to end the test and return to the optional setting main interface.
- Page 18 Under Test Print Save Fast Tapping- Tapping+ Conversion Exit ca A ab phase bc phase Stop Figure 17 6.7 “Demagnetizing” test Demagnetizing method: the “single-phase test” wiring method is used in demagnetizing wiring (taking the use of red and black test lines as an example). Firstly connect the current and voltage terminals of the red test line with C phase;...
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Page 19: Vii.attentions
recorded data. If there is no data for view, the interface will show “No Record Temporarily”. Import into U Disk: press the “U Disk” function button in the optional setting main interface to import the instrument memory data into a “U disk”. If there is no data for export, the interface will show “No Record Temporarily”.Please firstly insert a U disk. -
Page 20: Common Problems And Their Solutions
6.The three-phase simultaneous measuring mode is used to measure YN HV, MV and LW star windings. In order to eliminate the impact of O column resistance on the data, it is proposed to use the YN three-phase compensation” mode in three-phase simultaneous measuring. VIII. -
Page 21: Instrument Completeness
VIII.Instrument Completeness Principal Unit of JYR DC Resistance Test Instrument 1 uit Test Line 1 set Three-core power line 1 piece Fuse 10A 2 pieces Certificate of approval/ warranty card 1 piece Packing list 1 piece Operation manual 1 copy IX.
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