变电站 IEC 62271-200

中压开关设备选型 (IEC 62271)

AC金属封闭开关设备选型 — Ur 3.6~40.5 kV。面板代码、绝缘水平、海拔/温度降额、IAC分类、母线配置。

⚡ Short-Circuit 🔬 Relay Coordination 🔲 Busbar Rating

IEC 62271-200 IEC 62271-1 IEC 62271-100 IEC 60909 IEC 60664-1 IEC 60865-1

额定电压 Ur (kV)

频率 (Hz)

额定电流 Ir (A)

Reliability

额定短路电流 Ik (kA)

Rated Duration tk (s)

R/X Ratio

IAC Classification

LSC Category

Partition Class

Installation

Altitude (m)

Environment

Max Temperature (°C)

cos(φ) for Ek

Panel Type Code

Insulation Level (Table 1)

Parameter	Value
Up (impulse kV)	—
Ud (power-freq kV)	—
Ur (kV)	—

Derating Factors

Ka (altitude) —

K_temp —

Ir derated (A) —

κ factor —

Ip auto (kA) —

K_temp is indicative — verify with manufacturer curves

Internal Arc Energy

—

MJ equivalent

IAC Classification —

cos(φ_arc) —

Bay Configuration

— —

—

Insulation Technology

—

Scores

开关设备比较

Standards Compliance

Export

Panel Type Code Construction ▸

Code follows IEC 62271-200 §3 nomenclature.

              [type] [Ur] / [Ir] / [Ik-tk] [/ LSC] [- partition] [/ IAC]
            

              AIS 12kV / 1250A / 25kA-1s / LSC2B-PM / IAC AFLR 25kA 1s
            

Insulation Levels (Table 1) ▸

Up = rated impulse, Ud = power-frequency withstand. Ka correction for altitude.

              Ud_corrected = Ud / Ka  (H > 1000 m)
            

Altitude & Temperature Derating ▸

Ka = e^((H-1000)/8150). K_temp ≈ 1 - 0.012 × (T_max - 40°C).

              Ir_final = Ir × Ka × K_temp
            

Internal Arc Classification ▸

Ek = √3 × Ur × Ik × t × cos(φ_arc). AFLR = all four faces arc-resistant.

              Ek = √3 · Ur · Ik · t · cos(φ_arc)  (cos≈0.7 per IEC 60865-1)
            

Bay Configuration Selection ▸

LSC1 → single busbar. LSC2A/2B + high → double busbar. LSC2B + standard → single with bypass.

FAQ