| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. GOVERNOR SYSTEM TESTING | |||
| A1 | Governor rope condition and tension Acceptance: Rope tension 400–600 N; centered in sheave; no fraying; no surface corrosion; smooth movement | Cl. 11.1 — Governor rope must be taut and centered | OK NC NA HOLD |
| A2 | Governor sheave rotation and bearing condition Acceptance: Sheave rotates without resistance; bearing no play; no grinding sound; properly lubricated | Cl. 11.1 — Sheave must rotate freely | OK NC NA HOLD |
| A3 | Governor speed switch trip setting verification Acceptance: Trip speed measured = 115–120% of rated speed; electrical switch functions at trip; no pre-triggering | Cl. 11.1 — Trip speed set to 115–120% of rated | OK NC NA HOLD |
| A4 | Governor trigger mechanism operation Acceptance: Trigger pin/lever moves smoothly when rope pulls; no sticking; mechanical linkage intact; easily reset | Cl. 11.1 — Trigger must engage safety gear | OK NC NA HOLD |
| B. SAFETY GEAR TESTING | |||
| B1 | Safety gear visual inspection and condition Acceptance: No cracks in frame or jaws; friction pads intact; no loose parts; mechanical action smooth | Cl. 11.2 — Safety gear must be intact | OK NC NA HOLD |
| B2 | Safety gear jaw alignment and clearance Acceptance: Jaws centered on rails; clearance 2–3 mm both sides; symmetric engagement; no binding | Cl. 11.2 — Jaws must be aligned with rails | OK NC NA HOLD |
| B3 | Friction pad material and condition Acceptance: Pads material as designed (resin or composite); surface clean; no glaze; adequate thickness (≥ 10 mm) | Cl. 11.2 — Pads must grip rails effectively | OK NC NA HOLD |
| B4 | Safety gear holding capacity test (static) Acceptance: Gear holds rated load without slipping; load held for ≥ 60 seconds; no creep; no damage to rails | Cl. 11.2 — Gear must hold rated load | OK NC NA HOLD |
| B5 | Safety gear activation and engagement test Acceptance: Trigger activates gear cleanly; jaws engage within 50 ms; no chattering; car deceleration smooth | Cl. 11.2 — Gear must engage immediately on overspeed | OK NC NA HOLD |
| C. BUFFER SYSTEM TESTING | |||
| C1 | Buffer type and design verification Acceptance: Buffer type matches design (spring/hydraulic/combination); rated for car weight + load; mounting secure | Cl. 11.3 — Buffer type selected per design | OK NC NA HOLD |
| C2 | Buffer mounting and alignment Acceptance: Buffer centered under car or counterweight; bolts torqued; alignment ≤ 5 mm; pit floor load-bearing | Cl. 11.3 — Buffer must be centered and aligned | OK NC NA HOLD |
| C3 | Buffer compression and energy absorption Acceptance: Spring compresses smoothly; hydraulic buffers show no leaks; energy absorption ≥ design load at rated speed | Cl. 11.3 — Buffer absorbs impact energy | OK NC NA HOLD |
| C4 | Buffer recovery and reset Acceptance: Spring returns fully; hydraulic buffers reset without assistance; no sticking; no residual compression | Cl. 11.3 — Buffer returns to original length | OK NC NA HOLD |