html{display:none} FAQ | Schweitzer Engineering Laboratories


75 Results Found Current Page: 1 of 1
How do I apply for a position at SEL?

We ask all candidates to submit their resumés through our website:

  1. Select Apply Now from the menu.
  2. Click the Search button in the middle of the screen on the right (or if you would like to specify a job category or location, do so, then click Search).
  3. Select the position title that interests you. Then select Submit Your Application.
  4. Log into your existing account, or create a username (your email address) and password. After logging in, you can upload your resumé and cover letter to complete the application process.
Can candidates share email addresses?

No, please be aware that each candidate must have a unique identifier (email address). Therefore, email addresses cannot be shared among applicants. If you do not have an email address, you can create one using one of the many free email accounts available online.

Can I apply for more than one position?

Yes, SEL encourages candidates to apply for each position for which you believe you are qualified. You will be considered for each position individually.

May I submit an individual resumé and cover letter for each position I apply for?

No. Unfortunately, at this time, you can only submit one resumé and cover letter. However, you can update your resumé and cover letter at any time.

Do I need to fill out a formal application? If so, where can I get one?

No. Right now, all we need is your resumé. SEL does not require a formal application with work history and background-check authorization until later in the hiring process.

I have submitted my resumé online. How long will it take until I am notified of my status?

Generally, you will receive an update regarding your status within one to two weeks after submitting your resumé. However, this can vary, depending on the nature of the position.

What should I do if I haven't received a response from SEL?

SEL sends an initial email response to all applicants at time of resumé submittal. If you did not receive this email, please check your SPAM filter and make sure your system is not blocking emails from SEL. It is important that you ensure your receipt of this email as SEL will communicate future position updates via email. If, at anytime throughout the hiring process, you have questions regarding your status please feel free to call our Human Resource Department. We can be reached at (+1.509.334.8060).

I’ve lost the formatting to my resumé. How can I correct it?

Please note that HTML formatting (such as bullet points) in your resumé may be lost and affect the appearance of your resumé. We highly encourage you to limit or refrain from using such formatting as it may affect our ability to thoroughly evaluate your qualifications. Using basic formatting or plain text is recommended.

I need to update my profile (phone number, address, resumé, etc.). Can I do this?

Yes. Log into your account by clicking the Apply Now tab in the navigation menu on the left. Enter your username (email address) and password, and click Login. Once you make the appropriate updates to your profile, click Submit Form to save your changes.

Will you get back to me when I am no longer being considered for the position?

Yes, SEL will get back to you via email as soon as you are no longer being considered for a position. 

Will you contact me if a new position opens up that matches my area(s) of interest?

Yes. After you log into your profile and sign up for daily or weekly email notifications, we will inform you of new careers that are posted on our website based on your areas of interest. We also encourage you to monitor our website for new positions that open up.

What can I expect from an internship with SEL?

In addition to the opportunity to work with the industry's brightest engineers, marketers, and business professionals, internships at SEL provide flexible work schedules, varying lengths, and varied required hours based upon the student's individual circumstances and the hiring manager's needs. Interns can expect competitive hourly wages individually based upon many factors. The SEL internship program is very successful in converting interns into regular, full-time employees.

What makes an internship different from a regular job?

Internships at SEL are different from regular, full-time positions on a variety of levels. Interns are considered regular, temporary employees and are given the opportunity to work part-time while attending school and full-time during the summers. Interns are given tasks with mentors and teams that will enhance their academic experience. Internships provide an opportunity for the company and the student to have a long-term interview with each other.

What is the SEL policy on smoking and tobacco use?

SEL maintains a tobacco-free workplace. Therefore, if employees smoke or use tobacco-based or tobacco-resembling products (e.g., cloves or electronic cigarettes), they must ensure that they and their clothing do not smell of smoke or tobacco, and they must not use any tobacco-based or tobacco-resembling products anywhere on SEL property, in its facilities, in SEL vehicles, at SEL-sponsored events, in personal vehicles in SEL parking lots, when using personal vehicles for SEL purposes, or with SEL customers or vendors at any time or location, except where this policy is prohibited by local law.

What is the SEL policy on drugs and alcohol use?

SEL maintains a drug- and alcohol-free workplace. The possession, solicitation, use, or trafficking of alcohol or drugs, including marijuana, in the SEL workplace or while representing SEL in any capacity at any time is strictly prohibited.

How can I find the building I'm looking for at the Pullman corporate headquarters?

Consult our campus map or contact your recruiter, who will be happy to help provide directions.

Pullman Campus Map
What does CL2/CL10/CL20 mean?

The SEL-735 Power Quality and Revenue Meter offers a standard current measurement range from 1 mA to 22 A. You therefore do not have to specify a CL2, CL10, or CL20 meter thanks to the wide dynamic measurement range. This model’s Slot Z Current and Voltage Inputs option is titled Current Class CL2/CL10/CL20, Optimized for Low-End Accuracy. The SEL-735 also offers a fault recording measurement range from 5 mA to 100 A. This option is titled CL10/CL20, Optimized for 100 A Fault Recording.

Why is SEL building an antenna?

SEL builds products for critical infrastructure. This means that SEL products need to be reliable in all situations. The antenna is the most important part of the timing system, because satellite-synchronized clocks need GNSS signals to function reliably. Antennas are susceptible to lightning, weather, and other external factors, making them the most likely point of failure for a timing system. With this in mind, SEL chose to build a more reliable, higher-performance antenna than what can be purchased off the shelf.

Why should I invest in a high-performance antenna? Can I just risk it and pay for the replacements when failures occur?

By investing in a high-performance antenna you can avoid these hidden costs and reduce your total cost of ownership:

  1. Loss of time during the antenna replacement. Precise time is becoming a requirement for critical infrastructure applications. Time-dependent applications could be compromised after the antenna failure, but before the antenna replacement.
  2. Labor and resources associated with antenna replacement. Antennas are often mounted high enough to require a bucket truck in order to replace them. These replacements take time and money. Damage to the attached equipment. Surges that occur at the antenna can propagate through the antenna and damage the attached device. An antenna with better surge immunity will better protect the clock itself.
  3. Buying a cheap antenna may seem like a good idea at first, but after factoring in antenna failures, the cost of ownership is far less with a reliable antenna like the SEL-9524.
What technology differences make SEL’s antenna more reliable?

The SEL-9524 was designed to avoid common pitfalls seen in other antennas. It was developed in our R&D facility that designs products with design lives of more than 20 years. SEL’s manufacturing also provides better reliability, with the device built in the same manufacturing plant that builds other products for mission-critical applications.

How accurate is the SEL-735 Meter?

The SEL-735 offers high-accuracy measurements with a ±0.06 percent Wh guarantee at unity power factor and a ±0.02 percent typical rating. It outperforms the requirements of ANSI C12.20 and IEC 62053-22 accuracy class 0.2.

Does SEL provide turn-key solutions and services for metering?

Yes, SEL offers complete metering solutions and engineering services. Visit the Metering Solutions page for more information.

How can I convert a meter from Form 5 to Form 9 or vice versa in the field?

In the terminal window, go to access Level 2 . Type in "FOR 5" to convert the meter to a Form 5 meter, or "FOR 9" to convert it to a Form 9 meter. Follow the prompt, and then confirm the change to change settings.

What metering retrofit options does SEL offer?

SEL offers a complete line of mounting solutions and accessory kits. Visit the Meter Installation Options and Accessories page for more information.

How are synchrophasors used in power systems today?

The basic synchrophasor system building blocks are GPS satellite-synchronized clocks, phasor measurement units (PMUs), a phasor data concentrator (PDC), and visualization software. Multiple PMUs provide synchronized phasor measurements from across an interconnection to a PDC which collects and aligns the data for analysis. Synchrophasor systems have a wide variety of applications and are currently being used for real-time situational awareness, disturbance recording and analysis, wide-area monitoring and control, high-precision state estimation, system model verification, and island detection, just to name a few. The evolution of synchrophasor technology will enable innovations in smart grid technology.

Will an integrated PMU degrade relay performance?

No. SEL designs all of its relays for reliable operation. There is no performance degradation when PMU or any other capability (e.g., Ethernet, DNP3 communications, and event generation) is enabled in the relay.

Where should I locate phasor data concentrators in my system?

For the best results, install phasor data concentrators (PDCs) at each substation and at each control center. Locating a PDC at each substation yields the following benefits:

  • Minimizes the communications bandwidth needed outside the substation. (All PMU data are concentrated before they are sent on to the control center.)
  • Improves security by providing a single point where synchrophasor communications streams can be managed before leaving the substation.
How can I secure synchrophasor communications?

SEL can help you secure your communications paths through system design and by using secure communications devices. By using a PDC in your substation, all PMU communications go through the PDC, providing a layer between the PMU and the outgoing communications. Using the UDP_S protocol out of the PDC further secures the communications out of the substation because all inbound communications are ignored by UDP_S. Finally, SEL offers serial encryption devices, secure Ethernet gateways, etc., to secure communications into and out of your substation.

Is there a way to get synchrophasor data into my SCADA system?

Yes. If your SCADA system supports the IEEE C37.118-2005 synchrophasor standard, you can send data directly from the PDC to your SCADA system. Otherwise, use the SEL-3530 Real-Time Automation Controller (RTAC) to translate from IEEE C37.118 to popular SCADA protocols.

What is an arc flash?

According to the National Fire Protection Association (NFPA) 70E: Standard for Electrical Safety in the Workplace, an arc flash “is a dangerous condition associated with the release of energy caused by an electrical arc.” In an arc-flash event, a flashover of electric current leaves its intended path and travels through the air from one conductor to another, or to ground. In an arc-flash event, the air gets sufficiently heated to become ionized; the air becomes the conductor. 

What causes an arc flash?

Arc-flash events can be caused by numerous factors, such as the shorting of two phases, which creates a phase-to-phase fault. Common examples that cause phase-to-phase faults include dropped tools, accidental contact by maintenance personnel, the buildup of corrosion or conductive dust on conductors, and the presence of pests, like mice, rats, or snakes, that come in contact with energized conductors.  

What elements must be present for an arc-flash event to occur?

The elements needed for an arc flash to occur are: (a) air gap (from using air as an insulator) + (b) sufficient energy (fault current available from the power source) to initiate and sustain the arc-flash event. This is normally satisfied in low-voltage and medium-voltage switchgear environments. The last element is: (c) something to trigger the arc flash—this could be a rodent acting as a conductor across the phase conductors.

What role do air gaps play in an arc-flash event?

Electrical switchgear use air as an insulator for very practical reasons. However, while air is a good electrical insulator under normal conditions, if the air gets heated up and becomes ionized, that air will become a conductor, resulting in an arc-flash event. In environments with air gaps, such as electrical switchgear, arc-flash hazards exist with exposed copper or aluminum-type conductors; e.g., a busbar, contacts on the motor contactor, or contacts of a breaker. To completely eliminate arc-flash hazards, you need to avoid using air as an insulator; e.g., in submersible equipment used in underground vaults.

How much light is produced in an arc-flash event?

In a very small (2,000 Amps) arc-flash event, the measured light intensity was 2,000,000 Lux, or twenty times brighter than bright sunlight (100,000 Lux), at a distance of 1 meter from the arc-flash source. For more realistic arcing currents (e.g., 17,000 Amps), we have recorded arc-flash light intensities of 12,000,000 Lux—this would be the equivalent to the amount of light generated by 120 suns in the sky at one time.

Can you expand on the importance of time in the arc-flash energy equation (V•I•t)?

Arc-flash energy is proportional to V•I•t. Relays don't have any control over the voltage and current. The voltage across an arc is determined by the conductor gap; the arcing current is limited by the available fault current. What the relay can impact is time. By limiting the duration of the arc-flash event, the relay can dramatically reduce the amount of incident energy produced by an arc-flash event.  

How is the current determined in an arc-flash event?

In medium-voltage equipment, the arcing current is slightly less than the bolted fault current, in most cases (~90 percent). In low-voltage equipment, say 480 V, the arcing current is about 60 percent of the bolted fault current. IEEE 1584 includes an equation for calculating the arcing current.

Is the voltage in an arc flash proportional to the voltage in the system?

No, the voltage in an arc flash bears very little resemblance to the open-circuit voltage in the system. For example, if a 15 kV line-to-line medium-voltage switchgear experienced an arc-flash condition, the voltage in the arc is not 15 kV; it is about 250 V line to line.

How does a protective relay help mitigate incident energy from an arc-flash event?

Since arc-flash energy is proportional to V•I•t, the protective relay acts to reduce the duration of the arc-flash event, or “t.” (Note: In an arc-flash event, this equals the time elapsed before the relay trips plus the breaker clearing time.) 

How is arc-flash mitigation configured with SEL protective relays?

Arc-flash mitigation is available as an optional arc-flash card with the SEL-751 and SEL-751A Feeder Protection Relays and the SEL-710-5 Motor Protection Relay. It can be ordered factory-installed with new SEL-700 series relays or as a field-installable upgrade kit for retrofitting. It comes standard with the SEL-849 Motor Management Relay for low-voltage motors.

What's the maximum number of arc-flash sensors on a given relay?

Up to 8 sensors can be supported, depending upon the SEL relay model. Both the SEL-710-5 Motor Protection Relay and the SEL-751 Feeder Protection Relay support an optional 8-input card. The SEL-751A Feeder Protection Relay supports a 4-input card.

What other types of arc-flash mitigation are available in addition to SEL's combination of light-sensing technology and overcurrent detection?

(1) Light only. We do not recommend this approach, as it is vulnerable to unexpected light sources (flash photography, lasers, etc.).
(2) Light flash, supervised by pressure. However, sound pressure is very challenging to test during commissioning.

Is maintenance switching sufficient to mitigate against an arc flash, or is more required?

A lot of SEL customers use a maintenance switch (a button on the front of the relay) that changes the settings group from inverse time-overcurrent protection (and perhaps some other elements) to an instantaneous trip mode. This takes 1.5 cycles, but with arc-flash detection, the relay can respond in 1/4 of a cycle. One of the disadvantages of a maintenance mode is that it is process-dependent; it only works if someone turns it on, and it relies upon human intervention. Also, it does not protect against unforeseen events; e.g., a rodent climbing in the switchgear.

Should a worker rely on arc-flash detection when selecting personal protective equipment (PPE), or is it for equipment protection only?

Arc-flash mitigation using protective relays is used to protect both personnel and equipment. Relay behavior is always used in the calculation of incident energy levels. The light plus overcurrent technology used by SEL protective relays is simply another technology integral to the relay, which is used to determine incident energy levels. We have seen several examples where substantial reductions in arc-flash-generated incident energy were achieved that could result in PPE reductions. However, SEL does not advise on PPE selection other than to follow appropriate federal and state guidelines based on incident energy exposure.

Is arc-flash detection needed for low-voltage motors?

Yes. Low-voltage motor circuits can generate arc-flash events. SEL provides two motor protection relay solutions with arc-flash detection: the SEL-710-5 Motor Protection Relay (with optional arc-flash detection) and the SEL-849 Motor Management Relay (with embedded arc-flash detection) for low-voltage motors.

How is the arc flash mitigated inside of a motor control center (MCC) bucket?

Using hardwired connections or communications, the protective relay sends a signal to the SEL-751 or SEL-751A Feeder Protection Relay on the incoming feeder, acknowledging that an arc-flash light source has been detected in the MCC bucket. The SEL-751 or SEL-751A Relay will see the fault current going into the motor bus, and it will make the trip decision, clearing the bus and thereby removing the arc-flash hazard from the MCC.

How does the new version of Compass access proxy/firewall settings?

Older versions of Compass pulled the proxy/firewall information from only Internet Explorer settings.

To allow more flexibility when behind proxies and firewalls, Compass now performs the below steps in the order listed to determine how Internet access is accomplished. If a connection option is not valid, Compass moves to the next option in the list. Once a viable connection to the Internet is found, Compass will stop looking. If no connection to the Internet can be made, an error message is presented.

Compass connects to the Internet by:

  1. Pulling connection information from the Compass options form.
  2. Using the Web Proxy Autodiscovery Protocol (WPAD) to determine the location of the Proxy AutoConfiguration (PAC) file through DHCP and DNS lookups.
  3. Pulling connection information from Internet Explorer proxy options.
Compass is reporting that it is not able to find the update file at the source location. How do I resolve this issue?

The recent changes (i.e., servers hosted by CacheFly and how Compass detects the route to the Internet) may result in Compass reporting that it is not able to find the update file at the source location. Outlined below are known remedies for the aforementioned message.

If you know the proxy information, enter that data into the appropriate field in Compass. Enter the proxy information by selecting from the menu bar: Tools -> Options -> SEL User Account. At the bottom of the SEL User Account Logon Information form, you will see the space to enable and enter the settings for a proxy server.

Alternatively, your company’s IT/IS group can add exceptions to the routing tables, which will allow Compass access to needed sites. All the necessary links are listed below.

Besides being the list of sites to which Compass needs access, the list below is also the order used by Compass to download needed items.

  3. After verifying Internet access and user credentials SEL Compass then redirects to a different location based on the package chosen to download.
    1. Software packages, like acSELerator QuickSet, get redirected to
    2. Other packages would go to *
  4. Certificate resolution is done via

Items we have seen that will interfere with the process:

  • The number of redirects allowed is too small.
  • Compressed (*.ZIP) files from the above websites need to be allowed.
  • While CacheFly does not use streaming, blocking of streaming may blacklist CacheFly sites. We believe this is because CacheFly can stream data, and the “blanket” block is stopping Compass from getting to CacheFly.

The standalone installation for the software is available for download from:

Can I view the CBT once I have completed it?

Yes. You will have one year from the date you purchased your CBT to access the material as often as you like. Once successfully completed, the course will open in Review Mode, which means that you can do everything except submit the final knowledge check score.

Can I get a PDF of the CBT?

No. CBTs are highly interactive and rich in multimedia content. There is no way to capture the course within a PDF without removing that content first.

How is the student assessed in an SEL University course?

Currently, all instructor-led SELU courses include informal assessment activities that facilitate student-instructor feedback and skill mastery. By completing hands-on activities and exercises, students can apply their knowledge or practice new skills, and can therefore measure how well they are performing. Student mastery and achievement are also continuously assessed and measured by the instructors who closely monitor student performance, assist, and answer questions during the hands-on exercises.

In absence of an instructor, computer-based training courses require completion of a final knowledge check.

How do I access my course or precourse material?

All course material can be accessed through your mySELU Training page,

I registered for a course, but it is not listed on the mySELU Training page?

Did you just enroll?
With new mySEL accounts, our various servers need to communicate with each other to verify that there are no other accounts associated with your email address. Due to server sync times, this process could occur quickly, but at its latest, may take up to 48 hours. If the course still does not appear in your mySELU Training page after 48 hours, please contact

Did you pay with a PO?
If you paid with a PO, you must contact with your purchasing information before the course will appear in your mySELU Training page.

Contact to have your account reset. See How do I access my course? for information on how to properly access your CBT.

When should I access my course?

WBTs are live scheduled events, and will only be available starting 30 minutes prior to the scheduled time.

Will I have access to the slides to print beforehand?

Day one course slides will be provided during the test session, typically scheduled a week before the course. The test session can be accessed through the mySELU Training page.

May I have a recording of my WBT?

Sorry, at this time, WBT recordings are not made available to students.

Where do I find the scheduled times for WBTs?

You can find the time on the Course Overview page, in the “Available Courses” box. Look for the date of your course, and click the “More” button to expand the additional details. If you have already registered, the time will be shown (in Pacific Time) on your mySELU Training page.

How do I participate in a WBT from my tablet?

Most tablets are compatible with the web conferencing software used to present our WBTs. However, videos played during the course will not play without the Adobe Flash plugin. Test your tablet’s performance here: If you would like more information about using your tablet in our course meeting room, you can consult the following pdf:

How do I participate in a WBT from my smart phone?

Most smart phones are compatible with the web conferencing software used to present our WBTs. However, videos played during the course will not play without the Adobe Flash plugin. Test your phone’s performance here: If you would like more information about using your tablet in our course meeting room, you can consult the following pdf:

I can view the WBT slides, but none of the videos are loading.

Any videos played within a WBT are Flash-based. Some browsers like Safari or mobile devices block Flash content. Currently, presentation slides will display without a Flash player, but any videos or animations require Flash to function. Try watching the WBT from a desktop using a different browser like Internet Explorer or Chrome, and checking that you have the latest version of Flash installed on your computer.

I have installed Flash, but I’m still having problems loading videos.

Some browsers require users to enable the Flash plugin before allowing it to run. If you have downloaded the Flash plugin, but still cannot get a video to run, try following the steps to enable Flash within your browser.



Internet Explorer

Are any discounts offered for courses?

Yes. Register for a scheduled paired course and/or for consecutive courses within 7 days of each other and save 10 percent.

May I reserve a spot in a course while I work out the paperwork on my end?

Sorry, we do not reserve spots in any course without payment information. Either a credit card or a purchase order (PO) must be used. If using a PO, it must be provided before the registration can be processed.

May I sign someone else up for a CBT or WBT (eLearning)?

No. The person who will access the eLearning must be the one who registers for the course. The training is available only through an individual’s mySEL account.

How can I pay for training?

SEL accepts payment by credit card, check, or purchase order. A copy of the PO must be provided for our records, as well as billing purposes, before the registration can be processed.

What if my company only pays by check, and doesn't issue purchase orders?

You may mail your registration form and the check to SELU. However, all courses are filled on a first come, first served basis, and registration is not guaranteed with this much slower form of payment. If the course is full, we will contact you with additional options.

The course I want to register for is full, do you have a waiting list?

Yes. Contact if you would like to be placed on a course’s waiting list. There is no guarantee that you will be enrolled into the course, however. Inquire into our On-Demand Training to schedule an SELU course in a time and location that meets your needs.

I'm trying to apply for a job but never receive the account PIN, what do I do?

Applications for career opportunities at SEL are handled in a dedicated system that is not associated with the mySEL account or customer login. To search career opportunities or apply for a position, please click the "Apply Now" button on the careers page.
Information about resetting your password for the careers login can also be found on this page as well as general application FAQs.  If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact SEL Human Resources at 1.509.334.8060 or

What is a mySEL account?

Your mySEL account provides access to a variety of resources, including secure documents, online product configuration, and online ordering. 

Why do I need to register for a mySEL account?

At SEL, security is a top priority. We understand that keeping information safe is critical to our industry. When you register with us, we can give you access to the information you need.

A mySEL account provides access to a variety of resources, including secure documents, online product configuration, and online ordering.

What if I don't receive an email with my new PIN?

If you do not see an email in your inbox within 15 minutes, please check your junk/spam folder. Contact if you have any questions. Please note: Your PIN is valid for 8 hours.

What are the password requirements?

Passwords must contain a minimum of 8 and a maximum of 50 characters. Passwords must include:

  • At least one uppercase letter
  • At least one lowercase letter
  • At least one number or symbol including , . ! ' @ $ ^ & * _ \ + = ~ / ( ) - 
    Please note that no other symbols or characters such as #, ?, or : are allowed. 

Passwords cannot contain three of the same characters in a row and cannot contain the word "password."

How do I change my account access?

Registrations from non-company-specific domains (Gmail, Hotmail, etc.) are granted limited access and are subject to review based on your need for resources. Most account reviews are processed within two business days. If you need an expedited review, please email

Why is my account inactive and how do I reactivate it?

All accounts must be used within a one-year period. Accounts using non-company-specific domains (Gmail, Hotmail, etc.) must be revalidated annually. You can reactivate your account by logging in and updating your account profile. Once updated, our system will send you an email with a six-digit PIN. After activating this PIN, your email address will be re-reviewed for access. Using a company-specific email domain will ensure faster turnaround. 

What is two-factor authentication?

This is an optional feature for your mySEL account using Google Authenticator. When you enable 2-Step Verification (also known as two-factor authentication), you add an extra layer of security to your account. You sign in with something you know (your password) and something you have (a code sent to your phone). 

I have two-factor authentication turned on but no longer have access to the device used to set it up. What should I do?

If you’ve selected to remain logged in on our site, you can access your account profile and reconfigure two-factor authentication. If you are unable to access your account and no longer have the device used to establish two-factor authentication, please email We will verify you are the account holder and remove two-factor authentication so that it can be re-established with your new device.