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SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
APP710_RelayProtection_r6
1
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Use the SEL-710 Relay to protect and control all types of three-phase motors, including full-voltage, two-speed, and reduced-voltage start and high-inertia motors.
APP710_RelayProtection_r6
2
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Apply flexible I/O to meet many needs. The base unit includes three digital outputs (DO) and two digital inputs (DI). Three positions accept plug-in option cards. The picture shows three I/O cards and their terminal connectors installed. •
Simplify indication and operation with user-configurable labels for LEDs and pushbuttons
•
Rapidly move information with optional Ethernet network communications
•
Improve safety with an optional fiber-optic serial port
•
Synchronize time with the IRIG-B input to time-tag DI transitions and trigger times for oscillographic event reports
APP710_RelayProtection_r6
3
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The upper part of the SEL-710-5 front panel remains unchanged and very familiar, with a clear twoline front-panel display and easy-to-understand directional navigation. The SEL-710-5 features eight configurable pushbutton controls and 16 configurable, tricolored lightemitting diodes (LEDs) in the auxiliary control section of the front panel. With the exception of the Enabled and Trip LEDs, six of the eight tricolored LEDs on the far left side of the front panel can be configured to reflect relay operating conditions other than the factorydefault programming. The flexible I/O can be applied to meet many needs. The base unit includes three digital outputs (DO) and two digital inputs (DI) in Slot A. Slot Z includes the standard current transformer (CT) and potential transformer (PT) inputs. Slot B allows a variety of communications and time-synchronizing options. Slots C, D, and E accept plug-in option cards. Slot E allows for applications like arc-flash protection, motor differential protection, and synchronous motor protection. Slots C, D, and E also allow for resistance temperature detector (RTD) measurements and a variety of additional I/O combinations. In the back of the relay are rapid-connect plugs for easy prewiring and replacement. You can order the relay as a base unit with no additional cards in the expansion slots or with option cards already installed. You can also install new cards in the field without factory recalibration.
APP710_RelayProtection_r6
4
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The SEL-710 offers an extensive set of motor start and stop controls. Standard input/output includes Form C fail-safe and nonfail-safe TRIP outputs and two additional Form A auxiliary outputs. Two standard inputs externally wetted by 24, 48, 110, 125, 220, or 250 Vac/Vdc (select at ordering) are provided. Relay power supply, auxiliary outputs and trip outputs, and Inputs IN101 and IN102 are on the circuit board located in Position A. Motor Start Control Protection Inhibit (Starting) Start Motor Timer Notching or Jogging (66) TCU Start Inhibit Antibackspin Timer Emergency Start Two-Speed Operation Reduced Voltage Starting (19) Stall: Speed Switch (14) Motor Stop Control Fail-Safe/Nonfail-Safe Form C TRIP Outputs (OUT103) Standard I/O Form C TRIP Outputs (OUT103) AUX Outputs OUT101 and OUT102 Inputs IN101 and IN102 Control Voltages 24, 48, 110, 125, 220, 250 Vdc/Vac APP710_RelayProtection_r6
5
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The relay has two power supply options: a high-voltage power supply that has a broad operating range that can accept ac or dc inputs or a low-voltage power supply for dc power only. If the relay is powered by ac, the burden is <40 VA; if the relay is powered by dc, the burden is <20 W.
APP710_RelayProtection_r6
6
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The base unit SEL-710 is equipped with four current transformer (CT) inputs: IA, IB, IC, and IN. The input must be specified at the time of order for either 1 A nominal or 5 A nominal CT secondary inputs. The relay can also be ordered to work with ZSCTs with a 50:0.025 ratio. The relay sequence current and power measurements are sensitive to the polarity of the current applied to the relay. Make sure that the current connections observe the polarity markings. Oddnumbered terminals should be connected to the polarity side of the CT. The relay IN input can be connected in one of two ways. The preferred method is the ground CT (zero-sequence current transformer, ZSCT). This connection will normally use a lower-ratio (greater sensitivity) CT that is less susceptible to saturation. Alternately, IN may be connected residually, requiring a relatively high overcurrent element pickup setting to avoid tripping due to false residual current caused by phase CT saturation during high starting current.
APP710_RelayProtection_r6
7
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in Slot Z of the SEL-710-5 Relay, this card has current inputs for three-phase CTs, neutral current CTs, and voltage inputs for three-phase (wye or delta) PTs.
APP710_RelayProtection_r6
8
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The optional voltage input card installed in Position E adds undervoltage, overvoltage, underpower, power factor, reactive power, and voltage-based frequency measurement. The underpower element (37) measures power in kVA. The 47 phase reversal element becomes a voltage-based element. Connect three-phase secondary voltages derived from open-delta-connected PTs or wye-connected PTs. All the control functions remain the same as in the base unit. The SEL-710 also supports a single-phase voltage input (phantom voltage). 27: Undervoltage 59: Overvoltage LC: Load control (power) 47: Phase reversal (becomes a voltage-based element) VAR: VAR elements 37: Underpower elements 55: Power factor 81: Frequency elements (becomes a voltage-based element)
APP710_RelayProtection_r6
9
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
There are two different voltage cards available. •
A standalone voltage card that includes three-phase ac voltage inputs that can be used for either wye- or open-delta-connected PTs
•
A voltage card that includes three ac current for motor differential
You can use only one of these cards per relay, and it must be in Slot E.
APP710_RelayProtection_r6
10
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
A base unit, a voltage input card, an I/O expansion card, and an RTD module provide useful features. Add a communications card for interconnection into existing control and automation systems. I/O expansion •
Four outputs (OUT401, OUT402, OUT403, OUT404)
•
Three inputs (IN401, IN402, IN403)
•
Analog output (4 to 20 mA)
Base unit control •
Motor start control
•
Motor stop control
•
Standard I/O
APP710_RelayProtection_r6
11
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The base unit has two digital inputs, three digital outputs, and three card slots that you can populate with a mix of I/O cards. The first column of the table indicates the I/O types available. The abbreviations for DI, DO, AI, and AO are common in the instrumentation and control (I&C) and SCADA (supervisory control and data acquisition) industries. If there are any of the same type of points available in the base unit, they are shown in the second column. The third column shows the number of I/O points of each type provided by an available plug-in card. The last columns indicate the maximum number of cards and points provided if you select all of the base options and install cards in the maximum number of card slots allowed.
APP710_RelayProtection_r6
12
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has eight analog inputs. x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
13
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in only one of the non-base unit slots (Slot C through Slot E), this card has four analog inputs and four analog outputs (AO). x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
14
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has eight digital inputs. x = 3, 4, or 5 (e.g., IN401, IN402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
15
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has four digital inputs and four digital outputs. The four outputs are normally open contact outputs. NOTE: All digital input and digital output (including high-current, high-speed, hybrid) connections are polarity neutral. x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
16
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in one non-base unit slot (Slot C, D, or E), this card has three digital inputs, four digital outputs, and one analog output. NOTE: All digital input and digital output (including high-current, high-speed, hybrid) connections are polarity neutral. x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
17
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in Slot D only, this card has 10 three-wire RTD inputs. NOTE: All RTD Comp/Shield terminals are internally connected to the relay chassis and ground. NOTE: Analog inputs cannot provide loop power. Each analog output is self-powered and has an isolated power supply. NOTE: Analog outputs are isolated from each other and from the chassis ground.
APP710_RelayProtection_r6
18
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has eight digital outputs. x = 3, 4, or 5 (e.g., OUT401, OUT402, etc., if the card was installed in Slot D). The 8 DO card shown above is all Form-A contacts. Refer to the SEL-710-5 Model Option Table for all the variants available (8A, 8B, 4A/4B, 2A/6B, 6A/2B).
APP710_RelayProtection_r6
19
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The optional current differential card installed in Position E adds current differential (4 wires) along with the voltage inputs below. Current differential is available only with the voltage inputs. The optional voltage inputs card installed in Position E adds undervoltage, overvoltage, underpower, power factor, reactive power, and voltage-based frequency measurement. The underpower element (37) measures power in kVA. The 47 phase reversal element becomes a voltage-based element. Connect three-phase secondary voltages derived from open-delta-connected PTs or wye-connected PTs. All the control functions remain the same as in the base unit. 27: Undervoltage 59: Overvoltage LC: Load control (power) 47: Phase reversal (becomes a voltage-based element) VAR: VAR elements 37: Underpower elements 55: Power factor 81: Frequency elements (becomes a voltage-based element) Also supports a single-phase voltage input (phantom voltage)
APP710_RelayProtection_r6
20
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Differential protection is supported with the differential card, identified with the IA87, IB87, IC87 current inputs. When you order the differential function, it comes with the voltage functions mentioned earlier.
APP710_RelayProtection_r6
21
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The functional overview shown on this slide illustrates the advanced protection available in the SEL-710 family and highlights a few of the new features available only in the SEL-710-5. Outlined in blue are the overcurrent supervised arc-flash elements. When this option is selected and combined with high-speed and high-current-interrupting contacts, this AFD protection delivers high-speed performance (4 milliseconds typical) to reduce incident energy of arcing faults in the protection zone. This reduction in incident energy can greatly improve worker safety. Outlined in green are the optional elements exclusively added for synchronous motor protection, field monitoring, and synchronous motor starting control. The relay captures data from the motor excitation system and provides functional elements, together with exciter field control, and event report information for complete synchronous motor protection and starting control of both brush and brushless synchronous motors. The Broken Rotor Bar Detection (BBD) element in red is an element that now comes standard in the base SEL-710-5. It is designed for induction motors and provides yet another way to detect and report possible rotor problems early.
APP710_RelayProtection_r6
22
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported only in Slot E of the SEL-710-5 Relay, this card has four arc-flash fiber-optic transmit and receive inputs (AF1–AF4) and three differential current inputs (IA87, IB87, and IC87).
APP710_RelayProtection_r6
23
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported only in Slot E of the SEL-710-5 Relay, this card has eight arc-flash fiber-optic transmit and receive inputs (AF1–AF8).
APP710_RelayProtection_r6
24
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported only in Slot E of the SEL-710-5 Relay, this card has three synchronous motor inputs (VDR, VEX, and IEX) and three differential current inputs ((IA87, IB87, and IC87). IEX can use either (0 to 10 V) voltage or (4 to 20 mA) current input based on the position of the DCCT switch.
APP710_RelayProtection_r6
25
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
This module provides attenuation to the VDR and VEX voltages when connected to the relay. •
VDR divider dc ratio: 5.4
•
VEX divider dc ratio: 2.1
Motor Connector, Pin Motor Side Connections •
1 VDRM+, Field discharge resistor voltage (positive)
•
6 VDRM—, Field discharge resistor voltage (negative)
•
11 VEXM+, Exciter voltage (positive)
•
16 VEXM—, Exciter voltage (negative)
Relay Connector, Pin Relay Side Connections •
1 VDR+, Field discharge resistor voltage (positive) to E01
•
3 VDR—, Field discharge resistor voltage (negative) to E02
•
6 VEX+, Exciter voltage (positive) to E03
•
8 VEX—, Exciter voltage (negative) to E04
NOTE: Cable length has a negligible impact on signal accuracy, but it may impact noise pickup. To minimize noise coupling, you should place the module near the synchronous motor field winding. Use a 14–18 AWG shielded twisted-pair with the shield grounded at the relay cabinet to minimize noise coupling. APP710_RelayProtection_r6
26
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Slot B is the communications board. The standard communications configuration includes EIA-232 front/rear ports, a fiber-optic serial port, and an IRIG-B input. SEL protocols include SEL ASCII, Compressed ASCII, Fast Meter, Fast Operate, and Fast Message. Communication options include an EIA-485 port, Ethernet ports, or a PTC thermistor input. Both copper (10/100 BASE-T) and fiber (100 BASE-FX) are available as ordering options. DNP3 protocol is available only in the SEL-710-5. Refer to SEL-710 or SEL-710-5 ordering information for available combinations of the communications options.
APP710_RelayProtection_r6
27
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
APP710_RelayProtection_r6
28
APP710_RelayProtection_r6
1
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Use the SEL-710 Relay to protect and control all types of three-phase motors, including full-voltage, two-speed, and reduced-voltage start and high-inertia motors.
APP710_RelayProtection_r6
2
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Apply flexible I/O to meet many needs. The base unit includes three digital outputs (DO) and two digital inputs (DI). Three positions accept plug-in option cards. The picture shows three I/O cards and their terminal connectors installed. •
Simplify indication and operation with user-configurable labels for LEDs and pushbuttons
•
Rapidly move information with optional Ethernet network communications
•
Improve safety with an optional fiber-optic serial port
•
Synchronize time with the IRIG-B input to time-tag DI transitions and trigger times for oscillographic event reports
APP710_RelayProtection_r6
3
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The upper part of the SEL-710-5 front panel remains unchanged and very familiar, with a clear twoline front-panel display and easy-to-understand directional navigation. The SEL-710-5 features eight configurable pushbutton controls and 16 configurable, tricolored lightemitting diodes (LEDs) in the auxiliary control section of the front panel. With the exception of the Enabled and Trip LEDs, six of the eight tricolored LEDs on the far left side of the front panel can be configured to reflect relay operating conditions other than the factorydefault programming. The flexible I/O can be applied to meet many needs. The base unit includes three digital outputs (DO) and two digital inputs (DI) in Slot A. Slot Z includes the standard current transformer (CT) and potential transformer (PT) inputs. Slot B allows a variety of communications and time-synchronizing options. Slots C, D, and E accept plug-in option cards. Slot E allows for applications like arc-flash protection, motor differential protection, and synchronous motor protection. Slots C, D, and E also allow for resistance temperature detector (RTD) measurements and a variety of additional I/O combinations. In the back of the relay are rapid-connect plugs for easy prewiring and replacement. You can order the relay as a base unit with no additional cards in the expansion slots or with option cards already installed. You can also install new cards in the field without factory recalibration.
APP710_RelayProtection_r6
4
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The SEL-710 offers an extensive set of motor start and stop controls. Standard input/output includes Form C fail-safe and nonfail-safe TRIP outputs and two additional Form A auxiliary outputs. Two standard inputs externally wetted by 24, 48, 110, 125, 220, or 250 Vac/Vdc (select at ordering) are provided. Relay power supply, auxiliary outputs and trip outputs, and Inputs IN101 and IN102 are on the circuit board located in Position A. Motor Start Control Protection Inhibit (Starting) Start Motor Timer Notching or Jogging (66) TCU Start Inhibit Antibackspin Timer Emergency Start Two-Speed Operation Reduced Voltage Starting (19) Stall: Speed Switch (14) Motor Stop Control Fail-Safe/Nonfail-Safe Form C TRIP Outputs (OUT103) Standard I/O Form C TRIP Outputs (OUT103) AUX Outputs OUT101 and OUT102 Inputs IN101 and IN102 Control Voltages 24, 48, 110, 125, 220, 250 Vdc/Vac APP710_RelayProtection_r6
5
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The relay has two power supply options: a high-voltage power supply that has a broad operating range that can accept ac or dc inputs or a low-voltage power supply for dc power only. If the relay is powered by ac, the burden is <40 VA; if the relay is powered by dc, the burden is <20 W.
APP710_RelayProtection_r6
6
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The base unit SEL-710 is equipped with four current transformer (CT) inputs: IA, IB, IC, and IN. The input must be specified at the time of order for either 1 A nominal or 5 A nominal CT secondary inputs. The relay can also be ordered to work with ZSCTs with a 50:0.025 ratio. The relay sequence current and power measurements are sensitive to the polarity of the current applied to the relay. Make sure that the current connections observe the polarity markings. Oddnumbered terminals should be connected to the polarity side of the CT. The relay IN input can be connected in one of two ways. The preferred method is the ground CT (zero-sequence current transformer, ZSCT). This connection will normally use a lower-ratio (greater sensitivity) CT that is less susceptible to saturation. Alternately, IN may be connected residually, requiring a relatively high overcurrent element pickup setting to avoid tripping due to false residual current caused by phase CT saturation during high starting current.
APP710_RelayProtection_r6
7
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in Slot Z of the SEL-710-5 Relay, this card has current inputs for three-phase CTs, neutral current CTs, and voltage inputs for three-phase (wye or delta) PTs.
APP710_RelayProtection_r6
8
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The optional voltage input card installed in Position E adds undervoltage, overvoltage, underpower, power factor, reactive power, and voltage-based frequency measurement. The underpower element (37) measures power in kVA. The 47 phase reversal element becomes a voltage-based element. Connect three-phase secondary voltages derived from open-delta-connected PTs or wye-connected PTs. All the control functions remain the same as in the base unit. The SEL-710 also supports a single-phase voltage input (phantom voltage). 27: Undervoltage 59: Overvoltage LC: Load control (power) 47: Phase reversal (becomes a voltage-based element) VAR: VAR elements 37: Underpower elements 55: Power factor 81: Frequency elements (becomes a voltage-based element)
APP710_RelayProtection_r6
9
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
There are two different voltage cards available. •
A standalone voltage card that includes three-phase ac voltage inputs that can be used for either wye- or open-delta-connected PTs
•
A voltage card that includes three ac current for motor differential
You can use only one of these cards per relay, and it must be in Slot E.
APP710_RelayProtection_r6
10
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
A base unit, a voltage input card, an I/O expansion card, and an RTD module provide useful features. Add a communications card for interconnection into existing control and automation systems. I/O expansion •
Four outputs (OUT401, OUT402, OUT403, OUT404)
•
Three inputs (IN401, IN402, IN403)
•
Analog output (4 to 20 mA)
Base unit control •
Motor start control
•
Motor stop control
•
Standard I/O
APP710_RelayProtection_r6
11
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The base unit has two digital inputs, three digital outputs, and three card slots that you can populate with a mix of I/O cards. The first column of the table indicates the I/O types available. The abbreviations for DI, DO, AI, and AO are common in the instrumentation and control (I&C) and SCADA (supervisory control and data acquisition) industries. If there are any of the same type of points available in the base unit, they are shown in the second column. The third column shows the number of I/O points of each type provided by an available plug-in card. The last columns indicate the maximum number of cards and points provided if you select all of the base options and install cards in the maximum number of card slots allowed.
APP710_RelayProtection_r6
12
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has eight analog inputs. x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
13
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in only one of the non-base unit slots (Slot C through Slot E), this card has four analog inputs and four analog outputs (AO). x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
14
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has eight digital inputs. x = 3, 4, or 5 (e.g., IN401, IN402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
15
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has four digital inputs and four digital outputs. The four outputs are normally open contact outputs. NOTE: All digital input and digital output (including high-current, high-speed, hybrid) connections are polarity neutral. x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
16
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in one non-base unit slot (Slot C, D, or E), this card has three digital inputs, four digital outputs, and one analog output. NOTE: All digital input and digital output (including high-current, high-speed, hybrid) connections are polarity neutral. x = 3, 4, or 5 (e.g., AI401, AI402, etc., if the card was installed in Slot D).
APP710_RelayProtection_r6
17
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in Slot D only, this card has 10 three-wire RTD inputs. NOTE: All RTD Comp/Shield terminals are internally connected to the relay chassis and ground. NOTE: Analog inputs cannot provide loop power. Each analog output is self-powered and has an isolated power supply. NOTE: Analog outputs are isolated from each other and from the chassis ground.
APP710_RelayProtection_r6
18
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported in any non-base unit slot (Slot C through Slot E), this card has eight digital outputs. x = 3, 4, or 5 (e.g., OUT401, OUT402, etc., if the card was installed in Slot D). The 8 DO card shown above is all Form-A contacts. Refer to the SEL-710-5 Model Option Table for all the variants available (8A, 8B, 4A/4B, 2A/6B, 6A/2B).
APP710_RelayProtection_r6
19
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The optional current differential card installed in Position E adds current differential (4 wires) along with the voltage inputs below. Current differential is available only with the voltage inputs. The optional voltage inputs card installed in Position E adds undervoltage, overvoltage, underpower, power factor, reactive power, and voltage-based frequency measurement. The underpower element (37) measures power in kVA. The 47 phase reversal element becomes a voltage-based element. Connect three-phase secondary voltages derived from open-delta-connected PTs or wye-connected PTs. All the control functions remain the same as in the base unit. 27: Undervoltage 59: Overvoltage LC: Load control (power) 47: Phase reversal (becomes a voltage-based element) VAR: VAR elements 37: Underpower elements 55: Power factor 81: Frequency elements (becomes a voltage-based element) Also supports a single-phase voltage input (phantom voltage)
APP710_RelayProtection_r6
20
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Differential protection is supported with the differential card, identified with the IA87, IB87, IC87 current inputs. When you order the differential function, it comes with the voltage functions mentioned earlier.
APP710_RelayProtection_r6
21
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
The functional overview shown on this slide illustrates the advanced protection available in the SEL-710 family and highlights a few of the new features available only in the SEL-710-5. Outlined in blue are the overcurrent supervised arc-flash elements. When this option is selected and combined with high-speed and high-current-interrupting contacts, this AFD protection delivers high-speed performance (4 milliseconds typical) to reduce incident energy of arcing faults in the protection zone. This reduction in incident energy can greatly improve worker safety. Outlined in green are the optional elements exclusively added for synchronous motor protection, field monitoring, and synchronous motor starting control. The relay captures data from the motor excitation system and provides functional elements, together with exciter field control, and event report information for complete synchronous motor protection and starting control of both brush and brushless synchronous motors. The Broken Rotor Bar Detection (BBD) element in red is an element that now comes standard in the base SEL-710-5. It is designed for induction motors and provides yet another way to detect and report possible rotor problems early.
APP710_RelayProtection_r6
22
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported only in Slot E of the SEL-710-5 Relay, this card has four arc-flash fiber-optic transmit and receive inputs (AF1–AF4) and three differential current inputs (IA87, IB87, and IC87).
APP710_RelayProtection_r6
23
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported only in Slot E of the SEL-710-5 Relay, this card has eight arc-flash fiber-optic transmit and receive inputs (AF1–AF8).
APP710_RelayProtection_r6
24
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Supported only in Slot E of the SEL-710-5 Relay, this card has three synchronous motor inputs (VDR, VEX, and IEX) and three differential current inputs ((IA87, IB87, and IC87). IEX can use either (0 to 10 V) voltage or (4 to 20 mA) current input based on the position of the DCCT switch.
APP710_RelayProtection_r6
25
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
This module provides attenuation to the VDR and VEX voltages when connected to the relay. •
VDR divider dc ratio: 5.4
•
VEX divider dc ratio: 2.1
Motor Connector, Pin Motor Side Connections •
1 VDRM+, Field discharge resistor voltage (positive)
•
6 VDRM—, Field discharge resistor voltage (negative)
•
11 VEXM+, Exciter voltage (positive)
•
16 VEXM—, Exciter voltage (negative)
Relay Connector, Pin Relay Side Connections •
1 VDR+, Field discharge resistor voltage (positive) to E01
•
3 VDR—, Field discharge resistor voltage (negative) to E02
•
6 VEX+, Exciter voltage (positive) to E03
•
8 VEX—, Exciter voltage (negative) to E04
NOTE: Cable length has a negligible impact on signal accuracy, but it may impact noise pickup. To minimize noise coupling, you should place the module near the synchronous motor field winding. Use a 14–18 AWG shielded twisted-pair with the shield grounded at the relay cabinet to minimize noise coupling. APP710_RelayProtection_r6
26
SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
Slot B is the communications board. The standard communications configuration includes EIA-232 front/rear ports, a fiber-optic serial port, and an IRIG-B input. SEL protocols include SEL ASCII, Compressed ASCII, Fast Meter, Fast Operate, and Fast Message. Communication options include an EIA-485 port, Ethernet ports, or a PTC thermistor input. Both copper (10/100 BASE-T) and fiber (100 BASE-FX) are available as ordering options. DNP3 protocol is available only in the SEL-710-5. Refer to SEL-710 or SEL-710-5 ordering information for available combinations of the communications options.
APP710_RelayProtection_r6
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SEL-710 and SEL-710-5 Relay Hardware Options and Available Elements
APP710_RelayProtection_r6
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