There is a wide range of products that could be used with the mentioned UPS. Mainly the protection scheme should contain a circuit breaker for overload and short-circuit protections as well as surge protective devices.
Generally, You are advised to choose breakers according to ratings from the Acti 9 range as well as a SPD from the same Acti 9 range. you should return to the manufacturer manual of this UPS to know their recommended ratings for the above mentioned protective devices.
As for the surge protective device, the choice is based on many parameters; like earthing system and pole configuration.SPDs selection is based on the customer to choice according to his need (earthing system, pole configuration...etc).