Figure 15: Power cable terminals in the 93PS 40 kW frame with a separate
battery (option)
X1
Rectifier input
X4/2/-
External battery - for UPM1
X2
Bypass input
X4/4/-
External battery - for UPM2
X3
UPS output
TB20
External battery trip and aux signal
(N.O.) for UPM1
X4/1/
+
External b for UPM1
TB21
External battery trip and aux signal
(N.O.) for UPM2
X4/3/
+
External b for UPM2
PE
Protective earth
NOTE: External overcurrent protection is not provided by this product, but is
required by codes. Refer to Table 14: Minimum recommended multi-core cable
and fuse sizes for rectifier and bypass input and UPS output cables (3–phase
input, 3–phase output models) for wiring requirements. If a lockable output
disconnect is required, it must be supplied by the user.
Table 21: UPS power cable terminal torques
UPS rating
Function
Tightening torque [Nm]
93PS 8-20 kW
X1, X2, X3: L1, L2, L3, N
1.6
X4: b/-
3.0
© Eaton Corporation plc 2020. All rights reserved.
Revision: 006
Document ID: P-164000493
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Eaton 91PS/93PS UPS 8–40 kW
User’s and Installation Guide