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Technical Questions

What technology does HES employ to achieve its energy savings and power quality improvements?

What is the Hershey System and how does it work?

What is the design of the Hershey System and what types of electronic components does it contain?

Is the Hershey System a UPS?

Is the Hershey System a power factor correction device?

What characteristics do you measure in a Power Quality Audit?

Will the Power Quality Audit interrupt production?

Who will install my system?

Will installation of your system interrupt production?

Who will maintain my system?

What happens if I change the loads in my electrical network before installation? After installation?

Will the Hershey System work with capacitor banks?

Do your systems work with high voltages?

If we have more than one transformer in our facility, how many systems do we need?

If anything happens to the Hershey System, will we lose any production time?

What happens if some of the components in the Hershey System fail?

What is the life expectancy of the Hershey System?

 

 

What technology does HES employ to achieve its energy savings and power quality improvements?

Hershey Energy Systems employs a unique power quality system to achieve energy savings and power quality improvements in a customer's facility. This technology can be easily installed in a facility and provides the following benefits:

  • Improved Production Efficiency via improved reliability in electrical motor and other equipment operation.
  • Electrical Equipment Protection from destructive forces such as lightning, voltage surges, transients and harmful effects produced by broadband harmonics. This reduces electrical equipment replacement and maintenance costs.
  • Total Electrical Utility Cost Reduction (kW, kWh, and kVAR) by approximately 15%. These savings provide a typical system cost payback of approximately 2 years.

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What is the Hershey System and how does it work?

The Hershey System is an energy saving and power quality system. It saves up to 15% of a customer's electric utility bill with paybacks in the 2 year range. The standard system includes the following features:

Standard Features:

Voltage Improvement and Stability - The Hershey System improves and stabilizes voltage supplied to the load which reduces heat generation in motors. This creates energy savings, improved productivity and increased equipment efficiency and longevity.

Three Phase Balancing - The Hershey System reduces phase current and balances the load over the three phases. This has the effect of reducing negative voltage sequences and circulating currents and results in reduced equipment maintenance and failure.

Surge and Transient Protection - The Hershey System protects against voltage surges, spikes and transients that are harmful to plant equipment.

Broadband Harmonics Reduction - The Hershey System filters the broadband harmonics that are harmful to plant equipment.

Power Factor Improvement - The Hershey System reduces reactive and apparent power through a damped response thereby improving the electrical network's efficiency and eliminating charges for low power factor. Line losses (I2R) are also reduced. Power factor is optimized using substantially fewer capacitor banks than normally needed, without incurring any harmful capacitor side effects.

Capacity Release - The Hershey System releases kVA capacity on the transformer which allows for additional loads without requiring oversizing of the transformer or electrical switchgear.

Optional Features:

Brownout Protection - During times of low line voltage, this feature will maintain and increase voltage over that supplied by the transformer.

Intermittent Supply Failure Protection ("One second carry through") - This feature will supply continuous voltage during short duration (59/60 cycles) intermittent supply failure and line switchings. 

Specific Harmonics Filtering - A system equipped with this feature will filter specific and multiple harmonics to a non-destructive level. 

Phase Loss Synthesis - This feature allows the Hershey System to detect the loss of a phase and manufacture the lost phase from the remaining two. This ensures a continuous supply of power to the plant.

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What is the design of the Hershey System and what types of electronic components does it contain?

The Hershey System is designed in a one, two or three stage switchboard housing each of which contains a combination of electronic components which include: Inductors, Capacitors, Resistors, Filters, Contactors, Breakers, Fuses, Self Diagnostic Feature (SDF) units, and Regulator Boards. The number of stages of the unit is determined by the kVA rating of the transformer. These features are made possible by the unique system design and its Ladder Logic response coming from the microprocessor controlled regulator board.

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Is the Hershey System a UPS?

No. The Hershey System is not a UPS. However, when it is installed in conjunction with UPS it will enhance the system and UPS operation.

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Is the Hershey System a power factor correction device?

No. The Hershey System is not a power factor correction device, although it does improve power factor close to unity. It is a comprehensive power conditioning system that optimizes all of the electrical characteristics in a transformer network including: voltage improvement and stability, three phase balance, voltage surge, spike and transient protection, harmonic reduction, power factor improvement and capacity release.

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What characteristics do you measure in a Power Quality Audit?

During our Power Quality Audit the following characteristics are measured for each main transformer network in your facility:

Load Factor - Load factor at the time of measurement

Voltage Condition - Phase balance and voltage drop

Transformer Full Load Current - Transformer max. continuous current capability

Transformer Loading - % of transformer load at time of measurement

Transformer Highest Loading - % of highest avg. stable operating load

Apparent Power (kVA) - Based on operating load at the time

Real Power (kW) - Based on operating load at the time

Reactive Power (kVAR) - Based on operating load at the time

PFCC Reactive Power (kVAR) - Corrective reactive power at the time

Total Harmonic Distortion (V&I) - Based on operating load at the time

Facility's Operation (%) - Based on load factor/load profile

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Will the Power Quality Audit interrupt production?

No. In fact, the closer your facility is to normal operation during the Power Quality Audit, the more accurate the results will be. We require that your plant is operating at a minimum of 70% of the normal load during the Power Quality Audit. Please note that under normal conditions, no interruption of business will be necessary to perform the audit activity. However, if your facility has a high power condition (i.e., Voltage in excess of 600V), use of special equipment will be required to enable monitoring and accurate testing. A short power shut-down or interruption will be necessary for test equipment connection and disconnection.

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Who will install my system?

Hershey Energy has partnered with highly skilled Strategic Alliance Contractors in each of our territories in order to ensure proper installation and operation of our equipment. These contractors will be responsible for installation of the Hershey System unless a customer's situation warrants otherwise.

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Will installation of your system interrupt production?

Generally for safety reasons, shutdown is required for about one hour during initial installation of the Hershey System. However, in special situations, if there are adequately sized breaker(s)/disconnect(s) available it is possible to connect the Hershey System without a shutdown. Please Contact Us for more details.

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Who will maintain my system?

The Strategic Alliance Contractor that installed the Hershey System will perform any required upgrades and/or maintenance. This ensures our customers a continuity between installation and maintenance of the system. Hershey Energy has developed a Performance Assurance Plan (PAP) to provide for regular maintenance of the Hershey System. This program is crucial to providing our customers with the maximum benefits that the Hershey System offers. Please refer to the Performance Assurance Plan section of The Hershey Program for more information, or Contact Us to speak to a representative about the details of this program.

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What happens if I change the loads in my electrical network before installation? After installation?

The Hershey System is designed to address the normal load of a facility at the time of measurement. Measurements for system design are taken during the Link Analysis portion of our program. (Please read the "Link Analysis" section of The Hershey Program for more details). If the measured load increases beyond the design criteria, you must notify Hershey Energy of this change in your electrical network. We can then prepare a quote to upgrade the Hershey System to address the plant's increased load. If you decide not to upgrade the Hershey System, the original savings will still be available; however, no savings will be realized on the additional load.

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Will the Hershey System work with capacitor banks?

Hershey Energy Systems does not recommend the use of power factor correction capacitor banks in conjunction with our system. As stated previously, the Hershey System will improve power factor to between .95 and unity, without the generation of destructive harmonics that is typically seen in capacitor bank installations.

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Do your systems work with high voltages?

Yes. The Hershey System can be designed for voltages up to 345kV. However, the guaranteed and expected savings generated by medium and high voltage systems (4160V and higher) is less than those generated by lower voltage systems.

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If we have more than one transformer in our facility, how many systems do we need?

The Hershey System is a centralized power quality and conditioning system. As such, a typical installation requires one mainframe unit for each main transformer in a facility. Additional satellite units may be needed to address power quality concerns at the major load centers on a given electrical network. This will typically occur at specific motors in the network such as electrical motors, induction furnaces, electric welding equipment etc. with a load that is 200 amps at 480 volts or greater.

The exact number of mainframe and satellite units to be used for a specific installation is determined during the final design of the system. This design phase begins once the customer has agreed to purchase the Hershey System. During this design phase, the Strategic Alliance Contractor (SAC) will re-visit the client site to take final measurements of the electrical networks in question. This part of the design phase is referred to as the Link Analysis. (Please read the "Link Analysis" section of The Hershey Program for more details). 

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If anything happens to the Hershey System, will we lose any production time?

No. Because the Hershey System is installed in parallel on your electrical network, and because of its self diagnostic feature (SDF), any failure of a given component in the Hershey System will not cause disruption to your production activities.

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What happens if some of the components in the Hershey System fail?

Due to its modular design, each stage of the Hershey System can operate independently from the other stages. Therefore, if a component fails in a given stage, that stage will take itself off-line while the remaining stages continue to function normally. The LCD display panel will notify you of the failure in any stage so that you may contact a Hershey representative and make the necessary arrangements for replacement parts and installation.

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What is the life expectancy of the Hershey System?

The nominal life expectancy of the Hershey System is 20 years.

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If you have a question that is not answered here, please do not hesitate to Contact Us at our central office in Rochester, NY where we will gladly answer any questions that you may have regarding our company or our services.

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