Aggregates Manager

July 2014

Aggregates Manager Digital Magazine

Issue link:

Contents of this Issue


Page 15 of 39

AGGREGATES MANAGER July 2014 14 0 1.0 0.9 0.8 0.7 1 2 3 4 5 PERCENT VOLTAGE UNBALANCE DERATING FACTOR Horsepower derating factors Caution: Before performing any tests, the person performing the tests must be thoroughly familiar with the test equipment being used, have the appropriate personal protective equipment, know the risks involved in performing the test, and know how to do the work safely. e third test uses non-contact infrared pyrometers. Non- contact infrared pyrometers help identify potential motor temperature problems by identifying abnormal hot spots, bearing problems, air flow problems, and cooling problems. Standard motors are designed to operate with a maximum total winding temperature rise of 176°F (80°C) by resistance for NEMA class B or 221°F (105°C) by resistance for NEMA class F above 104°F (40°C) ambient. If the surface of a motor exceeds 248°F (120°C) for a class B motor or 293°F (145°C) for a class F motor, it may indicate a winding or cooling problem; the motor winding temperatures should be measured and monitored, or the motor should be taken out of service so that the problem can be fixed. e motor's insulation class can be found on the motor's nameplate. Graph 1 e-mail: or visit Call 800-430-4540 "The Story of Cubee the Aggregate" Coloring Book Cubee and his aggregate friends take children on a magical journey from the quarry to the community to see how aggregates are used in our schools, roads, and structures. It's a great story combined with 20 pages of coloring fun. For students in grades K-3. Prices range from $1.20-$1.85 per book, based on quantity. Customize books with your company logo! "You're on Rock" Workbook Twenty pages of earth science facts, activities and puzzles help junior geologists, mining engineers and earth scientists learn about aggregates. For students in grades 4-6. Prices range from $1.20-$1.85 per book, based on quantity. Customize books with your company logo! Cubee the AggMan T-shirts Fun for kids of all ages, this 100% pre-shrunk cotton t-shirt is a long-lasting reminder of your event or presentation. Sizes: Youth XS (2-4); Small (6-8); Medium (10-12); Large (14-16); Adult Small (34-36) Price: $6.95 per t-shirt (plus 15% shipping & handling). Quantity discounts available. O 100 so makes learning fun! shipping & handling). Cubee the AggMan C onnect with the youth of your community through education. Whether you are sponsoring an open house or presenting in the classroom, Aggregates Manager community outreach tools make learning fun.

Articles in this issue

Links on this page

Archives of this issue

view archives of Aggregates Manager - July 2014