ABB A185-30-11-80 AC Contactor

رقم الطلب: 1SFL491001R8011｜Status: Legacy A series discontinued, direct replacement AX185-30-11-80 (1SFL491074R8011)

التطبيقات النموذجية: 3-phase motor starting, bypass circuits, توزيع الطاقة, HVAC water pumps, المشجعين, ضواغط الهواء, capacitor switching (ايه سي-1). Compliant with IEC/GB14048.4

✅ Model Breakdown

A185: حجم الإطار, rated 185A at AC-3, 415V

30: 3 عادة open main contacts, no main normally closed contacts

11: Built-in auxiliary contacts 1NO+1NC

80: Coil code → AC220-230V 50Hz / AC230-240V 60Hz

📌 Core Electrical Specifications

البولنديين: 3ص

Max main circuit voltage: 690V

التيار الحراري التقليدي Ith (40℃ free air): 275أ

ايه سي-3 (motor duty, 55درجه مئوية): 400/415V → 185A

ايه سي-1 (حمل مقاوم, 55درجه مئوية): 690V → 250A

Coil holding power: 35VA @50Hz; قوة الاندفاع: 550VA @50Hz

نطاق جهد التشغيل: 0.85~1.1×Uc

الحياة الميكانيكية: 5 مليون عملية; Electrical life AC-3: تقريبا. 1 مليون عملية

أقصى تردد التشغيل: 300 cycles/hour for AC-3; 3600 cycles/hour mechanical

🔌 Wiring Specifications (Main Circuit Copper Cable)

Single solid conductor: up to 120mm²

Auxiliary contact wiring: 0.75~2.5mm² (with crimp terminals)

🧩 Compatible Accessories (Interchangeable with AX185)

Thermal overload relay: TA200DU (for 185A range)

كتل الاتصال المساعدة: CAL18 (side mount), CA5 (front mount)

مثبطات الطفرة: RC snubber, مكثف

التعشيق الميكانيكي, busbar connectors, terminal shrouds

🔁 Replacement Information (الملاحظات الرئيسية)

Discontinued legacy model: A185-30-11-80

Fully compatible replacement: AX185-30-11-80, identical mounting dimensions, cutout and wiring, upgraded performance and readily available stock

Coil code cross reference: 81=24 فولت, 83=48V, 84=110V, 85=380V, 80=220/230V

📎 HS Code

HS code: 85364900 (electromagnetic contactor, >32أ)

⚠️ الاختيار & نصائح الصيانة

For heavy-duty motors, reversing or frequent start-stop applications, select next higher frame size or AF series (AC/DC wide-voltage coil);
Derating is required for ambient temperature＞55℃ or installation inside enclosed cabinets;
Verify coil voltage code during replacement; شفرة 80 is the most common AC220V coil for China market;
Prioritize AX new model for spare parts procurement, genuine brand-new A series stock is nearly unavailable.

ايه بي بي A185-30-11-80 Contactor Application Cases (ايه سي-3 400 فولت, suitable for 75kW 3-phase motor, لفائف AC220V, built-in 1NO+1NC auxiliary)

ملاحظة: A series is discontinued. AX185-30-11-80 shall be adopted for new projects. Mounting and wiring logic are identical for all cases below.

قضية 1: Heating Station Circulating Water Pump (DOL Direct-On-Line Starting)

حمولة: 75kW hot water circulating pump, 380V, for industrial/municipal heat exchange stations, primary chilled water pumps of large commercial HVAC systems

إعدادات: A185-30-11-80 + TA200DU thermal relay (setting range 140~200A) + moulded case circuit breaker for protection

منطق التحكم: بلك / local pushbutton start-stop; built-in 1NO for run feedback, 1NC for interlock

سمات: Continuous stable operation; AC-1 resistive rating 250A ideal for steady pump loads; auxiliary contacts send status signals to BMS building management system

مذكرة المخاطر: Derating and cabinet cooling fan required in summer for enclosed cabinets; avoid frequent cycling

قضية 2: Variable Frequency Multi-Pump Cabinet, Mains Bypass Contactor

حمولة: 75kW main water supply pump for constant-pressure water supply, VFD + mains dual circuit

مخطط: Contactor at VFD output + A185 mains bypass contactor, mechanical interlock accessory fitted between two contactors

منطق: Pump runs via VFD under normal condition; upon VFD fault, PLC opens VFD circuit and closes A185 bypass to run motor directly on mains for uninterrupted water supply

Critical requirement: كهربائي + mechanical interlock mandatory to prevent catastrophic parallel connection of VFD output and mains; 1NO/1NC for bypass status feedback and interlock signals

الصناعات: Water treatment plants, sewage plants, high-rise secondary water supply, park water supply

قضية 3: Soft Starter Bypass for Screw Air Compressor Main Motor (متطابقة مع ABB PSTX soft starter)

حمولة: 75kW screw air compressor main motor

مخطط: ABB PSTX soft starter + A185-30-11-80 bypass contactor

عملية: After soft start completes and current drops, PLC energizes A185 to short-circuit the soft starter; motor runs continuously via bypass contactor to reduce heat loss on soft starter thyristors

ميزة: Air compressor is heavy inductive load; bypass configuration greatly extends soft starter service life. 5 million mechanical cycles suit compressor stations with multiple daily starts

مُكَمِّلات: CAL18 side-mounted auxiliary contact expansion, RC surge suppressor to absorb coil back EMF

قضية 4: Dust Removal Fan / Induced Draft Fan Control (Boiler & Dust Treatment)

حمولة: 75kW centrifugal induced draft fan, main baghouse dust fan, for cement plants, chemical plants, waste incineration facilities

يتحكم: DCS remote start-stop, interlocked with differential pressure, temperature and vibration signals; A185 switches main circuit, thermal relay for overload protection

Operating characteristics: الجمود العالي, long start duration; not suitable for frequent jogging; usually DOL start or soft start + bypass

Selection note: AF wide-voltage AC/DC series is preferred if frequent forward/reverse operation is required

قضية 5: Main Contactor for Star-Delta Reduced-Voltage Starting (KM Main)

حمولة: 75kW high-power motor, star-delta starter cabinet

Cabinet combination: 1 A185 as main contactor KM1 + 2 smaller contactors for star and delta switching

Suitable for sites with limited grid capacity and strict inrush current limits; auxiliary contacts send start-phase and completion feedback to PLC

حذر: Transient impulse current occurs during star-delta transition, accelerating contact wear compared with standard DOL; regular inspection of contact erosion required

قضية 6: Capacitor Bank Switching in Low-Voltage Reactive Power Compensation Cabinet (تحميل مقاوم AC-1)

حمولة: Low-voltage power factor correction capacitor bank, total 3-phase capacitor current ≤250A (A185 AC-1 rating 250A)

ملاحظة: Capacitor switching belongs to AC-1 resistive duty with high switching inrush current; standard A185 is only suitable for slow, infrequent switching. ABB dedicated UA capacitor contactors are recommended for high-frequency switching

طلب: Factory power rooms, commercial power distribution boards, low switching frequency (≤10 times per day)

قضية 7: Heavy-Duty Belt Conveyor Drive (التعدين / Sand & Aggregate / مواد البناء)

حمولة: 75kW main drive motor for sand transport, mining feed conveyor

حالة التشغيل: Heavy start torque, risk of stall; A185 + TA200DU thermal relay + stall interlock

القيد: A series has poor AC-4 performance for frequent reversing and jogging; AF series upgrade is recommended

✅ General Selection & Site Reminders

Coil code 80 = AC220V, most widely used in domestic control cabinets; AF wide-voltage coil is recommended for sites with large voltage fluctuation
Built-in 1NO+1NC satisfies standard feedback; add CAL18 side auxiliary blocks if more signal points are needed
Replacement note: A series discontinued; AX185-30-11-80 is direct replacement with identical cutout, wiring and accessories
Protection matching: MCCB for short-circuit protection + TA200DU thermal relay for overload protection

Operating Principle of ABB A185-30-11-80 AC Contactor

This is an electromagnetic AC contactor. Its core function is using electromagnetic force to drive mechanical linkage to switch main and auxiliary contacts. Coil code 80 means AC220V coil, اتصالات مساعدة مدمجة 1NO+1NC, 3-pole main contacts for 3-phase motors, مضخات, fans and other loads.

ملاحظة: A series discontinued; AX185 shares identical working principle.

المكونات الداخلية الرئيسية
Electromagnetic coil (excitation coil): Control circuit component, energized by AC220V to generate alternating magnetic field
نواة ثابتة, moving core (armature): Magnetic circuit. Fixed core is stationary; moving core couples with contact carrier. A shading ring is embedded on the end face of fixed core, unique to AC contactors.
جهات الاتصال الرئيسية (3 pairs of normally open main contacts): Carry high current to switch 380V main loads (المحركات, pumps etc.)
اتصالات مساعدة (built-in 1NO+1NC): Low-current signal contacts for latching, التعشيق, run feedback, PLC/DCS signalling
Return spring: Pushes moving core back and opens contacts when coil is de-energized
شلال القوس: Elongates and cools electric arc during contact separation, extinguishes arc to prevent contact melting and phase-to-phase short circuit
Complete Working Sequence

2.1 يتم تنشيط الملف (pull-in stage)

AC220V rated voltage applied to control coil → alternating magnetic field generated, fixed core magnetized and electromagnetic attraction produced.

Attraction overcomes the force of return spring and contact pressure springs, pulling moving core down to close.

Linked mechanism operates synchronously:

3 pairs of main NO contacts close, 3-phase main circuit energized, motor/load starts running

Auxiliary contacts switch simultaneously: NO closes, يفتح NC

The 1NO can be used for self-latching or sending run status to PLC; the 1NC is used for interlock and fault feedback.

✅ Shading ring function: AC magnetic field crosses zero every half cycle, causing temporary loss of attraction. Eddy current induced in shading ring creates a lagging magnetic field to maintain suction and eliminate hum and chatter of the core.

2.2 Coil continuously energized (holding stage)

Core stays closed, main circuit remains conductive.

Coil consumes low holding power (much lower than pull-in inrush power). Contact springs maintain adequate contact pressure to reduce contact resistance and avoid overheating under high current.

2.3 تم إلغاء تنشيط الملف (يطلق & breaking stage)

Control circuit de-energized → magnetic field disappears, electromagnetic attraction vanishes.

Return spring rebounds and resets moving core:

3 جهات الاتصال الرئيسية مفتوحة, main power supply disconnected

إعادة ضبط جهات الاتصال المساعدة: لا يفتح, NC closes

Arc forms at contact separation, cut and cooled by arc chute for arc extinction. Switching cycle completed.

Auxiliary Contact Logic (Key Point)

A185-30-11-80 built-in 1NO+1NC:

تم إلغاء تنشيط الملف: NO open, NC closed

يتم تنشيط الملف: NO closed, NC open

They operate synchronously via mechanical linkage and are not independently controlled.

Key Performance & ملاحظات التطبيق
It is a control switch: It does NOT provide short-circuit protection. It only performs remote electric switching. Upstream circuit breaker for short-circuit protection and thermal relay for overload protection are mandatory.
ايه سي-3 (motor duty) characteristic: Make motor starting inrush current, break rated running current. Not suitable for frequent breaking of locked-rotor current (AC-4 duty). Frequent reversing and jogging accelerate contact wear.
Arc quenching principle: Grid-type arc chute splits long arc into multiple short arcs, cooled by air for rapid extinction, suitable for inductive loads up to 690V.
Operating voltage window: 0.85~1.1×Uc. Low voltage causes insufficient suction, contact chatter and arcing damage.
Simple Control Example (Self-Latching Circuit)

Press start button → coil energized, contactor pulls in, built-in NO auxiliary contact closes and parallels across start button. When start button is released, coil remains energized via this NO contact (self-latching). Press stop button, coil de-energized and contactor drops out.

المفاهيم الخاطئة الشائعة

AC contactor cannot provide electrical isolation for maintenance. Upstream circuit breaker must be opened for service work.

Shading rings are only fitted on AC magnetic cores; DC contactors do not have shading rings.

Main contacts and auxiliary contacts are mechanically linked but electrically isolated. High main circuit current will not leak into low-voltage control signal circuits.

قاعدة ترميز النموذج (A185-30-11-80)

AXX-30-XX-XX

AXX: تصنيف الإطار الحالي (A9～A300)
30: 3 عادة فتح جهات الاتصال الرئيسية (3لا + 0NC, standard for 3-phase motors)
Auxiliary contact definition:

00: No built-in auxiliary contacts

11: 1لا + 1NC (standard for this model)

22: 2لا + 2NC

Coil code (last two digits)

شفرة	الجهد لفائف
81	تيار متردد 24 فولت
83	تيار متردد 48 فولت
84	تيار متردد 110 فولت
80	تيار متردد 220 فولت (widely used in China)
85	تيار متردد 380 فولت

ملاحظة: A series discontinued; AX series with identical suffix is direct replacement with same mounting cutout and wiring.

Full 3-Pole Model List (30 main contact version, الدوائر الحركية)

Low current range (A9～A75)

A9, A12, A16, A26, A30, A45, A50, A75

Standard suffix: -30-10 / -30-11

Typical full part numbers:

A9-30-10-80, A26-30-11-80, A75-30-11-80

واسطة & high power range (A95～A300, including A185)

Main models for pumps, المشجعين, air compressors and star-delta starters:

A95, A110, A145, A185, A210, A260, A300

Auxiliary options for each frame (3-القطب 30 إصدار)