The TEY is a 1 in W per pole, compact, ''bolt-on'' circuit breaker for use on grounded 480Y/277 VAC systems. the bolt-on mounting base accessory makes the TEY suitable for varied applications as a lug-lug breaker. all TEY circuit breakers feature quick-make quick-break mechanisms, common trip bars and easy to spot trip indication to ensure safety and reliability. TEY breakers are available in 1, 2 and 3-pole versions and can be ordered with auxiliary contact and shunt trip accessories.