Home > Frequently Asked Questions

Frequently Asked Questions

Q. What is a Surge Protective Device?​
A. A voltage dependent component, connected in parallel with load which limits current.

Q. What is the importance of SPD?
A. It protects the electrical system by limiting surge voltage while diverting surge current.

Q. Is it UL Listed?
A. Yes. It’s UL 1449-1985 Listed – 3rd Edition

Q.What are the available series of SPD?
A. 320, 330 and 510 series.

Q.What is the MCOV percentage value of SPD?​
A. 25% of nominal voltage

Q.What is the response time of SPD?​
A. Less than 0.5 ms.

Q.What is the operating voltage of SPD?
A. +/- 15% of nominal voltage.

Q. What is the definition of an ATS per UL1008?
A. ATS is a device that automatically transfer common load from a normal to an alternate supply in the event of failure of the normal supply and automatically returns the load to the normal supply when the normal supply restored.

Q. What does ASCO stands for?
A.  Automatic Switch Company

Q. Country of origin?
A. US made

Q. What are ASCO ATS product range?
A. Open Transition, Closed Transition, Delayed Transition, Softload Transition, and Open/Closed Transition with Bypass Isolation.

Q. What are the types of ATS in the Philippine Market?
A. Breaker Type, Contractor Type, Changeover Type and Solenoid.
Q.  A Closed Transition ATS is available for what ASCO ATS sizes?
A. 1600 amps to 4000 amps
Q. How fast is the transferring of OTTS?
A. From 20 to 90 ms.
Q. What is in-phase monitor/transfer?
A. Supply Voltage and Load Voltage

Q. Who is PRAMAC?
A. PRAMAC designs and manufactures light towers, portable and stationary generators and a full range of material handling products and in Partnership with Generac.

Q. Where it came from?
A. From Italy

Q. What are the engine of PRAMAC genset?
A. Volvo, MTU, Deutz, Yanmar, Perkins

Q. What kind of alternator does it use?
A. Mecc Alte or Leroy Somer

Q. What are the available ratings?
A. From 6.8kVA up to 3.9MVA

Q. How frequent maintenance should be performed?
A. Recommended is every 6 months


Q. Who is FG Wilson?
A. FG Wilson is a brand of generator set under Caterpillar Group of Companies

Q. Where it came from?
A. From U.K.

Q. What is the engine of FG Wilson genset?
A. Perkins

Q. What kind of alternator does it use?
A. In all Single phase- Leroy Somer
    11-25KVA- Leroy Somer
    33-200KVA- Marelli (Optional for Leroy Somer Alternator)
    200-1500KVA-Leroy Somer Alternator
Q. What are the available ratings?
A. 11KVA-1500KVA ( Three Phase)
     8.8KVA-100KVA (Single Phase)
Q. What is the lead time for this generator?
A. 3-4 Months ( China)
    5-6 Months ( U.K )


Would you like to sign up for our free webinar?

Click to register and learn for free!