Measuring Inputs - Siemens SENTRON PAC4220 Manual

2.2

Measuring inputs

Current measurement
NOTICE
Functional impairment of the power monitoring device
Use the device to measure alternating current only.
PAC4220 is designed for:
• Current measurement via external x/1A or x/5A current transformers.
• The measurement of direct currents is not possible.
• It may be necessary to adjust the current transformer ratio via the device menu or in
Powerconfig to the current transformers used, see chapter Parameterizing via the operator
interface. (Page 80)
• Follow the installation instructions for the current transformers used.
• The current direction can be changed for each phase individually. It is not necessary to
change the terminal connections of the current transformers in the event of connection
errors.
NOTICE
Directly connecting the current measuring inputs to the low-voltage system can cause
irreparable damage to the device
The device is designed for connection to the low-voltage system via external current
transformers. Only connect the current measuring inputs to the low-voltage system via
suitable current transformers.
Use the UL-listed current transformers if the device is to be used on the UL market.
Note
Suitable current transformers
You will find Siemens current transformers to suit your measuring requirements in the Siemens
product portfolio (4NC5x-xxxxx).
For further information, please go to: https://mall.industry.siemens.com/mall/de/WW/Catalog/
Products/8230427
Voltage measurement
NOTICE
Functional impairment of the power monitoring device
Use the device to measure alternating voltage only.
PAC4220
Equipment Manual, L1V30827278B-01
Description
2.2 Measuring inputs
21