6.2 Installation
De-energize the system: When you are ready to start the installation work, turn off the main breaker
as well as each branch circuit breaker intended to be connected. Ensure that DELTA Pros are not
connected to the SHP as well.
6.2.1 Installing the Relay Module
The relay modules are shipped separately from the main unit. These modules include two switching
relays and a fuse. The fuse is for load circuit protection in the backup mode only and therefore should
match the current rating for the circuit breaker upstream of that load circuit. There are three standard
ratings for the modules,
corresponding to the load circuits that they plan to use it for according to the diagram below. The
diagram below shows the module position corresponding to the circuit number.
There are 10 module mounting spaces inside the SHP as shown below. 4 out of the 10 channels (channel
1-4) have a maximum of 30A current rating, the rest have a maximum 20A current rating. No load
circuit larger than the maximum current rating for a channel should be connected. Once placed into
position, two screws are used to secure the module into place.
It's easier if the knockouts are removed before the SHP is installed on the wall.
NOTE
The actual continuous current rating for each relay module is 80% of module rating. For example,
for the 20A relay module, the continuous current rating is 20A × 0.8 = 16A.
11
6A, 13A, 16A, 20A,
30A. Users should install these modules at the position