517.1 Load inventory

List drives, HPUs, heaters, beacons, and controls. Inventory anchors HVM bollard power sizing (511).

Start with a lane-by-lane list of all loads: hydraulic HPU motors, electromechanical drives, panel heaters/ventilation, beaconing, PLC/relays, and any accessory power. Record rated voltage, full-load current, duty, and quantity. For mixed systems (Auto-Hyd and Auto-EM), split per drive family, then per lane. Tie each line back to single-line diagrams from 511 Supply & Sources so sizing and protection stay consistent.

Flag items that are conditional (e.g., enclosure heaters only below setpoint; beacons only during movement). This makes later diversity credible. Add an “as-tested configuration” note where the inventory must match the certified system dependencies; cross-reference 421 rating-critical dependencies.

517.2 Steady vs transient

Separate standby vs peak draw. Distinction protects crash rated bollard supply capacity.

Document steady (standby/idle) loads—PLC, network gear, heaters on thermostat—and transient peaks—motor starts, valve actuation, beacon bursts. Capture motor starting method (across-the-line vs soft-start/VFD) and resulting inrush. This split informs cable sizing, voltage drop, and breaker curves in 514 Electrical Supply & Protection. Use time-stamped traces during 636 Performance & Duty Tests to confirm real peaks match assumptions.

517.3 Diversity factors

Apply credible concurrency; justify numerically. Diversity makes HVM bollard sizing realistic.

Not every lane moves at once. Define concurrency scenarios: single-lane, alternating lanes, or coordinated multi-lane events. Quantify with a Diversity (electrical) factor and show the math (e.g., 0.6 for four lanes where no more than two drive simultaneously). Align scenarios with 525 Modes of Operation and interlocks from 352 Interlock matrix. Keep a conservative “test of reasonableness” where an operator could still trigger near-simultaneous moves.

517.4 EFO energy allowance

Reserve energy for multiple EFOs (354). Allowance assures crash rated bollard emergency action.

Emergency Fast Operation (EFO) demands a dedicated energy block. For Auto-Hyd, check accumulator sizing and pre-charge; for Auto-EM, ensure DC bus/UPS ride-through covers back-to-back EFOs with cool-down policy (EFO cooldown). Document the minimum number of EFOs available during mains outage and how the system recovers. Reference EFO tests in 637 EFO & Failure Modes.

517.5 Backup/runtime targets

Define minimum UPS/generator runtime per mode (525). Targets keep HVM bollard safe on outage (518).

Set explicit autonomy on the UPS autonomy (e.g., 15–30 min standby + two full movement cycles) and the generator run strategy (start delay, ride-through). Tie these to operating modes in 525 and to contingencies in 518 Power Failure Modes. Include change-over logic (ATS/STS) from 511 and surge/earthing measures in 514 so transfers do not trip protection or corrupt PLC states.

517.6 Efficiency opportunities

Use soft-starts, high-efficiency motors, and sleep modes (341, 513). Efficiency lowers crash rated bollard OPEX.

Pick IE3/IE4 motors, soft-starts or VFDs (where appropriate), and “sleep” profiles that drop auxiliaries between cycles. For hydraulics, trim pump sizing, add accumulator assist, and manage oil viscosity at high ambient (see 337 Hot Climate Design). For EM drives, optimize ramp/hold torque to reduce heat and enclosure loads (link to 513 Electromechanical Drives). Confirm that efficiency changes don’t undermine rating-critical dependencies.

517.7 Metering/monitoring

Add meters and counters tied to KPIs (542, 541). Monitoring validates HVM bollard assumptions.

Install sub-meters (per panel or per lane) and cycle counters. Surface live and trended values to Operations via 541 health pings & counters and track 542 KPIs like Ops/hour and MTBF. Alerts should flag abnormal idle draw, repeated starts, phase loss, or overheating so maintenance can intervene before failure.

517.8 Verification calculations

Publish volt-drop and demand sheets (925). Calcs support crash rated bollard reviews (444).

Bundle the energy model with cable sizing and voltage drop checks from the 925 Cable Volt-Drop Calculator. For hydraulics, pair with the 924 HPU Duty/Energy Planner. Include breaker curves/coordination (514) and a short “reader guide” so reviewers can follow the assumptions chain; see 444 Evidence & Documentation.

517.9 Adjustment log

Track changes through commissioning (631–636). Logs keep HVM bollard documentation current (118).

Maintain a dated log of inventory, diversity, and runtime tweaks from pre-commission (631) to SAT (638). Once stable, export a snapshot PDF and link it in the handover pack (736). Record deltas in the project 118 Change Log so future service teams can see why the final generator/UPS differs from tender values.

517 Energy Budget — FAQ