Samsung RRH-2WB, Руководство по установке, Страница: 9 / 141

Mobile WiMAX/TD-LTE RRH-2WB Installation Manual/Ver.2.0
© SAMSUNG Electronics Co., Ltd. VII
Caution
Power and Feeder line
Cautions while Cleaning Power Supply
While cleaning the power supply device, take caution that the device does not
come in contact with alien bodies that may cause power failure.
Handling the Power Cable
- Handling the power cable incorrectly may damage the rack or cause an electric
shock through the cable. Ensure the power switch on the rectifier or the system
is turned off before handling the power cable.
- The fixing materials for power cable must be tightly secured to prevent electrical
accidents.
Power cable
In case of using AWG8 (6 mm
2
× 2C) power cable, it is applicable up to 70 m
(299.66 ft). When the distance is 70 m (299.66 ft), followings should be considered.
- Do not rapid ON/OFF (within one second): The voltage loss value caused by the
cable resistance loss is 3 V, and the RRH-2WB could be damaged by the
counter electromotive force caused by the cable inductance.
- The battery’s life could be shorten: The RRH-2WB could be off in spite the
battery remains. (When the battery capacity is designed within one hour)
- Do not use the power cables linked: Using the power cables linked each other,
the loss will be increased.
Precautions for Measuring Insulation Resistance
Since a high voltage is used for measuring insulation resistance, insulation
resistance should not be measured when the system is in operation. Make sure to
only measure the insulation resistance of the appointed part. Other components
such as the system’s internal components and the unit (system frame),
components of the communication cables, units, etc. should not be measured.
Cable Work Sequence
When performing cable work for the system, proceed with the ground work before
any other work to prevent errors occurring due to static electricity and other reasons.
CAUTION