The High Voltage DC Dielectric Test Sets (70, 120 and 160kV), available from Macey's Electrical , provide a dependable, portable dc high voltage sources for checking the quality of electrical power cables, motors, switchgear, insulators, transformers and capacitors.
Each portable high voltage dc test set (heaviest is 73 lb, 32.8 kg) is comprised of two separate modules:
This module allows the operator to switch-select the appropriate voltage output range, adjust the output level and monitor both the applied voltage and 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. It 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. Each high-voltage module is a different size and weight to accommodate the rated output voltage.
The Biddle dc dielectric test sets are used to make proof tests and insulation tests on the following:
- 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 unit under test’s ability to withstand overvoltages such as lightning strikes and switching surges. The three models described for high voltage dc testing cover a range of output voltages that meet commonly specified ratings in 5-kV to 69-kV class cable. All are suitable for testing power cable, switchgear and rotating machinery in accordance with IEEE, IPCEA, NEMA and ANSI guidelines.
- Light weight
- Advanced performance with long-term reliability provided by filtered half-wave rectification
- Designed for maximum operator safety