China 10kv Output Voltage 100mA Output Current Ehv Cable Sheath Fault Locator

Product Description
1.Introduction
FLD-66 EHV cable sheath fault locator is used to locate the EHV cable sheath fault and it also could offer HV impulse signal source for the EHV cable sheath pinpointing.
It could pinpoint the cable sheath fault matched with device FLD-86 step voltage pin-pointer.
2.Design FeaturesAuto testing. Big LCD displays the distance directly. Easy operation and solute the difficulty of HV Bridge balance adjusting.Overcome with the effect to the result by the connecting resistance. High locating accuracy.Use core wire to locate the sheath fault. Overcome the HV bridge disadvantage that can't locating because lack of good insulation sheath in site.Built-in HV continuous current. Output voltage and current is continuously adjustable and long time short circuit is allowedGrounding lock and HV zero start and such safety protection functionBoth functions of locating and HV impulse signal source. Both for sheath fault locating and EHV cable sheath fault pinpointingHigh output current for sheath DC voltage withstand testAuto power off when under-voltage and long-time no-operationTechnical Specification

Output voltage0~10kV adjustableOutput current0~100mA adjustableMax. output range1kWAccuracyDeviation ≤0.1%Power supplyAC 220V,50Hz,6AVolume480mmx330mmx360mmWeight15 kgOperating Temperature -10ºC-40ºCHumidity10-90%RHElevation<4500m

3.Physical Characteristics

3.1 Device appearance:
Refer below fig.1

Figure1. FLD-66 EHV cable sheath fault locator
3.2 Panel introduction:
Introduction:
Fig.2 Panel introductionAC 220: insert 22V, 50Hz AC power. The power and power line should bear current above 6APower on/off: device on or offP: power light to indicate the device power, protect grounding and test grounding condition. Light bright when power on. Light flicker and automatically lock HV on function when device doesn't ground or bad ground HV: HV output indicator. Light bright when HV outputV display: display device output voltageVoltage adjustment: adjust device output voltage according the withstand voltage of tested cable Zero: voltage adjustment Zero position indicate. only when the Voltage adjustment button on this position, the HV on function is workable. A display: display device output currentCurrent adjustment: adjust device output current according requirements.HV on: when start the FLD-66, no voltage output. When the Voltage adjustment button is Zero position, press HV on button to output voltage. When HV output, this button is bright and the HV bright HV off: stop HV output. It is bright when no HV output FLD/Impulse: The this button up, the indicator is bright,FLD-66 work in FLD output mode. When this button down and bright,FLD-66 work in impulse output mode. This mode is used to do sheath fault pinpointing.This button is workable when device under HV on condition Last step/next step//confirm/i: Device operation button LCD screen: display operation reminder, testing item, testing process, and test result Fault phase: Connect with fault cable sheath. Insert the pin with red clip Aux. cable: connect good grounding-insulation cable sheath or core wire. Insert pin with green clip Test grounding: connect with grounding connector, insert pin with blank clip. Protect grounding: protect grounding of device. Before use device, grounding is must3.3 Junction box:
When FLD-66 works, we need a junction box in the other end of cable. Panel is as below:
Fig.3 junction box panel
Introduction:Fault phase: this output cable connects with red clips, corresponding with the FLD-66 Fault phase and connect with the fault cable sheathAux. wire: this output cable connects with green clip, corresponding with the FLD-66 aux. wire and connect with the cable sheath or cable core wire of auxiliary line or phaseTest grounding: This output cable connects with a black clip and connect with the ground connector. Both clip and pliers are offered for convenience4.Operation method
4.1Sheath fault distance locating
4.1.1 Prepare
If the insulation resistance of cable sheath-ground is huge, use the FLD-66 to burn the fault point first. Testing until the insulation resistance reduces to 100 KΩ will get more accuracy result.* Burn of cable point sheath refers below operation of DC Withstand voltage test.
FLD-66 EHV cable sheath fault locator need at least one grounding well cable sheath or cable core wire and their resistance-to-ground should be bigger than the resistance-to-ground of the fault sheath.
Before testing, use mega-ohm meter to test the sheath-to-ground insulation of all cable and we call it the 'fault phase'. Find the cable core wire or sheath with biggest insulation resistance (above 1000 times sheath resistance) and we call it auxiliary line. If both the core wire and sheath reach the requirements, the core wire is preferred.
For describe, below we adopt fault phase, auxiliary line to instead the cable core wire or sheath.
4.1.2 Wiring
There are several wiring methods as below, choose different methods according the site condition.

Use cable core as auxiliary line

If there are well ground insulation core wire in test site could be used, it's priority selection to use it as auxiliary line. Diagram as below fig.4
Fig.4 cable core wire as aux. line

Use cable sheath as auxiliary line

If no core wire could be used, the best ground insulation cable sheath could be used as aux. line. Wiring diagram as below:
Fig.5 cable sheath as aux. line
Connect the power line and HV output line of FLD-66 EHV cable sheath fault locator. The red clip connects with the fault phase sheath, the green clip connects with the aux. line, and the black clip connects with unused cable core wire or cable sheath to ground. We suggest to grounding all other unused cable sheath and cable core. Grounding the protect ground of FLD-66 and make it well grounding. And connect the grounding line with discharging rod.
4.1.3 Opposite end junction box wiring
Corresponding with wiring of sheath fault locator, the red clip should be connected with the fault sheath, the green clip should be contacted with aux. line and the unused cable sheath or core wire should be grounded by the black clip.
4.1.4 Device grounding checking
Power on the device and the power indicator lights to show it is well grounding. If the power indicator flickers, it shows there is larger resistance of testing ground and protect ground. Then we should power on and check the protect ground and work ground. There are maybe oxide layer between clips and grounding connector. To solve it, we could rub the oxide layer when clip the connector to make well connection.
4.1.5 Sheath fault locating operation
When power on, the LCD screen will display the software version no. first and enter the prompt interface after 2 seconds. If the DC/Impulse indicator flickers, we need to press this button to enter the FLD working condition.

Wiring prompt. Refer below diagram 6:

Prepare: wiringWiring definition:
Aux. line: Which has largest ground insulationNear-end locator wiring
Red clip--connect fault sheath
Green clip-connect aux. line
Black clip(testing ground)-grounding
Protect ground--groundingFar-end locator wiring
Red clip--connect fault sheath
Green clip-connect aux. line
Black clip(testing ground)-grounding
Please ground the two ends of the unused cable sheath and core wireConnect and check. Press Confirm button

Fig.6 wiring prompt
*Check whether the device wiring and the junction box wiring is same as the FLD prompt message. If correct, press Confirm button.

System zero calibration

Zero calibration interface as below

First step: System zero calibration
Output voltage: 932.87mV
Sheath voltage drop: 2μV
Output current: 0.46μA/confirm/i under the HV condition,
Press data stabilization, press Next Step button

Fig.7 system zero calibration
When system zero calibration, the HV output should be closed. If didn't close the HV output, the device will auto test and has audio alarming. At the meantime, lock the Next step operation until close the HV output. Confirm the HV off indicator lights and press Next step button to begin system zero calibration. Interface as below fig. 8

First step: System zero calibration
Output voltage: 932.87mV
Sheath voltage drop: 2μV
Output current: 0.46μA

Zeroing… please waiting

Fig.8 system zero calibration
When after system zero calibration, the display interface as below fig. 9. Press Next step to continue and if want to zero calibrate again, press Last step button.

First step: System zero calibration
Output voltage: 0 mV
Sheath voltage drop: 0μV
Output current: 0μA
Zero calibration finished
Press Last Step to continue
Press Next Step to zero calibrate again

Fig.9 system zero calibration

Sheath resistance testing interface

Testing interface as below fig.10

Second step: Sheath resistance testing
Output voltage: 231.41 mV
Sheath voltage drop: -2 μV
Output current: 0.31 μA
HV zero setting: press HV on
Adjust voltage, current and press Next step until data stabilization

Fig.10 sheath resistance testing
First turn the HV adjust button to Zero position, press HV ON button to start HV output. Adjust the HV adjustment and Current adjustment button to make the output under constant current state. The current value should be as large as possible.
When the current value is stabilization, pressing Next step to test the cable sheath resistance. Interface as below fig.11

Second step: Sheath resistance testing
Output voltage: 3.2 mV
Sheath voltage drop: 3.53 μV
Output current: 80.35 μA

Testing… please waiting

Fig.11 sheath resistance testing
After testing, it will display the resistance of total cable sheath. Interface as below fig.12

Second step: Sheath resistance testing
Output voltage: 3.2 mV
Sheath voltage drop: 3.54 μV
Output current: 80.35 μAresistance of total cable sheath: 44mΩPress HV off, then press Confirm to continue
Press Last step to test again

Fig.12 sheath resistance testing
If want to test the resistance again, press Last step button.
Continue to test please first adjust HV adjustment to zero position, then press HV off button to close the HV output.
Device automatically tests the HV output state and if HV output, device will have audio alarming and lock next step operation.
When HV output close, press Confirm to continue.

Opposite terminal operation. Operation interface as below fig.13

Operation tips
Notify the opposition terminal to pull out the
Testing ground plug of the junction box.
Press Confirm button
when above step finished

Fig.13 operation tips
*According the operation tips, notify the staff to pull out the black clip from the junction box testing ground socket. After the staff in the opposition terminal /confirm/i, press Confirm button.

Faulty phase zero calibration.

Zero setting interface as below fig.13

Third step: Faulty phase zero calibration
Output voltage: 800.87 mV
Sheath voltage drop: 3 μV
Output current: 0.04 μA
Make sure device under HV off state
Press Next step until data stabilization

Fig.13 Faulty phase zero calibration
When faulty phase zero calibration, it is needed to close the HV output. If not, the device will automatically test, make audio alarming and lock next step operation. Device will begin zero calibrate until close HV output.
Make sure the HV off indicator lights and press Next step to begin zero calibration. Reference interface as below fig.14

Third step: Faulty phase zero calibration
Output voltage: 312.87 mV
Sheath voltage drop: 4 μV
Output current: 0.46 μA

Zero calibration… please waiting

Fig.14 Faulty phase zero calibration
After calibration, the interface is as below fig.15.

Third step: Faulty phase zero calibration
Output voltage: 0 mV
Sheath voltage drop: 0μV
Output current: 0μA
Zero calibration finished
Press Last step to continue
Press Next step to zero calibrate again

Fig.15 Faulty phase zero calibration

Near-end sheath resistance testing.

Testing interface as below fig.16

Fourth step: Near-end sheath resistance testing
Output voltage: 231.43 mV
Sheath voltage drop: -2 μV
Output current: 0.31 μA
Voltage zero calibration, press HV on o
Adjust voltage and current, press Next step until data stabilization

Fig.16 Sheath fault resistance testing
Set Voltage adjustment button to Zero position, press HV on button and adjust Voltage adjustment& current adjustment button to constant current state to make the current value as large as possible. Press Next step to test the near-end sheath resistance until data stabilization. Interface as below fig. 17.

Fourth step: Near-end sheath resistance testing
Output voltage: 10 mV
Sheath voltage drop: 3.22 mV
Output current: 86.23 mA

Testing… please waiting

After near-end sheath resistance testing, interface will display the sheath resistance and grounding insulation resistance. Refer below fig.18

Fourth step: Near-end sheath resistance testing
Output voltage: 10 mV
Sheath voltage drop: 3.22 mV
Output current: 86.23 mA
Near-end resistance: 37.34mΩ
Grounding insulation resistance: 0.115 mΩPress HV off to close the output, then press Next step to continue
Press Last step to test again

Fig.18 Sheath fault resistance testing
*According prompting, if want to test again please press Last step button.
Continue to test please first adjust the Voltage adjustment button to zero position then press HV off to close the HV output.
Device tests HV power state automatically. If doesn't close power, device will give audio alarming and lock the Next step operation. Press Next step to display testing result.

Testing result

Display the sheath-grounding insulation resistance, the sheath length resistance, the testing end-to-fault point sheath resistance and the ratio of distance of fault point-to-testing end to total cable. Interface as below fig.19

Testing result
Sheath to ground insulation resistance: 0.115 MΩ
Sheath full length resistance:
Sheath fault point to near-end resistance: 37.34 MΩ

Fig.19 testing result
After testing, please turn off the power and full discharge to all the sheath by discharging rod. Then remove the device wiring and opposite wiring.
*Attention:
If there is heavy interference, we suggest customer to test multiple result and use the averaging value.
If there are several fault points in the cable sheath, the testing resistance will has deviation. The tested result is near the most serious faulty point. And if want to pinpoint, we need to enlarge the testing range.
4.2Sheath fault pinpointing
FLD-66 has HV impulse output function which could be used in HV cable sheath fault pinpointing.
5.2.1 Wiring when pinpointing, refer below fig.20
Fig.20 pinpointing wiring
Tips:Connect the power line and HV output line of FLD-66Red clip connects with the faulty sheathRemove the green clip lineConnect the black clip and ground clip with grounding connectorGrounding the Protect ground Connect the discharging rod with the Testing ground lineMake the opposite-end safety!
5.2.2 Grounding checking
Power on and the power indicator will light. This means device is well grounding. If the indicator flickers, it means the resistance between testing ground and protect ground is too large. Then we need to power off device and check again.
5.2.2 HV power adjustment
Confirm the wiring is correct. After adopts safety precautions in the opposite-end, adjust the Voltage adjustment button to Zero position and press HV on button. Press Voltage adjustment and Current adjustment button to make the output current as large as possible. Press DC/Impulse button, the indicator of this button will flicker frequency and device will output HV impulse to offer signal for the pinpointing.

5.2.3 Pinpointing
Use FLD-86 digital step voltage pinpointing device to test the accuracy fault point after pre-locating.
After testing, please power off the device and fully discharging the sheath by discharging rod. Then remove the device wiring line and collect.
5.3.1 Wiring of FLD-66 DC voltage withstand testing. Refer below fig. 21.
Fig.21 DC voltage withstand testing wiring
Tips:Connect the power line and HV output line of FLD-66Red clip connects with the faulty sheathRemove the green clip lineConnect the black clip and ground clip with grounding connectorGrounding the Protect ground Connect the discharging rod with the Testing ground lineMake the opposite-end safety!
5.3.2 Grounding checking
Power on and the power indicator will light. This means device is well grounding. If the indicator flickers, it means the resistance between testing ground and protect ground is too large. Then we need to power off device and check again.
5.3.3 Confirm correct wiring and adjust the Voltage adjustment button to Zero position and press HV on button.
Press Voltage adjustment and Current adjustment button to make the output current as large as possible. If the DC/Impulse indicator flickers, press this button to DC work state. Then adjust the Voltage adjustment button according the DC voltage withstand testing.
5.Notify!!!
HV device! Operation according the manual. After use, fully discharging the cable to make sure safe.Don't disassembling device to avoid electric shock!!! There are HV stored energy storage unit in the device. Even device is power off, there are also possibility of electric shock!!!Contact with us if any device problem. Company introduction
1.certification
We have passed ISO9001:2015,CE,SGS approval and IEC report
2.Company profile
Tianjin Grewin is concentrating on transformers for 20 Years and complianted by ISO9001:2015,CB,IEC CB,CE etc.We're always pay great attention to its business philosophy "Quality and Honesty First".Grewin is specialized in the design and manufacture of wound components such as transformer,current sensors, chokes etc .windely used in communications,electronics,meters,industrial control,medical equipments and other fields.We are also a provider of power meters and instruments locators. 85% of its products exported to America, Europe, and Asia etc.We sincerely invite you to join us to create a bright future.

3.Terms of Shipment:
Within 10 working days after received related prepayment or L/C.
4.Payment terms:
(1)T/T 100% or 50% deposit by T/T in advance, balance amount to be paid 7 days before
delivery.
(2) By irrevocable L/C at sight, to be issued immediately against confirmed order.
(3)Payment by T/T, if order amount is less than USD 20,000.
5.Warranty:
(1)We provide 1 year warranty.
(2)If the product is defective, please notify us within 3 days of delivery.
(3)All products must be returned on their original condition, in order to qualify for a refund or exchange of goods
6.Why choose us?
Quality and honest first!
A. Flexible service for diffierent transformers with high efficiency performance.
B. Over 40 years experience of transformer designing and producing.
C.100% test of every single product we produce from incoming material checking.
D. UL, CE, ISO9001:2008
E. We offer custom-made transformers, OEM and ODM are welcome
F. We deliver the quality you expect at consistently competitive prices
G.Transformer quality lifetime:10 Years.
H.Specialty Sales service:5 -10 Years
7.Flow chart of trading activities:

NO
Step
Days need
1
Request for quotation
1 day
2
Making quotations
1 day
3
Offer and counter offer
3 days
4
Sending and receiving samples
3-10 days
5
Sample /confirm/iation
3 days
6
Placing a firm order
1 day
7
Paying and receiving the down payment
1-4 day
8
Factory production & Quality inspection
15-20 days
9
Paying and receiving the balance
4 days
10
Delivery of goods
1 days

8.contact
Tianjin Grewin Technology Co.,Ltd.
Tel: 86-22-84943756


Address: 2# MeiNian Plaza No.16 DongTing Road,Hexi Distr,300222,Tianjin China.