Schütz,Leistungsschalter,Sensor,Encoder,SPS,Konverter
NV = Earth Leakage Circuit Breaker (ELCB); NF = standard MCCB without earth leakage protection; 125 = Frame size AF125A; SV = Standard S model; 3P = 3-pole; 63A = rated operational current In=63A
✅ Grundlegende elektrische Spezifikationen
| Artikel | Parameter |
| 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 |
| Nennstrom In | 63A |
| Polen | 3P (3 Phasen, neutral not switched) |
| Short-circuit Breaking Capacity Icu/Ics@AC400V | 30Die / 30Die |
| Earth Leakage Sensitivity | 3-Niveau einstellbar: 100mA / 200mA / 500mA |
| Leckagetyp | AC-Typ, surge resistant, anti-harmonic, suppresses nuisance tripping |
| Betriebszeit | Max. 0.04S |
| Gesamtdimension (B×H×T) | 90mm × 130mm × 90mm |
| Gewicht | Ca. 1.1kg |
📌 Model Code Breakdown
- NV: Earth Leakage Circuit Breaker (ELCB, moulded case type with leakage protection)
- 125: Frame rating 125A (Rahmengröße, this unit rated 63A)
- SV: Standard-S-Typ (New WS-V generation); CV = Economy type, HV = High breaking capacity type
- 3P: 3-Pole, protects 3 live phases, neutral line does not pass through breaker
- 63A: Continuous rated circuit current 63A
Common suffix: 1.2.500MA = 100/200/500mA adjustable earth leakage
🛠️ Anwendungsszenarien
Industrial control panels, Wasserpumpen, Fans, small 3-phase power circuits
Integrated protection for equipment: Erdschluss, Überlast & Kurzschlussschutz
Suitable for harmonic-rich environments (VFD, Servoantriebe), less prone to nuisance tripping than older generations
Panelmontage, standard screw terminals; optionales Zubehör: Alarm switch AL, Auxiliary switch AX, Rangierfahrt / Under-voltage coil
⚠️ Auswahl & Ersatzhinweise
- 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; 100mA für den Personenschutz, 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 (63/75/80/100/125A), mounting dimensions remain unchanged.
🧰 Troubleshooting Quick Reference
Trips immediately upon closing: Priority check for earth leakage or damaged load insulation; try higher leakage threshold.
Überlastauslösung: Continuous load current >63A; inspect motor / cable loading.
Kurzschlussauslösung: 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.
Mitsubishi NV125-SV (WS-V Series) Built-in Accessory List (AXT / AL / 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
Modell: AXT-03SVU
Funktion: Reports ON/OFF status of main contacts, cannot distinguish manual opening or fault tripping
Kontaktbewertung: 1a1b (1NEIN +1Ö)
Anwendung: Send breaker position signal to PLC / Anzeigelampen
Verdrahtung: Lead wire type; SLT version available with terminal block
- AL Alarm Switch
Modell: AL-03SVU
Funktion: Activates ONLY when tripped by fault (Überlast, Kurzschluss, Erdschluss); no action during manual opening
Kontaktbewertung: 1a1b
Anwendung: Fault trip alarm, SCADA signal upload, hörbar & optischer Alarm
Combined module: ALAX-03SVU = integrated AX+AL module (provides both position feedback and fault trip signal, am weitesten verbreitet)
- 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
Suffix U: built-in module; L = extended lead; S = special spec
Funktion: Remote electrical trip via control signal; used for emergency stop, fire linkage circuit cut-off
Wichtiger Hinweis: 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
Funktion: 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
| Accessory Model | Name | Beschreibung |
| TC‑1SV | Klemmenabdeckung | Insulation protection for exposed terminals |
| LC‑1SV | Padlock device | Handle lockout, prevent accidental closing |
| MI‑05SV3 | Mechanische Verriegelung | Mechanical interlock for 2 Leistungsschalter (dual power switching) |
| HLF‑1SV | External rotary handle | Panel mounted operating handle, with door interlock |
⚠️ Auswahl & Installationsbeschränkungen (Kritisch)
- One NV125-SV breaker can be fitted with max. one built-in accessory module only. SHT + ALAX cannot be installed together.
Option A: ALAX (Position + fault signal)
Option B: SHT (Fernauslösung)
Option C: 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; thermisch-magnetischer Auslöser; dimension W90×H130×D90mm
Naming format: NV125-SV [3P/4P] [Rated Current A]
✅ Rated Current Range (In)
16A, 20A, 25A, 32A, 40A, 50A, 63A, 75A, 80A, 100A, 125A
✅ Full Model Matrix
3P (3-Phase, 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 (Zielmodell)
NV125-SV 3P 75A
NV125-SV 3P 80A
NV125-SV 3P 100A
NV125-SV 3P 125A
4P (3-Phase + neutraler Pol, 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: Hohe Bruchkapazität, Icu=50kA @AC400V
NV125-SEV/HEV: Electronic trip ELCB (electronic protection, long/short time delay available)
Suffix-Erklärung: 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 (Referenzziel: NV125-SV 3P 63A, AC400V, Icu≥30kA, adjustable leakage 100/200/500mA, thermisch-magnetisch)
⚠️ Important note: 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.
| Marke | Äquivalentes Modell | Schlüsselparameter | Bemerkungen |
| Mitsubishi Original | NV125-SV 3P 63A | 3P 63A, Icu=30kA@400V, AC leakage 100/200/500mA adjustable, thermisch-magnetischer Auslöser | Reference unit, WS-V series |
| Schneider | EZD125E 3P 63A Vigi (Leckagemodul) | 3P 63A, Icu=30kA, adjustable residual current | EZD125E + separate Vigi module; split type leakage, not integrated ELCB; andere Dimension |
| Schneider | NSX100N 3P 63A Vigi | Icu=36kA, adjustable leakage | NSX higher performance, höherer Preis, modular leakage |
| ABB | T2N160 3P 63A RCD | Icu=36kA, adjustable AC residual current | MCCB body + external RCD module, integrated solution Tmax T2N |
| Siemens | 3VT8106-1AA03-0AA0 + leakage trip module | 3P 63A, Icu=25kA, optional leakage module | Breaking capacity slightly lower than Mitsubishi; check short-circuit capacity |
| Sauber | NM1LE-125S/3P 63A | 3P 63A, Icu=35kA, leakage 100/200/500mA adjustable | Main domestic alternative, integrated ELCB, thermisch-magnetisch, similar mounting size |
| Lecker | CDM1LE-125/3P 63A | 3P 63A, Icu=35kA, multi-level adjustable leakage | Inländische Alternative, 125AF frame, integrated leakage |
| Menschen elektrisch | RMM1LE-125/3P 63A | 3P 63A, Icu=35kA, adjustable leakage | Wirtschaftliche inländische Alternative |
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.
- Bruchkapazität: NV125-SV Icu=30kA; Icu cannot be downgraded during replacement, risk of breaker failure under bus short-circuit.
- Zubehörkompatibilität: 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.
- Polauswahl: 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 (AXT-03SVU / AL-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
Umfang: Replace Mitsubishi NV125-SV 3P 63A (ELCB, AC400V, 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 (Höchste Priorität, No Icu Downgrade)
| NEIN. | Artikel prüfen | Erfordernis / Kriterium |
| 1 | Nennstrom In | 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 (Betriebsunterbrechungskapazität) | ≥30kA, same as Icu, allows reclose after short-circuit event |
| 6 | Earth Leakage Protection Type | AC-Typ (or A/F type); adjustable leakage range 100/200/500mA must be retained |
| 7 | Leckbetriebszeit | ≤0.04s (hohe Geschwindigkeit); separately verify for 30mA personal protection version |
| 8 | Thermal-Magnetic Trip Characteristic | Überlast / 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 <30Die. Leave panel de-energized rather than downgrade breaking capacity.
- Mechanische Installation & Dimension Check
| NEIN. | Artikel prüfen | Erfordernis / Kriterium |
| 1 | Mounting Cutout | Compare original NV125-SV (W90×H130×D90mm) with cabinet cutout; re-cut or use adapter plate if dimension mismatch |
| 2 | Montageart | TH35 DIN rail or panel bolt mounting compatible with original bracket |
| 3 | Verkabelungsraum | 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 | Wärmeableitung | 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)
| NEIN. | Artikel prüfen | Erfordernis / Kriterium |
| 1 | Accessory Interface | Original AX-03SVU / AL-03SVU / SHTA/D / UVTN/S cannot be fitted to other brands; purchase new accessories matching new breaker brand |
| 2 | Alarm / 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 (synchron / 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 | Terminal Cover / 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.
- Hauptsächlich & Secondary Wiring Check
| NEIN. | Artikel prüfen | Erfordernis / Kriterium |
| 1 | Verkabelung des Hauptstromkreises | 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 | Klemmendrehmoment | Follow manufacturer torque specification to avoid overheating / Wackelkontakt |
⚠️ 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 & Annahme
| NEIN. | Artikel prüfen | Erfordernis / Kriterium |
| 1 | Insulation Test | Phase-to-phase / phase-earth insulation resistance meets requirement; disconnect secondary / electronic accessories before test |
| 2 | Dichtheitstest (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 | Überlast / 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 | No-load & Probelauf laden | 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.
- Inapplicable Conditions & Verbotene Operationen
| Szenario / Betrieb | Urteil |
| Frequent ON/OFF cycling | ⚠️ Thermal-magnetic trip not suitable for high cycle rate; use motor protector or add contactor |
| Starke Korrosion, Staub, Kondensation | ❌ 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. Ausschalten, test dead, lockout-tagout (HERZ) erforderlich |
| 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, strengstens verboten |
| Replace with lower Icu rating | ❌ Not allowed |
