Siemens 3RV2031-4KA10 Motor Protection Circuit Breaker

نوع المنتج: SIRIUS 3RV2 series frame S2 قاطع دائرة حماية المحرك (حامي المحرك), active production model, made in Germany

1. شرح كود النموذج

3RV 2 0 31 4 K A 10

3RV: SIRIUS motor protection circuit breaker

2: 2nd generation of 3RV2 series

0: الإصدار القياسي, no pre-fitted auxiliary contacts

31: Frame size S2

4: Trip current rating code

ك: Thermal setting range 62~73A

أ: محطات المسمار

10: Standard breaking capacity (without additional contacts)

2. Core Technical Data

3. وظائف الحماية
4. حماية الزائد: Inverse-time thermal trip via bimetallic strip, motor overload protection and phase loss protection
5. حماية ماس كهربائى: Instantaneous electromagnetic trip for rapid short-circuit disconnection
6. Front-mounted TEST pushbutton for manual tripping test of the mechanism
7. Handle position indication: على / عن / fault trip position; padlockable for lockout
8. الأسلاك & مواصفات التثبيت

Main circuit conductor: الأعلى. 1×35mm² solid/stranded cable; الأعلى. 1×25mm² fine-stranded cable with ferrule

Tightening torque for main terminals: 3.0~4.5 N·m, M6 screws

Accepts top-in or bottom-in wiring; DIN35mm rail mounting

Can be assembled with SIRIUS 3RT contactor to form a direct-on-line starter, constituting a motor protection starter unit

5. اختيار & معلومات الاستبدال

Same-series Replacement (Same Rating)

3RV2031-4KA15: Version with pre-fitted auxiliary contacts (1لا + 1NC)

ملحوظة: 3RV2031-4KA10 has no built-in auxiliary contacts. For feedback signals, 3RV2901 auxiliary contact accessory must be mounted externally.

Domestic Alternative Reference

سيمنز local China 3RV5/3RV6 series equivalent: 3RV5031-4KA10 (domestic frame S2, 62~73A, محطات المسمار, largely identical parameters)

6. التطبيقات النموذجية

3-phase asynchronous motors, المشجعين, مضخات المياه, الضواغط, conveyor motor circuit protection

Motor starter circuits inside control cabinets, combined with contactors as starter assemblies

Motor protection for machine tools, التدفئة والتهوية وتكييف الهواء, التعبئة والتغليف, chemical automation equipment

7. دليل استكشاف الأخطاء وإصلاحها
8. Trips immediately upon motor start: Usually short-circuit trip. Check motor windings and cables for phase-to-phase or earth short circuit.
9. Trips after running for some time: الزائد. Recheck motor rated current and reset the adjustment knob; فحص التشويش الميكانيكي.
10. لا يمكن إغلاقه: خطأ الآلية, or previous short-circuit trip not fully reset. Press TEST button to reset before closing.
11. Second-hand Inspection Checklist
12. مظهر: No cracked housing, burn marks, or overheating discoloration on terminals
13. عملية ميكانيكية: Smooth handle operation; TEST button triggers trip correctly and resets properly
14. الاستمرارية: Main contacts conduct when closed and isolate when open; no internal short circuit
15. العزل: Measure insulation resistance between phases and to earth using a megger

Siemens 3RV2031-4KA10 (Frame S2) أبعاد التثبيت

All 3RV2031 models of frame S2 share identical outer dimensions

Unit Overall Dimensions (العرض × الارتفاع × العمق)

Width W: 55 مم (55mm cabinet space per unit)

Height H: 140 مم

Depth D: 149 مم (from rail mounting surface to front of operating handle)

طريقة التركيب

السكك الحديدية: DIN 35mm standard rail (DIN EN 60715), clip-on mounting; optional screw locking

اتجاه التركيب: any orientation (رَأسِيّ, horizontal installation allowed)

Cabinet Clearances (Heat dissipation / Electrical clearance)

التركيب جنبًا إلى جنب: 0mm gap allowed for adjacent units

Vertical clearance top & قاع: ≥50mm at upper/lower terminal zones

Clearance to earthed cabinet metalwork: ≥10mm lateral clearance

Cabinet cutout (if door extension handle is used)

The 3RV2 unit is DIN-rail mounted inside the cabinet. If an extended door operating handle (تباع بشكل منفصل) مطلوب:

Cutout width: تقريبا. 48مم, cutout height: تقريبا. 130مم

ملحوظة: No cabinet cutout required without extension handle; unit is fully installed inside enclosure on DIN rail.

ملاحظات تكميلية

With 3RV2901 side-mounted auxiliary contact: overall width unchanged, slight increase in depth

When back-to-back assembled with 3RT contactor as starter: total depth equals sum of both components

Siemens 3RV2031-4KA10 Weight

✅ Net weight (unit only, no packaging): 1.17 كجم (manufacturer nominal 1.172 كجم; use 1.17kg on engineering drawings)

All S2 frame 3RV2031 models have similar weight, range 1.07~1.18 kg. Variations come from internal trip components; standard value for 3RV2031-4KA10 is 1.17 كجم.

ملاحظات تكميلية

1. باستثناء الملحقات: No 3RV2901 auxiliary contacts, door extension handles or other attachments. Weight increases slightly when accessories are fitted.
2. Gross weight with factory carton: تقريبا. 1.30 كجم (for logistics estimation)
3. Unit conversion: 1.17 kg ≈ 2.58 رطل

Siemens 3RV2031-4KA10｜Cross-brand Comparison + MPCB Product Series List

Reference device: 3RV2031-4KA10, frame S2, 55عرض ملم, 3ص, 62~73A, محطات المسمار, Class10, Icu@400V=65kA, no built-in auxiliary contacts, for 37kW@400V motor

⚠️ Important notice: No fully pin-to-pin drop-in replacement available. The below are function/rating/frame equivalent selections. Cabinet mounting, مُكَمِّلات, breaking capacity and instantaneous trip values must be verified. Protection coordination validation is mandatory before formal project replacement.

1. Siemens Internal Cross-reference (Preferred Replacement)

3RV2 frame size overview

S00: 45مم, max 16A, motor ≤7.5kW

S0: 45مم, max 40A, motor ≤18.5kW

S2: 55مم, max 80A, motor ≤37kW (frame of this model)

S3: 70مم, max 100A, motor ≤45~55kW

2. Imported Brand Equivalent Cross-reference (62~73A, S2 frame class MPCB)

3. Domestic Brand Alternatives (Cost Reduction for Projects)

4. MPCB Product Portfolio Overview by Brand (Thermal-Magnetic DIN Rail Motor Protection Circuit Breaker)

سيمنز

3RV2 (SIRIUS main import range: S00/S0/S2/S3, 0.1~100A)

3RV5 / 3RV6 (domestic economical range, S00/S0/S2)

3RV1 (legacy model, التخلص التدريجي)

3VU (old compact type, max 63A)

شنايدر

جي في 2: Small frame 45mm, 0.1~40A

GV3: Medium frame 55mm, 40~80A (counterpart to 3RV2 S2)

GV7: Large frame, 80~150A

ايه بي بي

MS116: Small frame

MS132: Medium frame, max 32A

MS165: 55mm frame up to 80A (counterpart to 3RV2 S2)

MO series (high breaking capacity version)

إيتون (مولر)

PKZ0 / PKZ1: Low current

PKZ2: S2 frame up to 80A

PKZ3: Large frame

Main Domestic Brands

Chint NS2

Delixi CDV6

Nader NDM2-M

Changshu CM1-M (motor protection variant)

5. Risks for Replacement Selection (Critical for Engineering)
6. Different instantaneous short-circuit trip (N factor): 3RV2031-4KA10 fixed at 949A. Schneider GV3 and ABB MS165 have different electromagnetic trip thresholds. Short-circuit protection coordination changes. Direct replacement may cause loss of selectivity.
7. Ultimate breaking capacity Icu: 3RV2 is 65kA@400V. Domestic models generally have lower Icu and shall NOT be used for circuits with high prospective short-circuit current.
8. التعشيق الميكانيكي & contactor assembly: 3RV2 can directly snap onto 3RT contactor to form starter. Cross-brand devices cannot mechanically clip together, separate mounting brackets required.
9. Auxiliary contact accessory systems are incompatible; mounting depth, terminal torque and maximum cable cross-section differ.
10. UL/CE certification: No arbitrary brand replacement for export machines.
11. Recommended Selection Rules

Cabinet retrofit, minimal modification: Siemens 3RV5031-4KA10 (domestic same-brand replacement)

Import brand substitution: Schneider GV3ME80 / ABB MS165-73, short-circuit protection coordination recheck required

Non-critical domestic circuit cost saving: Chint NS2-80 / Delixi CDV6-80