A whole new circuit breaker from Weidmuller

Weidmuller move to the head of the class for electric safety devices with their new Magnetic-Hydraulic HB-Series Miniature Circuit Breakers from a technology, performance and price perspective. Here are some of our favorite points on this exciting new series:

Point 1: Immediate Reset
Industry standard breakers feature a thermal element tripping system, which cannot be reset until the breaker has cooled down after a fault. The new universal-voltage HB-SERIES circuit breakers boast an advance hydraulic electromagnetic tripping mechanism that contains no thermal element, therefore it does not require a "cooling off" period and can be reset immediately after tripping to clear a fault.

Point 2: Not temperature dependent
Magnetic-hydraulic breakers are tripped by current directly, whereas thermal breakers trip as a result of current thermoelectrically acting on a bimetallic strip that will physically bend when a certain temperature threshold is reached. In normal operating conditions both breakers can be used effectively; however, as they are not temperature dependent, magnetic-hydraulic breakers are best suited for applications with a wide range of thermal variation.

Point 3: Multiple time delay curves for each current rating to avoid "nuisance trips"
Weidmuller's HB-Series breakers are calibrated for specific currents ranging from 0.5A to 32A. Each current value in turn has instantaneous, short, medium, and long delay options - where the delay is a calibrated "time delay" (Time Delay in this case is the time it takes an electromagnetic coil to push an iron core through the hydraulic fluid to reach the actuator and trip the breaker). This comes into play with equipment that upon start up has a large inrush current. If the breaker is instantaneous, the large inrush current will trip the breaker and shut off the equipment. Therefore, a calibrated delay response is needed to accommodate for the inrush current without tripping the breaker and cutting off a vital piece of equipment.

Point 4: Lower cost
Traditionally, magnetic hydraulic breakers come with a high sticker price. Weidmuller breaks from this tradition with an affordable well-made series of breakers loaded with features.

Other key features: Universal-voltage ranges (VUC), enhanced arc protection (multi-stage arc extinguishing chamber), flame retardant casing, vibration and shock resistance, finger safe terminals, superior wire and ferrule retention, and visual operational indicators that conform to industry requirements. (web cutsheet)

To learn how the HB-Series can protect your most critical circuits and reduce down time following a fault, please inquire with our sales team at (503) 233-5341 - sales@ursele.com.

Single slice of a 20A HB-Series Miniature Magnetic Hydraulic Circuit Breaker