Features And Benefits - Siemens ETU745 Application Manual

WL Circuit Breaker
Introduction
Businesses are becoming increasingly more intelligent about
the way they consume energy. Industrial and Commercial energy
consumers are continuously looking for practical and efficient
methods of measuring their energy usage while simultaneously
ensuring any possible downtime is minimized. At Siemens we
understand those needs and we have developed products and
solutions to help energy consumers achieve their goals.
One of our solutions begins with our world-class WL Circuit
Breakers. The WL line-up of breakers developed by Siemens
combines decades of patented circuit breaker protection
experience with the latest technology in circuit breaker
performance and communication.
A good example of our innovative technology is, Dynamic
Arc-Flash Sentry® (DAS). DAS is a solution that allows users
the ability to automatically lower the down-stream available
fault current when facility personnel are nearby the electrical
equipment. Helping our customers provide a safer work-place
environment is an important part to our overall solutions.
Other valuable aspects that complement our solutions are the
WL circuit breaker's ability to gather energy and environmental
data and send it to a central or remote monitoring network
system. You'll find these capabilities and more when you take
a closer look at WL circuit breakers features within this guide.
WL Circuit Breaker features and benefits
• 3 frame sizes: Three frame sizes that cover a wide range of
continuous current ratings allow for flexible exchange of
breakers to other compartments and reducing the footprint
of the breaker enclosures.
• Ready-to-close indication: Built-in check points of the
breakers mechanical operator provide an additional layer of
safety and external controls by inhibiting the breaker from
closing until certain conditions are satisfied.
• 100% rating: All model breakers are designed for continuous
operation at their maximum current ratings without de-rating
the frame.
• High-efficiency: Low loss of energy flowing through the
breaker reduces the operating costs.
• Bi-directional feed: Top or bottom supply feed without any
hardware configuration changes.
• Rogowski coil sensing: Full range sensing without tap terminals
or exchanging sensors to match load change requirements.
• Modular trip unit: Upgrading to a higher or lower
current rating, adding ground fault, power monitoring
or communication is cost effective and expandable
using separately available modules.
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Courtesy of NationalSwitchgear.com
• Common accessories: Interchangeable accessories for all
frame sizes makes upgrading easy and readily available.
Practical solution
Applications
The WL line of power breakers are protecting electrical
distribution applications like waste water treatment, industrial
plants, hospitals, transportation systems and data centers just
to name a few. Yes, mission critical applications trust the Siemens
WL circuit breakers to operate safe and reliably. The compact
modular design provides higher power density in a section or
line-up of distribution gear. Components like spring-charging
motor, shunt trips, and trip units are common across the entire
line of breakers. That allows users the ability to stock fewer
spare parts or exchange options if necessary. Common options
and accessories also make learning how to order, maintain
and operate the WL much easier than most breakers on the
market today.
WL circuit breakers are manufactured and performance tested
to comply with UL489 and UL1066 standards for listed products.
UL/CSA 489 Listed type WL low voltage insulated case circuit
breakers are generally intended to provide service entrance, feeder,
and branch circuit protection in accordance with UL/CSA 489
Standard for Safety for Molded-Case Circuit Breakers, Molded-Case
Switches, and Circuit-Breaker Enclosures. This versatile family
of insulated case circuit breakers is acceptable for use within
low-voltage switchboards (i.e. UL 891), low-voltage motor control
centers (i.e. UL 845), and other types of industrial control equipment
(i.e. UL 508 series). Certain options and maintenance capability
may be limited in comparison to the UL1066 Listed circuit breakers.
UL file numbers E231263, E236091 and E236299 apply.
UL 1066 Listed type WL low voltage power circuit breakers are
generally intended to provide main and feeder circuit protection
in accordance with UL1066 Standard for Safety for Low-Voltage
AC and DC Power Circuit Breakers Used in Enclosures. Presently,
there is not an equivalent CSA standard to UL 1066, and therefore
these circuit breakers do not carry a CSA listing mark. These circuit
breakers are constructed in compliance with ANSI/IEEE C37.13, and
performance tested in accordance with ANSI C37.50. Throughout
this document any reference to UL1066 will also mean ANSI C37
Certified. This versatile family of power circuit breakers is acceptable
for use within low voltage switchgear (i.e. ANSI/IEEE C37.20.1,
ANSI/IEEE C37.20.7, and UL 1558), low voltage switchboards (i.e.
UL 891), low voltage motor control centers (i.e. UL 845), and other
types of industrial control equipment (i.e. UL 508 series). Certain
options and ratings may be limited may be limited in comparison to
the UL/CSA 489 Listed circuit breakers. UL file numbers E240124,
E240232, E240233 and E236299 apply.
WL Circuit Breaker Selection and Application Guide