ELECTRONIC EARTHQUAKE INSURANCE POLICY
An earthquake generates two types of shock waves: the pressure waves (P-waves, which produce predominantly vertical accelerations) and the sheer waves (S-waves). The S-waves do all the damage but they travel from the earthquake epicentre more slowly than the P-waves.
Solid State's Earthquake Trigger continuously monitors the vertical component of the earth's acceleration due to seismic forces. It is designed to detect the faster moving P- waves and when the acceleration exceeds the pre-set level the output relay changes state until 7 seconds after the quake. Contacts on this relay may be used to initiate any desired action. The unit has an event counter mounted on the lid to record the total number of operations, including instrument test operations.
SOME OF THE APPLICATIONS
Power Supply Requirements:
AC OPTION: 230 V +/-10% 50 Hz Sinewave 3 VA
The AC option has NiCad battery back up.
UPS OPTION: This option is the same as above but using an on board inverter to provide uninterrupted power, for typically 5 minutes, during power cuts or power fluctuations.
DC OPTION 1: 24 V DC +/-20% at 15 ma standby.
DC OPTION 2: 110 V DC +/-20% at 15 ma standby.
The DC options do not have internal battery backup.
Sensitivity: Selected by internal switch to one of the following 0.012, 0.025, 0.05, 0.1, 0.2g. The sensitivity is to the vertical component of the acceleration.
Frequency Response: Flat from 0.3 Hz to 10 Hz (+/-3 dB). 10 dB down at 30 Hz.
Time: Relay fully actuated within 10 ms from the time the set acceleration
level is exceeded.
Test Button: Applies a test signal equivalent to a 0.2g earthquake to the input.
Event Counter: A 6 digit counter which records the total number of operations (tests and earthquakes).
Contact Ratings: OMROM LY2 RELAY. 10 A at 230 V AC, 3 A at 24 V DC resistive, 2 A at 24 V DC inductive, 0.6 A at 110 V DC resistive, 0.4 A at 110 V DC inductive.
Weight: 3 Kg
Size: 290 x 220 base (mm) 90 mm high
Construction: The unit is housed in a substantial cast aluminium housing with lid Painted with a white polyester finish.