SEL-2664S Stator Ground Protection Relay 100% Stator Ground Fault Protection 100% of the Time Major Features and Benefits The SEL-2664S Stator Ground Protection Relay provides an exceptional combination of protection, metering, monitoring, control, and communications in a compact industrial package. ➤ Standard Protection and Control Features. Protect your generator against stator ground, neutral overvoltage, and grounding resistor faults. When used with an SEL-2664 Field Ground Module, the SEL-2664S Relay protects against rotor field insulation faults to ground. The stator ground protection works for 100 percent of the stator winding and for all operating conditions, including when the generator is starting, ramping, or offline using a novel multifrequency injection method in conjunction with the neutral overvoltage elements. Operator Controls. Take advantage of multiple methods for accessing and using the operator interface of the relay. The front and side panels have eight LEDs that indicate the ENABLED, TRIP, WARNING, 64S, 64F, 59N, 64F MODULE FAIL, 64S INJECT ON status of the relay. The front panel also provides a TARGET RESET pushbutton for resetting the relay and the targets. Relay and Logic Settings Software. Use ACSELERATOR QuickSet® SEL-5030 Software to reduce your engineering costs for relay settings and logic programming and simplify development of SELOGIC® control equations. Metering and Monitoring. Use built-in metering functions to eliminate separately mounted metering devices. Analyze SER reports and oscillographic event reports for rapid commissioning, testing, and post-fault diagnostics. Additional monitoring functions include the Profile Report. Control Inputs and Outputs. Take advantage of two internally wetted control inputs and four contact outputs (one Form C and three Form A) for control and status indication. Schweitzer Engineering Laboratories, Inc.

Port 1 with dual fiber-optic Ethernet ports Port 2 with an ST® fiber-optic EIA-232 serial port Front port and Port 3 with an EIA-232 configurable serial port ➤ Communications Protocols. Modbus® RTU, Modbus TCP/IP DNP3 serial and LAN/WAN IEC 61850 Simple Network Time Protocol (SNTP) File Transfer Protocol (FTP) Telnet (SEL ASCII) SEL protocols, including MIRRORED BITS® communications ➤ Conformally Coated. ➣ ➣ ➣ ➣ ➣ ➣ ➣ 59N1 Neutral Fundamental Overvoltage Stator Ground Event Reports Operator Interface Sequential Events Recorder Profile Report Monitoring * Neutral Grounding Resistor ‡ Neutral Grounding...

Protection and Control Features ➤ 100% Stator Ground Protection. The SEL-2664S uses multisine signal injection to provide 100 percent stator ground protection 100 percent of the time. The relay works with the generator in or outof-service, including the generator ramp-up with no blind period. Two levels of 64S (stator ground) elements provide warning and trip along with delay and torque control settings. The 64S elements together with the 59N elements detect faults between ground and any location, including the neutral point on the stator winding of synchronous generators. Redundant protection...

Metered Quantities (Sheet 2 of 2) Magnitude of neutral currents at the injected frequencies in secondary amperes Stator Insulation (kOhms) Resistance of the stator insulation to ground at the injected frequencies in kilohms Secondary and Primary are in reference to the Neutral Grounding Transformer (NGT), not CTN. Neutral rms current (A sec) is shown if CTN_LOC := SEC; otherwise, it is hidden. Profile Report Monitoring Profile report monitoring provides a periodic snapshot (selectable rate of every 1, 5, 15, 30, or 60 minutes) of as many as 17 selectable analog quantities from the complete list...

Apply an SEL communications processor as the hub of a star network, with point-to-point connection between the hub and the SEL-2664S (see Figure 3). The communications processor supports external communications links including the public switched telephone network for engineering access to dial-out alerts and private line connections of the SCADA system. Dial-Up ASCII Link SCADA Link ASCII Reports Plus Interleaved Binary Data IED Example Communications System SEL manufactures a variety of standard cables for connecting this and other relays to a variety of external devices. Consult your SEL representative...

Ethernet Network Architectures Cat 5 shielded twisted pair (STP) cables for copper Ethernet ports Fiber-optic Ethernet cables with fiber-optic Ethernet ports Fiber only Figure 6 Simple Ethernet Network Configuration With Ring Structure (Switched Mode) Schweitzer Engineering Laboratories, Inc.

Operator Controls There are multiple methods for accessing the operator interface of the relay. As shown in Figure 18, the front and side panels have eight LEDs that indicate the ENABLED, TRIP, WARNING, 64S, 64F, 59N, 64F MODULE FAIL, 64S INJECT ON status of the relay. The front panel also provides a TARGET RESET pushbutton for resetting the relay and the targets. Relay and Logic Settings Software ACSELERATOR QuickSet simplifies settings and provides analysis support for the SEL-2664S. Create and manage relay settings with ACSELERATOR QuickSet in the following ways: ➤ Develop settings offline...

Figure 9 shows the ac connections for the SEL-2664S with the neutral ground resistor (NGR) and CTN on the primary side and a neutral voltage transformer. Relay 1 SEL-2664S I_SRC Neutral Voltage Transformer Relay 2 2-C Twisted Pair. Do not ground the CTN leads. C01 2-C Twisted Pair. Do not ground the CTN leads. Figure 9 AC Connections With Neutral CT on the Primary Side and Neutral Voltage Transformer Figure 10 shows the ac connections with NGR in the secondary side of a wye-broken delta grounding transformer on the generator terminals. NGT SEL-2664S I_SRC NGR Figure 11 AC Connections for Protection...

Guideform Specification One-hundred percent stator ground protection shall be provided by a microprocessor-based relay equipped with the following protection, monitoring, control, automation, and reporting functions. Self-checking functions shall be included. Specific requirements shall be as follows. Protection and Control ➤ Fundamental and rms neutral overvoltage (59N1, 59NRMS) ➤ Neutral ground resistance (NGR) monitor function to detect open or short conditions. ➤ Stator ground protection (64S) using four frequency injection source ➤ Rotor field ground protection (64F) when used with an SEL-2664...