Bandingkan operasi & pemeliharaan manual dengan smart condition-monitoring berbasis predictive maintenance — biaya rutin, downtime tak terencana, penghematan tahunan, payback dan ROI 3 tahun untuk armada peralatan Anda.
Smart O&M menggunakan condition monitoring dan predictive maintenance untuk menekan biaya inspeksi rutin dan gangguan tak terencana. Kalkulator ini membandingkan O&M manual vs smart untuk armada Anda dan mengestimasi penghematan, payback dan ROI — dengan asumsi konservatif yang diilustrasikan secara jelas.
Settings are illustrative starting points — confirm with a protection coordination study per IEC 60255 / IEEE 242.
📚 Calculation book
CALCULATION BOOK
1000 kVA · 10kV/0.4kV · single · illustrative
1. Load calculation
Standard: IEC 60076 · IEC 60364-5-52
Parameter
Formula
Value
Connected load
P = sum(kW)
900 kW
Demand factor
Kd
1
Demand power
Pd = P x Kd
900 kW
Power factor
cos(phi) before -> after
0.90 -> 0.95
Design apparent power
Sd = Pd / cos(phi)
947 kVA
Transformer loading
Sd / Srated
95%
2. Short-circuit calculation
Standard: IEC 60909
Parameter
Formula
Value
System impedance (pu)
Zs = S / Ssc
0.20% (on 1000 kVA base)
Transformer impedance
Zt = Z%
4%
Total impedance
Z = Zt + Zs
4.20%
LV prospective Isc
Isc = In / Z
34.4 kA
HV prospective Isc
Isc = Ssc / (sqrt(3) x V)
28.9 kA
Breaking check
Icu >= Isc
LV 36 kA (1.0x margin) PASS
3. Voltage drop
Standard: IEC 60364-5-52 Annex G
Parameter
Formula
Value
Main feeder
dU = sqrt(3) x I x L x R / V
240 mm² · dU 0.88% @ 60 m
Limit
max 3%
within limit
Transformer volt. reg.
dU ~ loading x Z% x sin(phi)
1.2% at full load
4. Reactive power / harmonics
Standard: IEC 61921 (PFC) · IEEE 519 (harmonics)
Parameter
Formula
Value
Required compensation
Qc = Pd x (tan1 - tan2)
140 kvar
PFC bank
standard step
150 kvar
Detuned reactor
p = 6%
9.0 kvar @ 6% (anti-resonance)
5. Grounding
Standard: IEC 60364-5-54 earthing arrangements and protective conductors LV earthing target 10 Ω (TN systems); 4 Ω used as a conservative design target · target 4 ohm
Parameter
Formula
Value
Single rod resistance
R1 = rho/(2 x pi x L) x ln(4L/d)
39.6 ohm
Rods required
n = R1 / (target x 0.8)
13 rod(s) <= 4 ohm
Rod spec
dia x length
20 mm x 2.5 m
This calculation book is illustrative it consolidates the computed values with the referenced standards. A licensed engineer must verify and seal final design documents for construction.
🔧 Secondary schematic (control & signal)
🔩 Terminal strip (typical)
📏 Standard basis (依据标准)
Topic
Standard
Reliability data
Illustrative industry-typical failure and downtime values — no specific standard
O&M mode:omMode (smart) indicates your current baseline; the calculator always compares manual vs smart O&M so you can see the achievable saving regardless of your starting point.
Illustrative assumptions:O&M cost rates (1.5% / 0.9% of asset value), the 30% failure-reduction benefit and 3% monitoring investment are industry-typical planning values, not guarantees. Actual savings depend on your failure profile and site conditions.
Not a performance warranty:Predictive maintenance reduces, but cannot eliminate, unplanned outages. ROI figures are planning estimates.
Not economical at low failure rates:If your failure rate is already low, the monitoring investment may not pay back — the calculator shows a negative saving in that case.
Scope:This is a commercial O&M comparison tool — it does not design the monitoring system. Contact us for a SCADA / condition-monitoring scope tailored to your assets.
Cara perhitungannya
Cara kerja estimasi
O&M rutin dimodelkan sebagai persentase dari nilai aset (1,5% manual vs 0,9% cerdas). Waktu henti tak terencana = kegagalan × durasi × biaya per jam, dengan pemeliharaan prediktif mengurangi kegagalan sebesar 30% yang konservatif. Penghematan tahunan = biaya manual − biaya cerdas; payback = investasi pemantauan ÷ penghematan tahunan.
Standar yang berlaku
Angka keandalan adalah nilai ilustratif yang tipikal di industri, bukan standar. Basis pemantauan merujuk pada IEC 61557 dan seri IEEE 3004 (pemantauan & proteksi) serta IEC 60076 untuk transformator.
Pertanyaan yang sering diajukan
What is predictive maintenance for power equipment?
Predictive maintenance uses condition monitoring — Dissolved Gas Analysis (DGA), partial discharge, temperature, vibration — to detect faults before failure. It cuts unplanned downtime 30-50% and maintenance cost 10-25% versus reactive maintenance. The calculator compares manual vs condition-monitoring O&M costs.
What is the ROI of smart O&M monitoring?
Smart O&M typically pays back in 1-3 years, driven by avoided downtime (a Transformer failure can cost $50,000-500,000 in outage and replacement) and lower labor. The calculator estimates downtime savings, ROI and payback conservatively for a power-equipment fleet.
What condition monitoring parameters matter most for transformers?
For oil-immersed transformers, dissolved gas analysis (DGA) per IEC 60599 detects incipient faults; oil temperature, moisture and partial discharge round out the picture. For dry-type, temperature and partial discharge dominate. The calculator models a monitoring program covering these parameters.
How much does unplanned downtime actually cost?
Unplanned downtime cost = lost production plus repair and possible penalties. For a process plant a single day can cost $10,000-500,000 depending on the facility. Predictive maintenance targets a 30-50% reduction in such events. The calculator uses your downtime cost and frequency to estimate savings.
What is the difference between preventive and predictive maintenance?
Preventive maintenance services equipment on a fixed schedule regardless of condition, often wasting effort. Predictive maintenance acts only when condition data shows degradation, targeting interventions and cutting cost. Predictive is the higher-ROI strategy for fleets. The calculator models the cost shift from scheduled to condition-based.
Sematkan kalkulator ini
Salin kode iframe di bawah untuk menyematkan kalkulator ini di situs mana pun. Halaman sematan bersifat noindex dan menyesuaikan lebar apa pun.
Hasil adalah estimasi teknik untuk referensi. Desain akhir harus dikonfirmasi oleh insinyur lokal berlisensi terhadap kondisi lokasi dan kode yang berlaku. Harga adalah FOB Qingdao (EXW) dan tidak termasuk pengiriman, bea masuk, atau instalasi.
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