IPSI P.O. Box 92384 Rochester, New York 14692 In the USA Tel. 1.800.959.4724 Fax: 585.359.9061 Contact IPSI International Tel. +001-585-334-5803 Fax. +001-585-359-9061

*Transfer Action
Independent break-before-make action positively prevents dangerous source-to source connections.

*Mechanical Interlock
Prevents simultaneous closing of normal and emergency contacts.

*Surge Withstand Ratings
Guidelines for location. Surge test waveforms for location category B3, per IEEE C62.41. Testing per guidelines in IEEE C62.45

*Electrical Interlocks
Prevents simultaneous closing signals to normal and emergency contacts and interconnection of normal and emergency sources through the control wiring.

*Environmental
--Operating Temperatures: -40 degrees F to 122 degrees F
--Storage Temperatures: 140 degrees F to 140 degrees F
--Humidity: 95% relative humidity, non-condensing
--Altitude: up to 10,000 ft without derating.

Start Time Delay: 3 sec., Prevents nuisance generator set starts during momentary utility power variations.

Transfer Time Delay: 3 sec., Allows generator set to stabilize before load is applied.

Retransfer Time Delay: 5 min., Prevents needless power interruption if return of utility power is momentary.

Stop Time Delay: 5 min., Allows for gradual generator set cool down.

Undervoltage Sensing: Normal & Emergency:
-Pickup: 85% of nominal
-Dropout: 75% of pickup
Provides reliable sensing of utility power to start the generator set in brownout conditions. Reliably maintains connection through motor starting voltage dips.