T-305E High Voltage Surge Generator
The T-305E high voltage surge generator, is used for locating high impedance and flashing faults on distribution cables. It works in conjunction with a cable fault locator for pre-locating the fault position and then with a pinpointer to find the precise fault location. It is applicable for different cable fault location techniques, such as the impulse current method (ICM) and the secondary/multiple impulse method (SIM/MIM).
(Top view of the control panel)
The equipment consists of a capacitor bank, an in-built voltage transformer and a rectifier, switchable to achieve different capacitance and voltage levels. When the unit is switched-off, its automatic and manual discharge facilities removes any residual capacitive charge. Additional Earth/Ground detection circuitry, blocks the operation of the unit if an effective Earth/Ground connection is not in place. These features, together with safety interlocking, ensure safe, reliable and easy-to-use operation.
The T-305E also provides repetitive discharges to facilitate pinpointing through the detection of the magnetic field and audio signals related to the fault discharging.
Technical Data
| Mains Supply | 220V ± 10% (110V available through step-up transformer) |
| Mains Frequency | 50/60Hz ± 20% |
| Maximum Power Consumption | 1500W |
| Operating Modes | Single pulse, Cyclic pulse, DC |
| Surge Steps (1024J) | 2µF (0 -32kV), 8µF (0 – 16kV), 16µF (0 -8kV) |
| Surge Steps (2048J) | 4µF (0 -32kV), 16µF (0 – 16kV), 32µF (0 -8kV) |
| Surge Voltage | 0 – 32kV; 0 – 16kV; 0 – 8 kV |
| DC Test (kV)/mA | 0…32kV / 48mA (1024J), 60mA (2048J) Negative polarity |
| Pulse Ratio (Seconds) | 4 – 30s |
| Mode Of Operation | DC / single impulse / multiple impulse |
| Discharge Period | 4 – 15 s. Continuously adjustable |
| Testing Method | ICM, SIM/MIM |
| Dimensions | 500 x 400 x 960mm (1024J)
500 x 400 x 1100mm (2048J) |
| Weight | 84kg (1024J)
95kg (2048J) |
| Operating Temperature | -10 – +50oC |
| Operating Relative Humidity | 20% – 90% relative humidity |
| Operating Atmospheric Pressure | 86 – 106kPa |
| ingress protection | IP21 (IP54 with optional cover) |
