Predictika · Protection relay orders

An AI sales agent's feeder relay order, checked before it goes out

An AI sales agent prepares an order for a feeder protection relay: firmware, power supply, communications, input and output cards in the optional slots, and the current input card. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the relay's published model option table and returns a verdict, every reason and the figures it computed.

Scope: SEL-751A Feeder Protection Relay orders: firmware, power supply, Ethernet and protocol options, I/O and voltage cards in slots C, D and E, and the current card in slot Z. See everything this validator covers

This validator models SEL-751A option selections as published in the SEL-751A data sheet model option table (read October 6, 2026), not just the scenarios shown below.

  • Options and slots — firmware (standard, with reclosing, with configurable labels), power supply range, Ethernet and serial options, protocol options, and which cards the table offers for slots C, D and E.
  • Card limits — only one 3 DI / 4 DO / 1 AO card and one 4 AI / 4 AO card per chassis; IEC 61850 needs Ethernet; the voltage cards, monitoring package, advanced metering and protection package, residual current input and arc-flash detection inputs each need the matching slot E card.
  • Totals and ratings — digital inputs and outputs supplied by the power supply and cards against what the customer needs and what the order states; phase and neutral current ratings of the slot Z card against the customer's transformers; arc-flash detection without the fast high-current card goes to a person.

Any SEL-751A order that touches these rules is in scope — not only the scenarios pictured here. Not covered: prices (SEL does not publish list prices, so this validator produces no price build-up or line-item quote), digital-input voltage ratings, conformal coat, the complete part number string, other SEL relays and other models, accessories, software and services.

The AI sales agentBuilds the relay order from the conversation and says it is ready.
Predictika validatorChecks every rule at once and returns the verdict, each finding, and the computed figures.

7 scenarios in 3 groups · each group runs from the agent’s first attempt to the outcome · click one to switch

What the agent proposes

The AI sales agent says

Illustrative agent statement. The validator receives the structured request below.

Proposing agent: AI sales agent (scripted)

Before sending, the agent must call Recorded run

Predictika validator


      

        
        
        
      

      
Waiting for the call.

      
    

  

  
  

    
Where rules-based CPQ gets it wrong
Click to expand
    
Our assessment of what a typical rules-based CPQ (product rules, price rules and validation rules, as in Salesforce CPQ) does with the same cases. It is a judgment about effort and reliability, not a claim that nothing can be built.

    
What the validator caughtTypical rules-based CPQPredictika
Cards that fit only some slotsOnly with care
A rule per card and slot works, but the list of which slot takes which card must be kept in step with the option table.		The slot of every card is checked together with the rest of the order.
An option that depends on another option: IEC 61850 needs EthernetOnly with workarounds
The protocol and the port are separate choices, so the dependency needs a cross-option rule that rarely stays in sync as options are added.		The protocol and port choices travel in one request and the dependency is checked with the rest.
A limit across slots: one 3 DI / 4 DO / 1 AO card per chassisOnly with workarounds
The count spans three slots, so it needs a rollup field and a rule that reads it.		The count across all slots is computed and checked on every call.
Digital input and output totals that must match what the order statesOnly with care
Each card adds a different number, so a total has to be rolled up and compared with a typed figure.		The totals are computed from the cards and compared with the stated totals.
Every problem returned in one answerOnly with workarounds
Rules tend to fire as the order is saved or a step is completed, so a rep often fixes one error and meets the next.		All findings come back together, whatever order the choices arrived in.

  

  

    
What this validator catches: findings from its test cases
Click to expand
    
Every rule is checked on every call, in any order the choices arrive; one problem never hides another. Blocking findings stop the quote; approval findings need a person to sign off; everything else is computed.

    
1The selected protocol option includes IEC 61850, which the model option table says requires Ethernet, and the selected port option has no Ethernet.
2The customer needs IEC 61850 but the selected protocol option does not include it.
3The customer needs DNP3 but the selected protocol option does not include it.
4The slot C, D and E selections include 1 card(s) that the model option table does not offer for that slot.
5The customer needs 12 digital inputs but the selected power supply and cards provide 10.
6The order has 2 3 DI / 4 DO / 1 AO cards; the model option table allows only one per chassis.
7The order has 2 4 AI / 4 AO cards; the model option table allows only one per chassis.
8The customer needs 15 digital inputs but the selected power supply and cards provide 14.
9The customer needs 8 digital outputs but the selected power supply and cards provide 7.
10The order states 16 digital inputs in total; the selected power supply and cards provide 14.
11The order states 4 digital outputs in total; the selected power supply and cards provide 7.
12The selected power supply range does not match the supply the site has (110 to 250 Vdc or 110 to 240 Vac, or 24 to 48 Vdc).
13The customer needs reclosing but the selected firmware option does not include it.
14The customer needs configurable labels but the selected firmware option does not include them.
15The customer needs AC voltage inputs but slot E has no voltage input card.
16The customer needs synchronism check and battery monitor inputs, which need the monitoring package or higher in slot E.
17The customer needs directional power, which needs the advanced metering and protection package or higher in slot E.
18The customer needs a residual current (IG) input, which needs the 5 AVI / 1 ACI card in slot E.
19The customer needs arc-flash detection, which needs the 3 AVI / 4 AFDI card in slot E.
20Arc-flash detection is ordered without a 4 DI / 4 DO fast high-current interrupting card; the data sheet says that card is required to reach the 2 to 5 ms operate times, so a person should confirm.
21The customer has 1 A phase current transformers but the selected current card is for 5 A phase.
22The neutral current input of the selected current card does not match the neutral transformer the customer has.

  

  

    
Scenarios and results
Click to expand
    
The recorded result of the validator for each scenario on this page: the request the AI agent sent, the verdict, and every finding, in the order they appear above.

    
1. Communications and totals: IEC 61850 ordered with no Ethernet port and an understated input total

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware plus reclosing, the 110 to 250 Vdc / 110 to 240 Vac power supply, no Ethernet and a rear EIA-485 port, the standard protocols plus DNP3 and IEC 61850, a 4 DI / 4 DO card in slot C, a 4 DI / 4 DO card in slot D, a 5 AVI card with the advanced metering and protection package in slot E and the 5 A phase and 5 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 5 A phase and 5 A neutral transformers, that needs 10 digital inputs and 9 digital outputs, reclosing, IEC 61850, DNP3 and AC voltage inputs. The order states 12 digital inputs and 11 digital outputs in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • IEC 61850 selected without Ethernet. The selected protocol option includes IEC 61850, which the model option table says requires Ethernet, and the selected port option has no Ethernet.
    • 
      
  • Stated digital inputs do not match. The order states 12 digital inputs in total; the selected power supply and cards provide 10.
    • 
    

    
2. Communications and totals: The agent resubmits after fixing the errors

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware plus reclosing, the 110 to 250 Vdc / 110 to 240 Vac power supply, dual 10/100Base-T Ethernet ports and a rear EIA-232 port, the standard protocols plus DNP3 and IEC 61850, a 4 DI / 4 DO card in slot C, a 4 DI / 4 DO card in slot D, a 5 AVI card with the advanced metering and protection package in slot E and the 5 A phase and 5 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 5 A phase and 5 A neutral transformers, that needs 10 digital inputs and 9 digital outputs, reclosing, IEC 61850, DNP3 and AC voltage inputs. The order states 10 digital inputs and 11 digital outputs in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 10 digital inputs and 11 digital outputs in total from the power supply and cards.
    • 
    

    
3. Slots and firmware: Cards in the wrong slots, and firmware without reclosing or labels

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware, the 110 to 250 Vdc / 110 to 240 Vac power supply, one 10/100Base-T Ethernet port and a rear EIA-232 port, the standard protocols plus DNP3 and IEC 61850, a 10 RTD input card in slot C, a 3 AVI voltage card in slot D, a 4 DI / 4 DO card in slot E and the 5 A phase and 5 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 5 A phase and 5 A neutral transformers, that needs 6 digital inputs and 6 digital outputs, reclosing, configurable labels, IEC 61850, DNP3 and AC voltage inputs. The order states 6 digital inputs and 7 digital outputs in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Card selected for a slot that does not offer it. The slot C, D and E selections include 2 card(s) that the model option table does not offer for that slot.
    • 
      
  • Reclosing needed but not ordered. The customer needs reclosing but the selected firmware option does not include it.
    • 
      
  • Configurable labels needed but not ordered. The customer needs configurable labels but the selected firmware option does not include them.
    • 
      
  • AC voltage inputs needed but not ordered. The customer needs AC voltage inputs but slot E has no voltage input card.
    • 
    

    
4. Slots and firmware: The agent resubmits after fixing the errors

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware, the 110 to 250 Vdc / 110 to 240 Vac power supply, one 10/100Base-T Ethernet port and a rear EIA-232 port, the standard protocols plus DNP3 and IEC 61850, a 4 DI / 4 DO card in slot C, a 10 RTD input card in slot D, a 5 AVI card with the advanced metering and protection package in slot E and the 5 A phase and 5 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 5 A phase and 5 A neutral transformers, that needs 6 digital inputs and 6 digital outputs, reclosing, configurable labels, IEC 61850, DNP3 and AC voltage inputs. The order states 6 digital inputs and 7 digital outputs in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Reclosing needed but not ordered. The customer needs reclosing but the selected firmware option does not include it.
    • 
      
  • Configurable labels needed but not ordered. The customer needs configurable labels but the selected firmware option does not include them.
    • 
    

    
5. Slots and firmware: The agent resubmits after fixing the errors

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware plus reclosing with configurable labels, the 110 to 250 Vdc / 110 to 240 Vac power supply, one 10/100Base-T Ethernet port and a rear EIA-232 port, the standard protocols plus DNP3 and IEC 61850, a 4 DI / 4 DO card in slot C, a 10 RTD input card in slot D, a 5 AVI card with the advanced metering and protection package in slot E and the 5 A phase and 5 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 5 A phase and 5 A neutral transformers, that needs 6 digital inputs and 6 digital outputs, reclosing, configurable labels, IEC 61850, DNP3 and AC voltage inputs. The order states 6 digital inputs and 7 digital outputs in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 6 digital inputs and 7 digital outputs in total from the power supply and cards.
    • 
    

    
6. Arc-flash detection: Arc-flash card without the fast card, and an understated output total

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware plus reclosing with configurable labels, the 110 to 250 Vdc / 110 to 240 Vac power supply, dual 10/100Base-T Ethernet ports and a rear EIA-232 port, the standard protocols plus DNP3 and IEC 61850, a 4 DI / 4 DO card in slot C, an 8 DI card in slot D, a 3 AVI / 4 AFDI arc-flash detection card in slot E and the 1 A phase and 1 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 1 A phase and 1 A neutral transformers, that needs 14 digital inputs and 6 digital outputs, reclosing, configurable labels, IEC 61850, DNP3, AC voltage inputs, synchronism check and arc-flash detection. The order states 14 digital inputs and 6 digital outputs in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Stated digital outputs do not match. The order states 6 digital outputs in total; the selected power supply and cards provide 7.
    • 
      
  • Arc-flash detection without the fast card. Arc-flash detection is ordered without a 4 DI / 4 DO fast high-current interrupting card; the data sheet says that card is required to reach the 2 to 5 ms operate times, so a person should confirm.
    • 
    

    
7. Arc-flash detection: The agent resubmits after fixing the errors

    
The agent's request. Please quote one SEL-751A Feeder Protection Relay with standard firmware plus reclosing with configurable labels, the 110 to 250 Vdc / 110 to 240 Vac power supply, dual 10/100Base-T Ethernet ports and a rear EIA-232 port, the standard protocols plus DNP3 and IEC 61850, a 4 DI / 4 DO fast high-current interrupting card in slot C, an 8 DI card in slot D, a 3 AVI / 4 AFDI arc-flash detection card in slot E and the 1 A phase and 1 A neutral current card, for a site with a 110 to 250 Vdc / 110 to 240 Vac supply and 1 A phase and 1 A neutral transformers, that needs 14 digital inputs and 6 digital outputs, reclosing, configurable labels, IEC 61850, DNP3, AC voltage inputs, synchronism check and arc-flash detection. The order states 14 digital inputs and 7 digital outputs in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 14 digital inputs and 7 digital outputs in total from the power supply and cards.
    • 
    

  

  

    
Narration transcript
Click to expand
    
The text of the narrated walkthrough, step by step.

    
    
      
  1. Welcome to a demo of Predictika's Validator. An AI sales agent prepares an order for a feeder protection relay: firmware, power supply, communications, and more. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the relay's published model option table and returns a verdict, every reason and the figures it computed.
    2. 
      
  2. I will start with the first request by the agent.
    3. 
      
  3. The agent says. Please quote one SEL-751A Feeder Protection Relay with standard firmware, the 110 to 250 Vdc / 110 to 240 Vac power supply. The order states 6 digital inputs and 7 digital outputs in total. The rest of the request is on screen.
    4. 
      
  4. Before it goes out, the agent calls the validator.
    5. 
      
  5. Blocked, with four findings, all in one answer. The slot C, D and E selections include 2 card(s) that the model option table does not offer for that slot. The customer needs reclosing but the selected firmware option does not include it. The customer needs configurable labels but the selected firmware option does not include them. The other one is on screen.
    6. 
      
  6. The validator returned four blocking findings in one answer. A check that reads one field at a time would pass most of this; it shows only when the choices in the quote are checked against each other.
    7. 
      
  7. What this shows: for cards that fit only some slots, a rules-based CPQ is error-prone for this.
    8. 
      
  8. Now the agent resubmits.
    9. 
      
  9. The corrected request. It changes the Slot C to 4 DI / 4 DO card, the Slot D to 10 RTD input card and the Slot E to 5 AVI card with the advanced metering and protection package.
    10. 
      
  10. It calls the validator again.
    11. 
      
  11. Still blocked, with two findings, all in one answer. The customer needs reclosing but the selected firmware option does not include it. The customer needs configurable labels but the selected firmware option does not include them.
    12. 
      
  12. Two findings cleared. Still blocking: reclosing needed but not ordered and configurable labels needed but not ordered.
    13. 
      
  13. The agent resubmits once more.
    14. 
      
  14. The revised request. It changes the firmware to standard firmware plus reclosing with configurable labels.
    15. 
      
  15. It calls the validator once more.
    16. 
      
  16. This time the validator clears it.
    17. 
      
  17. Both earlier findings are cleared, and the validator's figure matches the quote.
    18. 
      
  18. Four problems caught in one call, fixed in two passes, and a clean quote. That is the value of Predictika's validator: catching mistakes before they reach the customer. Now you can try the other scenarios yourself.
    19.