7/30/01
summer 2001
53
nRequirements:
n
n1.
The generating facility shall be
metered with a Montana Power Company utility installed meter.
The generating facility shall be
metered with a Montana Power Company utility installed meter.n
n2.The generating facility shall be
interconnected to the Montana Power Company utility system through a static inverter that complies
with the following requirements:
The generating facility shall be
interconnected to the Montana Power Company utility system through a static inverter that complies
with the following requirements:n
nA.Institute of
Electrical and Electronics Engineers (IEEE) standard 929, “Recommended Practice for Utility Interface
of Photovoltaic (PV) Systems.”
A.Institute of
Electrical and Electronics Engineers (IEEE) standard 929, “Recommended Practice for Utility Interface
of Photovoltaic (PV) Systems.”n
nB.Underwriters
Laboratories (UL) Subject 1741, “Standard for Static Inverters and Charge Controllers for Use in
Photovoltaic Power Systems”
B.Underwriters
Laboratories (UL) Subject 1741, “Standard for Static Inverters and Charge Controllers for Use in
Photovoltaic Power Systems”n
n3.The generating facility shall be
installed in conformance with all applicable requirements of the National Electric Code and local
building or electrical codes.
The generating facility shall be
installed in conformance with all applicable requirements of the National Electric Code and local
building or electrical codes.n
n4.The owner of the generating facility
and/or the owner’s agents or representatives shall agree not to alter the factory set points for
the inverter without first notifying the utility in writing of the owner’s intent to make any such modifications.
The owner of the generating facility
and/or the owner’s agents or representatives shall agree not to alter the factory set points for
the inverter without first notifying the utility in writing of the owner’s intent to make any such modifications.n
n5. The generating
facility shall be capable of being manually isolated from the utility system by means of an external, visible load
break, electrically located between the generating facility and the utility system. If the customer installs a separate
disconnect switch for this purpose, the disconnect switch shall be located within
10 feet of the customer’s electric meter and shall be clearly marked “Generator Disconnect Switch”. This switch shall be readily
accessible to utility personnel at all times, and the
utility shall have the right to lock this switch open whenever necessary
to maintain safe electrical operating conditions. If the customer does not install a
separate disconnect switch for this purpose, the
utility shall be permitted to remove the customer’s electric meter to provide the required
manual isolation of the generating facility.
The customer understands that removal of the
electric meter isolates the customer’s electric service as well as the generating facility, and that
electric service will not be restored until the meter is replaced.
n
n6.The utility will assume that the
customer’s generating facility is serving the customer load while the utility system is disconnected as
described in Paragraph 5 above.
Before connection to the utility system is reestablished, the
generator must be taken completely off line. When the customer generator is completely off line, the
utility service may be restored.
At that point in time, the customer generator may reconnect in
parallel to the utility system.
The utility will assume that the
customer’s generating facility is serving the customer load while the utility system is disconnected as
described in Paragraph 5 above.
Before connection to the utility system is reestablished, the
generator must be taken completely off line. When the customer generator is completely off line, the
utility service may be restored.
At that point in time, the customer generator may reconnect in
parallel to the utility system.