Editable 4I+4V + virtual terminals
Configured RMS magnitude/angle sources drive instantaneous waveforms through explicit virtual analog wiring to relay terminals.
Closed-loop feeder laboratory
Secondary injection with external virtual-I/O timing.
Causal acquisition
Signed terminal samples pass clipping, 16-bit-equivalent quantization, 1.5 ms behavioral delay, and a one-cycle rolling DFT on a 4 kHz grid.
1 µs clock · 10 kHz BI
Independent binary inputs sample at 100 µs with separate 0.5 ms deglitch and zero debounce holdoff in the default profile.
External trip authority
Accepted TESTSET BI1 owns measured trip and optional auto-stop. Internal relay trip state is never a direct TESTSET shortcut.
Generic pickup authority
TESTSET BI2 represents wired ANY PICKUP and is explicitly distinct from the pickup of the element that ultimately operates.
One-click re-arm
RESET settles stale causal acquisition, clears relay state once, releases contacts/BI inputs, preserves frozen evidence, and reports READY TO RE-ARM only after the postcondition.
Process bus
Inspect live and recorded IEC 61850 Sampled Values.
Live Npcap capture
Select an authorized Windows adapter and inspect laboratory Sampled Values traffic.
PCAP / PCAPNG replay
Replay captured frames for repeatable analysis, teaching, regression, and FAT/SAT preparation.
SCL-assisted binding
Review APPID, destination MAC, VLAN, svID, dataset, confRev, channel mapping, scaling provenance, quality, and continuity.
Feeder protection
Evaluate implemented multifunction elements.
| ANSI | Function | Current scope |
|---|---|---|
| 50P-1 | Phase overcurrent | Pickup/dropout, definite delay, operation evidence |
| 51P | Time phase overcurrent | IEC inverse and definite-time behavior, TMS/reset modes |
| 50N / 51N | Earth-fault overcurrent | Explicit IN/3I0 preferred; documented calculated fallback |
| 67P | Directional phase overcurrent | Positive-sequence polarization and directional evidence |
| 67N | Directional earth fault | Residual polarization and directional evidence |
| 27 / 59 | Under / overvoltage | Voltage measurement logic with trust-gated provenance |
| 59N | Residual overvoltage | 3V0 magnitude and definite timing |
Transformer Differential
Internal two-sided injection and paired-SV engineering.
87T / 87T-HS / REF
Generic dual-slope restrained differential, high-set differential, REF HV, and REF LV with independent neutral/NGR evidence.
Security and compensation
H2/H5 security, context-gated external-fault/CT-saturation logic, CT ratio/polarity, transformer rating, and supported vector-group compensation.
Two test paths
Run the deterministic 10-scenario packaged-core self-test and synchronized internal HV/LV/neutral injection, or move to paired external SV live/replay.
AVR / OLTC and MMS
Evaluate virtual voltage regulation as an IEC 61850 IED.
Simulated plant
Virtual transformer and 17-position OLTC provide repeatable voltage-regulation and tap feedback behavior.
Authority and interlocks
Modeled LOCAL/REMOTE and AUTO/MANUAL states constrain virtual tap/control action.
Laboratory MMS
Browse/read, DataSets, reports, GI/integrity, modeled SBO/SBOw controls, and virtual AVR settings terminate inside the simulated process.
Evidence and trust
Preserve causality instead of only final state.
Settings identity
Setting groups, revisions, presets, engineering context, and SHA-256 fingerprints.
Trust authority
AllowsMeasurement, AllowsPickup, and AllowsTrip keep diagnostic visibility separate from new protection authority.
Schema 9 closed-loop evidence
Run/topology identity, timing resolution, first-any-pickup source, operated-element correlation, TESTSET BI events, trip request, output stop, and frozen capture relationship.
Capability boundary
Implemented behavior is not a stronger metrology or certification claim.
ARVREL remains virtual-output laboratory software. It does not claim calibrated secondary injection, a CMC or manufacturer-relay clone, IEC 61850 conformance, IEC 60255 type testing, commissioning acceptance, or protection-grade hard-real-time performance.