Why this FAQ?
This FAQ compiles the questions panel builders, OEMs, and maintenance teams most often ask us about the ABB UA16-30-10RA capacitor switching contactor (AC-6b). It’s designed to save you time during selection, commissioning, and support by putting the essentials in one place—coil ratings, utilization category, durability, mounting and wiring limits, protection guidance, and critical safety notes (e.g., use without additional inductances and discharge capacitors to ≤50 V before re-energizing). Where data is not available, we’ve clearly marked it as [Information Not Provided] so you can request the official datasheet or application note. Use this as a quick reference for RFQs, site checks, and panel documentation.
For pricing, stock, or technical confirmation, message Shansen Enterprises (ABB Authorized Channel Partner) on WhatsApp—we’ll help you size the right UA..RA device for your PFC stage.
What is the ABB UA16-30-10RA?
A 3-pole AC-6b capacitor switching contactor with 1 built-in NO auxiliary contact and factory-fitted damping resistors for PFC capacitor banks.
What is the coil voltage and frequency?
220–230 V AC at 50 Hz and 230–240 V AC at 60 Hz.
Is it suitable for use with series reactors or additional inductances?
No. UA..RA contactors must be used without additional inductances.
Do the damping resistors come included?
Yes. A special front block inserts three damping resistors for pre-charging and inrush limitation.
What safety step is required before re-energizing capacitors?
Ensure the capacitor residual voltage at terminals is ≤ 50 V before switching on.
How many poles and auxiliary contacts does it have?
3 main poles and 1 NO built-in auxiliary contact (no NC).
What are the utilization and standards?
Utilization category AC-6b for capacitor switching; compliant with IEC/EN 60947-1 and IEC/EN 60947-4-1.
What is the rated operational voltage (Ue)?
Main circuit up to 690 V AC; auxiliary circuit up to 690 V AC.
What are Ui and Uimp ratings?
Rated insulation voltage Ui up to 1000 V (IEC 60947-4-1) and impulse withstand voltage Uimp 8 kV.
What is the thermal current (Ith)?
16 A at θ = 40 °C per IEC 60947-5-1.
What are the AC-6b kvar ratings?
230/240 V: 8 kvar (40 °C), 7.5 kvar (55 °C), 6 kvar (70 °C).
400/415 V: 12.5 kvar (40 °C & 55 °C), 10 kvar (70 °C).
440 V: 15 kvar (40 °C), 13 kvar (55 °C), 11 kvar (70 °C).
500/550 V: 18 kvar (40 °C).
What are the AC-15 rated operational currents (aux contact)?
Approx.: 6 A at 24/127 V, 4 A at 220/240 V, 3 A at 380/400 V, 2 A at 500 V, 2 A at 690 V.
What are the DC-13 rated operational currents (aux contact)?
6 A/144 W at 24 V; 2.8 A/134 W at 48 V; 2 A/144 W at 72 V; 1.1 A/121 W at 110 V; 1.1 A/138 W at 125 V; 0.55 A/121 W at 220 V; 0.55 A/138 W at 250 V.
What are the electrical durability figures?
Up to 250,000 operating cycles for Ue ≤ 440 V and 100,000 cycles for 500–690 V.
What is the maximum electrical switching frequency?
Up to 240 cycles per hour.
What are the coil consumption values?
Pull-in: 70 VA at 50 Hz / 80 VA at 60 Hz. Holding: 8 VA at 50/60 Hz.
What are the operating times?
Energization to NO closing: 10–26 ms. De-energization to NO opening: 4–11 ms.
What short-circuit protection is recommended?
Main circuit: gG fuses 80 A. Auxiliary circuit: gG fuses 10 A.
What are the short-time withstand and breaking capacities?
Icw: 140 A for 0.1 s, 100 A for 1 s. Maximum breaking capacity: 250 A at 440 V (cos φ 0.45) and 90 A at 690 V (cos φ 0.45).
How is it mounted?
On DIN rail TH35-15/TH35-7.5 (IEC 60715) or by two M4 screws placed diagonally.
What is the terminal type, torque, and wiring capacity?
Screw terminals (main M3.5). Tightening torque: 1 N·m for main, control, and auxiliary circuits. Main: flexible 1×0.75–2.5 mm²; rigid 1×1–4 mm². Auxiliary: flexible 1/2×0.75–2.5 mm²; rigid 1/2×1–4 mm².
What is the degree of protection?
IP20 for main, coil, and auxiliary terminals.
What are the dimensions and weight?
44 mm (W) × 107 mm (D) × 120 mm (H); approximately 0.46 kg.
What are the product identifiers?
Model: UA16-30-10RA. Product ID: 1SBL181024R8010. EAN: 3471522300805.
Where is it manufactured?
Made in India.
What accessories are available?
A wide range of ABB accessories is available for the UA series; specifics vary by application.
Are operating temperature, approvals, warranty, or datasheet links available?
Please verify with the supplier before procurement.
Where can I get pricing and support?
Contact Shansen Enterprises on WhatsApp for a quick quote, stock check, and technical guidance.
