Predictika · Circuit protection · Fuses

An AI sales agent's Amp-Trap fuse order, checked before it goes out

An AI sales agent prepares an order for Mersen Amp-Trap fuses: the series, the ampere size, the fuse holder, and the circuit it protects, with its voltage, available fault current, load and conductor. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of fuse selection rules and returns a verdict, every reason and the figures it computed.

Scope: Mersen Amp-Trap fuses: AJT and A4J (Class J), A6D R and A2D R (Class RK1), ATDR and ATQR (Class CC), A3T (Class T), A4BQ and A4BT (Class L) and A70QS (semiconductor). See everything this validator covers

This validator models an order for 10 Amp-Trap fuse series for a circuit, not just the scenarios shown below.

  • Voltage and current — the AC and DC voltage rating of the series against the circuit, the ampere range and standard sizes of the series, and the interrupting rating against the available fault current.
  • Fit — the fuse holder class the series fits (Class J, RK, CC, T, L or semiconductor block).
  • The circuit it protects — the continuous load against 80 percent of the fuse, the conductor the fuse must protect (with the next standard size allowance going to a person), time-delay versus fast-acting fuses on motors and transformers, motor fuse sizing against full-load current, and semiconductor loads that need a semiconductor fuse.
  • Order figures — circuits and poles of at least one, and the total number of fuses the order states, which must equal circuits times poles.

Any order for these series that touches these rules is in scope — not only the scenarios pictured here. Not covered: prices (this page shows no price build-up), fuse holders and blocks as separate products, other Mersen product lines such as photovoltaic (gPV), high-speed and Class L variants not listed, and coordination studies.

The AI sales agentBuilds the fuse 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
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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
Voltage, ampere and interrupting limits that differ for each of 10 fuse seriesOnly with workarounds
Every series has its own AC and DC voltage, ampere range, standard sizes and interrupting rating. A rules-based CPQ needs a table or a set of rules per series, and a catalog update means editing each of them.		The series arrives in one request and every limit for it is looked up and checked together.
Several problems in one order, such as a fast-acting fuse on a motor, in the wrong holder, above the conductorOnly with workarounds
Rules tend to fire as the order is saved or a step is completed, so a person often fixes one error and meets the next.		All findings come back together, whatever order the choices arrived in.
The load and conductor the fuse protectsOnly with care
The 80 percent continuous load rule, conductor protection and motor sizing need arithmetic on fields the order carries, with a next-size-up allowance that goes to a person.		The load, conductor and fuse size are fields in the request and are compared on every call.
Holder class that must match the seriesOnly with care
A compatibility table between each series and each holder class has to be kept up to date.		The holder is checked against the series in the same request.
Total number of fuses the order statesOnly with care
The stated total is derived from circuits and poles, so a rule has to recompute it and compare.		The stated total is a field in the request, compared with the computed one on every call.

  

  

    
What this validator catches: findings from its test cases
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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 order has 0 circuits of 3 poles; at least 1 of each is needed.
2The circuit is 690 volts AC; this fuse series is rated 600 volts AC.
3The circuit is 480 volts AC; this fuse series is rated 250 volts AC.
4The circuit is 600 volts DC; this fuse series is rated 500 volts DC (0 means not rated for DC).
5The circuit is 480 volts DC; this fuse series is rated 0 volts DC (0 means not rated for DC).
6This fuse series is made from 1 to 600 amperes; the order is for 700 amperes.
785 amperes is not a standard ampere size for this fuse series.
8This fuse series is made from 1 to 30 amperes; the order is for 40 amperes.
9This fuse does not fit the selected fuse holder class.
10The available fault current is 250 kA; this fuse is rated to interrupt 200 kA.
11The available fault current is 120 kA; this fuse is rated to interrupt 100 kA.
12The load of 90 amperes is more than 80 percent of the 100 ampere fuse.
13The fuse is above the conductor ampacity but within 25 percent; a person should confirm the next standard size allowance for this conductor.
14The 150 ampere fuse is too far above the 100 ampere conductor to protect it.
15A fast-acting fuse would open on motor starting current; a time-delay series is needed for a motor.
16The time-delay fuse is above 175 percent of the motor full-load current; a person should confirm it for this motor.
17The 100 ampere time-delay fuse is more than 225 percent of the 40 ampere motor full-load current.
18A fast-acting fuse on a transformer circuit may open on inrush current; a person should confirm it.
19A semiconductor load needs a semiconductor fuse series such as the A70QS.
20The circuit is 750 volts AC; this fuse series is rated 700 volts AC.

  

  

    
Scenarios and results
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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. Motor control center feeders: 12 three-pole circuits of A4J200 fuses for a 96 ampere motor

    
The agent's request. Please quote 12 circuits of 3 poles with A4J200 fuses in Class RK holders, for a motor on a 480 volt AC circuit with 96 amperes of load, a 150 ampere conductor and 65 kA of available fault current. The order states 36 fuses in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Holder class does not match. This fuse does not fit the selected fuse holder class.
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  • Fuse does not protect the conductor. The 200 ampere fuse is too far above the 150 ampere conductor to protect it.
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  • Fast-acting fuse on a motor. A fast-acting fuse would open on motor starting current; a time-delay series is needed for a motor.
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2. Motor control center feeders: The agent resubmits after fixing the errors

    
The agent's request. Please quote 12 circuits of 3 poles with AJT150 fuses in Class J holders, for a motor on a 480 volt AC circuit with 96 amperes of load, a 150 ampere conductor and 65 kA of available fault current. The order states 36 fuses in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 12 circuit(s) of 3 pole(s), 36 fuse(s) of 150 amperes in total.
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3. DC bus protection: 8 two-pole circuits of A2D200R fuses on a 600 volt DC bus

    
The agent's request. Please quote 8 circuits of 2 poles with A2D200R fuses in Class RK holders, for a feeder on a 600 volt DC circuit with 140 amperes of load, a 200 ampere conductor and 50 kA of available fault current. The order states 16 fuses in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • DC voltage rating too low. The circuit is 600 volts DC; this fuse series is rated 250 volts DC (0 means not rated for DC).
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4. DC bus protection: The agent resubmits after fixing the errors

    
The agent's request. Please quote 8 circuits of 2 poles with AJT200 fuses in Class J holders, for a feeder on a 600 volt DC circuit with 140 amperes of load, a 200 ampere conductor and 50 kA of available fault current. The order states 16 fuses in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • DC voltage rating too low. The circuit is 600 volts DC; this fuse series is rated 500 volts DC (0 means not rated for DC).
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5. DC bus protection: The agent resubmits after fixing the errors

    
The agent's request. Please quote 8 circuits of 2 poles with A6D200R fuses in Class RK holders, for a feeder on a 600 volt DC circuit with 140 amperes of load, a 200 ampere conductor and 50 kA of available fault current. The order states 16 fuses in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 8 circuit(s) of 2 pole(s), 16 fuse(s) of 200 amperes in total.
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6. Drive rectifier protection: 6 three-pole circuits of AJT150 fuses for a drive rectifier

    
The agent's request. Please quote 6 circuits of 3 poles with AJT150 fuses in Class J holders, for a semiconductor (drive rectifier) load on a 600 volt AC circuit with 100 amperes of load, a 150 ampere conductor and 100 kA of available fault current. The order states 18 fuses in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Semiconductor load needs a semiconductor fuse. A semiconductor load needs a semiconductor fuse series such as the A70QS.
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7. Drive rectifier protection: The agent resubmits after fixing the errors

    
The agent's request. Please quote 6 circuits of 3 poles with A70QS150 fuses in semiconductor fuse block holders, for a semiconductor (drive rectifier) load on a 600 volt AC circuit with 100 amperes of load, a 150 ampere conductor and 100 kA of available fault current. The order states 18 fuses in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 6 circuit(s) of 3 pole(s), 18 fuse(s) of 150 amperes in total.
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Narration transcript
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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 Mersen Amp-Trap fuses: the series, the ampere size, the fuse holder, and more. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of fuse selection rules 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 12 circuits of 3 poles with A4J200 fuses in Class RK holders, for a motor on a 480 volt AC circuit with 96 amperes of load. The order states 36 fuses 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 three findings, all in one answer. This fuse does not fit the selected fuse holder class. The 200 ampere fuse is too far above the 150 ampere conductor to protect it. A fast-acting fuse would open on motor starting current; a time-delay series is needed for a motor.
    6. 
      
  6. The validator returned three 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.
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  7. What this shows: for several problems in one order, such as a fast-acting fuse on a motor, in the wrong holder, above the conductor, a rules-based CPQ can do this only with workarounds.
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  8. Now the agent resubmits.
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  9. The corrected request. It changes the fuse to AJT150 and the fuse holder to class j.
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  10. It calls the validator again.
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  11. This time the validator clears it.
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  12. All three earlier findings are cleared, and the validator's figure matches the quote.
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  13. Three problems caught in one call, fixed in one pass, 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.
    14.