ABB UA50-30-00RA Capacitor Switching Contactor

Meet the ABB UA50-30-00RA — a robust 3-pole capacitor-switching (AC-6b) contactor with an AC coil (220–230 V 50 Hz / 230–240 V 60 Hz). Supplied with factory-fitted damping resistors, it’s built to tame inrush peaks and extend capacitor bank life while keeping your power factor correction panel reliable and easy to service.

Key Features at a Glance

• 3 main poles (NO); 0 NC; 0 auxiliary contacts

• Purpose-built for capacitor switching (AC-6b) — use without additional inductances

• Integrated front block with 3 damping resistors for inrush limitation & capacitor pre-charge

• Capacitors must be discharged to ≤ 50 V before re-energizing

• Electrical durability: 250,000 ops (Ue < 500 V); 100,000 ops (500–690 V)

• Rated operational voltage (main): 690 V; Frequency: 50/60 Hz

• Rated insulation voltage Ui: 1000 V (IEC 60947-4-1); 600 V (UL/CSA)

• Impulse withstand Uimp: 8 kV

• Short-circuit protection: gG fuses 200 A

• Max breaking capacity: 1300 A @ 440 V (cos φ 0.45 / 0.35 for Ie > 100 A); 630 A @ 690 V

• Coil (AC): 220–230 V 50 Hz / 230–240 V 60 Hz; Pull-in 180 VA (50 Hz) / 210 VA (60 Hz); Holding 18 VA

• Operate times: 8…27 ms (close); 4…11 ms (open)

• Max electrical switching frequency: 240 cycles/hour

• Mounting: DIN rail TH35-15 / TH75-25 (IEC 60715) or 2×M6 screws (diagonal)

• Terminals: Main M6 Pozidriv (open-delivered); Aux/Coil per spec

• Degrees of protection: Coil IP20; Main terminals IP10

• Compact & sturdy: 70 × 140.4 × 150 mm (W×D×H), 1.35 kg

• Standards: IEC/EN 60947-1, IEC/EN 60947-4-1

• Accessories: Wide range available

Why Choose This Product

UA..RA series contactors are ABB’s proven answer to capacitor inrush. The UA50-30-00RA arrives complete with a pre-insertion resistor block that both pre-charges the capacitors and damps the initial surge — reducing stress on components, avoiding nuisance trips, and improving system longevity. It’s a clean, panel-friendly solution backed by ABB quality and broad accessory support.

Ideal For

• Power Factor Correction (PFC) panels and capacitor banks

• OEM switchboards and LV distribution panels

• Industrial plants with frequent capacitor switching

• Utilities and commercial facilities optimizing reactive power

• Retrofit or service upgrades where inrush mitigation is critical

WhatsApp Quote

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