Siemens 7KM1020-0BA01-1DA0, Manual, Page: 29 / 94

Connection
4.1 Safety instructions
PAC1020
Equipment Manual, 05/2020, L1V30610008B-01
27
Note
Only qualified personnel are permitted to install, commission or service this device.
• Wear the prescribed protective clothing. Observe the general equipment regulations and
safety regulations for working with high-voltage installations (e.g. DIN VDE, NFPA 70E as
well as national or international regulations).
• The limits given in the technical data must not be exceeded even during commissioning or
testing of the device.
• The secondary connections of intermediate current transformers must be short-circuited
at the transformers before the current feeder cables to the device are interrupted.
• Check the polarity and the phase assignment of the instrument transformers.
• Before connecting the device, make sure that the line voltage matches the specifications
on the rating plate.
• Prior to commissioning the device, check that all connections are correct.
• Before power is applied to the device for the first time, it must have been located in the
operating area for at least two hours in order to reach temperature balance and avoid
humidity and condensation.
• Condensation on the device is not permissible during operation.
Note
Grounding of transformers
The current transformers must be grounded on the secondary side.
Note
Prevent capacitive and inductive interference
Make sure that all data and signal cables are routed separately from control and power supply
cables. In order to avoid the risk of capacitive or inductive interference, these cables must
never be routed in parallel.