Where are shunt trip breakers required?

Where are shunt trip breakers required?

RE: when are shunt trip breakers required 1 (Safety Code for Elevators and Escalators) requires their use for the shutdown of the elevator motor(s) in elevator machine rooms protected by an automatic fire sprinkler system.

How does a shunt trip work to trip a circuit breaker?

The shunt trip is an optional accessory for a circuit breaker for added protection to your system. It is designed to connect to a secondary sensor. It will trip the breaker automatically if the sensor is triggered. It can also be activated via a remote switch that you can install.

Does an elevator need a shunt trip breaker?

2 (Safety Code for Elevators and Escalators) and the NEC 620.51(B) require power to an elevator be shut down prior to the release of water in the elevator shaft or machine room. This is typically accomplished by a shunt-trip device. NEC 620.16(B) and 110.10 require a sufficient SCCR for the available fault current.

Where do you mount a shunt?

Physically, the shunt should be mounted such that the manganin resistive elements are oriented vertically to ensure proper cooling. In the case of our base mounted models, a good way to remember this is that the shunt should be mounted to a wall or panel and not the floor or ceiling.

What is the purpose of shunt trip breaker?

The shunt trip breaker is a combination of the shunt trip accessory and the main circuit breaker. This installs on the main breaker to add protection to your electrical system. This adds security to your electrical system as it manually or automatically cuts the electric supply in your circuit.

How to choose the best Cutler Hammer circuit breakers?

PG.74A.01.T.E Cutler-Hammer 1 Circuit Breaker Electronic Catalog Navigation Chart of Attached CD-ROM . . . . . . . . . . . .192 Product Guide Selection Data Time Current Curves Dimensions Miniature and Molded Case Circuit Breakers Table of Contents Miniature Circuit Breakers Selection Guide 2 QUICKLAG Industrial Circuit Breakers

What do Eaton molded case circuit breakers do?

Eaton’s molded-case circuit breakers are designed to provide circuit protection for low voltage distribution systems.

How to shunt trip in left accessory tray?

and/or Shunt Trip in Left Accessory Tray Proceed with the following seven steps: Step 1: If necessary, remove the front cover from the breaker by first performing Steps 1 and 2 of Section 2. Step 2: Locate the left accessory tray behind the trip unit and disconnect the appropriate secondary connections as described in Section 6. Figure 19.

When does an undervoltage release open a circuit breaker?

Undervoltage Release (UVR) The undervoltage release opens the circuit breaker when its supply voltage falls to between 35 – 60% of rated voltage. If the release is not energized to 85% of its supply voltage, the circuit breaker cannot be closed electrically or manually (see Table 2). It is supplied with orange