Parallel Operation - INFOSEC UPS SYSTEM E4 700 Mode D'emploi

3. To complete the connection plug the connector of the external battery cable into the external battery
outlet at the back of the UPS. Then switch the breaker of the battery pack to "ON" position. Then
switch the bypass breaker to "ON" position. The UPS begins to charge the battery packs.
Outlet to be connected
to the UPS

10.4 Parallel operation

10.4.1 Brief introduction of the redundancy
N+X is currently the most reliable power supply structure. N represents the minimum UPS number that the
total load needs; X represents the redundant UPS number, i.e. by default the UPS number that the system
can handle simultaneously. The bigger the X is the higher the reliability of the power system will be. When
reliability is essential, N+X is the optimal mode.
As long as the UPS is equipped with parallel cables, up to 3 UPS can be connected in parallel to realize
output power sharing and power redundancy.
10.4.2 Parallel installation
1. Users need to opt for a standard 25-pin communication cable, which should have 25 cores,
corresponding stitches and shield, as the UPS parallel cable. The length of the parallel should not be
less than 3 m.
2. Strictly follow the stand-alone wiring requirement to perform the input wiring of each UPS.
3. Connect the output wires of each UPS to an output breaker panel.
4. Disconnect first the Jumper between JP1 and JP2 then connect each input breaker to a main input
breaker and each output breaker to a main output breaker and then to the loads.
10.4.3 Requirement for output wiring
When the distance between the UPS in parallel and the breaker panel is less than 20 meters, the
difference between the wires of input & output of the UPS is required to be less than 20%.
When the distance between the UPS in parallel and the breaker panel is greater than 20 meters, the
difference between the wires of input & output of the UPS is required to be less than 10%.
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Hot Line:
INFOSEC UPS SYSTEM - 4, rue de la Rigotière – 44700 Orvault – FRANCE - www.infosec.fr
tel : + 33 (0)2 40 76 15 82 - fax : + 33 (0)2 40 94 29 51 - hotline@infosec.fr - 09 05 04 205 12
Blue & brown wires to be connected to
the positive pole of the battery pack output
Black & white wires to be connected to
the negative pole of the battery pack
output
Green and yellow wires to be connected to the ground
of the battery pack