Portable DC High Voltage Generator for Cable Insulation & Leakage Current Test

Portable DC High Voltage Generator for Cable Insulation & Leakage Current Test

Product Description

High voltage DC generator provides the most dependable, portable DC high voltage sources for checking the quality of zinco xide arrester, magnetic blow-out arrester, power cable, generator, transformer, and switchgear. It is widely applied  in electric power department, scientific research unit, railway station, power plant, chemical plant, etc. For the DC hipot tester, it has two functions: For the DC high voltage test and DC leakage current test.
Product Alias

Cable Fault Thumper / Cable Fault Pinpointer / HV Pulse Generator for Cable Test
Features

1. High accuracy and correct measuring. Voltage and current meter all have digital display, with voltage resolution 0.1kV, and current 0.1uA. Voltage value applied to load test object is displayed directly through voltmeter on control cabinet, which needn’t to be connected with voltage divider on the outside when using, and lead connection is easy

2.High stability in voltage regulation, smooth voltage regulation in full range. Voltage regulation of output adopts import single multi-rings potentiometer with rough adjustment and fine adjustment. Accuracy of voltage adjusting is better 0.1%, accuracy of voltage and current measuring is less than 1.0%, and ripple factor is better than 0.5%.

3.Negative polarity output, zero start, continuous adjustable, having the function of over voltage, over current, zero returning and ground protection.  Operation is safe due to strong function of auto protecting circuit, technical index of all kinds surpassing industry standard and similar products.

Product Parameters

Application Scenarios

FAQ

Question 1: No surge pulse output after power on
Customer: The machine powers up normally, but there is no high voltage surge pulse output when operating. What are the possible reasons?
Manufacturer: First check the power supply voltage and confirm the power cord and power socket are in good contact. Inspect the output high voltage cable for breakage, aging or poor connection at terminals. Make sure the safety interlock cover is fully closed, as the interlock protection will cut off high voltage output if open. Check whether the internal protection circuit has triggered due to previous short-circuit impact; power off the device and wait for 10 minutes for full discharge then restart. If the issue remains, stop testing immediately and contact technical support. Never disassemble the high voltage chamber by yourself, residual high voltage can cause fatal electric injury hazard.

Question 2: Frequent overcurrent protection triggering during test
Customer: Overcurrent protection keeps activating right after surge output starts, and the generator stops working automatically. How to troubleshoot this issue?
Manufacturer: Confirm that the tested cable insulation is not in permanent short-circuit state which exceeds the device load range. Check high voltage connecting wires for mutual contact or short to ground. Verify the grounding wire is firmly connected to reliable earth point with low grounding resistance. Reduce the output voltage level appropriately for trial test. Do not repeatedly trigger high voltage output continuously in a short time, this will heat up internal components and trigger protection. If protection still trips under low voltage setting, stop operation and send the instrument for professional inspection.

Question 3: Weak or indistinct thumping sound at fault point
Customer: Surge output works normally, but the thump sound at cable fault position is too faint to identify the exact spot. What can we do?
Manufacturer: Check if the fault resistance is too high, high resistance faults usually produce weaker acoustic signal. Increase the output voltage gradually within the rated range of the equipment. Confirm good contact between ground return wire and earth, poor grounding greatly reduces pulse energy. Adjust the surge discharge interval properly to get clearer acoustic shock. Avoid testing in environments with strong background noise. You can cooperate with cable route tracer to confirm cable path first before pinpoint work. Do not exceed the maximum rated voltage of the instrument.

Question 4: Meter reading abnormal when adjusting output voltage
Customer: The display meter reading jumps randomly and cannot stabilize when adjusting the high voltage output knob. Is the instrument faulty?
Manufacturer: Check whether the high voltage output line is suspended near metal objects, stray capacitance will interfere voltage sampling. Confirm all connection terminals are tightened without loose contact. Ensure the equipment is placed on dry insulating surface, damp environment will bring interference and unstable readings. Power off and clean dirt and moisture on terminal insulation surface. If reading still fluctuates after these checks, stop using the device and contact after-sales team for calibration and maintenance.

Question 5: Instrument alarm after long time continuous working
Customer: After several consecutive pinpoint tests, the device sends an alarm and refuses high voltage output. What causes this alarm?
Manufacturer: This is over-temperature protection triggered by heat accumulation of internal power components. High voltage surge generator cannot run continuously for long cycles. Turn off the power supply and let the instrument cool down for at least 30 minutes in ventilated place. Do not cover the equipment during working, keep ventilation slots unblocked. Arrange intermittent testing mode for field jobs. If alarm appears after only a small number of shocks under normal ambient temperature, internal circuit may have failure, stop using it and do not continue high voltage operation.

Question 6: Shipping Method
Customer: If we place an order, how do you typically ship the goods? Will there be any issues with transporting bulky items such as reactors?
Manufacturer: We default to using dedicated logistics lines or brand-specific express shipping services; small-sized main units and accessories may also be shipped via standard courier services. Large items, such as reactors and excitation transformers, are packed using wooden crates or wooden frames for reinforcement to prevent bumps and moisture exposure during transit; a packing list is included with each package to facilitate item-by-item counting for you. Logistics costs are typically determined by both parties in accordance with the contract terms; after shipment, we will send you both the tracking number and the carrier's contact phone number for easy tracking.If your project site is remote or if delivery to the site is required with a specified logistics company, please inform us in advance when placing your order; we can then coordinate and arrange accordingly.
Question 7: Delivery Lead Time
Customer: Our project is under tight deadlines; how long will it take for the order to be shipped after we place it? Can we request expedited shipping?
Manufacturer: Standard specifications – stock available; typically delivered upon receipt of the order. Orders can be shipped within [X] working days; for non-standard products requiring customized voltage levels, capacities, or reactor combination configurations, the production cycle typically ranges from [X] to [Y] days.The delivery time will be approximately 7-15 working days; the specific timeline shall be subject to the sales confirmation provided upon order placement. If your project has a tight schedule, please inform us of the latest expected delivery date before placing your order; we will first verify the production schedule and inventory status, and where possible, will coordinate expedited production and prioritize shipment. However, it is recommended to allocate sufficient transit time for logistics to avoid delaying on-site testing.
Question 8: After-sales Service and Warranty
Customer: What is the warranty period for this equipment? If any issues arise during on-site use, how will your after-sales service respond?
Manufacturer: We provide a two-year free warranty on the entire unit and lifelong technical support services. During the warranty period, if issues arise due to defects in the equipment itself, we will provide free repair or replacement of components; when problems occur on-site, we commit to responding within 24 hours; most wiring and parameter configuration issues can be resolved through remote guidance via video or telephone; for cases where an on-site visit is necessary, we will arrange for our technicians to arrive at the location to resolve the issue. After the warranty period expires, we still offer repair services, with spare parts supplied at cost price for the long term, and software updates provided free of charge for life. Upon delivery of the equipment, we also offer free operational training (video operation guides)to ensure that your testing personnel can operate the equipment independently and proficiently; should you have any further questions, please feel free to contact our dedicated after-sales hotline directly.
Question 9: Shipping methods for each region (Sea freight)
Customer: Our projects are distributed across several states, and our procurement volumes are substantial; are the shipping methods consistent across all states? How is the delivery time calculated?
Manufacturer: The specifications are identical; however, it should be specifically noted that this equipment set is large in size and heavy in weight—components such as the reactor and excitation transformer are all classified as heavy components. Therefore, regardless of which state or region the shipment is destined for, we will uniformly utilize sea freight transportation. The packaging employs export-grade wooden crates with reinforced structures, along with moisture-proof and rust-proof treatments; the design of these wooden crates is optimized for long-distance sea transport and multiple lifting and transshipment operations. Upon arrival at the destination, simply unpack the goods and conduct an inspection before putting them into use. Regarding delivery time, the sea freight transit period depends on the port of destination: near-sea routes are generally faster, whereas ocean routes may take longer; the exact number of days will be confirmed based on the shipping schedule specified in the bill of lading. We have a dedicated freight forwarding agency to handle booking of shipping space, customs declaration, insurance, and other related procedures; once the vessel departs, we will send you documents such as the bill of lading and the packing list, enabling you to arrange for the receipt of goods at the port of destination and their inland transshipment in advance.

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