Buying More for Your Money

1. Better engineered assemblies.

Gilbert Electrical Systems (GES) has the capabilities of system engineering as well application engineering. We have a staff of engineers and design people that understand system and application needs. This knowledge and discipline is applied to every job in detail. Capacitor and filter projects are our forte and not an aside to our business. This is shown in our commitment to proper and complete details to our packages. Our assemblies do not take shortcuts to cheapen the product.

2. Better-manufactured packages (Quality.)

Gilbert Electrical Systems (GES) assemblies are welded units of 11-gauge steel. The highest quality components are used in our assemblies. Rockwell controllers, Cooper Power Systems type EX-D^® capacitors in our filters and ABB breakers and switches. Copper bus and cable, porcelain insulators are only used in our assemblies.

Proper clearances are used per NEC 490.24 and IEEE C37.20.

3. Quality paint system.

Gilbert Electrical Systems (GES) has introduced the state of the art powder coat paint system. It is the Alesta^® Powder coatings by Du Pont. The system is designed to provide a tough, durable and highly decorative finish. The paint system meets the latest IEEE C57.12.28. Alesta^® powders is UL recognized for steel enclosures for outdoor use.

Click Here for additional details of the powder coat paint system.

4. Properly designed Iron core reactors (single and three phase units)

Gilbert Electrical Systems (GES) reactors are built and designed in house. True 75 KVBIL reactors for 5KV systems and 95KV BIL reactors for 15KV systems. We do not need base insulators to obtain higher BIL for the reactors.

GES adds extra margin in the design of the current ratings for our reactors. IEEE Std 18 states the capacitors are to be capable of 135% of rated reactive power. This is 15%tolerance, 10% over-voltage and 10% harmonics. With a provided current spectrum, this will cover the 10% for the harmonics. However, 15% tolerance and 10% over-voltage remain. Therefore, we include 125% to the fundamental current of the reactor than add the harmonic currents to complete the reactor design.

5. Proper fusing.

Gilbert Electrical Systems (GES) is well aware of fusing issues in ungrounded wye applications in particular. Many vendors ignore IEEE C1036 section 5.1.2 and table 7 and do not meet this standard. Potential capacitor tank rupture increases drastically with improper fusing and severe damage can occur.

GES uses full voltage fuses for floating systems and is cognizant of the needed discharge required into the failed capacitor to clear fuse; preventing tank rupture.

Click Here for additional information regarding fusing issues in ungrounded wye applications.

6. Proper unbalance consideration.

For filter banks and ungrounded banks an unbalance detection scheme should be included. Unbalance conditions in a filter bank will change the detuning point.

In ungrounded wye banks the neutral will shift in the phase where capacitor(s) fail causing an over-voltage on the remaining capacitors in that phase.

For multiple step banks some vendors will quote one scheme for the whole bank, not one for each step. This will cause inconveniences and depending on the size of the steps may inaccurate when sensing unbalance conditions.

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