Global Harmonization Efforts; Categorizing Manual Motor Starters - ABB MS116 Manual

7.1.4 Global harmonization efforts

As globalization continues to impact consumers more and more each year, it is becoming increasingly important for
customers to understand the rules and regulations of multiple world regions. In an effort to limit the scope of
knowledge required to achieve this without sacrificing safety, standards development organizations, including Un-
derwriters Laboratories (UL), the Canadian Standards Association (CSA), and the International Electrotechnical
Commission (IEC) are working together. They are combining best practices, eliminating antiquated verbiage, and
producing harmonized global standards.
Most notably for the purpose of this document, these organizations have adopted the IEC 60947-4-1 standard to har-
monize the UL 60947-4-1 and CSA C22.2 No. 60947-4-1 standards for Electromechanical Contactors and Motor-
Starters, which now govern the certification of manual motor starters, replacing UL 508 and CSA C22.2 No.14.

7.1.5 Categorizing manual motor starters

Products certified through UL are categorized according to their intended use. This categorization is part of a hierar-
chical structure of 4-digit codes, referred to as Category Codes (7.1.5 Categorizing manual motor starters). In
addition to providing a means for categorization, CCNs also provide installers with clear directions regarding how to
properly apply the devices. This is important to consider, as although two products may appear physically similar,
their suitable uses may differ drastically. To help avoid issues in regards to proper application, the Online Certifica-
tion Directory available on the UL's website provides customers with a means of searching for certified components
(http://ul.com/database).
Manual motor starters belong to two separate CCNs:
Manual Motor Controllers
NLRV
Listed Manual Motor Controllers certified according to
NLRV
UL 60947-4-1 (UL 508) for use in the United States
Listed Manual Motor Controllers certified according to
NLRV7
CSA C22.2 No. 60947-4-1 (CSA 22.2 No.14) for use in Canada
Naturally, any attempt to categorize the vast array of products and technologies available for electrical applications
can create drawbacks. Most notably, CCNs are intentionally broad, and are often unable to differentiate between sim-
ilar products technically. For this reason, manual motor starters tested and classified under CCN Manual Motor
Controllers (NLRV) occupy the same category as other manual controllers, such as non-fusible disconnect switches,
meaning that the inclusion of protective releases, such as thermal and magnetic trip mechanisms, is often under-
stated our completely overlooked.
In an effort to credit their ability to protect circuits in addition to loads, manual motor starters can be tested and
classified under an additional product CCN – Combination Motor Controllers (NKJH). This also means that the suita-
ble applications for manual motor starters are split between the two categories. he simplest explanation of the
division of applications can be viewed as:
Applications requiring an upstream branch circuit
protective device (fuses or 489/No.5 circuit-breaker)
Manual Motor Controllers (NLRV)
— Single motor disconnect
— Group installations
— Tap conductor protection in group installa-
tions
APR I L 19
MA N UA L MOTOR START ER G UI D E
Dual categories
Listed Combination Motor Controllers certified according to
Listed Combination Motor Controllers certified according to
CSA C22.2 No. 60947-4-1 (CSA 22.2 No.14) for use in Canada
Table 20: Categorizing manual motor starters
Applications requiring no additional branch
Table 21: Applications requiring
Combination Motor Controllers
UL 60947-4-1 (UL 508) for use in the United States
circuit protection
Combination Motor Controllers (NKJH)
— Manual self-protected Type E
— Type F
— Protection of ABB Micro drives
NKJH
NKJH
NKJH7
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