Common use of Protective Relaying Clause in Contracts

Protective Relaying. ▪ Primary Line Protection: Directional Comparison Unblocking Pilot Relaying over Power Line Carrier shall be provided via the existing numerical distance relay. This relaying system shall be set selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. Identical primary line protection will be installed for the second line connection. ▪ Secondary Line Protection: Line Current Differential Relaying over Digital Microwave channels will be provided via a microprocessor based current differential relay. This relay will be set to provide backup distance protection if the communications channels are lost and be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). Identical secondary line protection will installed for the second line connection. ▪ Breaker Failure: Two independent primary and secondary breaker failure relaying systems provide redundant breaker failure protection. After a circuit breaker trip is initiated, the breaker failure relay will begin a countdown timer. If the circuit breaker fails to open within a specified period, then the breaker failure relay and its associated lockout relay will trip and block closure of an adjacent circuit breaker(s) and send direct transfer trip to the remote terminal station to isolate the stuck breaker. The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Transfer Trip: The breaker failure conditions at Transmission Owner terminals will be remotely tripped at the Xxxx Substation upon receiving direct transfer trip (DTT) signals from Xxxxxx and/or Plattsburgh substations. The breaker failure conditions at the Xxxx Substation will be remotely tripped at the Transmission Owner’s Terminal upon receiving DTT signals from the Xxxx Substation. The Phase II protection will be coordinated with the Xxxxxx Substation and the Plattsburgh Substation remote line relays.

Protective Relaying. ▪ Primary Line Protection: Directional Comparison Unblocking Pilot Relaying over Power Line Carrier Distance relaying protection shall be provided via the existing a numerical distance relay. This relaying system shall be set selective within the prescribed zones of protection based on the system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Secondary Line Protection: Distance relaying protection will be provided via a high speed microprocessor based distance relay. This relay shall be set to be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. Identical primary line protection will be installed for the second line connection. ▪ Secondary Line Protection: Line Current Differential Relaying over Digital Microwave channels will be provided via a microprocessor based current differential relay. This relay will be set to provide backup distance protection if the communications channels are lost and be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). Identical secondary line protection will installed for the second line connection. ▪ Breaker Failure: Two independent primary and secondary breaker failure relaying systems provide redundant breaker failure protection. After a circuit breaker trip is initiated, initiated the breaker failure relay will begin a countdown timer. If the circuit breaker fails to open within a specified period, then the breaker failure relay and will trip its associated lockout relay will to trip and block closure of an the adjacent and series line circuit breaker(s) and breakers. The breaker failure relaying at the Xxxx Substation does not send direct transfer trip to the remote terminal station substation. The series line breaker is provided to isolate stuck breakers from the stuck breaker230kV system. The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Transfer Trip: During Phase I, the Xxxx Substation is connected via a tap to the MWP-2 line. The line will be tripped by MWP-2 line relay and breaker failure operations at Transmission Owner terminals. Breaker failure conditions at Transmission Owner terminals will be programmed to remotely tripped at trip the Xxxx Substation incoming breaker upon receiving direct transfer trip (DTT) signals from Xxxxxx and/or Plattsburgh substationsSubstation. Two independent communication channels will be provided for the DTT. ▪ Synch Check Relay: A synch check relay for each breaker will be used to compare voltages across circuit breakers to prevent the substation breakers from closing out of phase. The breaker failure conditions at the Xxxx Substation will relay shall be remotely tripped at the of utility grade and meet Transmission Owner’s Terminal upon receiving DTT signals standards. ▪ Remote Control: Transmission Owner will have the ability to remotely open any and all 230 kV circuit breakers and motorized line disconnect switch from the Xxxx Substation. The Phase II protection will be coordinated with the Xxxxxx Substation and the Plattsburgh Substation remote line relaysTransmission Owner’s control center via SCADA.

Protective Relaying. ▪  Primary Line Protection: Directional Comparison Unblocking Pilot Relaying over Power Line Carrier Distance relaying protection shall be provided via the existing a numerical distance relay. This relaying system shall be set selective within the prescribed zones of protection based on the system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards.  Secondary Line Protection: Distance relaying protection will be provided via a high speed microprocessor based distance relay. This relay shall be set to be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. Identical primary line protection will be installed for the second line connection. ▪ Secondary Line Protection: Line Current Differential Relaying over Digital Microwave channels will be provided via a microprocessor based current differential relay. This relay will be set to provide backup distance protection if the communications channels are lost and be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). Identical secondary line protection will installed for the second line connection. ▪  Breaker Failure: Two independent primary and secondary breaker failure relaying systems provide redundant breaker failure protection. After a circuit breaker trip is initiated, initiated the breaker failure relay will begin a countdown timer. If the circuit breaker fails to open within a specified period, then the breaker failure relay and will trip its associated lockout relay will to trip and block closure of an the adjacent and series line circuit breaker(s) and breakers. The breaker failure relaying at the Xxxx Substation does not send direct transfer trip to the remote terminal station substation. The series line breaker is provided to isolate stuck breakers from the stuck breaker230kV system. The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Transfer Trip Synch Check Relay: The A synch check relay for each breaker failure conditions at Transmission Owner terminals will be remotely tripped at used to compare voltages across circuit breakers to prevent the Xxxx Substation upon receiving direct transfer trip (DTT) signals substation breakers from Xxxxxx and/or Plattsburgh substationsclosing out of phase. The breaker failure conditions at the Xxxx Substation will relay shall be remotely tripped at the of utility grade and meet Transmission Owner’s Terminal upon receiving DTT signals standards.  Remote Control: Transmission Owner will have the ability to remotely open any and all 230 kV circuit breakers and motorized line disconnect switch from the Xxxx Substation. The Phase II protection will be coordinated with the Xxxxxx Substation and the Plattsburgh Substation remote line relaysTransmission Owner’s control center via SCADA.

Protective Relaying. ▪ Primary Line Protection: Directional Comparison Unblocking Pilot Relaying over Power Line Carrier Distance relaying protection shall be provided via the existing a numerical distance relay. This relaying system shall be set selective within the prescribed zones of protection based on the system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Secondary Line Protection: Distance relaying protection will be provided via a high speed microprocessor based distance relay. This relay shall be set to be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. Identical primary line protection will be installed for the second line connection. ▪ Secondary Line Protection: Line Current Differential Relaying over Digital Microwave channels will be provided via a microprocessor based current differential relay. This relay will be set to provide backup distance protection if the communications channels are lost and be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). Identical secondary line protection will installed for the second line connection. ▪ Breaker Failure: Two independent primary and secondary breaker failure relaying systems provide redundant breaker failure protection. After a circuit breaker trip is initiated, initiated the breaker failure relay will begin a countdown timer. If the circuit breaker fails to open within a specified period, then the breaker failure relay and will trip its associated lockout relay will to trip and block closure of an the adjacent and series line circuit breaker(s) and breakers. The breaker failure relaying at the Xxxx Substation does not send direct transfer trip to the remote terminal station substation. The series line breaker is provided to isolate stuck breakers from the stuck breaker230kV system. The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Transfer Trip: During Phase I, the Xxxx Substation is connected via a tap to the MWP-2 line. The line will be tripped by MWP-2 line relay and breaker failure operations at Transmission Owner terminals. Breaker failure conditions at Transmission Owner terminals will be programmed to remotely tripped at trip the Xxxx Substation incoming breaker upon receiving direct transfer trip (DTT) signals from Xxxxxx and/or Plattsburgh substationsSubstation. The breaker failure conditions at the Xxxx Substation Two independent communication channels will be remotely tripped at provided for the Transmission Owner’s Terminal upon receiving DTT signals from the Xxxx Substation. The Phase II protection will be coordinated with the Xxxxxx Substation and the Plattsburgh Substation remote line relaysDTT.

Protective Relaying. ▪ Primary Line Protection: Directional Comparison Unblocking Pilot Relaying over Power Line Carrier Distance relaying protection shall be provided via the existing a numerical distance relay. This relaying system shall be set selective within the prescribed zones of protection based on the system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. ▪ Secondary Line Protection: Distance relaying protection will be provided via a high speed microprocessor based distance relay. This relay shall be set to be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). The relay shall be of utility grade and meet Transmission Owner’s standards. Identical primary line protection will be installed for the second line connection. ▪ Secondary Line Protection: Line Current Differential Relaying over Digital Microwave channels will be provided via a microprocessor based current differential relay. This relay will be set to provide backup distance protection if the communications channels are lost and be selective within the prescribed zones of protection based on system protection analysis. The relay will directly trip and block the closure of the breaker(s). Identical secondary line protection will installed for the second line connection. ▪ Breaker Failure: Two independent primary and secondary breaker failure relaying systems provide redundant breaker failure protection. After a circuit breaker trip is initiated, initiated the breaker failure relay will begin a countdown timer. If the circuit breaker fails to open within a specified period, then the breaker failure relay and will trip its associated lockout relay will to trip and block closure of an the adjacent and series line circuit breaker(s) and breakers. The breaker failure relaying at the Xxxx Substation does not send direct transfer trip to the remote terminal station substation. The series line breaker is provided to isolate stuck breakers from the stuck breaker230kV system. The relay shall be of utility grade and meet Transmission Owner’s standards. 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 No. 1 Original Sheet No. 80 Service Agreement No. 1311 ▪ Transfer Trip: During Phase I, the Xxxx Substation is connected via a tap to the MWP-2 line. The line will be tripped by MWP-2 line relay and breaker failure operations at Transmission Owner terminals. Breaker failure conditions at Transmission Owner terminals will be programmed to remotely tripped at trip the Xxxx Substation incoming breaker upon receiving direct transfer trip (DTT) signals from Xxxxxx and/or Plattsburgh substationsSubstation. The breaker failure conditions at the Xxxx Substation Two independent communication channels will be remotely tripped at provided for the Transmission Owner’s Terminal upon receiving DTT signals from the Xxxx Substation. The Phase II protection will be coordinated with the Xxxxxx Substation and the Plattsburgh Substation remote line relaysDTT.