WGAT The Wind Generator Insulation Resistance Monitoring System
Because of wind turbine engine room closed and compact size, generator temperature rise significantly, and its operation winding environment is very bad. In addition, doubly-fed induction of wind turbine rotor connecting the converter trigger harmonic current, lead to copper consumption, consumption of iron, and the stator winding up will be under a lot of impulse voltage, its insulation problems than general motors is more outstanding. For offshore areas, and the wind generator wet salt fog pollution is added to the test of insulation system coil. WGAT is a set of online automatic monitoring device of the insulation resistance, it is suitable for various types of wind generators, but convenient installation in generator control enclosure. WGAT can halt in generator state of the automatic detection and coil winding the whole insulation level, and in insulating bad triggered when the closure or remote alarm signal, avoid operation personnel will be put into operation the generator insulation fault, lead to start-up failure. Maintenance staff can do early overhaul of the plan, prevent accident's occurrence and avoid unnecessary downtime and spending expensive generator maintenance costs.
Main Function:
• Automatically or manually monitoring;
• The LED display (test, emergency instructions) adjustable alarm Settings, with the closure;
• C-relay output and manual reset function dc voltage test;
• Built-in welding wire protection and the current limit resistance test voltage output dustproof, and vibration and impact of the solid structure;
• 4-20 mA output/remote communication interface;
• years limited warranty optional alarm automatic reset;
• Optional installation megohmmeter of screen.
When the generator OFF, in the stator winding WGAT will put a limit on current, voltage constant dc voltage. Based on the comparison of the microprocessor automatic measurement circuit of winding leakage current. Device provide two levels of can adjust setting value, and according to the requirements of users, the factory set when the measuring value less than set alarm value, can send out the early warning, the alarm signal or closure signal to avoid existence of insulation fault generator is restarted. Hand-reset function in the unit after the repair defects was restored to normal condition, optional automatic reset function. WGAT high reliability and safety design makes it won't hurt by measuring the normal operation of the equipment.
WGAT small size can be convenient installation in the engine room control cabinet.
Already the U.S., Canada insurers laboratory accreditation
| Model | WGAT500 |
| Monitoring objects | wind driven generator |
| Work power | 115...265Vac, 50/60Hz, 0.05Amax. |
| Test voltage | 500Vdc@200μAmax. |
| Highest working | voltage 750Vrms |
| Alarm delay | 0...10s |
| Alarm relay | 5A@240Vac or 28Vdc, 1 C-type relay |
| Latching relays | 5A@240Vac or 28Vdc, 1 B-type NC relay |
| LED display test | Green, alarm: red (flash) |
| Control precision | 2% (full range) |
| Working temperature | -10℃ ... +60℃ |
| Dimension | H 70 × W 57 × D 114 mm |
| Weight | 0.45kg |
| Application standards | Fits UL 508 standard technical parameters and selection |
Offshore wind farm
Working with Enxco's wind turbine unit, Sigmatech is at the forefront of the new millennium in power generation. Enxco's wind turbine electrical solutions are designed to meet UL and CSA standards and to withstand harsh climates. Enxco's components increase reliability in the nacelle's control systems and in the base of the turbine's tower.