The QUICK-TRIP® system is a manually controlled arc flash reduction system. It can reduce trip times when turned on and allows selective coordination between circuit breakers when turned off. If maintenance personal must work on energized equipment, they will first turn the QUICK-TRIP® system on at the breaker feeding the equipment. If a fault occurs, the upstream breaker will trip quickly based on the QUICK-TRIP® settings reducing the arc flash hazard to personnel.
The QUICK–TRIP® settings are separate ground fault (QT GF) and instantaneous (QT I) settings in the AC–PRO® and AC–PRO–II®. The QT GF & QT I have the same ranges as the regular GF and I settings in the AC-PRO® and AC-PRO-II®. The settings are dormant until the QUICK–TRIP® switch is turned ON. When the switch is turned back OFF the AC–PRO® and AC–PRO–II® returns to its original settings.
Example: A feeder breaker needs to be racked out for maintenance. Before opening the cubicle, QUICK–TRIP® would be activated on the main. If an incident occurs during the racking out, the main would trip on the QT GF or QT I instead of the standard settings. Since the main tripped faster than usual, the amount of energy build up would be less and the arc flash would be reduced.
A reduction in arc flash incident energy levels may permit lower PPE clothing for maintenance personal.
The QUICK-TRIP® system for AC-PRO® comes with the QT-Display, QT-switch with a padlockable cover and all the necessary mounting hardware and cables. The QT-Display is a read only device that extends the use of the AC-PRO® to a more convenient and safe location for personnel to view the continuously displayed 3-phase current, the "PICK-UP" LED, "Self-Test" LED and review last trip data and unit settings. All of this can be done without opening the cubicle door.
The AC-PRO® ,QUICK-TRIP® switch, and display only work with the AC-PRO®. They do not work with any other URC products.
QUICK-TRIP® system Features
- Installs using standard punches
- Very easy to wire in
- QT settings are dormant until activated
- Preserves coordination when QT is off.
- Kirk Key integration available
- Lockable switch for inclusion in LOTO procedures
- QT is fully powered by the CT's, no auxiliary power or batteries needed
- QT switch has extra connectors for an external annunciator
The QUICK-TRIP® system is a manually controlled arc flash hazard reduction system. It can reduce trip times when turned on and allows selective coordination between circuit breakers when turned off.
If maintenance personnel must work on energized equipment, they will first turn the QUICK-TRIP® system on at the upstream breaker feeding the equipment or breaker. If a fault now occurs, the upstream breaker will trip quickly based on the QUICK-TRIP® settings reducing the arc flash hazard to personnel. When the maintenance work is finished, the QUICK-TRIP® system is turned off and the original selective coordination is back in effect.
The AC-PRO-II®, QT-SWITCH, only works with the AC-PRO-II®. It will not work with any other URC products.
The QUICK-TRIP® system consists of the following
- AC-PRO-II® trip unit.
- AC-PRO-II® QUICK TRIP® Switch: (URC Part #QT2-SWITCH) consisting of Padlockable QUICK-TRIP® On/Off toggle switch, QUICK-TRIP® On LED, Push-to-Verify button, Remote Switch Terminals, and Remote Indication Terminals.
- 4/C QUICK-TRIP® cable with connectors.
When QUICK-TRIP® is on, the following settings are enabled:
- I QUICK-TRIP® (I QT)
- GF QUICK-TRIP® (GF QT)
These are standard AC-PRO-II® settings. All other settings remain in effect.