Alpha Technologies Continuity: 6K_10K - Manual (Page 43)

0170012-J0 Rev A Page 41
Appendix B Parallel System Installation
The Continuity 6K and 10K can be connected in parallel to provide N+1 redundancy with up to 3 units in parallel
plus one redundant.
B.1. Important Safety Instructions
• Parallel function of the UPS can only be enabled in the Normal mode operation.
• Prior to a parallel installation, ensure the tolerance of the output voltage of each UPS at zero-load condition is
less than 0.5Vac. Consult your authorized dealer if any of the UPS output voltage has a tolerance over 0.5Vac.
• Ensure the RJ45 communicating wire is connected securely during parallel mode to avoid damage to both the
UPS and the output devices.
• Ensure the terminal resistors on the rear panel of the 2 units of UPS in parallel are set to the ON position. With
3 UPS units in parallel, only UPS 1 and 3 terminal resistors are set to ON. With 4 UPS units in parallel, only
UPS 1 and 4 terminal resistors are set to ON.
• Note that only a UPS with the same rating and type can be installed in parallel. For instance, a UPS without a
galvanic transformer cannot be connected in parallel with a UPS with a galvanic transformer. While installing
these UPS, add a 40A/250VAC and 30A/250VAC NFB (Non-fuse Breaker) at the input and output of each
UPS. The NFB prevents any potential hazard when the UPS is in the maintenance mode.
B.2. Preparation for Installation
B.2.1. Unpacking
Check for the following accessories:
 1 set of RJ-45 communication cables for parallel system (C1, C2)
 1 set of metal brackets (F1)
 1 set of cable ties (T1 or T2 and T3)
T3 X 1
X 1 C1
X 1 C2
X 1 F1
T2 X 4
T1 X 6