Common use of Xxxxxx Substation Clause in Contracts

Xxxxxx Substation. The Xxxxxx Substation WP-1 and WP-2 tap configurations will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV, 63 kA circuit breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.

Xxxxxx Substation. The Xxxxxx Substation WP-1 and WP-2 tap configurations will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV900 kV, 63 kA circuit breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.

Xxxxxx Substation. The Xxxxxx Substation WP-1 and WP-2 tap configurations will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV900 kV, 63 kA circuit breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ Substation The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.

Xxxxxx Substation. The Xxxxxx Substation WP-1 and WP-2 tap configurations will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV, 63 kA circuit breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. Issued by: Xxxxxx X. Xxxxxxxx, Dir. Reg. Affairs Effective: April 2, 2008 Issued on: April 23, 2008 New York Independent System Operator, Inc. FERC Electric Tariff, Original Volume Xx. 0 Xxxxxxxx Xxxxx Xx. 00 Service Agreement No. 1311 The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. Issued by: Xxxxxx X. Xxxxxxxx, Dir. Reg. Affairs Effective: April 2, 2008 Issued on: April 23, 2008 New York Independent System Operator, Inc. FERC Electric Tariff, Original Volume Xx. 0 Xxxxxxxx Xxxxx Xx. 00 Service Agreement No. 1311 WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ Substation The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels Issued by: Xxxxxx X. Xxxxxxxx, Dir. Reg. Affairs Effective: April 2, 2008 Issued on: April 23, 2008 New York Independent System Operator, Inc. FERC Electric Tariff, Original Volume Xx. 0 Xxxxxxxx Xxxxx Xx. 00 Service Agreement No. 1311 DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.

Xxxxxx Substation. The Xxxxxx Substation WP-1 and WP-2 tap configurations will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV, 63 kA circuit breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ Substation The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.

Xxxxxx Substation. The Xxxxxx Substation WP-1 MWP-1 and WP-2 MWP-2 tap configurations configuration will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Connecting Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV, 63 kA circuit breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.

Xxxxxx Substation. The Xxxxxx Substation WP-1 MWP-1 and WP-2 MWP-2 tap configurations configuration will be each be converted to breaker and a half configuration. The conversion will require the addition of three circuit breakers, modifications to the existing structures, station connections, line terminations, and protection system. The existing 230kV 2100 bay will be modified by the addition of a third breaker to create separate terminals for the MW-2 and WRY-2 segments of the existing MWP-2 transmission line. PT’s and CVT’s will be added in conjunction with the line relaying modifications. A new 2300 bay will be added north of the existing 2200 bay in an area previously designated by Connecting Transmission Owner for expansion. The new 2300 bay will include two new 230kV circuit breakers, SF6 type, 2000A continuous circuit, rated 900kV, 63 kA circuit A-12 SERVICE AGREEMENT NO. 1774 breakers, associated disconnect switches, and line terminal equipment to accommodate the relocated WP-1 transmission line. The WP-1 transmission line will be re-designated WPN-1. New PT’s and CCVT’s will be added in conjunction with the new line and relaying systems will be installed for the WPN-1 line. The MW-1 line will terminate in the 2200 bay. The existing MWP-1 line primary protection is a blocking carrier scheme using electromechanical relays with ON-OFF carrier equipment. The existing MWP-1 line secondary protection utilizes electromechanical relays to provide backup distance protection. New CCVT’s will be added in the 2200 bay. The existing Direct Transfer Trip is accomplished via audio tone equipment over single side band power line carrier channels. The existing primary and secondary MWP-1 line protection will remain and be re-designated as MW-1 line protection. The new equipment will include: - 230kV Circuit Breakers - 230kV Disconnect Switches - Potential Transformers - Capacitive Voltage Transformers - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels - Wave Traps and Line Tuners WRY-2 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - Reconfigure existing FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave. - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. WPN-1 Line The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP)over power line carrier - New numerical multifunction relay for phase and ground fault protection - New FSK PLC equipment for DCU - New FSK PLC equipment for DTTP - New hybrids - Additional auxiliary devices, test switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc. New 230kV Circuit Breakers New primary and secondary breaker failure relays and their associated lockout relays and test switches are added for each new breaker. Various switches associated for breaker control are added for each new breaker. Plattsburgh Substation‌ The Plattsburgh Substation WP-1 and WP-2 lines will be re-designated DP-1 and RYP-2 respectively. The existing primary and secondary line relaying systems will be replaced with numerical relay systems as shown below. The new equipment will include: - Phase C Line Tuners - Phase C Wave Trap - Primary Protection Panels - Secondary Protection Panels - Communication Racks - Termination Panels DP-1 and RYP-2 Lines The primary line relaying will include: - Pilot Scheme; directional comparison unblocking (DCU) and primary direct transfer trip (DTTP) over power line carrier - New numerical multifunction relay for phase and ground fault protection - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, tests switches, lockout relays, etc. The secondary line relaying will include: - Pilot Scheme; current differential with secondary DTT (DTTS) over digital microwave - New current differential relay - New Digital multiplexer and/or fiber optic interface unit - Additional auxiliary devices, test switches, lockout relays, etc.: