Show Floor Education Schedule

Tuesday, March 19, 2019

Time Event
1:00 pm – 2:30 pm
Conductor and OCPD Sizing

Level: Intermediate

Sizing conductors and overcurrent protection devices correctly is one of the most important steps for electrical safety. There are many factors that must be considered for conductor sizing such as conduit fill, ambient temperature, sun exposure and temperature rating of the terminals to which the conductors will be connected. In this 1.5 hour lesson we will review NEC requirements for conductor sizing, navigating multiple sections of the Code, and describing a step by step for procedure for correct conductor and OCPD sizing in PV system circuits.

Instructor: Karo Fernández, SEI

3:00 pm – 4:00 pm
PV System Types and Components

Level: Basic

Para aquellos haciendo su ingreso en la industria fotovoltaica, esta es una excelente clase donde comenzar. Obtenga una visión general de los diferentes tipos de sistemas fotovoltaicos y las opciones de configuración de sus componentes. Aprenda a identificar y describir las funciones básicas de los diferentes componentes en un sistema fotovoltaico. Adquiera mayor conocimiento y propiedad para caminar los pasillos de SPI con confianza y conversar con otros profesionales en la industria.

Instructor: Pablo Hernández, SEI

4:30 pm – 5:30 pm
Installation Requirements and the NEC

Level: Basic

This training will thread through many installation considerations and independent sections in different Chapters of the National Electrical Code (NEC) that should be taken into account when installing PV systems. You will learn about NEC requirements and recommended practices from experts in the industry, some specific for PV systems, others that apply to all types of electrical installations. Learn about standard requirements for electric PV installations to be safe, including topics such as listed equipment, workspace clearances and wiring methods.

Instructor: Karo Fernández, SEI

Wednesday, March 20, 2019

Time Event
1:00 pm – 2:30 pm
Site Analysis for PV Systems

Level: Basic

This training will cover the fundamentals of solar site analysis, covering the most important questions that need to get answered during a first site visit, and analyzing the solar resource available. This information is important to estimate how much PV can be installed in a site, and how much energy that PV array can produce. We will define what to observe, from the structural integrity of the roof and available roof disposition, to the existing electrical distribution panel. We will also explore the various site and shading analysis tools needed to accurately estimate how much energy a PV array will produce based on orientation, tilt angle, and other site characteristics.

Instructor: Karo Fernández, SEI

3:00 pm – 4:00 pm
Inverter Types, Topologies and Selection Considerations

Level: Intermediate

Interactive PV systems require inverters to change the DC power from the PV array to AC power, and synchronize it with the voltage and frequency of the power grid. Learn what is commercially available in the market, including inverter topologies and configuration options. You will learn topics from differentiation between functionally and solidly grounded systems to considerations for choosing components such as microinverters, DC-DC converters or string inverters and central inverters. Every inverter has advantages, limitations, design considerations and types and sizes of systems for which it is most appropriate, and in this lesson we will review details that a designer must consider to choose wisely.

Instructor: Karo Fernández, SEI

4:30 pm – 5:30 pm
Ground Faults and Ground Fault Protection

Level: Advanced

Ground faults are relatively common, and can be dangerous and difficult to solve. Interactive PV systems must comply with certain DC and AC equipment grounding requirements for correct operation of ground fault protection devices. In this lesson, we will first review terminology and configuration of equipment grounding in PV systems, including requirements and options for ground fault protection. We will analyze ground faults in PV systems, with special attention to ground fault blind spots in interactive PV systems with transformerless inverters, and how to retrofit technology for risk reduction.

Instructor: Karo Fernández, SEI

Thursday, March 21, 2019

Time Event
1:00 pm – 2:30 pm
OCPDs and Disconnects: Which, Where, and Why

Level: Intermediate

The requirements for disconnects and overcurrent protection in PV systems can be complex. Knowing when and where a disconnect is sufficient—or whether an overcurrent protection device (OCPD) is required—is crucial both for system safety and performance. For the NEC 2017 cycle revision a group of subject matter experts delved into updating and rewriting the code sections pertinent to this subject, giving them more clarity of intention and definition. Learn what these changes are, and what are the updated requirements for means of disconnects and OCPDs, and get a head start on what may be in the next revision of Mexico´s NOM-001-SEDE-2018.

Instructor: Karo Fernández, SEI

3:00 pm – 4:00 pm
Source Circuit Sizing for String Inverters

Level: Intermediate Level

Designing a PV system is more than just stating how many modules and what size inverter to use; there´s analysis behind determining how many modules and what configuration of a particular module can be connected to a specific inverter, base on local site conditions. Although there are tools from inverter manufacturers that do string sizing for you, a good PV designer must be able to perform the calculations to review and optimize the configuration options. In this lesson we study the complete procedure for sizing PV source circuits and understand the ins and outs of decision making that a design software cannot do for you.

Instructor: Karo Fernández, SEI