High voltage DC dielectric test sets in 70kV, 120kV and 160kV capacities are now available from Macey's Electrical .
The high voltage DC dielectric test sets provide dependable and portable DC high voltage sources for checking the quality of electrical power cables, motors, switchgear, insulators, transformers and capacitors.
Each portable high voltage DC dielectric set is comprised of two separate modules:
The control module allows the operator to switch-select the appropriate voltage output range, adjust the output level and monitor the applied voltage as well as leakage current at a safe distance from the high voltage being delivered to the load under test.
No voltage higher than input AC power is present in the control module.
High Voltage Module
An air-insulated design receives its instructions from the control unit and generates the DC high voltage that is delivered to the load under test.
Although a different control module is used with each of the three models, they are all the same size and weight. On the other hand, each high voltage module is a different size and weight for the three models to accommodate the rated output voltage.
Key features of portable DC dielectric sets
- Lightweight air-insulated high voltage models
- Advanced performance with long-term reliability provided by filtered half-wave rectification
- Designed for maximum operator safety
Biddle DC dielectric test sets are used to make proof tests and insulation tests on:
- Electrical power cables
Both types of tests are performed by applying controlled high voltages to the unit under test at or above insulation system operating level.
Measuring the leakage current helps determine the ability of the unit under test to withstand overvoltages such as lightning strikes and switching surges.
The three models with varying capacities cover a range of output voltages that meet the most commonly specified ratings in 5kV to 69kV class cable.
All DC dielectric test sets are suitable for testing power cable, switchgear and rotating machinery in accordance with IEEE, IPCEA, NEMA and ANSI guidelines.
Proof testing is used for acceptance testing of newly installed cable and maintenance testing of aged and/or repaired cables.
For the proof test, the unit under test will either withstand the test voltage or break down providing the user with a clear answer.
This is essentially the same as the proof test performed by Megger impulse generator systems within voltage limitations.
When modified for use with Biddle accessory impulse generators, the DC dielectric test sets provide an economical means of locating faults.