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The tripping temperature is set to 105℃. When the oil temperature reaches the value,
tripping signals will be sent to the intelligent power distribution cabinet or a communication
unit provided by the Sungrow. At the same time, the transformer will be disconnected from
the upstream and downstream devices.
8.14 Load Switch
The pad-mounted transformers Sungrow supply have the load switch. This switch is on-load
operated switches. To operate the switch the hot stick tool is placed in the feed-switch and
turned to the desired position.
There are normally 2 kind of load switches for the transformer.
Do not operate the load switch when the transformer is under load.
8.14.1 Two Position Load Switch
The two position load switch shown in below.
The two position load switch is a gang operated load break switch. It is operated by hot stick
and uses a manually charged over toggle storage spring assembly that is independent of
operator speed. The spring loaded operating mechanism ensures quick load breaking and
load making operation. It can be used to de-energize the transformer.
8 Components and Accessories User Manual
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