Which statement about power transfer times is correct?

Which statement about power transfer times is correct?

• A. Protected premises 60 seconds; supervising station 10 seconds
• B. Protected premises 10 seconds; supervising station 60 seconds
• C. Both 30 seconds
• D. Both 90 seconds

Answer: (B)

Power transfer time is how quickly the fire alarm control panel switches from its main power to its standby power when the primary supply fails. This switch needs to happen fast for the protected premises so that local signaling and ongoing operation aren’t interrupted, which is essential for occupant safety. Therefore, the transfer should occur in a short window—about 10 seconds—to keep the building’s alarms and devices alive without a noticeable gap. For a supervising station setup, the system can tolerate a longer switchover, around 60 seconds, since the emphasis is on ensuring the central monitoring service remains aware of system status rather than maintaining immediate local operation. So the pairing is protected premises in about 10 seconds and supervising station in about 60 seconds.

Power transfer time is how quickly the fire alarm control panel switches from its main power to its standby power when the primary supply fails. This switch needs to happen fast for the protected premises so that local signaling and ongoing operation aren’t interrupted, which is essential for occupant safety. Therefore, the transfer should occur in a short window—about 10 seconds—to keep the building’s alarms and devices alive without a noticeable gap. For a supervising station setup, the system can tolerate a longer switchover, around 60 seconds, since the emphasis is on ensuring the central monitoring service remains aware of system status rather than maintaining immediate local operation. So the pairing is protected premises in about 10 seconds and supervising station in about 60 seconds.