Unique Broadband Systems Ltd. DRU2KW ユーザーズマニュアル

Manual No. x75mk3-11

x75-man-Rev11-0815.indd

 

Note that until AC power is applied to the system the controller will not activate the 

LVD contactor.

 

Perform the following operations:

1. 

Set the battery and all load circuit breakers to the OFF position.

 

For systems with GMT fuse distribution remove all fuses if already installed.

2. 

Plug in the rectifier modules.

3. 

Connect the AC power cables to the AC source.

4. 

Check that the green LED on the front panel has lit.  After approximately 20 

seconds for initialization the MAJA LED at least will light.  The RFA LED 

may also light, dependent on the number of rectifiers installed at the time.

5. 

Set the battery circuit breaker to the ON position.  Then set the load breakers 

to the ON position and/or insert the GMT fuses.

 

After approximately 5 seconds the status of various alarm LEDs will change, 

dependent on the number of rectifiers installed.

 

Using the WEB browser interface described in section 13 it is now possible to check 

overall system status for correct operation.

 

In particular, it is important to ensure that the load current reading does not exceed 

the maximum capacity of the installed rectifiers or, where N+1 operation is required, 

the maximum capacity of one less than the total number of rectifiers installed.  Note 

also, that the system should have been sized so that a proportion of the available 

rectifier capacity is allocated for battery charging.  Where N+1 redundant operation 

is used the additional ‘spare’ rectifier will normally provide this current.

IMPORTANT NOTES:

a) 

It is not possible to start the system by connecting the batteries alone.

b) 

During the 30 seconds initialization period the system bus voltage will be at the 

factory preset level of the rectifiers; nominally 54.4V, 27.2V or 13.6V depending 

on system voltage.   After this period the internal controller will lower the output 

voltage by approximately 15% in order to limit current flowing to the batteries.  

During a following period of approximately 30 minutes the controller will ramp 

the system voltage up to the correct float voltage as determined by the temperature 

compensation algorithm.

 

This ‘walk-in’ function can be disabled via the controller WEB interface if it not 

required.