المقاولين,قاطع الدائرة,الاستشعار,التشفير,بلك,محول
NV = Earth Leakage Circuit Breaker (إلكب); NF = standard MCCB without earth leakage protection; 125 = Frame size AF125A; SV = Standard S model; 3P = 3-pole; 63A = rated operational current In=63A
✅ Core Electrical Specifications
| غرض | المعلمة |
| Full Model No. | NV125‑SV 3P 63A with adjustable earth leakage 100/200/500mA |
| Rated Voltage Ue | AC100~440V, suitable for 3-phase 3-wire / single-phase 2-wire circuits |
| التصنيف الحالي في | 63أ |
| البولنديين | 3ص (3 مراحل, neutral not switched) |
| Short-circuit Breaking Capacity Icu/Ics@AC400V | 30ال / 30ال |
| Earth Leakage Sensitivity | 3-مستوى قابل للتعديل: 100أماه / 200أماه / 500أماه |
| نوع التسرب | نوع التيار المتردد, surge resistant, anti-harmonic, suppresses nuisance tripping |
| وقت التشغيل | الأعلى. 0.04ق |
| البعد الشامل (العرض × الارتفاع × العمق) | 90mm × 130mm × 90mm |
| وزن | تقريبا. 1.1كجم |
📌 Model Code Breakdown
- NV: Earth Leakage Circuit Breaker (إلكب, moulded case type with leakage protection)
- 125: Frame rating 125A (frame size, this unit rated 63A)
- SV: Standard S type (New WS-V generation); CV = Economy type, HV = High breaking capacity type
- 3ص: 3-القطب, protects 3 live phases, neutral line does not pass through breaker
- 63أ: Continuous rated circuit current 63A
Common suffix: 1.2.500MA = 100/200/500mA adjustable earth leakage
🛠️ Application Scenarios
Industrial control panels, مضخات المياه, المشجعين, small 3-phase power circuits
Integrated protection for equipment: تسرب الأرض, الزائد & حماية ماس كهربائى
Suitable for harmonic-rich environments (VFD, محركات المؤازرة), less prone to nuisance tripping than older generations
تركيب اللوحة, standard screw terminals; الملحقات الاختيارية: Alarm switch AL, Auxiliary switch AX, رحلة تحويلة / Under-voltage coil
⚠️ Selection & ملاحظات الاستبدال
- Distinguish NV (ELCB with leakage) vs NF (standard MCCB without leakage). Similar appearance, NOT directly interchangeable.
- 3P version does NOT disconnect neutral conductor. Select 4P model NV125-SV 4P if neutral switching is required.
- Earth leakage threshold is preset at factory and adjustable via rotary knob on site; 100أماه للحماية الشخصية, 200/500mA for equipment fire protection.
- Domestic alternatives reference: CHNT NM1LE-125S/3P 63A, Delixi CDM1LE-125/3P 63A; verify breaking capacity and adjustable leakage range.
- Within the same frame size, current rating can be changed directly (63/75/80/100/125أ), mounting dimensions remain unchanged.
🧰 Troubleshooting Quick Reference
Trips immediately upon closing: Priority check for earth leakage or damaged load insulation; try higher leakage threshold.
Overload tripping: Continuous load current >63أ; inspect motor / cable loading.
تعثر ماس كهربائى: Severe short circuit; power off and inspect for phase-to-phase short circuit.
Leakage protection fails to operate: Press red TEST button periodically; verify leakage function monthly.
ميتسوبيشي NV125-SV (WS-V Series) Built-in Accessory List (الفأس / ال / SHT / UVT)
All accessories are clip-on built-in modules, field mountable; compatible for NV125-SV / NF125-SV same frame; accessories installed in the right-side compartment of breaker.
- AX Auxiliary Switch
نموذج: الفأس-03SVU
وظيفة: Reports ON/OFF status of main contacts, cannot distinguish manual opening or fault tripping
تصنيف الاتصال: 1a1b (1NO +1NC)
طلب: Send breaker position signal to PLC / مصابيح المؤشر
الأسلاك: Lead wire type; SLT version available with terminal block
- AL Alarm Switch
نموذج: ال-03SVU
وظيفة: Activates ONLY when tripped by fault (الزائد, ماس كهربائى, تسرب الأرض); no action during manual opening
تصنيف الاتصال: 1a1b
طلب: Fault trip alarm, SCADA signal upload, مسموع & visual alarm
Combined module: ALAX-03SVU = integrated AX+AL module (provides both position feedback and fault trip signal, الأكثر استخداما على نطاق واسع)
- SHT Shunt Trip
Voltage variants:
SHTA240-03SVU: AC100～240V AC shunt trip
SHTA440-03SVU: AC200～440V AC shunt trip
SHTD100-03SVU: DC24V DC shunt trip
لاحقة U: built-in module; L = extended lead; S = special spec
وظيفة: Remote electrical trip via control signal; used for emergency stop, fire linkage circuit cut-off
Important note: Short-time energized type, continuous power supply is prohibited.
- UVT Under Voltage Trip
Two types:
UVTN-03SVU Non-synchronous UVT: Instant trip upon voltage drop
UVTS-03SVU Synchronous UVT: Trip at voltage zero-crossing during voltage drop, for large inductive loads to reduce breaking surge
Voltage ratings: AC100/200/240/400V optional
وظيفة: Automatic trip when main circuit voltage drops or power loss; will NOT auto-reclose after voltage recovery, manual closing required on site.
External Accessories for NV125-SV
| نموذج التبعي | اسم | وصف |
| TC‑1SV | غطاء المحطة | Insulation protection for exposed terminals |
| LC‑1SV | Padlock device | Handle lockout, prevent accidental closing |
| MI‑05SV3 | التعشيق الميكانيكي | Mechanical interlock for 2 قواطع الدائرة (dual power switching) |
| HLF‑1SV | External rotary handle | Panel mounted operating handle, with door interlock |
⚠️ Selection & Installation Restrictions (شديد الأهمية)
- One NV125-SV breaker can be fitted with max. one built-in accessory module only. SHT + ALAX cannot be installed together.
الخيار أ: ALAX (موضع + fault signal)
الخيار ب: SHT (remote tripping)
الخيار ج: UVT (under-voltage protection)
- Built-in accessories occupy space on the right side of breaker. Do not mount breakers side-by-side with zero clearance when fitted with internal accessories (UVT needs extra space).
- Two ordering options:
Breaker pre-fitted with accessories at factory (complete unit order)
Purchase accessory modules separately and assemble on site
- ELCB NV125-SV supports SHT/UVT installation for fire linkage and loss-of-voltage protection; accessories are interchangeable with NF125-SV standard MCCB.
Ordering Examples
NV125-SV 3P 63A + ALAX-03SVU (with switch position & fault alarm contacts)
NV125-SV 3P 63A + SHTA240-03SVU (AC220V remote shunt trip)
Full Model List of Mitsubishi NV125-SV (WS-V ELCB)
Frame AF125, Icu=30kA / Ics=30kA @AC400V; Standard AC type leakage 100/200/500mA adjustable; 3P /4P; رحلة حرارية مغناطيسية; dimension W90×H130×D90mm
Naming format: NV125-SV [3ف/4ف] [Rated Current A]
✅ Rated Current Range (في)
16أ, 20أ, 25أ, 32أ, 40أ, 50أ, 63أ, 75أ, 80أ, 100أ, 125أ
✅ Full Model Matrix
3ص (3-مرحلة, neutral not switched)
NV125-SV 3P 16A
NV125-SV 3P 20A
NV125-SV 3P 25A
NV125-SV 3P 32A
NV125-SV 3P 40A
NV125-SV 3P 50A
NV125-SV 3P 63A (target model)
NV125-SV 3P 75A
NV125-SV 3P 80A
NV125-SV 3P 100A
NV125-SV 3P 125A
4ص (3-مرحلة + القطب المحايد, neutral can be disconnected)
NV125-SV 4P 16A
NV125-SV 4P 20A
NV125-SV 4P 25A
NV125-SV 4P 32A
NV125-SV 4P 40A
NV125-SV 4P 50A
NV125-SV 4P 63A
NV125-SV 4P 75A
NV125-SV 4P 80A
NV125-SV 4P 100A
NV125-SV 4P 125A
Derived variants on same WS-V platform
NV125-CV: Economy version, Icu=10kA @AC400V
NV125-HV: قدرة كسر عالية, Icu=50kA @AC400V
NV125-SEV/HEV: Electronic trip ELCB (electronic protection, long/short time delay available)
شرح اللاحقة: 1.2.500MA = 100/200/500mA adjustable leakage (standard for China market); 30mA high-speed leakage variant available for personal protection.
Cross-brand Equivalent Reference (Reference target: NV125-SV 3P 63A, تيار متردد 400 فولت, Icu≥30kA, adjustable leakage 100/200/500mA, الحرارية المغناطيسية)
⚠️ملاحظة هامة: Physical size and accessories are NOT interchangeable; only electrical equivalent. Verify cabinet cutout, wiring and accessory interface for site retrofit. Table based on 63A/3P.
| ماركة | النموذج المعادل | المعلمات الرئيسية | ملاحظات |
| Mitsubishi Original | NV125-SV 3P 63A | 3ص 63 أ, Icu=30kA@400V, AC leakage 100/200/500mA adjustable, رحلة حرارية مغناطيسية | Reference unit, WS-V series |
| شنايدر | EZD125E 3P 63A Vigi (leakage module) | 3ص 63 أ, Icu=30kA, adjustable residual current | EZD125E + separate Vigi module; split type leakage, not integrated ELCB; بعدا مختلفا |
| شنايدر | NSX100N 3P 63A Vigi | وحدة العناية المركزة = 36 كيلو أمبير, adjustable leakage | NSX higher performance, سعر أعلى, modular leakage |
| ايه بي بي | T2N160 3P 63A RCD | وحدة العناية المركزة = 36 كيلو أمبير, adjustable AC residual current | MCCB body + external RCD module, integrated solution Tmax T2N |
| سيمنز | 3VT8106-1AA03-0AA0 + leakage trip module | 3ص 63 أ, Icu=25kA, optional leakage module | Breaking capacity slightly lower than Mitsubishi; check short-circuit capacity |
| مرتب | NM1LE-125S/3P 63A | 3ص 63 أ, Icu=35kA, leakage 100/200/500mA adjustable | Main domestic alternative, integrated ELCB, الحرارية المغناطيسية, similar mounting size |
| لذيذ | CDM1LE-125/3P 63A | 3ص 63 أ, Icu=35kA, multi-level adjustable leakage | البديل المحلي, 125AF frame, integrated leakage |
| كهرباء الناس | RMM1LE-125/3P 63A | 3ص 63 أ, Icu=35kA, adjustable leakage | بديل محلي اقتصادي |
Key Differences for Replacement Engineering
- Leakage construction: Mitsubishi NV125-SV is integrated built-in leakage. Schneider NSX/EZD and ABB Tmax mostly adopt separate external leakage modules, more failure points.
- كسر القدرة: NV125-SV Icu=30kA; Icu cannot be downgraded during replacement, risk of breaker failure under bus short-circuit.
- توافق الملحقات: Mitsubishi AX/AL/SHT/UVT are right-side clip-on modules; Schneider/ABB accessories are independent modules. Mitsubishi old accessories cannot be reused, new accessories must be purchased for retrofit.
- اختيار القطب: 3P only switches 3 live conductors, neutral passes through. Select 4P if neutral protection is required.
- Leakage type: Above are all AC type, suitable for standard power frequency loads. For VFD-heavy systems, A/F type leakage is recommended.
Mitsubishi Legacy to WS-V Upgrade
Old NV125-SW / NV125-SVL (old WS series) → NV125-SV (WS-V)
Same outer dimension, mounting hole compatible
Higher short-circuit breaking capacity (old 25kA upgraded to 30kA)
Updated accessory model: old SW accessories incompatible with SV; must use -03SVU series (الفأس-03SVU / ال-03SVU)
Recommended Replacement Priority
- Cabinet space & accessory reuse preferred: Original Mitsubishi NV125-SV
- Import equivalent upgrade: ABB T2N160 / Schneider NSX100N Vigi
- Cost-effective domestic engineering replacement: CHNT NM1LE-125S / Delixi CDM1LE-125
NV125-SV 3P 63A Replacement Retrofit Risk Checklist
Scope: Replace Mitsubishi NV125-SV 3P 63A (إلكب, تيار متردد 400 فولت, Icu=30kA, 100/200/500mA adjustable leakage) with identical model, imported equivalent (ABB/Schneider/Siemens) or domestic alternative (CHNT/Delixi/People). Used for ECN, technical briefing, incoming inspection and pre-commissioning check. ✅=Pass; ❌=Fail; ⚠️=Requires confirmation/rectification
- Electrical Parameter Verification (Highest Priority, No Icu Downgrade)
| لا. | Check Item | متطلبات / معيار |
| 1 | التصنيف الحالي في | New device ≥ 63A and matches circuit design; continuous load ≤0.8×In |
| 2 | Pole Consistency | Original 3P must use 3P; if changing to 4P for neutral switching, rework wiring & cabinet cutout |
| 3 | Rated Voltage Ue | New device rated voltage ≥ AC400V, compatible with system voltage |
| 4 | Short-circuit Breaking Icu@AC400V | New Icu ≥ 30kA (must not be lower than original NV125-SV 30kA), risk of breaker damage under bus short-circuit |
| 5 | ICS (قدرة كسر الخدمة) | ≥30kA, same as Icu, allows reclose after short-circuit event |
| 6 | Earth Leakage Protection Type | نوع التيار المتردد (or A/F type); adjustable leakage range 100/200/500mA must be retained |
| 7 | وقت تشغيل التسرب | ≤0.04s (عالية السرعة); separately verify for 30mA personal protection version |
| 8 | Thermal-Magnetic Trip Characteristic | الزائد / short-circuit trip curve must match original coordination; electronic trip requires setting verification |
| 9 | Short-circuit Selectivity | Recheck selectivity coordination with upstream and downstream protective devices |
⚠️ Red Line Rule①: Do NOT energize any replacement unit with Icu <30ال. Leave panel de-energized rather than downgrade breaking capacity.
- التركيب الميكانيكي & Dimension Check
| لا. | Check Item | متطلبات / معيار |
| 1 | Mounting Cutout | Compare original NV125-SV (W90×H130×D90mm) with cabinet cutout; re-cut or use adapter plate if dimension mismatch |
| 2 | نوع التركيب | TH35 DIN rail or panel bolt mounting compatible with original bracket |
| 3 | مساحة الأسلاك | In/out terminal clearance sufficient for cable stripping and crimping (meet minimum cable bending radius) |
| 4 | Phase Clearance | Creepage & air clearance between phase terminals comply with new device specification |
| 5 | تبديد الحرارة | Panel spacing meets thermal requirement; no tight side-by-side mounting with internal accessories fitted (UVT especially) |
| 6 | Handle / Door Cutout | Door opening and handle projection match new device; confirm if external rotary handle needs replacement |
| 7 | Torque for Terminals | Tightening torque follows manufacturer manual; conductor cross-section adequate, crimping secure |
⚠️ Red Line Rule②: Do not force oversized cutout or suspend breaker without proper support. Use manufacturer drawing or adapter plate.
- Accessory Compatibility Check (High Risk, Frequently Missed)
| لا. | Check Item | متطلبات / معيار |
| 1 | Accessory Interface | Original AX-03SVU / ال-03SVU / SHTA/D / UVTN/S cannot be fitted to other brands; purchase new accessories matching new breaker brand |
| 2 | إنذار / Position Signal | Re-select equivalent ALAX accessory for new breaker and rewire secondary circuit |
| 3 | Shunt Trip SHT | Reconfigure remote trip, verify AC/DC voltage rating |
| 4 | Under Voltage Trip UVT | Reconfigure UVT; verify trip characteristic (synchronous / non-synchronous) against load type |
| 5 | Mechanical Interlock MI | Dual power interlock must be matched accessory from new brand; interlocks from different brands are incompatible |
| 6 | غطاء المحطة / Lockout | Fit TC/LC protective accessories as per new device spec |
| 7 | External Leakage Module (Import Split Type) | Schneider NSX/EZD, ABB T2N use separate leakage module; confirm module installed and wired correctly |
⚠️ Red Line Rule③: Do NOT reuse old Mitsubishi accessories on new breakers. Mismatched assembly causes poor contact, loss of alarm or protection function.
- رئيسي & Secondary Wiring Check
| لا. | Check Item | متطلبات / معيار |
| 1 | أسلاك الدائرة الرئيسية | Phase sequence matches busbar, terminals fully tightened |
| 2 | Neutral Handling | 3P version neutral passes through unswitched; rewire neutral if replaced with 4P |
| 3 | Zero-sequence CT / Leakage Transformer | Integrated ELCB has built-in CT, no external CT needed; check CT cable passing direction for split leakage module |
| 4 | Secondary Control Wires | AX/AL contacts to PLC / indicator circuit; verify contact type (1a1b) and voltage rating |
| 5 | Shunt / UVT Coil Wiring | SHT is short-time energized, continuous power forbidden; UVT coil voltage matches supply |
| 6 | Wiring Marking | Phase labels and accessory terminal numbers clear and consistent with drawing |
| 7 | عزم الدوران الطرفي | Follow manufacturer torque specification to avoid overheating / اتصال فضفاض |
⚠️ Red Line Rule④: SHT coil is short-time energized, continuous supply burns coil. UVT will not auto-close after voltage recovery; manual closing required in commissioning procedure.
- Pre-commissioning Test & قبول
| لا. | Check Item | متطلبات / معيار |
| 1 | اختبار العزل | Phase-to-phase / phase-earth insulation resistance meets requirement; disconnect secondary / electronic accessories before test |
| 2 | اختبار التسرب (TEST Button) | Press red TEST button; breaker must trip reliably to validate leakage protection |
| 3 | Leakage Threshold Verification | Test tripping at 100/200/500mA if site conditions permit |
| 4 | الزائد / Short-circuit Simulation | Verify thermal-magnetic trip if test available; otherwise confirm factory trip characteristic |
| 5 | Accessory Function Test | Test ALAX alarm contact, SHT remote trip, UVT under-voltage trip one by one |
| 6 | Mechanical Operation | Manual ON/OFF smooth, no jamming, no missing phase |
| 7 | عدم التحميل & Load Trial Run | Close breaker under no-load first; then energize load, monitor temperature and nuisance tripping |
| 8 | Earthing Continuity | Equipment and cabinet protective earth secure |
| 9 | Setting Record Filing | Document new breaker rating, leakage setting and accessory configuration |
⚠️ Red Line Rule⑤: Do NOT put into formal operation before passing TEST button leakage verification. ELCB without working leakage protection functions only as ordinary MCCB, no personnel protection.
- شروط غير قابلة للتطبيق & العمليات المحظورة
| سيناريو / عملية | Judgement |
| Frequent ON/OFF cycling | ⚠️ Thermal-magnetic trip not suitable for high cycle rate; use motor protector or add contactor |
| Heavy corrosion, تراب, التكثيف | ❌ Standard model not suitable; IP rated enclosure + anti-condensation heater required |
| VFD & servo heavy harmonic environment | ⚠️ AC type may nuisance trip; upgrade to A/F type leakage or surge-resistant model |
| Replace breaker with upstream live | ❌ Live working prohibited. خارج السلطة, test dead, lockout-tagout (قلب) مطلوب |
| Reset immediately after leakage trip without investigation | ❌ Do not repeatedly reclose; troubleshoot insulation/earth fault first |
| Replace ELCB with standard MCCB (NF) | ❌ Loss of earth leakage protection, ممنوع منعا باتا |
| Replace with lower Icu rating | ❌ Not allowed |
