1.5MW 医院供电系统（2026年第三季度中国供应商价格）
1.5 MW Hospital Power System Cost Breakdown (Q3 2026 China Supplier Pricing) — itemized bill of materials and FOB pricing for a typical configuration.
Estimated total (FOB): $310,667 · 1600 kVA transformer
Bill of materials
| Item | Specification | Qty | Price (USD) |
|---|---|---|---|
| HV incoming panel (KYN28A-12-630-315) | 630 A / 31.5 kA · vacuum | 2 | $4,896 |
| HV bus-tie panel (KYN28A-12-630-315) | 630 A / 31.5 kA · vacuum | 1 | $2,448 |
| Main transformer (each) (SCB13-1600/10) | 1600 kVA · Dry-Type · Copper · SCB13 | 2 | $53,534 |
| LV incoming panel (GGD-2500) | 2500 A busbar · In 2309 A | 2 | $12,310 |
| LV bus-tie panel (GGD-2500) | 2500 A busbar | 1 | $6,155 |
| LV feeder panel (×3) (GGD-2500) | distributes 13 circuits | 3 | $18,464 |
| Cable branch box (LV) (DFW-0.4) | 1-in / 4-out · 0.4 kV · 630 A | 3 | $1,890 |
| Main feeder cable (TX→LV) (YJV 0.6/1kV 300 mm² ×5) | 5× 300 mm² Cu · ΔU 0.90% @ 60 m · $154.0/m | 5 | $46,200 |
| Feeder cable — Ward 1 (×13) (YJV 70 mm²) | 70 mm² Cu · 175 A · ΔU 1.5% · $37.0/m | 13 | $28,860 |
| Branch trunk cable (LV → branch box 1) (YJV 185 mm² ×2) | 2× 185 mm² Cu · 701 A · ΔU 1.1% · $103.0/m | 2 | $12,360 |
| Branch trunk cable (LV → branch box 2) (YJV 185 mm² ×2) | 2× 185 mm² Cu · 701 A · ΔU 1.1% · $103.0/m | 2 | $12,360 |
| Branch trunk cable (LV → branch box 3) (YJV 70 mm²) | 70 mm² Cu · 175 A · ΔU 1.5% · $37.0/m | 1 | $2,220 |
| Main busbar (Cu) (Cu 125×10) | 125×10 · 2500 A rating · ref $147.8/m | included | POA |
| Grounding electrode (Φ20mm × 2.5m rod) | R₁ 39.6 Ω → 13 rod(s) ≤ 4 Ω | 13 | $125 |
| Automatic transfer switch (ATS) (ATS 600 A (typ.)) | dual-source automatic transfer · GB 50052 load classification | 1 | $845 |
| Emergency power supply (EPS) (225 kW (typ.)) | emergency & fire lighting · GB 51309 | 1 | $13,000 |
| Diesel generator set (standby) (2000 kVA (typ.)) | standby power for life-safety & critical loads · GB 50016 | 1 | $95,000 |
| Medical IT isolated power supply (45 kVA) | operating theatre / ICU isolated power · IEC 60364-7-710 | 1 | POA |
| Operating-room UPS (online) (75 kVA) | online double-conversion · IEC 62040 · quoted per project | 1 | POA |
| Fire pump feeder (dedicated) (120 kW) | dedicated fire pump supply · GB 50016 | 1 | POA |
Single-line diagram
How it was calculated
- Hospital: total load 1,500 kW × design factor 1 = 1,500 kW (explicit coincidence factor — life-safety + 100% medical load, no reduction)
- Redundancy 2N → two independent power paths
- Emergency level: critical → ATS, EPS (fire lighting), standby diesel genset
- Loads: P=1,500 kW, PF 0.95, 13 circuits
- Demand: 1,500 × 0.9 = 1,350 kW
- PFC: Qc = 1,350 × (0.329 − 0.329) = 0 kVAR → 0 kVAR bank
- Transformer: S = 1,350 ÷ 0.95 = 1421.1 kVA → 1,600 kVA standard
- Loading: 1,421 ÷ 1,600 = 89% (good range)
- Voltage regulation: 89% × 6% × sinφ ≈ 1.7% at full load
- HV: In 92.4 A, Isc 28.9 kA → KYN28A-12-630-315
- LV: In 2309 A, Isc 36.5 kA (Xfmr Z 6% + system 0.3%) → GGD-2500, 3 feeder panel(s)
- Cable branch boxes: 3 × DFW-0.4 (1-in/4-out) for feeder grouping
成本敏感因素
- 设备 — 变压器/开关柜/逆变器是最大单项。
- 储能 — 电池是最大变量。
- 铜价与运费 — 铜价联动线缆与运费使到岸成本 ±5–10% 波动。
常见问题
医院供电需要什么冗余？
医院按 GB 50052 属一级重要负荷，需两路独立市电加应急电源（柴发或 EPS），数秒内恢复关键回路。生命维持和手术室用 2N + UPS。计算器按建筑类型、冗余等级（N+1/2N）与应急级别为整套供配电选型。
公共建筑的应急电源如何恢复？
双电源自动转换开关（ATS）检测失电后切到备用柴油发电机，柴发 30-60 秒启动并带满负荷。毫秒级关键负荷用 UPS 桥接。GB 50052 划分应急等级；计算器按建筑负荷类别选 ATS、柴发/EPS 与电池备电。
医院或体育场的典型负荷密度是多少？
医院约 60-120 W/m²（含影像可达 150 W/m²），学校 30-60 W/m²，办公 50-80 W/m²，体育场 60-100 W/m² 外加泛光照明峰值。计算器默认 1500 kW 模拟中型医院；总需量决定变压器与应急容量。
1500 kW 医院需要多大变压器？
1500 kW 医院、0.95 功率因数约需 1580 kVA，故 N+1/2N 选 2×800 kVA 或 2×1000 kVA。医院常设两台变压器带自动母联，任一都能带关键负荷。计算器按 IEC 60076 标准容量并套用所选冗余等级。
什么是 EPS？它和 UPS 有什么区别？
应急电源（EPS）是基于逆变器的照明和生命安全负荷备用电源，切换时间 0.25-5 s，比 UPS（0-10 ms）慢但每 kVA 更便宜，适合电机与照明负荷。UPS 用于不能容忍任何中断的电子设备。计算器为应急照明选 EPS、为关键 IT 选 UPS。
公共建筑适用哪些电能质量规定？
公共建筑须按 IEEE 519 限制谐波畸变（PCC 处 5-8% THD）并维持功率因数高于约 0.9 以免被罚款。LED 照明和变频暖通注入谐波，故常配去谐电容或 APF。计算器校核功率因数与谐波占比并配置补偿。