CHINT NXM-800/3P 800A Moulded Case Circuit Breaker

Nome completo del modello: NXM-800S/3300 In800A

NXM is the Kunlun series MCCB from CHINT.

Dimensioni del telaio: 800UN, 3-palo, rated current In=800A.

Fornisce sovraccarico, short-circuit and under-voltage protection for low-voltage distribution circuits, and can also be used for infrequent motor starting & stopping protection.

✅ Model Code Breakdown

NXM: Kunlun moulded case circuit breaker serie

800: Dimensioni del telaio (max rated current of the housing)

S/F/H: Grado di potere di interruzione

S: Tipo standard, Icu=36kA @ 400V

F: Medium high breaking capacity, Icu=50kA @ 400V

H: Elevato potere di interruzione, Icu=70kA @ 400V

3: 3 poli (3-fase, nessun polo neutro)

3300: Viaggio magnetotermico, no built-in accessories (configurazione standard)

In800: Rated operating current 800A

📌 Core Electrical Parameters

Tensione operativa nominale Ue: AC400V / 690V, 50Hz

Tensione nominale di isolamento Ui: 1000V

Tensione nominale di tenuta ad impulso Uimp: 12kV

Unità di sgancio: 3300 = thermal-magnetic type (long-time delay overload + protezione istantanea da cortocircuito)

Categoria di utilizzo: Category A (nessun ritardo di breve durata)

Montaggio: Front wired (standard); rear wired / tipo plug-in opzionale

Protezione dall'ingresso: IP30 for the breaker body

Standard di conformità: GB/T 14048.2, CEI 60947-2; with CCC certification

📐 Overall Dimensions & Montaggio (NXM-800 3P)

Larghezza: 210 mm

Altezza: 340 mm

Profondità: 110 mm

Passo dei fori di montaggio: Orizzontale 180 mm, verticale 80 mm

Suitable for main incoming feeder & large branch protection in GGD, GCS power cabinets.

🧩 Optional Built-in Accessories (Ordina separatamente)

Shunt release MX (remote trip)

Under-voltage release MN (viaggi in caso di perdita di potenza)

Auxiliary contact AX, Alarm contact AL

Motor operating mechanism P (electric closing & tripping)

Phase barriers, terminal shrouds, extended cable lugs

Model example with accessories: NXM-800S/3340 800A (sganciatore + contatto ausiliario)

⚠️ Selection & Guida alla sostituzione

1. If short-time delay, communication or four-remote control is required, do not select the standard thermal-magnetic NXM. Upgrade to NXMS / NXMNS electronic MCCB.
2. Competitor cross-reference: Schneider CVS800, ABB T6 800, Delixi CM1-800.
3. Alternativa domestica: CHNT NM1-800, NM8S-800.
4. Nota importante: 800A is a high-current MCCB. The incoming copper busbar should be at least 80×8 mm; aumento della temperatura & short-circuit withstand capacity of busbars must be verified in cabinet design.

Special note: NXM-800 has no F grade; only S (36IL) e H (70IL) are available. F grade only applies to smaller frame sizes.

1. Regola di codifica del modello (NXM-800/3P, viaggio magnetotermico, code starts with 3)

NXM-800【S/H】【P/Z】/3【3-digit accessory code】 In800A

Operation code: No letter = manual handle; P = motor operation; Z = rotary door handle

3P thermal-magnetic accessory codes (valid for NXM-800 frame):

1. Basic Bare Breaker Order Models (Manuale, No Accessories)

1) Standard breaking capacity S type (Icu=36kA @400V)

NXM-800S/3300 800A (most common for main incoming feeders)

2) High breaking capacity H type (Icu=70kA @400V)

NXM-800H/3300 800A (for distribution rooms with high short-circuit current)

Promemoria: NXM-800 does NOT have F breaking grade; never select F.

III. Complete Order Models with Built-in Accessories (3P, In800A)

1) Funzionamento manuale (No P/Z suffix)

Only shunt release (remote trip): NXM-800S/3310 800A

Only auxiliary contact (feedback sullo stato): NXM-800S/3320 800A

Only under-voltage release (trip on power failure): NXM-800S/3330 800A

Sgancio a shunt + contatto ausiliario (most popular remote control): NXM-800S/3340 800A

Sgancio a shunt + under-voltage release: NXM-800S/3350 800A

Contatto ausiliario + contatto di allarme: NXM-800S/3328 800A

Sgancio a shunt + ausiliario + contatto di allarme: NXM-800S/3348 800A

Replace S with H for high breaking capacity version, per esempio. NXM-800H/3340 800A.

2) With Motor Operating Mechanism (Add suffix P)

Motor operated, no accessory: NXM-800SP/3300 800A

Motor operated + sganciatore + contatto ausiliario: NXM-800SP/3340 800A

High breaking capacity motor operated: NXM-800HP/3300 800A

3) Door Rotary Handle (Add suffix Z)

NXM-800SZ/3300 800A; NXM-800HZ/3340 800A

1. External Accessories (Ordinato separatamente, Not Included in Main Model Code)
2. Tipo di cablaggio: Rear connection RCP, plug-in type PIA
3. Raccordi: Phase barriers, terminal shrouds, extended copper cable lugs
4. Selezione della tensione della bobina (MX shunt release / MN under-voltage release): AC220V, AC380V, DC24V, DC220V
5. Standard Order List (Copy directly for purchasing)
6. Standard incoming feeder (no accessory): NXM-800S/3300 800A
7. Remote trip + breaker status feedback: NXM-800S/3340 800A (MX+AX)
8. Protezione da sottotensione + remote trip: NXM-800S/3350 800A (MX+MN)
9. Motor closing + remote trip: NXM-800SP/3340 800A
10. Note supplementari

Unità di sgancio: Code starting with 3 = fixed thermal-magnetic trip (long-time delay overload + cortocircuito istantaneo, nessun ritardo di breve durata). If short-time delay or communication is required, select NXMS electronic MCCB instead.

Corrente nominale: NXM-800 frame only has one rating: In=800A, non regolabile.

Full NXM Thermal-Magnetic MCCB Series (11 Frame Sizes)

Breaking grades: E/S/F/H. Exception: NXM-800 only has S & H, no F grade.

1. Regola di codifica del modello (Termico-Magnetico, Code Starts with 3)

NXM-Frame Size【Breaking Grade】【Operation】/Poles + Accessory Code Rated Current

Breaking grade: E(15IL), S(25~36kA), F(36~50kA), H(50~70kA)

Operazione: No letter = manual; P = motor operation; Z = door rotary handle

Poli: 2P/3P/4P; Thermal-magnetic accessory codes: 3300/3310/3320/3330/3340…

1. Frame Sizes & Rated Current List (Riferimento all'ordine)

1) NXM-63 (2P/3P/4P, E/S/H, no F)

Corrente nominale: 10, 16, 20, 25, 32, 40, 50, 63UN

Modello basso: NXM-63S/3300 63A

2) NXM-125 (2P/3P/4P, E/S/F/H)

Corrente nominale: 10, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125UN

Modello basso: NXM-125S/3300 125A

3) NXM-160 (2P/3P/4P, S/F/H)

Corrente nominale: 32, 40, 50, 63, 80, 100, 125, 140, 160UN

Modello basso: NXM-160S/3300 160A

4) NXM-250 (2P/3P/4P, S/F/H)

Corrente nominale: 125, 140, 160, 180, 200, 225, 250UN

Modello basso: NXM-250S/3300 250A

5) NXM-320 (3P/4P, S/F/H)

Corrente nominale: 250, 280, 300, 315, 320UN

Modello basso: NXM-320S/3300 320A

6) NXM-400 (3P/4P, E/S/F/H)

Corrente nominale: 250, 280, 300, 315, 350, 400UN

Modello basso: NXM-400S/3300 400A

7) NXM-630 (3P/4P, E/S/F/H)

Corrente nominale: 400, 500, 600, 630UN

Modello basso: NXM-630S/3300 630A

8) NXM-800 (3P/4P, only S & H, no F, your selected model)

Corrente nominale: Only 800A (single rating)

Base models: NXM-800S/3300 800A, NXM-800H/3300 800A

9) NXM-1000 (3P/4P, S/H)

Corrente nominale: 800, 1000UN

Modello basso: NXM-1000S/3300 1000A

10) NXM-1250 (3P/4P, S/H)

Corrente nominale: 1000, 1250UN

Modello basso: NXM-1250S/3300 1250A

11) NXM-1600 (3P/4P, S/H)

Corrente nominale: 1250, 1600UN

Modello basso: NXM-1600S/3300 1600A

III. Universal Built-in Accessory Code Table (3P Thermal-Magnetic, Full Series Applicable)

1. Full-Series Model Templates with Operating Mechanism
2. Motor operation (add P): NXM-250SP/3340 250A
3. Door rotary handle (add Z): NXM-400SZ/3300 400A
4. High breaking H type: NXM-630H/3340 630A
5. External Independent Accessories (Ordinato separatamente, Not Printed on Main Model)

Wiring option: Rear connection RCP, plug-in type PIA

Raccordi: Phase barriers, terminal shrouds, extended copper lugs

Tensione della bobina: AC220V, AC380V, DC24V, DC220V

1. Derivative Models of the Same Series
2. NXMS: Electronic MCCB (ritardo di breve durata, adjustable current, communication function; frame size 160~1600A)
3. XMLE: Earth leakage MCCB (with residual current protection)
4. NXHM: Isolating switch (no trip unit, only for isolation)

Ready-to-use Order Models for NXM-800

Bare breaker without accessory: NXM-800S/3300 800A, NXM-800H/3300 800A

Remote trip + feedback sullo stato: NXM-800S/3340 800A

Motor operation + remote trip: NXM-800SP/3340 800A

Protezione da sottotensione: NXM-800S/3350 800A