hvhipot High voltage bridge for fault location in long cables

• Customization: Available
• After-sales Service: Yes
• Warranty: 1 year
• Model NO.: RE-FLB
• Test voltage: 0 ~ 15kV
• The maximum current: 30mA
• Power source: AC220V ± 10%
• Anti-interference ability: > 100VAC
• Weight: Around 12kg
• Transport Package: Plywood Case
• Specification: ISO
• Trademark: HVHIPOT
• Origin: Wuhan, China

Product Description

General Information

RE-FLB  Cable Fault Locating Bridge is based on the MURRAY bridge principle. It is used for positioning a variety of wire and cable breakdown point or no breakdown but low insulation resistance value defect point, and high-voltage cable protection sheath faults. It can also be used for cable factory to test cable defects.
The device using SMPS to form high-voltage constant current source, no-load voltage is -15000V, short-circuit current is 30mA. Using a high sensitivity amplifier and galvanometer to indicate the balance, with the proportional potentiometer to form a balanced bridge and placed at high potential. Test line is the specially designed dual-core high-pressure rubber cable, use four-terminal resistance measurement to avoid the error arising from lead resistance, the test line is reliable grounding through braid shield, the panel operation button at the earth potential, operate the bridge through insulation bar. High voltage constant current sources and bridges are integrated in a portable industrial chassis. Therefore, the device voltage is high, light in weight, easy to operate and safe to use.


It has three functions:
 

1. DC voltage test: the device can output 0 ~ 15kV DC voltage, can be used for cable DC voltage withstand test.
2. Burn through the point of failure: burn through and reduce the high resistance and flashover fault point resistance.
3. Fault pre-locating: Using bridge principle pre-positioning, four-terminal resistance measurement method to avoid the error arising from lead resistance.

It is particularly suitable for:
 

1. Installed cable high resistance breakdown point, in particular for the linear HV breakdown point which is difficult to burn to low resistance, such as cable middle connector linear high resistance breakdown.
2. Flashover breakdown point, after breakdown the constant current source can maintain the arc, a stable current through the bridge, the bridge has enough sensitivity.
3. Not yet breakdown but low resistance fault, for example, megger shows cable resistance is low, but under operating voltage the insulation defects can not be breakdown.

Due to the above characteristics, this product is favored by the following types of users:
 

1. Professional cable repair and testing teams specializing in cable location: such as cable repair and testing teams of large and medium-sized power supply bureaus and large power-consuming enterprises. This product can quickly locate the approximate location of most cable breakdown points. When used in conjunction with wave reflection and locating instruments, it leverages the strengths of each method, making location faster and more reliable.
2. Small users: such as small power supply bureaus and medium-sized power-consuming enterprises. These typically have a small number of cables, clear routes, short lengths, and limited failure frequencies. Equipping them with a complete set of wave reflection locating instruments is expensive and requires highly skilled and experienced personnel, making it less than ideal. This product, with its lower price and ease of operation, is a better choice for everyday needs.
3. Cable manufacturers: Within the factory, it can be used to locate various cable breakdown points. With the optional digital capacitance meter, it can pinpoint the break point. The equipment is lightweight and easy to carry to the site for cable location services.

Specifications
 

Test voltage	0 ~ 15kV, negative high voltage, continuously adjustable
The maximum current	30mA
The test ratio accuracy	± (0.2% • L ± 1) meters
Output voltage of outer sheath burn through	0 ~ 15kV, continuously adjustable
Output current of outer sheath burn through	30mA
Power source	AC220V ± 10%
Anti-interference ability	> 100VAC
Weight	≤ 12kg
Dimensions	L450mm × W330mm × H320mm