4) Prepare wires based on the following table:
UPS Model
Wire Spec (AWG)
6K/6KL
10
10K/10KL
8
NOTE 1:
The cable for 6K/6KL should be able to withstand over 40A current. It is
recommended to use 10AWG or thicker wire for safety and efficiency.
NOTE 2:
The cable for 10K/10KL should be able to withstand over 63A current. It is
recommended to use 8AWG or thicker wire for safety and efficiency.
NOTE 3:
The selections for color of wires should be followed by the local electrical laws and
regulations.
5) Remove the terminal block cover on the rear panel of the module. Then connect the wires
according to the following terminal block diagrams:
Connect UPS and External Maintenance Bypass Switch Module
Remove the terminal block cover on the rear panel of the module. Then connect output
terminals of UPS to output terminals of switch module. Connect utility input terminals of UPS
to UPS input terminals of switch module. Connect signal slots of UPS and switch module with
control signal cable attached to the package.
Refer to the following terminal block diagrams:
NOTE :
Make sure that the wires are connected tightly with the terminals.
Put the terminal block cover back to the rear panel.
4. Operation
Transfer to Maintenance Bypass
To transfer to maintenance bypass from UPS, follow the below steps:
Step 1: Press “OFF” button of UPS unit to transfer to bypass mode.
Step 2: Open the maintenance switch cover. If step 1 is not executed first, then UPS unit will
transfer to bypass mode automatically with control output signal connection when opening the
maintenance switch cover.
Step 3: Transfer rotary switch to “BPS” position and switch off UPS input breaker on the
module. Then, all devices are directly powered by utility and there is no current through the
UPS. The output and input of UPS are isolated from the system. You may now service or
maintain the UPS by shutting down the batteries of UPS.
Transfer to UPS Protection
After maintenance service is done, follow below steps to transfer back to UPS operation.
Step 1: Switch on the input breaker of the module and reconnect UPS battery input breaker.
Then UPS will enter to bypass mode.
Step 2: Transfer rotary switch to “UPS” position. Then, all devices are powered by utility
through UPS bypass mode.
Step 3: Close back maintenance switch cover and press “ON” button of UPS unit. Then, all
devices are protected by the UPS.
NOTE:
If maintenance will be executed in another place, before removing the UPS and the
module, please follow steps of “Transfer to Maintenance Bypass” and then disconnect all wires
between UPS and the module for complete isolation.
5. Specification of Critical Components
Parameter
Max.
Input breaker
Current
63 A
Voltage
250 V
Bypass switch
Current
63 A
Voltage
690 V
Input/Output terminal
Current
60 A
Voltage
600 V
UPS
Maintenance
Bypass Switch
Module
Ground
Ground
Output Line
Output Neutral
Ground
Input Neutral
Input Line
