The MAT applies a current limited, fixed D.C. voltage to the windings of the motor when it is idle. It measures the leakage current to ground, which is monitored by a solid state comparator circuit. The comparator has the capability of providing two adjustable set points which are preset at the factory to customer specifications. When the set points are exceeded the MAT can be programmed to first send a signal (pre-alarm) and then followed by locking out the equipment from being operated (optional). The device is equipped with a remote LED display and switch assembly which allows the unit to be monitored and operated from the low voltage panel, for added personnel safety. The color coded meter indicator also makes it easy to determine the exact condition of the winding insulation. The MAT is safe and reliable and will not impair the normal operation of the equipment being monitored.

Model	MAT5000	MAT500
Monitoring objects	4160...7200V motors	380V motors
Work power	115...265Vac,50/60Hz,0.15Amax.	115...265Vac, 50/60Hz, 0.05Amax.
Test voltage	5000Vdc@350μAmax.	500Vdc@200μAmax.
Highest working voltage	7200Vrms (Opt. 13.8kV)	600Vrms
Warning relay	5A@240Vac or 28Vdc,C-relay	5A@240Vac or 28Vdc,C-relay
Alarm/latching relays	5A@240Vac or 28Vdc,C-relay	5A@240Vac or 28Vdc,1 NC-relay
Instrument	1% megohm meter	NA
LED display	Power supply: green, test: yellow, warning: yellow (flash), alarm: red (flash)	Test: green, alarm: red (flash)
Control precision	1%(full range)	2%(full range)
Working temperature	-10℃ ... +60℃
Shape dimension	H 292 × W 95 × D 241 mm	H 70 × W 57 × D 114 mm
weight	3.4kg	0.45kg
Application standards	UL 508 standard

Utilities
      Dave Mesquita, Maintenance Manager, Southern California Generation Plant
      A year ago we installed (28) MAT5000 units on critical 4160 V motors and MAT500 units protecting (59) critical 480 V motors in our plant. To date we have already identified (2) 4160 V motors and (2) 480 volt motors with ground issues and were able to prevent them from failure. These systems work, they save the company money, and the minimize forced outages. We are very pleased with all the benefits and added plant safety they provide to our facility.


Oil Industry
     Shell Offshore
      Samuel Torres, Electrician, Shell Offshore -Perdido Platform
      We have installed your MAT systems on our (6) main turbine generators on the Shell Perdido platform, operating in 8000 feet of water off the Gulf of Mexico. Since the units were installed almost two years ago they have saved us countless man hours with the automatic testing capabilities and have allowed us to prevent several generators from failing on start up. We are using these units on several of our other platforms in the Gulf with the same success.


     Apache Corp
      Carlos Cerna, Automation Foreman, Apache Corp, Area 7 Gulf of Mexico
      A few years ago after experiencing some generator failures, due to moisture problems, on our Offshore platforms we purchased SigmaTech MAT systems to help us combat these problems. We installed the MAT systems on the 4 Megawatt Gas Turbine Gensets on our platforms GI-116, ST-308 and EI-346. Since installing the MAT systems we have saved several generators from failing on start up and were able to then dry out the generators in place and continue operations with out any unexpected downtime. The maintenance cost savings and increased platform uptime have more than paid for the initial system costs. In addition we are now able to safely bring a platform online, after a hurricane evacuation, quickly and safely without the danger of blowing a generator. I am also very pleased with the ability to safely monitor our generators condition, 24/7 whenever they are down, without having to do the testing manually by hand. Keeping our electricians out of the high voltage cabinets increases our platform safety for our maintenance crews which is an important added benefit of the systems. I plan to add more MAT systems to the other platforms in my area to protect the generators and critical motors as well.


Wastewater
      Tom Steinbach, Operations Manager, Oconomowoc Water Treatment Plant
      I learned about MAT at a trade show about 10 years ago. It seemed like a useful device so we bought 3 MAT units and installed them on those motors that are most critical to our operation. With a facility such as ours, dealing with damp conditions and the damage it can cause is a real concern and can be very costly. I can’t tell you how happy I am with this product. Over these 10 years MAT has prevented damage to expensive and critical motors operating pumps and blowers at our treatment plant. It has also saved us time by not having to change out damaged motors. We operate our PM program in a very proactive manner and the efficient operation of our utility is reflected in user rates that are near the lowest in the area. We consider MAT to be an important part of that PM program.


Petrochemical
      Ricky Loupe, Electrical Staff, Formosa Plastics
      We installed MAT5000 systems on (9) of our 4160 volts motors operating critical York chiller compressors in our Baton Rouge Plastics facility. The service and assistance we received from SigmaTech during the installation and start up of the systems was exceptional. So far in the first year we have caught two ground problems due to moisture on the windings and prevented an imminent motor failure.
      We like the fact that we have eliminated the chore of manually testing these motors before each start up which is mandated by the high humidity environment that they operate in. These systems have already paid for themselves and I am confident they will continue to save the company maintenance dollars for many years to come.