Xylem Wastewater (Technical Manual) - Manual (Page 11)

PAGE 11
Wastewater
Goulds Water Technology, Bell & Gossett,
Red Jacket Water Products, CentriPro
TRANSFORMER SIZES
A full three phase supply is recommended for all three phase
motors, consisting of three individual transformers or one three
phase transformer. “Open” delta or wye connections using only
two transformers can be used, but are more likely to cause prob-
lems from current unbalance.
Transformer ratings should be no smaller than listed in the table
for supply power to the motor alone.
TRANSFORMER CAPACITY REQUIRED
FOR SUBMERSIBLE MOTORS
Smallest KVA Rating –
Submersible Total Effective Each Transformer
3Ø Motor KVA Open WYE WYE or
HP Rating Required DELTA 2 DELTA 3
Transformers Transformers
1 1 ⁄
2
3 2 1
2 4 2 1 1 ⁄
2
3 5 3 2
5 7 1 ⁄
2
5 3
7 1 ⁄
2
10 7 1 ⁄
2
5
10 15 10 5
15 20 15 7 1 ⁄
2
20 25 15 10
25 30 20 10
30 40 25 15
40 50 30 20
50 60 35 20
60 75 40 25
75 90 50 30
100 120 65 40
AGENCY LISTINGS AND POWER CORD PLUG REMOVAL
Our single-phase sump, effluent and sewage pumps with 115,
208 and 230 volt motors up to and including 1 HP are now
built with NEMA three-prong grounding plug power cords. This
allows qualified electricians or professional pump installers to
easily connect the pumps; according to U.S. National (NEC),
Canadian (CSA), state, provincial and local electrical codes, to a
properly rated piggyback float switch for automatic operation.
NOTICE: This statement is written for the intent purpose of
verifying to electrical inspectors that according to both UL and
CSA standards it is allowable to remove the plug ends for direct
wiring to a disconnect switch, control panel or hard wired float
switch. Removing the plug end does not violate our UL Listing
or CSA/CUS certification in any way. Always follow the afore-
mentioned codes when making connections to the bare leads
once the plug is removed. Plug removal information and wiring
diagrams may be found in the Installation Manual supplied with
the pump and in this booklet. Please use this statement in the
event an inspector needs written assurance of this policy.
Electrical Data