PSC 119.04(10)(a)(a) The applicant shall give the public utility the opportunity to witness or verify the system testing, as required in
s. PSC 119.30 or
119.31. Upon receiving notification that an installation is complete, the public utility has 10 working days, for a Category 1 or 2 DG project, or 20 working days, for a Category 3 or 4 DG project, to complete the following:
PSC 119.04(10)(a)2.
2. Perform an anti-islanding test or verify the protective equipment settings at its expense.
PSC 119.04(10)(a)3.
3. Waive its right, in writing, to witness or verify the commissioning tests.
PSC 119.04(10)(b)
(b) The applicant shall provide the public utility with the results of any required tests.
PSC 119.04(11)
(11) The public utility may review the results of the on-site tests and shall notify the applicant within 5 working days, for a Category 1 DG project, or within 10 working days, for a Category 2 to 4 DG project, of its approval or disapproval of the interconnection. If approved, the public utility shall provide a written statement of final acceptance and cost reconciliation. Any applicant for a DG system that passes the commissioning test may sign a standard interconnection agreement and interconnect. If the public utility does not approve the interconnection, the applicant may take corrective action and request the public utility to reexamine its interconnection request.
PSC 119.04(12)
(12) A standard interconnection agreement shall be signed by the applicant and public utility before parallel operation commences.
PSC 119.04 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.05
PSC 119.05 Insurance and indemnification. PSC 119.05(1)
(1) An applicant seeking to interconnect a DG facility to the distribution system of a public utility shall maintain liability insurance equal to or greater than the amounts stipulated in Table 119.05-1, per occurrence, or prove financial responsibility by another means mutually agreeable to the applicant and the public utility. For a DG facility in Category 2 to 4, the applicant shall name the public utility as an additional insured party in the liability insurance policy.
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See PDF for table 
PSC 119.05(2)
(2) Each party to the standard interconnection agreement shall indemnify, hold harmless and defend the other party, its officers, dire
ctors, employees and agents from and against any and all claims, suits, liabilities, damages, costs and expenses resulting from the installation, operation, modification, maintenance or removal of the DG facility. The liability of each party shall be limited to direct actual damages, and all other damages at law or in equity shall be waived.
PSC 119.05 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.06
PSC 119.06 Modifications to the DG facility. The applicant shall notify the public utility of plans for any material modification to the DG facility by providing at least
20 working days of advance notice for a Category 1 DG facility, 40 working days for Category 2 DG facility, and 60 working days for a Category 3 or 4 DG facility. The applicant shall provide this notification by submitting a revised standard application form and such supporting materials as may be reasonably requested by the public utility. The applicant may not commence any material modification to the DG facility until the public utility has approved the revised application, including any necessary engineering review or distribution system study. The public utility shall indicate its written approval or rejection of a revised application within the number of working days shown in the table below. Upon completion of the application process, a new standard interconnection agreement shall be signed by both parties prior to parallel operation. If the public utility fails to respond in the time specified in Table 119.06-1, the completed application is deemed approved.
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See PDF for table PSC 119.06 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.07
PSC 119.07 Easements and rights-of-way. If a public utility line extension is required to accommodate a DG interconnection, the applicant shall provide, or obtain from others, suitable easements or rights-of-way. The applicant is responsible for the cost of providing or obtaining these easements or rights of way.
PSC 119.07 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.08
PSC 119.08 Fees and distribution system costs. PSC 119.08(1)(1) Upon receiving a standard application form, the public utility shall specify the amount of any engineering review or distribution system study fees. Application fees shall be credited toward the cost of any engineering review or distribution system study. The applicant shall pay the fees specified in Table 119.08, unless the public utility chooses to waive the fees in whole or in part.
-
See PDF for table PSC 119.08(2)
(2) The public utility may recover from the applicant an amount up to the actual cost, for labor and parts, of any distribution system upgrades required. No public utility may charge a commissioning test fee for initial start-up of the DG facility. The utility may charge for retesting an installation that does not conform to the requirements set forth in this chapter.
PSC 119.08 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.09
PSC 119.09 Disconnection. A public utility may refuse to connect or may disconnect a DG facility from the distribution system only under any of the following conditions:
PSC 119.09(1)
(1) Lack of approved standard application form or standard interconnection agreement.
PSC 119.09(2)
(2) Termination of interconnection by mutual agreement.
PSC 119.09(3)
(3) Non-compliance with the technical or contractual requirements.
PSC 119.09(5)
(5) Routine maintenance, repairs, and modifications, but only for a reasonable length of time necessary to perform the required work and upon reasonable notice.
PSC 119.09 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.10(1)
(1) The applicant shall include a one-line schematic diagram with the completed standard application form. ANSI symbols shall be used in the one-line schematic diagram to show the following:
PSC 119.10(1)(b)
(b) Point where the DG facility is electrically connected to the customer's electrical system.
PSC 119.10(1)(e)
(e) Method of grounding, including generator and transformer ground connections.
PSC 119.10(2)
(2) The applicant shall include with the schematic diagram technical specifications of the point where the DG facility is electrically connected to the customer's electrical system, including all anti-islanding and power quality protective systems. The specifications regarding the anti-islanding protective systems shall describe all automatic features provided to disconnect the DG facility from the distribution system in case of loss of grid power, including the functions for over/under voltage, over/under frequency, overcurrent, and loss of synchronism. The applicant shall also provide technical specifications for the generator, lockable interconnection disconnect switch, and grounding and shall attach the technical specification sheets for any certified equipment. The applicant shall include with the schematic diagram a statement by the manufacturer that its equipment meets or exceeds the type tested requirements for certification.
PSC 119.10 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.11
PSC 119.11 Control schematics. For equipment not certified under
s. PSC 119.26, the applicant shall include with the application a complete set of control schematics showing all protective functions and controls for generator protection and distribution system protection.
PSC 119.11 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.12
PSC 119.12 Site plan. For all categories, the applicant shall include with the application a site plan that shows the location of the interconnection disconnect switch, adjoining street name, and the street address of the DG facility. For Category 2, 3, or 4 DG facilities, the site plan shall show the location of major equipment, electric service entrance, electric meter, interconnection disconnect switch, and interface equipment.
PSC 119.12 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.20
PSC 119.20 General design requirements. PSC 119.20(1)
(1) The applicant shall install protection devices to ensure that the current supplied by the DG facility is interrupted if a fault or other potentially dangerous event occurs on the distribution system. If such an event occurs and the public utility's distribution system is de-energized, any DG facility that is connected to this distribution system shall automatically disconnect. All DG facilities shall utilize protection devices that prevent electrically closing a DG facility that is out of synchronization with the distribution system.
PSC 119.20(2)
(2) All installations shall include equipment circuit breakers, on the DG facility side of the point where the DG facility is electrically connected to the customer's electrical system, that are capable of interrupting the maximum available fault current. Equipment circuit breakers shall meet all applicable UL, ANSI, and IEEE standards.
PSC 119.20(3)
(3) The public utility may require that the applicant furnish and install an interconnection disconnect switch that opens, with a visual break, all ungrounded poles of the interconnection circuit. The interconnection disconnect switch shall be rated for the voltage and fault current requirements of the DG facility, and shall meet all applicable UL, ANSI, and IEEE standards. The switch enclosure shall be properly grounded. The interconnection disconnect switch shall be accessible at all times, located for ease of access to public utility personnel, and shall be capable of being locked in the open position. The applicant shall follow the public utility's recommended switching, clearance, tagging, and locking procedures.
PSC 119.20 Note
Note: Provisions of the Wisconsin Electrical Safety Code, Volume 2, ch.
SPS 316 also apply to these installations.
PSC 119.20(4)
(4) The applicant shall label the interconnection disconnect switch “Interconnection Disconnect Switch" by means of a permanently attached sign with clearly visible and permanent letters. The applicant shall provide and post its procedure for disconnecting the DG facility next to the switch.
PSC 119.20(5)
(5) The applicant shall install an equipment grounding conductor, in addition to the ungrounded conductors, between the DG facility and the distribution system. The grounding conductors shall be available, permanent, and electrically continuous, shall be capable of safely carrying the maximum fault likely to be imposed on them by the systems to which they are connected, and shall have sufficiently low impedance to facilitate the operation of overcurrent protection devices under fault conditions. All DG transformations shall be multi-grounded. The DG facility may not be designed or implemented such that the earth becomes the sole fault current path.
PSC 119.20 Note
Note: Grounding practices are also regulated by the Wisconsin Electrical Safety Code Volumes 1 and 2, as found in chs.
SPS 316 and
PSC 114.
PSC 119.20(6)(a)(a) Certified paralleling equipment shall conform to UL 1741 (January 17, 2001 Revision) or an equivalent standard as determined by the commission.
PSC 119.20(6)(b)
(b) Non-certified paralleling equipment shall conform to the requirements of IEEE 1547.
PSC 119.20 Note
Note: The UL standards are available at
http://ulstandards.ul.com, and IEEE standards are available at
http://ieee.org. They may also be viewed at the PSCW Library, 610 N. Whitney Way, Madison, WI.
PSC 119.20(7)(a)(a) All Category 1 and 2 DG facilities shall be operated at a power factor greater than 0.9.
PSC 119.20(7)(b)
(b) All Category 3 and 4 DG facilities shall be operated at unity power factor or as mutually agreed between the public utility and applicant.
PSC 119.20(8)
(8) The DG facility shall not create system voltage or current disturbances that exceed the standards listed in subch.
VII of ch. PSC 113.
PSC 119.20(9)
(9) The applicant shall protect and synchronize its DG facility with the distribution system.
PSC 119.20(10)
(10) Each DG facility shall include an automatic interrupting device that is listed with a nationally recognized testing laboratory and is rated to interrupt available fault current. The interrupting device shall be tripped by any of the required protective functions.
PSC 119.20(11)
(11) An applicant for interconnection of a Category 3 or Category 4 facility shall provide test switches as specified by the public utility, to allow for testing the operation of the protective functions without unwiring or disassembling the equipment.
PSC 119.20(12)
(12) The public utility may require a DG facility to be isolated from other customers by installation of a separate power transformer. When a separate transformer is required, the utility may include its actual cost in the distribution system upgrade costs. The applicant is responsible for supplying and paying for any custom transformer. This requirement does not apply to an induction-type generator with a capacity of 5 kW or less, or to other generating units of 10 kW or less that utilize a line-commutated inverter.
PSC 119.20(13)
(13) The owner of a DG facility designed to operate in parallel with a spot or secondary network service shall provide relaying or control equipment that is rated and listed for the application and is acceptable to the public utility.
PSC 119.20(14)
(14) For a Category 3 or Category 4 DG facility, the public utility may require that the facility owner provide telemetry equipment whose monitoring functions include transfer-trip functionality, voltage, current, real power (watts), reactive power (vars), and breaker status.
PSC 119.20 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.25
PSC 119.25 Minimum protection requirements. PSC 119.25(1)(1) Each DG facility shall include protection and anti-islanding equipment to prevent the facility from adversely affecting the reliability or capability of the distribution system. The applicant shall contact the public utility to determine any specific protection requirements.
PSC 119.25(2)
(2) The protective system functions, which may be met with microprocessor-based multifunction protection systems or discrete relays, are required. Protective relay activation shall not only alarm but shall also trip the generator breaker/contactor.
PSC 119.25(3)
(3) In addition to anti-islanding protection, a DG facility shall meet the following minimum protection requirements:
PSC 119.25(3)(b)6.
6. Other equipment, such as other protective devices, supervisory control and alarms, telemetry and associated communications channel, that the public utility determines to be necessary. The public utility shall advise the applicant of any communications requirements after a preliminary review of the proposed installation.
PSC 119.25(4)
(4) A DG facility certified pursuant to
s. PSC 119.26 shall be deemed to meet the requirements of this section.
PSC 119.25 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.26
PSC 119.26 Certified paralleling equipment. DG paralleling equipment that a nationally recognized testing laboratory certifies as meeting the applicable type testing requirements of UL 1741 (January 17, 2001 revision) is acceptable for interconnection, without additional protection systems, to the distribution system. The applicant may use certified paralleling equipment for interconnection to a distribution system without further review or testing of the equipment design by the public utility, but the use of this paralleling equipment does not automatically qualify the applicant to be interconnected to the distribution system at any point in the distribution system. The public utility may still require an engineering review to determine the compatibility of the distributed generation system with the distribution system capabilities at the selected point of common coupling.
PSC 119.26 History
History: CR 03-003: cr.
Register January 2004 No. 577, eff. 2-1-04.
PSC 119.27
PSC 119.27 Non-certified paralleling equipment.
