SNR UPS-ONRT-25-INTXL33 [18/53] Open the back door of the cabinet remove the plastic cover the input and output

SNR UPS-ONRT-25-INTXL33 [18/53] Open the back door of the cabinet remove the plastic cover the input and output
Installation Instruction
14 HR33 Rack Mounted UPS 25KVA User Manual
Port
Connection
Bolt
Bolt Aperture
Torque Moment
Mains input
Cables crimped
OT terminal
M6
7mm
4.9Nm
Bypass Input
Cables crimped
OT terminal
M6
7mm
4.9Nm
Battery Input
Cables crimped
OT terminal
M6
7mm
4.9Nm
Output
Cables crimped
OT terminal
M6
7mm
4.9Nm
PE
Cables crimped
OT terminal
M6
7mm
4.9Nm
3.4.3 External breakers specifications
UPS external air breaker recommendations are shown in table 3.4.
Table 3.4 UPS external breaker recommendation
Model
Input
Bypass
Battery
25KVA3/3
NDB1C-63D63A/3P
Nader
NDB1C-63D63A/3P
Nader
DC 100A/3P
20KVA3/1
NDB1C-63D50A/3P
Nader
NDM1-125D100A/2P
Nader
DC 80A/3P
Attention
The CB with RCD (Residual Current Device) is not suggested for the system.
3.4.4 Connecting Power Cables
The steps of connecting power cables are as follows:
1. Verify that all the switches of the UPS are completely open and the UPS internal
maintenance bypass switch is open. Attach necessary warning signs to these
switches to prevent unauthorized operation.
2. Open the back door of the cabinet, remove the plastic cover. The input and output
terminal, battery terminal and protective earth terminal are shown in Fig.3-4
Fig.3-4 connections terminals
3. Connect the protective earth wire to protective earth terminal (PE).
4. Connect the AC input supply cables to the Input terminal and AC output supply
cables to the Output terminal.
5. Connect the Battery cables to the Battery terminal.

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