All posts by Ryan Dickinson

Product Spotlight: Square D EDB34030 Circuit Breaker

The Square D EDB34030 is a three pole, 30 Ampere circuit breaker. At 277V, this miniature breaker is reliable, sustainable, efficient and safe.

Part Number: EDB34030
Item Weight: 3.6lbs
Product Dimensions: 9.7 x 6.1 x 4.5 inches
Voltage: 480V
Amperage: 30A
Trip Rating; 875A
Mounting Mode: Bolt-on
Interruption Rating: 18kA

Square D EDB breakers by Schneider Electric are available in a range of amperages varying from 20A to 60A. This particular model, the EBD34030, is 30A.
This breaker is set apart from other breakers because of its compact size at 9.7 x 6.1 x 4.5 inches, while the typical breaker is around 8 x 8 x 12 inches. As a bolt on mount, it is preferred in commercial and industrial applications where vibrations might be considered an issue. When installing, be sure to use the recommended #12-#6 AWG AI or #14-#6 AWG Cu Lug wire. This breaker is ideal for NF series panel-boards to offer superior overload and short circuit stability by utilizing thermal magnetic protection. It is also HACR rated, UL listed and CSA certified.

MRO Electric and Supply stocks Square D circuit breakers, including the EDB34030. For more information or to request a quote, please contact us at 800-691-8511 or at sales@mroelectric.com.

What are circuit breakers?

A circuit breaker is a preventative safety device that detects and stops a circuit if the current is insufficient or in excess. These devices help insure the stability of the electric current in our buildings. Unlike fuses, breakers are reusable and can be consistently relied upon to break a circuit to protect us from potential electrical fires.

How do they work?

A breaker is comprised of a few basic components. A switch is connected to an electromagnet that allows electricity to flow from the bottom to the top terminals.

Source:
http://spmphysics.onlinetuition.com.my/2008/06/uses-of-electromagnet-circuit-breaker.html

With current running through the electromagnet, it becomes magnetized. If the current is suddenly increased, the magnet becomes strong enough to pull down a metal lever attached to the switch linkage. By doing so, the contacts are broken and the electricity is powered off.

What’s the difference between certain breakers?

Residential Circuit breakers- Used in common household wiring to protect electrical appliances like refrigerators, washing machines and fans. Electrical panels can also be designed to have one breaker controlling one specific or multiple outlets in a room that shut off when overloaded.

Industrial Circuit breakers- Used with much larger electrical current applications for warehouses, factories, and other large industrial locations. They can be used to insure safety of the plant equipment, lighting, business systems, air conditioning and wiring.

Voltage– Describes the ‘pressure’ of the electricity. The most common voltages of breakers are . Most household voltage is 120V, with larger appliances around 240V.
Amperage– Measures strength of the current in amperes. Common amperages include 15A, 20A, 25A, up to 6000A.
Pole number– Describes the number of completely separate circuits that can be protected by a circuit breaker at the same time. These include single-pole, double-pole, triple-pole and tandem pole breakers.
Installation location/External Design– Breakers can be designed to be indoor or outdoor based on the application. Different enclosures can be made to withstand different weather conditions.
Interrupting Mechanism– Other breaker designs include air circuit, oil circuit, vacuum circuit, MCB, MCCB, GFI, GFCI and AFCI breakers. While these all serve the same purpose of breaking electrical current in the event of unstable electric power consumption, they have different means of interrupting the current.


Visit MRO Electric and Supply’s website to see all of our available Circuit Breakers. If we don’t have what you need listed on the site, contact us at sales@mroelectric.com or (800)691-8511 and we will be happy to help.

Considerations for buying automated parts

What are automated parts used for?

Automation is crucial in manufacturing and is the backbone of our industries. Robots can automate highly variant, dangerous and exhausting tasks in a high-quality and cost effective way. By increasing productivity at a lower cost, maximum cost efficiency is reached, which is ideal in a business setting.

What should I be looking for when buying automated parts?

There are a number of things to keep in mind when buying automated parts for your warehouse or setup. Below is a basic guide with questions to ask yourself to make the process a little easier.

Is there a warranty? If so, for how long?

Protect your investment on your automated parts. Warranties are important in insuring that your part is functioning as intended and in getting what you paid for. Make sure you check under what instances a warranty can be claimed and how long the warranty lasts. Are there detachable parts within the automated component that are covered? MRO Electric and Supply offers a minimum 12-month warranty on all listed parts.

Is the part compatible with the machinery that is already there?

There are a multitude of environments that certain parts can be more oriented towards, including in aerospace and automotive manufacturing, food processing plants or laboratories. It is essential that the part be used in the correct application to be effective. It is obviously important that the automated component works with the setup already in place. Some additional compatibility questions to ask yourself before buying:

Does the weight or form factor impact its compatibility? Is space an issue?

Many people are eager to buy large parts for their warehouses without considering the space to put them. Consider the part and its intended configuration. Include additional equipment that comes along with the part like peripherals, fencing, light curtains or mat guards.

Will the condition of the part affect its lifespan in this application? Is there a newer, better part for this application?

Check to see if the part is new, used or refurbished, and if the condition will affect its application. Many industrial parts are discontinued as new technologies evolve, and while these legacy parts are still useful, newer components might work more efficiently or effectively. Check to see if there are any advantages or disadvantages to older and newer generations of your part and weigh your options.

Visit MRO Electric and Supply’s website to see our selection of automated parts from manufacturers like Yaskawa, Modicon, Control Techniques, Siemens, and FANUC. If we don’t have what you need listed on the site, contact us at sales@mroelectric.com or (800)691-8511 and we will be happy to help.

Yaskawa Drive Types

Yaskawa

Yaskawa Electric is a global manufacturer of high-quality parts used in robotics and automation. They specialize in servos, controllers, switches, robots, drives and more. These parts are used for a variety of purposes in industry. In this post, we will be distinguishing the different types of Yaskawa drives.

CIMR Drives
E7 Drives– Designed for commercial HVAC applications. Embedded with Modbus, APOGEE FLN and Metasys N2.
F7 Drives– Well-rounded drive with a variety of uses. Contains NEMA Type 12 enclosure with space to expand filters, fuses, I/O cards and more.
G7 Drives– Low voltage drive that uses 3 level control to combat problems with long motor cables and premature motor bearing failure. Great vector performance and flexibility. Configured options with pre-engineered cabinet options available.
P7 Drives– Created for applications with variable torque like centrifugal pumps and fans.

yaskawa p7

GPD Drives
GPD 333– General purpose AC Drive, 1/4 the size of normal PWM drives.
GPD 503/505/506– High-performance three phase voltage/frequency output with adjustable speed control.
GPD 515- PWM AC drive designed for low motor noise and high starting torque.

Microdrives
J1000 Drives– General purpose drives with open loop voltage/frequency control with preferred parameter feature. Simple variable speed of up to 7.5HP.
V1000 Drives- Compact current vector drive designed for efficiency and maintainability. Capable of up to 25HP. Economical for basic variable speed applications.
V1000-4X Drive- The same as the V1000 but with an enclosure built for dust tight environments.

Other Drives
A1000 Drives – High performance general purpose drive capable of up to 1000HP. Used for general purposes.
P1000 Drives – Torque performance capable of withstanding 1000HP. Oriented towards variable torque applications including centrifugal pumps and fans. Configured and bypass options available.
U1000 Industrial Matrix Drives – Regenerative high performance vector drive capable of up to 800HP. Used for general purposes.

Source: https://www.yaskawa.com/

Visit MRO Electric and Supply’s website to see all of our available Yaskawa Drives. If we don’t have what you need listed on the site, contact us at sales@mroelectric.com or (800) 691-8511 and we will be happy to help!

How does a relay work?

What is relay?

A relay is an electrically controlled switch that has the ability to turn a circuit on or off. Depending on the application relays can do a number of things. Relays can be used as switches to turn things on and off, or as amplifiers to convert smaller currents into larger ones. They can also be used to control a circuit with a low power signal or when multiple circuits need to be controlled by a single signal.

There are two kinds of relays, electromagnetic and solid state. In this post, we will be focusing on electromagnetic relays and how they work.

Basic Parts of a relay

Armature– is a basic metal piece that is balanced on a pivot or a stand. It is considered the moving ‘arm’ of the relay. It makes or breaks the connection with the contacts connected to it.

Spring– is connected to one end of the armature and pushes the armature back into place if no current is passing through.

Electromagnet– is a metal wire wrapped around a metal core. The wire does not have magnetic property but can be converted into a magnet with the help of an electrical signal.

Yoke– is a small metal piece affixedon a core which attracts and holds the armature when the coil is energized.

Contacts– conductive material that exists within the device whose physical contact opens or closes a circuit

A break refers to the number of locations on a circuit that a switch can make or break the flow of current. In electromechanical relays, there can be single breaks and double breaks. A single break is usually used with low power devices while a double break is usually used with high power devices.

A pole refers to the number of circuits that relays can pass through a switch. A single pole contact carries current through one circuit, while a double can carry it through two.

A throw refers to the number of separate wiring paths. For example, a triple throw switch can be connected to one of three contacts instead of one.

How does it work?

Source:
https://www.electronics-tutorials.ws/io/io_5.html

In an electromechanical relay, a small circuit has the ability to switch a larger circuit on or off through contacts by using an electromagnet. When charged, the electromagnet creates a magnetic field that attracts the armature and closes the contacts. Some contacts come in different configurations depending on the use of the relay. A normally open (NO) relay’s contacts are open when there is no current passing through, while a normally closed (NC) relay’s contacts are closed when there is no current passing through.

Source:
https://www.explainthatstuff.com/howrelayswork.html

There are many things to consider when choosing a relay for a project. Lifespan, operating environment, mechanical loads, size, and number and type of contacts are all important factors in choosing the right relay.

Pros and Cons of Electromagnetic relays

Advantages

Fast operation and reset

More definitive ON/OFF

Simple and most reliable

Disadvantages

Suffers the effects of age

No directional features


MRO Electric and Supply has an extensive inventory of relays in stock.  Please call email sales@mroelectric or call us at 800-691-8511 for a quote.