Schweitzer Engineering Laboratories, Inc.

SEL designs, manufactures, and supports products and services in protection, monitoring, control and automation. SEL has more than 5,000 employees all over the world. It owns and operates four state-of-the-art manufacturing facilities, three in the USA and one in Mexico. It provides local application assistance from more than 60 offices in the USA and in nearly 50 branch offices worldwide. Overall, SEL does business in 147 countries.
Product groups:
1.1.3 Transformers
1.4.3 Measuring instruments
1.4.4 Automation
1.4.5 Control and monitoring systems
1.4.6 Adjustment. Tests. Protection.