Huazheng HZ-4000T2 User manual

HZ-4000T2
Cable fault location system
Operation Manual

Please read the instructions carefully before using !!!
★Operator must possess professional operation qualifications for
high-voltage equipment
★Strictly follow the national high-voltage equipment operating
specifications
★This instrument has a high-voltage characteristics, please pay
attention to personal and equipment safety
★Make sure that the ground is good and the wiring is correct
★Unload the residual voltage by following this instruction after
using

HZ-4000T2 Cable Fault Location System
Introduction
I. Introduction
1 It is a one body trolley structure, easy handling at site.
2 You can do site test without complex wiring, because all test modes and switching
voltage levels are automatically switched by weak control internal high-voltage
switches.
3 It can quickly locate and point low resistance, high impedance fault leakage,
flashover faults in power cable with a variety of 220V-220KV voltage level.
II.Characteristics
1 It integrates multi-gear DC high-voltage generator, multi-gear high-voltage
capacitor, arc-stabling units and a variety of signal acquisition in one body, which
facilitates fault location operation.
2 Switching between three gear test modes, two gear voltage levels is controlled by
low-voltage weak electricity.
3 World's leading test method makes difficult fault detecting become very simple.
4 The requirement to operators’ level for technical equipment is low.
5 The DC voltage is up to 32kV.
6 Each stall of voltages, which is 16 / 32kV, can output up to 1536 J impact energy. It
has longer ranging delay arc time and makes a loud voice on the fault point when
locating.
7 It can do high impedance fault detection directly without burning.
6 Large wheels ensure a smooth, easy handling and site work.

III. Technical Indicators
1 Test methods: Arc reflection method, current sampling, and DC output.
2 Types of sampling signals: Arc reflection method, current sampling, and
low-voltage pulse.
3 DC voltage output:
0 ~ 32kV Negative Maximum output current: 76mA
0 ~ 16kV Negative Maximum output current: 152mA
4 Impact capacitor:
0 ~ 32kV 3μF Maximum output energy: 1536 joules
0 ~ 16kV 12μF Maximum output energy: 1536 joules
5 Ball-gap discharge: Weak electricity control. Discharge cycle can be adjusted within
3-12 seconds. It has a specially designed silencer, which meets the requirement of
silence when fault happened to the initial end cable.
6 Protection:
Zero voltage position protection: To prevent misuse, and to protect the safety of
personal and the test product;
Press "off" button, and it will release the remaining charge automatically through
safety instrument inside to ensure safety.
7 It is equipped with extension cable tray, which can be composed of automotive
cable fault location system.

HZ-4000T2 Cable Fault Location System Operation
Guide
I. External wiring
1 Perform test wiring as figure below:
From left to right: 输入：Input 电缆故障定位系统：Cable Fault Location System
高压输出电缆：High-voltage output cable 保护地：Ground of protection
红夹子： Red clip 黑夹子： Black clip
系统地： Ground of system 故障电缆： Fault cable
2 The following figure is wrong test wiring:
From left to right: 输入：Input 电缆故障定位系统：Cable Fault Location System
高压输出电缆： High-voltage output cable 错误连接：Wrong wiring
红夹子： Red clip 黑夹子： Black clip
系统地： Ground of system 故障电缆： Fault cable

II. Panel Figure
In the drawing:
1. total switch
2. Adjusting the ignition time
3. Selecting test voltage
4. Selecting Test Mode
5. Start, ignition, stop key
6. Regulator knob
7. Output voltage indicator
8. Output current indicator

9. Signal terminals
III. Operation Steps
1. Correctly connect "Cable Fault Location System" and ground, faulty cable, AC
220V power line according to the external wiring diagram. It can also be connected
via extension cable drum if equipped with one.
2. If you are preparing to locate the cable fault, connect the signal test line on "Cable
Fault Location System" control panel with corresponding signal port on the pulse
reflect meter (TDR). Best use its own battery for TDR.
3. Turn on the power switch; the instrument will do self-test for about 15 seconds.
You can carry out subsequent operations if the self-test is passed. The buzzer will
prompt you by long and short syllable if the self-test isn’t passed.
4. Adjust the ignition time knob and test voltage gear button, and test mode gear
button (if the test instrument is in high-voltage charged state or start state, the test
voltage, test mode adjustment operation is invalid).
Ignition time: High-voltage ball-gap ignition intervals on impact, usually
adjusted for 4-12 seconds.
Each test voltage gear selection: The lower voltage gear you select, the greater
the impulse condenser capacity is, and the greater the impact energy the fault cable
get at the same voltage when you are sure that the cable is already breakdown, which
is conducive to fault location, location.
The meaning of each test method is as following:
A. Multiple pulses (stable arc): When doing cable high impedance fault distance test,
contrast the waveform of not breakdown and breakdown on same-phase fault on one
screen.
B. Current sampling: When doing cable high impedance fault distance test, it

captures the current signal waveform reflected back and forth in the cable when
impact.
C. Location: Cable fault pinpoint use.
D. DC output: It can output DC high-voltage to test cable.
5. Confirm that regulator knob is at zero and stop key is in non-locked state. Press the
start key to start the instrument, and you can hear "plump" sound inside the
instrument, which means that the high-voltage output of the instrument is connected.
6. Press the ignition button (except DC output mode), and the instrument will perform
arcing ball-gap pulling in according to the set time. You can hear the ball-gap
regularly pulling in sound.
7. Adjust regulator knob up to the required voltage (The boost can be slightly low, and
gradually increased, but do not set voltage exceeding the voltage gear when it’s the
first connection).
8. The operator pulse reflect meter (TDR) will test input signals and read fault
distance if it’s cable fault location mode.
9. When the test is completed, the regulator knob should be back to zero, and press
stop key to stop and it will automatically discharge. If an emergency situation
happened, you can press stop key to stop directly and it’ll automatically discharge.
10. If you need to adjust high-voltage test, repeat steps 4-9. If you want to stop the test,
turn off the power switch.
11. Artificial discharge, confirms discharged completely, and then remove all the
wiring.
IV. Warning and Note
1. Do not set voltage over the voltage gear when boosting.
2. Do not strongly pull and fold the output high-voltage silicone cable, power line,

and ground to hard curves. Heavy things, such as automotive, rolling on it is
prohibited.
3. Do not use the instrument in an inclined state. If you have to use it in sloping
ground, please pad something to horizon level.
4. Do not allow the instrument stopped using more than 20 minutes. Turn off the
power switch if you do not use it in a long-term.
V. HZ-4000T2 Cable Fault Location System Physical List
1 HZ-4000T2 cable fault location system host
2 High-voltage cable 8 meters
3 Ground line 8 meters
4 Power line 1
5 Extended high-voltage cable tray (optional)
6 Extended power line cable tray (optional)
7 Extended ground line cable tray (optional)

HZ-400T2 Cable Fault Tester Introduction
HZ-4000T2 cable fault tester is a new type power cable test equipment designed
by our company based on the current low level of China's electric power system
management, lagging of test methods. The instrument uses advanced microcomputer
technology, which makes power cable test as a whole, so that user has advanced test
equipment and advanced test techniques, and can pass test waveform to a computer if
he has a set of the instrument. The instrument is used as a powerful cable file
management tool.
I. Main Features
Fault test of power cable has been a headache for power system. Using cable fault
test capabilities provided by this system will make it very simple. In line with the
different nature of power cable fault, the system can perform test in a variety of test
methods(such as multiple pulse, high-voltage impulse flash, high-voltage direct flash,
voltage sampling, current sampling, low pulse, etc.), and therefore it can perform
reliable tests to high resistance fault, low resistance fault, flashover fault and leak
fault in power cable.
II. Product Characteristics
● Test mode: A variety of test methods such as multiple pulse/arc reflection method,
voltage sampling, current sampling, low-voltage pulse can be implemented to meet
convenience and usage habits of users on maximum to test.