Table of Contents
Advertisement
Eaton 91PS/93PS UPS 8–40 kW
Figure 22. Principle of paralleled UPS systems
A
Bypass inputs to UPSs
B
Outputs from UPSs
C
Load
The required parallel system wiring length must be equal to ensure
approximately equal current sharing when in the bypass mode.
For proper operation, the following must be true: 1A+1B=2A+2B=3A+3B=4A
+4B.
Any differences in wire length result in decreased capacity and improper
operation of the UPS system while in the bypass mode.
5.6.2
2 controls signals (External CAN Network, Bypass Pull-Chain) are required for
external paralleling. Both of these control signals are fault-tolerant and alarmed
when disconnected.
External CAN (ECAN)
©
Eaton Corporation plc 2018. All rights reserved.
Control signals overview
1
UPS 1
2
UPS 2
3
UPS 3
4
UPS 4
5
Battery
6
Battery
Revision: 005
Document ID: P-164000493
User's and installation guide
7
Battery
8
Battery
9
MOB1
10
MOB2
11
MOB3
12
MOB4
66 (117)
Advertisement
Table of Contents
