Installation – Alpha Technologies CESC-3X User Manual
Page 6
2. Installation
6
031-099-C0-001 Rev. A
© 2000
TM
2.2
Utility Power Connection
Table 2-1; Service Entrance Circuit Breaker Requirements
n
o
i
t
p
i
r
c
s
e
D
a
h
p
l
A
r
e
b
m
u
N
t
r
a
P
D
e
r
a
u
q
S
r
e
b
m
u
N
t
r
a
P
)
A
5
1
(
c
i
t
e
n
g
a
M
n
o
N
-
n
o
i
t
a
ll
a
t
s
n
I
V
0
4
2
0
1
-
4
2
2
-
0
7
4
5
1
2
0
Q
)
A
0
2
(
c
i
t
e
n
g
a
M
h
g
i
H
-
n
o
i
t
a
ll
a
t
s
n
I
V
0
2
1
0
1
-
7
1
0
-
0
7
4
M
H
9
2
1
0
Q
)
A
5
1
(
c
i
t
e
n
g
a
M
h
g
i
H
-
n
o
i
t
a
ll
a
t
s
n
I
V
0
2
1
0
1
-
3
1
0
-
0
7
4
M
H
5
1
1
0
Q
t
c
e
n
n
o
c
s
i
D
e
c
i
v
r
e
S
l
a
n
r
e
t
x
E
-
X
B
B
0
1
-
5
8
0
-
0
2
0
B
R
0
7
L
4
-
2
0
Q
CAUTION:
The “Utility Power Connection” procedure must ONLY be
performed by qualified service personnel and in compliance
with local electrical codes and common safety practices.
Connection to utility power must be approved by the local
utility before installing the power supply.
NOTE:
UL and NEC require that a service disconnect switch (UL listed) be
provided by the installer and be connected between the power
source and the ALPHA power supply. Connection to the power
supply must include an appropriate service entrance weather head.
Wiring the Utility Service
Utility power enters the enclosure through the side or bottom of the UPE. The
enclosure accepts a standard electrical fitting. The UPE Series can be equipped with an
optional circuit breaker assembly located in the enclosure’s module compartment.
NOTE:
A “high-magnetic” trip circuit breaker must be used in order to
accommodate the high-inrush currents normally associated with the
start-up of ferroresonant transformers (400 Amp, no-trip, first-half
cycle). Do not replace this circuit breaker with a conventional service
entrance circuit breaker. Alpha recommends Square D circuit breakers
ONLY, because of increased reliability in this powering application.
Alpha Technologies offers a high-magnetic Square D circuit breaker and a BBX option (a
UL Listed service entrance). Contact your local sales representative for more information.
In most cases, the following configurations (see next page) qualify for service
entrance use, however, other codes may apply. Always contact your local utility to
verify that the wiring conforms to applicable codes.