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

Nom complet du modèle: NXM-800S/3300 In800A

NXM is the Kunlun series MCCB from CHINT.

Taille du cadre: 800UN, 3-pôle, rated current In=800A.

Il fournit une surcharge, 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 série

800: Taille du cadre (max rated current of the housing)

S/F/H: Niveau de pouvoir de coupure

S: Modèle standard, Icu=36kA @ 400V

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

H: Pouvoir de coupure élevé, Icu=70kA @ 400V

3: 3 poteaux (3-phase, pas de pôle neutre)

3300: Déclenchement thermomagnétique, no built-in accessories (configuration standard)

In800: Rated operating current 800A

📌 Core Electrical Parameters

Tension assignée d'emploi Ue: AC400V / 690V, 50Hz

Tension assignée d'isolement Ui: 1000V

Tension assignée de tenue aux chocs Uimp: 12kV

Déclencheur: 3300 = thermal-magnetic type (long-time delay overload + protection instantanée contre les courts-circuits)

Catégorie d'utilisation: Catégorie A (pas de court délai)

Montage: Front wired (standard); rear wired / type de plug-in en option

Protection contre la pénétration: IP30 for the breaker body

Normes de conformité: GB/T 14048.2, CEI 60947-2; with CCC certification

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

Largeur: 210 mm

Hauteur: 340 mm

Profondeur: 110 mm

Pas de trou de montage: Horizontal 180 mm, verticale 80 mm

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

🧩 Optional Built-in Accessories (Commander séparément)

Shunt release MX (remote trip)

Under-voltage release MN (déclenchements sur perte de puissance)

Auxiliary contact AX, Alarm contact AL

Motor operating mechanism P (electric closing & trébucher)

Phase barriers, terminal shrouds, extended cable lugs

Model example with accessories: NXM-800S/3340 800A (déclencheur shunt + contact auxiliaire)

⚠️ Sélection & Guide de remplacement

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. Alternative nationale: CHNT NM1-800, NM8S-800.
4. Remarque importante: 800A is a high-current MCCB. The incoming copper busbar should be at least 80×8 mm; temperature rise & short-circuit withstand capacity of busbars must be verified in cabinet design.

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

1. Règle de codage du modèle (NXM-800/3P, déclenchement magnéto-thermique, 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 (Manuel, 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)

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

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

1) Fonctionnement manuel (No P/Z suffix)

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

Only auxiliary contact (retour d'état): NXM-800S/3320 800A

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

Déclencheur shunt + contact auxiliaire (most popular remote control): NXM-800S/3340 800A

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

Contact auxiliaire + contact d'alarme: NXM-800S/3328 800A

Déclencheur shunt + auxiliaire + contact d'alarme: NXM-800S/3348 800A

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

2) With Motor Operating Mechanism (Add suffix P)

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

Motor operated + déclencheur shunt + contact auxiliaire: 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. Accessoires externes (Commandé séparément, Not Included in Main Model Code)
2. Type de câblage: Rear connection RCP, plug-in type PIA
3. Raccords: Phase barriers, terminal shrouds, extended copper cable lugs
4. Coil voltage selection (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. Protection contre les sous-tensions + remote trip: NXM-800S/3350 800A (MX+MN)
9. Motor closing + remote trip: NXM-800SP/3340 800A
10. Notes complémentaires

Déclencheur: Code starting with 3 = fixed thermal-magnetic trip (long-time delay overload + court-circuit instantané, pas de court délai). If short-time delay or communication is required, select NXMS electronic MCCB instead.

Courant nominal: NXM-800 frame only has one rating: Entrée=800A, non réglable.

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. Règle de codage du modèle (Thermique-Magnétique, Code Starts with 3)

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

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

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

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

1. Frame Sizes & Rated Current List (Order Reference)

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

Courant nominal: 10, 16, 20, 25, 32, 40, 50, 63UN

Modèle de base: NXM-63S/3300 63A

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

Courant nominal: 10, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125UN

Modèle de base: NXM-125S/3300 125A

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

Courant nominal: 32, 40, 50, 63, 80, 100, 125, 140, 160UN

Modèle de base: NXM-160S/3300 160A

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

Courant nominal: 125, 140, 160, 180, 200, 225, 250UN

Modèle de base: NXM-250S/3300 250A

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

Courant nominal: 250, 280, 300, 315, 320UN

Modèle de base: NXM-320S/3300 320A

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

Courant nominal: 250, 280, 300, 315, 350, 400UN

Modèle de base: NXM-400S/3300 400A

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

Courant nominal: 400, 500, 600, 630UN

Modèle de base: NXM-630S/3300 630A

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

Courant nominal: Only 800A (single rating)

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

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

Courant nominal: 800, 1000UN

Modèle de base: NXM-1000S/3300 1000A

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

Courant nominal: 1000, 1250UN

Modèle de base: NXM-1250S/3300 1250A

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

Courant nominal: 1250, 1600UN

Modèle de base: 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 (Commandé séparément, Not Printed on Main Model)

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

Raccords: Phase barriers, terminal shrouds, extended copper lugs

Tension de bobine: AC220V, AC380V, DC24V, DC220V

1. Derivative Models of the Same Series
2. NXMS: Electronic MCCB (délai de courte durée, adjustable current, communication function; frame size 160~1600A)
3. XMLE: Earth leakage MCCB (avec protection contre les courants résiduels)
4. NXHM: Interrupteur d'isolement (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 + retour d'état: NXM-800S/3340 800A

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

Protection contre les sous-tensions: NXM-800S/3350 800A