Huazheng HZ7411 User Manual Download Page 3

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IX On-site common problems

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8.4 On-site closing and opening control wiring is incorrect or there is a problem in the control loop

9.2 The instrument prompts "Power supply current output exceeds limit, over-current protection
action"

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9.3 The instrument has no DC power output

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Summary of Contents for HZ7411

Page 1: ...HZ7411 Circuit Breaker Dynamic Characteristic Tester User Manual Huazheng Electric Manufacturing Baoding Co Ltd...

Page 2: ...ormance 2 2 1 Time 2 2 2 Speed and stroke 2 2 3 Speed and stroke 2 2 4 Current and voltage 2 2 5 Closing resistance 2 III Term definitions 2 IV Panel layout 4 V Menu operation instructions 5 5 1 Data...

Page 3: ...5 8 4 On site closing and opening control wiring is incorrect or there is a problem in the control loop15 9 2 The instrument prompts Power supply current output exceeds limit over current protection a...

Page 4: ...lution is 0 1ms and the error is 0 1ms 1 word when the range is 10000 20000ms the resolution is 1ms and the error is 1ms 1 word 1 3 2 Speed Range is 20 00m s resolution is 0 001m s error 0 01m s 1 wor...

Page 5: ...rrent value and current waveform of the opening closing coil and provides DC5 270V 10A 20A digital adjustable circuit breaker operation power supply automatically completes the low voltage operation t...

Page 6: ...ition Applicable circuit breaker model 1 10ms after opening before closing Certain oil switches and SF6 circuit breakers 2 5ms each after opening before closing Certain oil switches 3 10ms each after...

Page 7: ...in the sampling section in the time stroke characteristic curve in the measurement result IV Panel layout Figure 1 No Panel logo Function Description socket Instrument AC220V working power switch and...

Page 8: ...There are 6 function area buttons on the homepage which are Data measurement File management Brightness adjustment Time calibration System settings and Serial communication Click the buttons to enter...

Page 9: ...low trip is performed when one of the 12 fractures is closed The user can select the corresponding test mode according to the test requirements and the current fracture state After clicking the mode...

Page 10: ...external trigger The internal trigger mode is to use the internal DC power of the instrument to drive the on off coil of the device under test In the external trigger mode the internal DC source of t...

Page 11: ...g time of the device under test b When doing a re closing test it should meet the inherent opening and closing time that is greater than the multiple actions of the device under test Sum of time Reclo...

Page 12: ...test Enter the corresponding interface by selecting the button in the upper right corner of the figure For example the test data interface contains all the test result data and the graphic analysis c...

Page 13: ...indicator Or open button to operate Figure 7 Figure 7 Figure 8 5 1 3 Low voltage test If you select the Open Close Low Jump test mode the screen will switch to the Start Test interface in this mode a...

Page 14: ...ue display areas of t1 and t2 are white Clicking on any one of the white areas will change the background color the background color of t1 becomes pink and the background color of t2 becomes light gre...

Page 15: ...a special grounding wire Please connect the protective ground of the instrument to the field ground before performing other wiring and operations After the test turn off the power of the instrument r...

Page 16: ...switch off control power is provided by the instrument disconnect the control power in the switch control box under test usually disconnect the fuse connected to the control power in the control box...

Page 17: ...de the switch body When the switch manufacturer leaves the factory for speed tests the switches are tested on the switch opening and closing indicators or rotary shafts In this case angle sensors are...

Page 18: ...tion function to start and the instrument closes and opens the control power has no output Shut down at this time and check the wiring again according to the first item above b The instrument may not...

Page 19: ...as no DC power output This kind of situation may be caused by the burnout of the power supply insurance of the instrument and the loss of power supply to the entire instrument At this time the replace...

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