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Hotline FAQ: Black and Gray Capacitors

Some Franklin Control Boxes have only black colored capacitors while some have both black and gray capacitors. Why?

Black capacitors are start caps. Start capacitors are used to start the motor and are then switched off by the relay. Gray or silver colored capacitors are run caps. Run caps help start the motor and then continue to provide energy to the start winding after the start capacitor turns off, making it an auxiliary or helper winding. This extra energy in the auxiliary/start winding improves the operation of the motor and makes it slightly more energy efficient.

Column-by-Column: Motor Model and Rating

We previously established the wealth of knowledge held in the AIM Manual for contractors and installers and the two pages that stand out (pages 13 and 14). Packed with information essential to single-phase motor installation and troubleshooting, we continue in this post to review pages 13 and 14 column-by-column.

Again, if you are dealing with 50 Hz motors, you will need a 50 Hz AIM Manual. Also, for those dealing with a 3-phase motor, please reference the table on page 22 of the AIM Manual. This series will focus on Franklin single-phase submersible motors.

Continuing from our last post, working across table 13 on page 13 of the AIM Manual, the second column is labeled the motor model prefix or motor model number. Franklin Electric submersible motors have 10 digit model numbers, this column contains the first 6 of those. Each of these numbers means something, but it’s not important to know what they mean. After all, that’s why the motor rating, voltage, and hertz are etched on the nameplate. Continue reading

Column-by-Column: an AIM Manual Series

The AIM Manual holds a wealth of knowledge for contractors and installers, but there are two pages that stand out, pages 13 and 14. These pages are packed with information imperative to single-phase motor installation and operation. This Franklin AID introduces a series where we will review pages 13 and 14 column-by-column, maximizing your knowledge and understanding of single-phase motor specifications.

If you are dealing with 50 Hz motors, you will need a 50 Hz AIM Manual. Also, for those dealing with a 3-phase motor, please reference the table on page 22 of the AIM Manual. This series will focus on single-phase motors and will either be 115 or 230 volts.

Beginning on page 13, column one has the heading “Type” and lists the five types of single-phase submersible motors, manufactured by Franklin Electric, starting with 4-inch, 2-wire. The “4-inch” is slightly redundant here, as 2-wire motors are only available in 4-inch. These motors are manufactured in ratings from ½ to 1.5 hp, with the ½ hp being unique in that it comes in 115 and 230 volts. It is important to keep in mind that 2-wire motors have no control box or any type of capacitor associated with them. Continue reading

Most Missed Question

by: Mark Reeder

Franklin Electric’s Certified Contractor Program recognizes those water systems contractors that have made a commitment to understanding the proper application and installation of Franklin products. Attendance at an all-day Franklin Tech session, either at the factory, or “on the road” automatically certifies a contractor.

However, water systems contractors with 5 or more years experience with Franklin products can “test-out” of BASIC Certification with an exam.

Many of you have taken the Franklin Electric Certified Contractor exam on our Key Dealer website at www.keydealer.franklin-electric.com. Looking back at the results so far, there is one question that is most frequently missed on the test:

True or False? Amp draw is a reliable indication of electrical power consumption.

The correct answer is False, but it’s an easy one to get wrong. Here’s why: Continue reading

Hotline FAQ: SubMonitor Protection

What information do I have to input when using Franklin’s SubMonitor protection system?

The SubMonitor is designed to work on motors that operate between 5 and 350 amps with worldwide standard voltages. The only information the SubMonitor needs is:

  1. Power supply of 50 or 60 Hz?
  2. Incoming line-to-line voltage?
  3. Maximum amp rating of the motor?

Everything else is factory set in the SubMonitor to provide optimum motor protection.

Hotline FAQ: Subtrol Sensor

Franklin’s motor literature talks about a Subtrol Sensor; what is that?

The Subtrol Sensor is a thermostat and transmitting device buried inside certain Franklin Electric 3-phase, 6- and 8-inch submersible motors. The Subtrol Sensor is used in combination with Franklin’s SubMonitor protection device. If the internal temperature of the motor becomes too high, the thermostat turns on the transmitter. The transmitter then sends a signal up the motor wires, which is picked up by the SubMonitor in the pump panel.  By using a Subtrol equipped motor and the SubMonitor, you get high temperature protection without running extra wires down hole.

What You Don’t Know About Lightning Can Hurt You (AMENDED)

Lightning is one of the primary causes of failure in submersible motors. Without any protection a submersible motor has approximately a 30% chance of damage by lightning-induced surges within a year. Each year lightning strikes 16 times for every square mile, starts 75,000 forest fires and, according to the National Weather Service, kills 40 Americans every year. Lightning is also one of the primary factors in the failure of submersible motors. A direct hit during a storm can knock a motor out immediately; however, it is usually a power surge that causes damage. When a motor is hit with a voltage surge a carbon track is left in the motor, and with each following surge the carbon track builds. Continue reading