9
Safety Rules
For example: feeding a voltage of 300 V to the low-voltage winding of a
power transformer that has a ratio of 400000 V : 30000 V, induces a voltage
of 4000 V in the transformer's primary winding.
• Do not operate the CP SB1 under ambient conditions that exceed the
temperature and humidity limits listed in 4 "Technical Data" on page 53.
• Make sure to position the test equipment on dry, solid ground.
• Do not operate the CP SB1 in the presence of explosives, gas or vapors.
• Opening the CP SB1 invalidates all warranty claims.
•If the CP SB1 or any add-on device or accessory does not seem to function
properly, do not use it anymore. Please call the OMICRON electronics
hotline.
• Before handling the CP SB1 or CPC 100 in any way, connect them with a
solid connection of at least 6 mm
2
cross-section to equipotential ground.
Ground the CP SB1 as close as possible to the CPC 100.
DC Output to Test Objects with a High
Inductance
When using the DC Output to test power transformers with a high inductance,
observe the following safety instructions:
•Use the TRTapCheck (tap changer winding resistance and on-load tap
changer interruption check) test card only.
• As long as the CPC 100 software shows the on-screen message "Switch off
in progress", NEVER connect or disconnect test objects and/or cables.
• The message "Switch off in progress" notifies you that, while the CPC 100 is
deactivating, the connected external inductance (this means the test object)
still "feeds" voltage potential back into the 6 A DC output.
Note: The existence of this voltage potential at the 6 A DC output is also
indicated by a lit LED - even if the CPC 100 is switched off.
• If a test object with a high inductance was connected to the CPC 100, short-
out the test object additionally before disconnecting any cables.
High-Voltage Outputs
All AC and DC output sockets of the CP SB1 can carry life-hazardous voltage
potential and provide life-hazardous currents. Therefore:
• While connecting cables to the CP SB1 outputs or other conducting parts
that are not protected against accidental contact, press the Emergency Stop
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General