2-4
Power Distribution
TN-S Five-Wire System
TN-S five-wire distribution systems are common throughout Europe, with
the exception of the United Kingdom and Germany. Leg to leg voltage
(commonly at 400V) powers three-phase loads. Leg to neutral voltage
(commonly at 230V) powers single-phase loads. Neutral is a current
conducting wire, and connects through a circuit breaker. The fifth wire is a
separate ground wire. There is a single connection between ground and
neutral, typically in the distribution system. There should be no connections
between ground and neutral within the system cabinets.
AC Line Voltage
In general all Allen-Bradley drives are tolerant to a wide swing of AC line
voltage. Check the individual specification for the drives you are installing.
Incoming voltage imbalances greater than 2% can cause large unequal
currents in a drive. An input line reactor may be necessary when line
voltage imbalances are greater than 2%.
L1
L2
L3
PEN or N
PE
Summary of Contents for Allen-Bradley 1305-AA02A
Page 4: ...ii Summary of Changes Notes ...
Page 40: ...2 18 Power Distribution Notes ...
Page 48: ...3 8 Grounding Notes ...
Page 68: ...4 20 Practices Notes ...
Page 78: ...6 8 Electromagnetic Interference Notes ...
Page 94: ...Glossary 4 UL Underwriters Laboratories ...
Page 100: ...Index 6 ...
Page 101: ......