Cutler Hammer, Div of Eaton Corp WMS General Product Line Information
45-164
Circuit Breakers & Supplementary Protectors
Current Limiting Supplementary Protectors
August 2006
WMS
45
WMS — Supplementary
Protector
Single-Pole
2-Pole
3-Pole
Product Description
■ Dual standard breaker:
❑ Recognized by UL and CSA under
UL 1077 and CSA 22.2
❑ Third-party approved by KEMA
according to IEC 898
■ CE marked in accordance with Low
Voltage Directive (LVD) (73/23/EEC).
■ Used to provide overcurrent protec-
tion where branch protection (for
example UL 489 MCCB) is already
provided or not required.
■ Installed as a component within or
part of an appliance or a piece of
electrical equipment.
■ Ideal replacement for fuses that are
applied as a supplementary protector,
i.e., in addition to branch protection
(if required).
■ 35 mm DIN-rail mountable, utilizing
metallic “extra strength” spring clip.
■ Light gray case with gray handle,
that is marked “O” for OFF and “I”
for ON.
■ UL File Number E162396.
■ CSA File Number LR105508-2.
Application Description
Cutler-Hammer Supplementary
Protectors are ideal for providing protection in a multitude of applications,
including:
■ Motor control circuits.
■ Control power transformers.
■ Relays.
■ Contactor coils.
■ PLC I/O points.
■ Lighting circuits.
Features, Benefits
and Functions
■ Current limiting design provides fast
short circuit interruption that
reduces the let-through energy
which can damage the circuit.
■ Thermal-magnetic overcurrent
protection:
❑ Three levels, categorized by B, C
and D curves
❑ In direct relation to continuous
rating of device
– B Curve — 3 to 5X: Suited for
applications where maximum
protection is required for control circuits from low level short
circuit faults that could damage
the wiring.
– C Curve — 5 to 10X: Is posi-
tioned for medium inrush
startup currents, to provide
protection for small transformers, pilot devices, etc.
– D Curve — 10 to 20X: Provides
a magnetic range to allow for
higher inrush levels during
startup, that are usually seen
with motors, transformers and
other high inductive systems.
■ Color-coded status indicator
window — Red = ON or Green = OFF.
■ IP20 finger protection.
■ Provision for dual connection —
line and load:
❑ Fork or pin bus bars
❑ Cable direct into terminal
❑ Cable utilizing Ring Tung
connector
■ 35 mm DIN-rail mountable, utilizing
“extra strength” spring clip.
For more information visit: www.EatonElectrical.com CA08102001E
August 2006
Circuit Breakers & Supplementary Protectors
Current Limiting Supplementary Protectors
WMS
45-165
Features, Benefits
and Functions (Continued)
Field-Mountable Accessories
■ Quick 3-step process.
■ No tools required.
■ Auxiliary switch.
■ Combined auxiliary switch and
bell alarm.
■ Shunt trip.
■ Undervoltage release.
■ Fork and pin bus bar combs:
❑ Standards
– IEC 60947-1
– UL 1077
❑ Marking
–
❑ Length
– Short — 12 circuit
– Long — 1 meter
❑ Configurations include device
only plus device with 1/2 module
auxiliary or alarm switch
❑ UL/CSA File Number E197132
❑ Insulated bus bar
❑ Two caps supplied as standard
with all 2- and 3-phase bus bars.
Additional caps available as an
accessory
❑ Single pack
Standards and Certifications
■ UL recognized under UL 1077.
■ CSA 22.2.
■ IEC 898.
■ IEC 60947-2.
Accessory “Quick 3-Step”
Field Mounting
Three Steps to fitting any of the side
mounted accessories. No tools
required.
Before you do this, you should make
sure the device is in the OFF position
— check the handle position and
flag indicator.
Step One — Remove Left-Hand
“Accessory Window”
Step Two — Place the Accessory’s Clip
into the Device’s Positioning Groove
Product Specifications
The WMS Supplementary Protector
is a dual-rated product for both ac
and dc supplies, in accordance
with UL 1077, CSA 22.2 and IEC 898
standards and is marked with CE in
accordance with the Low Voltage
Directive. With this dual standard
product, the customer can include it
within their design, knowing that, in
the vast majority of cases wherever
their equipment is used, the product
is in line with the local UL, CSA or IEC
(European) requirements. This is very
important as the different areas of the
world market draw closer together
and the need for breakers that meet
different standards is a common,
everyday occurrence.
It is to be applied in conjunction with a
branch protector (if branch protection
is required) and can be a replacement
for similarly applied fuses. Its advantage over fuses is that it is resettable
and the device’s status is easily and
clearly identified by the position of
the handle and the flag indicator.
In addition to this, the user is able to
select a device that provides maximum reliability and accuracy to fit
their various applications (of which
there are many) due to the availability
of a wide range of current ratings from
0.5 to 60 amperes and three different
overcurrent characteristic curves, B,
C and D. With easy mounting of the
device on a 35 mm DIN-rail and also
the “Quick 3 Step” field mountable
accessories, it is now easier for the
customer to select and apply this
modular range. In addition, utilizing
the bus bar comb to connect multiple
devices from a single power source,
saves time as multiple wire connections are no longer required. Due
to the smaller modular width of
the device and accessories, it enables
them to save space in their panel
or equipment — which directly
leads to cost savings!
45
Step Three — Push the Blue Pivot Clip Up,
and Snap into Place
CA08102001E For more information visit: www.EatonElectrical.com
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