Siemens SENTRON PAC3100 Manual page 44

Connection
6.2 Connections
Supply voltage fuse protection
Non-fused supply voltage may lead to device and equipment damage
Damage to the device and the equipment may occur.
Always protect the device with an IEC approved or UL listed CLASS CC 0.6 A fuse.
If a fusible link is used, a suitable IEC approved or UL listed fuse holder has to be used. In
addition, a suitable isolating device shall be connected upstream in order to permit
disconnection of the device from the power supply.
Protecting the current measuring inputs
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.
Protecting the voltage measuring inputs
Non-fused voltage measuring points may lead to device and equipment damage.
Always protect the device with an IEC approved or UL listed 10 A fuse, circuit breaker or
supplementary protector.
Never short circuit the secondary connections of the voltage transformers.
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CAUTION
DANGER
CAUTION
SENTRON PAC3100
Manual, 07/2009, A5E02385159B-01