Siemens SENTRON PAC3100, Manual, Page: 61 / 152

Commissioning
7.5 Applying the measuring current
SENTRON PAC3100
Manual, 07/2009, A5E02385159B-01
61
CAUTION
Observe limit values
The limits given in the technical data or on the type plate must not be exceeded even at
startup or when testing the device.
Measurement of DC voltage is not possible.
External voltage transformers are required to measure higher voltages than the permissible
rated input voltages.
See also
Measuring inputs (Page 17)
Safety notes (Page 13)
Safety notes (Page 39)
Applying the supply voltage (Page 51)
7.5 Applying the measuring current
The device is designed for connection of current transformers with secondary currents of
5 A. It is only possible to measure alternating currents.
The current measuring inputs can each be loaded with 10 A (max. 300 V) continuously or
with 100 A for 1 second.
DANGER
Open transformer circuits will result in electric shock and arc flashover
Will cause death, serious injury or considerable property damage.
Only measure current with external current transformers. Do not use fuses for circuit
protection. Do not open the secondary circuit under load. Short circuit the secondary
current terminals of the current transformer before removing this device. The safety
information for the current transformers used must be followed.
CAUTION
Do not measure direct currents
Direct currents cannot be measured with the device.