Cutler-Hammer WMS supplementary protectors are used to provide overcurrent protection where branch circuit protection is installed upstream in the power circuits. With Cutler-Hammer thermal magnetic technology, these are ideal protection against short circuit and overload conditions. Since the WMS series is dual rated for AC and DC supplies, it can be installed in most applications including replacement for fuses.

Choose from a complete product line of supplementary protectors. 1, 2, and 3 pole configurations are available from 2 A to 60 A utilizing B and D type trip curves. B curve trips operate at 3 to 5 times the rated current and are typically used with PLC’s, industrial computers, communication equipment and other low inrush type loads. D curve trips operate at 10 to 20 times the rated current for higher inrush current devices such as motors and transformers.

Shunt trips modules are offered for remotely triggering the device. Auxiliary contact module allows a contact for remote monitoring the protector. Lastly, lockout attachment and product labels round out the complete product line.

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: Two levels, categorized by B and D curves in direct relation to continuous rating of device
• B Curve — 3 to 5 X rated current — Suited for applications where maximum protection is required for control circuits from low level short circuit faults that could damage the wiring.
• D Curve — 10 to 20 X rated current — 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
• Cable direct into terminal utilizing ring tung connector
• 35 mm DIN rail mountable, utilizing “extra strength” spring clip

Standards and Certifications

• UL recognised under UL 1077
• CSA 22.2
• IEC 898
• IEC 60947-2