Figure 2.18 Display Main Screen
11. Reconnect the EPO connector.
2.4 UPS Installation for Parallel System
The parallel system of MTP 20kVA, 40kVA, and 80kVA can be composed of up to four (4) UPSs of the same power rating and
connected in parallel without the need of a centralized mains static bypass. Instead, in case it is necessary to supply the load
from Bypass source, the bypass static switches of each UPS will share the load.
In order to correctly operate, a parallel system requires to share control signals among the UPSs to manage the load sharing,
synchronizing and bypass switching.
In addition, it is requested that:
1. The UPSs are of the same model and power rating and have the same Firmware version.
2. The bypass and rectifier input supplies must use the same neutral line input terminal.
3. If the input has a current leakage protective device, the current leakage protective device must be fitted
upstream of the neutral line input terminal.
4. The power cables (including the bypass input cables and UPS output cables) of each UPS should be of the same
length and specifications to facilitate the load sharing.
5. The Bypass supply should be the same for all the UPSs in parallel.
Moreover, in case of a Parallel system, it is suggested to have:
1. Independent output breaker for each UPS.
2. All Output breakers connected to a major output breaker.
3. External Maintenance Bypass line and breaker.
If the UPS is only for single operation, you may skip this section.
1. Install and wired the UPS. See Single UPS Installation on page12 .
2. Connect the output wires of each UPS to an output breaker.
3. Connect all output breakers to a major breaker. This major output breaker will connect directly to the loads.
4. Either common battery packs or independent battery packs for each UPS are allowed.
5. See Figure 2.19 on the facing page .
22 Proprietary and Confidential ©2024 Vertiv Group Corp. 2 Installation and Operation
Vertiv™ Liebert® MTP Online UPS User Manual 20-40-80kVA
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