How does a shunt trip breaker operate?
Shunt trip breakers essentially provide an off switch remotely or a direct link to a system outside the main breaker. For instance, when smoke triggers a smoke detector, the breaker trips automatically. This cuts the power to electrical equipment at the same time the smoke detector triggers the sprinkler.
How does a shunt trip coil work?
A shunt trip device is an optional accessory in a circuit breaker that mechanically trips the breaker when power is applied to the shunt trip terminals. The power for the shunt trip does not come from within the breaker, so it must be supplied from an external source.
Where are shunt trip breakers required?
Generally, most commercial kitchens, elevators, and offices have this shunt trip breaker because it is required. Commercial kitchens use this device in compliance with ANSI/ASME CSD-1, while elevators and escalators comply with ASME A17.
What is shunt trip in Mccb?
The shunt trip is used to disconnect the main power supply to the circuit it is connected within case an electrical signal is received. Whenever a shunt trip device receives a signal from the current transformer it is tripped. These devices are factory fitted with a switch which is the cut-off supply switch.
What is a shunt switch?
In electronics, a shunt is a device that creates a low-resistance path for electric current, to allow it to pass around another point in the circuit. The origin of the term is in the verb ‘to shunt’ meaning to turn away or follow a different path.
What is the use of shunt trip coil in Mccb?
The shunt trip is used to disconnect the main power supply to the circuit it is connected within case an electrical signal is received. Whenever a shunt trip device receives a signal from the current transformer it is tripped.
Do you need a shunt trip breaker wiring diagram?
If you have a compatible system, you still need a shunt trip circuit breaker wiring diagram to ensure correct installation. However, do not just download any chart from the internet. For example, if you have a Square D branded circuit breaker, you need a Square D shunt trip breaker wiring diagram.
Which is the shunt trip on the left accessory tray?
The left accessory tray will accommodate a maximum of four accessory devices as follows (see Figure 1): • Zero or two (OTS); • Zero or one (UVR); • Zero, one, or two (ST); and • Combination (one ST and one UVR). Shunt Trip (ST) The shunt trip opens the circuit breaker when its coil is energized by a voltage input (see Table 1).
What’s the maximum voltage of a shunt trip?
As the breaker trips, the molded crossbar moves away from the cutoff switch, disconnecting power to the solenoid and prevent- ing coil burnout. operations per minute: 5 Maximum operating voltage: 110% of maximum voltage range rating ST a YEL WH Figure 1-1 Shunt Trip Kit.
Where to install an overcurrent trip switch ( OTS )?
A UVR should only be installed in the right side of the tray. Overcurrent Trip Switch (OTS) An overcurrent trip switch (bell alarm) provides an electrical indication when a circuit breaker trips as a result of the trip unit reacting to an overcurrent condition.