Xylem IM244R04 SPD Plus Variable Speed Pump Control - Manual (Page 16)

16
SECTION 6: POWER SUPPLY AND WIRING
(CONTINUED)
CONDUIT, WIRE AND FUSE SIZING
When selecting the input power cable follow the rules
below:
• Do not use aluminum wires
• The cable must be able to carry the drive load
current
• The cable must be rated for at least 75ºC
• A four conductor cable (three phases and ground)
or four insulated conductors routed through
conduit may be used. Shielding is not required.
The use of metal conduit with metal conduit
connectors is recommended for all electrical
connections. Use the NEC or CEC to determine
the required conduit size for the application.
Refer to the wire sizing tables in Appendix B to
determine the maximum length for the input and
output cables. The maximum recommended total
voltage drop on both input and output cable
combined is 5%. Standard wire sizing table provides
maximum cable lengths for input or output cables.
Because of this the lengths given in the table must be
adjusted so the total voltage drop does not exceed
5%. For example, if the input wire sizing chart in the
appendix gives the maximum length of 400' and
only 100' is used then only 25% of the total voltage
drop (1.25% drop) is used. The maximum output
cable length must then be adjusted to 75% of its
value so that the maximum voltage drop of 5% is not
exceeded.
Provide a dedicated fused disconnect rated for drives
input current rating. (Fused disconnect included for
NEMA3R enclosures.) No other equipment should be
used for this disconnect. Use fast acting class T fuses.
The recommended fuse sizes for each model are
listed below.
INPUT POWER CONNECTIONS
Before making this connection, measure and verify
the site voltage phase to phase and phase to ground.
In the case of high line to ground voltage it may be
necessary to disconnect the line to ground EMC and
MOV protection. See Figures 1, 2 and 3 for details.
Ensure the ground wire is connected back to the
service entrance ground and that the service entrance
ground is bonded to a proper ground rod.
Ensure disconnect switches
are locked in the OFF
position before making this
connection. For models with an N1 (NEMA
1) suffix, connect conduit to the conduit
box supplied with the controller. For all
other models (NEMA 3R), drill a hole that
is properly sized for the conduit used in
the bottom of the enclosure.
NOTE: Drilling in to the side or top of the
enclosure will violate the NEMA 3R rating.
Use metal conduit and metal conduit
connectors. Size the conduits according to
the NEC, CEC or local codes. Use the wire
sizing chart in Appendix B to determine
the size of the input power wires.
Connect the conduit and insert the wires
into the controller or enclosure. Connect
wires to the “INPUT” terminal block. For
N1 models, this terminal block is on the
controller and the terminal locations are
as shown in Figures 1, 2 and 3. For all
other models, this connection is made
to the input side of the fused disconnect
that is included in the enclosure. The
connections from the output side of the
disconnect to the controller are made at
the factory. Connect the ground wire to
the terminal labeled GND. For three phase
input, connect the input phase wires to
U1, V1 and W1. For single phase input,
connect the input wires to U1 and W1.
Input
Voltage
Model Number
Input Current
(Arms)
Mains Fuse Size
(UL Class T)
230V
SPD20400 114 150
SPD20400F 143 200
SPD20400N1 114 150
SPD20500 143 200
SPD20500F 178 250
SPD20500N1 143 200
SPD20600 178 250
SPD20600F 221 300
SPD20600N1 178 250
460V
SPD40400 59 80
SPD40400F 72 90
SPD40400N1 59 80
SPD40500 72 90
SPD40500F 96 125
SPD40500N1 72 90
SPD40600 96 125
SPD40600F 96 125
SPD40600N1 96 125
SPD40750 124 175
SPD40750F 124 175
SPD40750N1 124 175
SPD41000 157 200
SPD41000F 157 200
SPD41000N1 157 200
575V
SPD50400N1 52 60
SPD50500N1 77 100
SPD50600N1 77 100
SPD50750N1 99 150
SPD51000N1 144 200
Hazardous
voltage
DANGER