قاطع دائرة الهواء شنايدر NT06H2

NT: MasterPact NT series قاطع دائرة الهواء (ايه سي بي, legacy model, توقف; replacement model MTZ1 06H2)

06: حجم الإطار 06, frame rated current 630A

H2: Breaking capacity class H2; Icu=50kA@440VAC, short-time withstand current Icw=50kA (1ق), Class B selective protection

المعلمات الكهربائية الأساسية

الملاحظات الرئيسية

1. حالة التوقف: NT series scheduled for end-of-sale by the end of 2025. Replacement model MTZ1 06H2, part number LV947203 (draw-out version)
2. Parameter Clarification

Ue=690V: Maximum normal operating voltage

Ui=1000V: تردد الطاقة يتحمل الجهد

Uimp=12kV: دفعة البرق تحمل الجهد. NOT applicable for 12kV high-voltage switchgear, this is an insulation index for low-voltage ACB

3. طلب: Incoming feeder, bus tie and heavy-load outgoing feeder in low-voltage distribution systems, for industrial plants, data centers and marine power distribution; supports selective protection and coordination with upstream/downstream devices
4. Reference Frame Part Numbers

NT06H2 3P Fixed: 47113

NT06H2 3P Draw-out: 47203

NT06H2 4P Fixed: 47119

مُكَمِّلات & قطع غيار

Trip Units: ميكرولوجيك 2.0 / 5.0 / 6.0 / 7.0 (الزائد, تأخير لفترة قصيرة, instantaneous and earth-fault protection)

مُكَمِّلات: Motor operating mechanism, اتصالات مساعدة, fault alarm contacts, closing coil, shunt trip coil, door interlock, phase barriers

Draw-out base: Mandatory independent cradle for draw-out version

إرشادات استكشاف الأخطاء وإصلاحها

1. الفشل في الإغلاق: Undervoltage coil de-energized, incomplete spring charging, cradle not in connected position, interlock blocking
2. Unintended tripping: Check trip unit protection curve, خطأ الأرض, harmonic distortion and temperature rise
3. اختبار العزل: Power frequency withstand test at Ui=1000V level; 12kV impulse withstand is type-test only, no on-site 12kV impulse test

Domestic Alternative Reference

Domestic MT06H2 (شنايدر domestic MT series). Compatible breaking capacity and mounting dimensions for direct replacement.

Schneider MasterPact NT06H2 Air Circuit Breaker Technical Manual (Full Engineering Version, per original datasheet 0613CT0001)

ملاحظات: NT series is legacy discontinued ACB, frame size NT06, In=630A; breaking class H2; frame supplied without trip unit, MicroLogic trip unit to be ordered separately; standard IEC 60947-2, isolating function, Class B selective protection

Table of Contents

1. نظرة عامة على المنتج & شرح كود النموذج
2. Rated Electrical Parameters
3. المعلمات الميكانيكية, الأبعاد الشاملة & وزن
4. MicroLogic Trip Unit Selection
5. قائمة الملحقات & Secondary Terminal Definition
6. تثبيت & متطلبات الأسلاك
7. عملية, Handling & Interlock Description
8. صيانة, تقتيش & استكشاف الأخطاء وإصلاحها
9. الظروف المحيطة
10. Replacement Model Information
11. Original Document Index
12. نظرة عامة على المنتج & شرح كود النموذج

1.1 ملخص

MasterPact NT series low-voltage air circuit breakers for incoming feeders, bus ties and high-current outgoing feeders in 400/690V low-voltage distribution systems. NT06H2 maximum frame rating 630A, available in draw-out or fixed construction, spring charged operation, configurable with intelligent MicroLogic protection unit, supports remote signalling, metering and communication.

تذكير مهم: Ui=1000V (تصنيف الجهد العزل), Uimp=12kV (lightning impulse withstand voltage). NOT 12kV high voltage circuit breaker, only for AC ≤690V low-voltage distribution.

1.2 انهيار النموذج

NT: MasterPact NT series air circuit breaker

06: حجم الإطار 06, frame rated current 630A

H2: Breaking class H2; Icu=50kA@440VAC, Icw=50kA 1s, Class B selective

Part Numbers:

NT06H2 3P Fixed: 47113

NT06H2 3P Draw-out: 47203

NT06H2 4P Fixed: 47119

1.3 حالة المنتج

NT series scheduled end-of-sale by end of 2025; replacement model MTZ1 06H2, part number LV947203 (draw-out). Mounting dimensions and secondary interfaces fully compatible for direct replacement.

2. Rated Electrical Parameters

3. المعلمات الميكانيكية, الأبعاد الشاملة & وزن

3.1 التحمل الميكانيكي

الحياة الميكانيكية: 20,000 العمليات (no-load make/break)

الحياة الكهربائية (400V, في): 10,000 العمليات

Spring charging: Manual charging / motor charging MCH optional

3.2 الأبعاد الشاملة (3ص, وحدة: مم)

نوع ثابت: W300 × H415 × D266

نوع السحب (with cradle): W300 × H415 × D376

4P version width 360mm, height and depth unchanged

3.3 وزن

Fixed frame only: ≈32kg

Draw-out frame + cradle: ≈52kg

3.4 Three positions for draw-out version

1. Connected Position: Main circuit and secondary circuit fully connected, normal operation
2. Test Position: Main circuit disconnected, secondary circuit remains connected for protection test
3. Disconnected Position: Main and secondary circuits fully disconnected, breaker can be withdrawn for maintenance
4. MicroLogic Trip Unit Selection (Must be ordered separately, not included with frame)

Protection setting range: و (منذ وقت طويل) 0.4~1×In; Isd short-time delay 0.5~10×In, delay 0.1/0.2/0.4s; Ii instantaneous 1~15×In.

5. قائمة الملحقات & Secondary Terminal Definition

5.1 الملحقات الاختيارية

1. MCH: Charging motor AC220V / تيار مستمر 24 فولت
2. XF: Closing solenoid AC220V / تيار مستمر 24 فولت
3. مكس: ملف رحلة التحويلة (remote opening)
4. مينيسوتا: الافراج عن انخفاض الجهد (MNu time-delayed undervoltage for auto-transfer application)
5. OF: اتصالات مساعدة (CB on/off status feedback)
6. SDE: Fault trip contacts (signal for overload/short-circuit/earth fault trip)
7. الجبهة الوطنية: Cradle position contacts (connected / test / disconnected position)
8. Phase barriers, cabinet door interlock, mechanical interlock cables, padlock device
9. ULP communication module: مودبوس-RTU, remote signalling & القياس

5.2 Secondary Terminal Definition

6. تثبيت & متطلبات الأسلاك
7. تصاعد: تركيب عمودي عمودي, ±5° tilt allowed; inverted mounting prohibited
8. اتصال الدائرة الرئيسية: اتصال أمامي / rear horizontal / rear vertical connection; apply specified tightening torque for copper busbars to avoid overheating
9. Secondary control wiring: 0.75~1.5mm² multi-core shielded cable; independent AC220V/DC24V control power supply for secondary circuit
10. اختبار العزل: Power frequency withstand test at Ui=1000V level; 12kV impulse withstand is type test only, no on-site 12kV impulse test
11. Draw-out operation: Use dedicated crank for rack-in / rack-out; prohibit racking out breaker from connected position under live condition
12. عملية, Handling & Interlock Description

7.1 Operation Procedure

1. الشحن: Manual charging handle or MCH motor auto charging; charging complete, charged indicator lights on
2. إغلاق: Local front panel close pushbutton / XF remote close; verify interlock conditions before closing
3. افتتاح: Local open pushbutton / MX remote opening / automatic protection tripping; after fault trip, fault reset button must be manually reset before re-closing

7.2 التعشيق (Two-incoming one bus tie scheme)

التعشيق الميكانيكي: Steel cable mechanical interlock, physically prevents simultaneous closing of three ACBs

التعشيق الكهربائي: Close circuit wired in series with normally closed contacts of other breakers for double protection

Cradle position interlock: Closing circuit blocked when not in connected position, closing prohibited

Fault trip interlock: Auto-transfer closing logic blocked upon SDE contact activation

8. صيانة, تقتيش & استكشاف الأخطاء وإصلاحها

8.1 Periodic Maintenance

Semi-annual: Check charging status, on/off indication, contact temperature rise, tightness of secondary wiring

سنوي: Dust cleaning, insulation inspection, trip unit test (using MicroLogic test cable)

Overhaul (كل 5 سنين): Disassemble to inspect main contacts and arc chamber, mechanical lubrication, mechanical life verification

8.2 Typical Troubleshooting

1. الفشل في الإغلاق

Incomplete charging; undervoltage MN coil de-energized; cradle not in connected position; interlock blocked; fault trip not reset

2. Unintended tripping

Verify protection curve; خطأ الأرض; harmonic overload; loose wiring with overheating; voltage dip triggering MN undervoltage trip

3. Charging failure

No power supply to MCH motor; jammed charging mechanism; damaged charged-ready contact

4. No fault signal output

Wrong SDE auxiliary contact wiring, الاتصالات المحروقة

9. الظروف المحيطة

Operating ambient temperature: -5درجه مئوية ~ +70 درجه مئوية; التخفيض مطلوب فوق 40 درجة مئوية

درجة حرارة التخزين: -40درجه مئوية ~ +85 درجه مئوية

الرطوبة النسبية: ≥95% (غير التكثيف)

ارتفاع: ≥2000 م; derating and insulation correction required above 2000m

درجة الحماية: Device IP30; IP40 with cabinet door closed

درجة التلوث: 3

10. Replacement Model Information

NT06H2 → MTZ1 06H2

Frame 630A, وحدة العناية المركزة = 50 كيلو أمبير, compatible MicroLogic trip unit

أبعاد التركيب, primary busbar and secondary terminals fully compatible, no cabinet modification required for in-panel retrofit

Supports ECOSTRUXURE Power software commissioning, upgraded communication interface

Schneider MasterPact NT Full Series Model List (IEC Version, Discontinued ACB, Frame 630~1600A)

قاعدة التسمية: NT + Frame Code + كسر الطبقة

Frame Code: 06=630A; 08=800A; 10=1000A; 12=1250A; 16=1600A

كسر الطبقة: ن1 / H1 / H2 / L1; بناء: مُثَبَّت / السحب; Poles 3P/4P; Frame without trip unit, MicroLogic to be ordered separately

Common Base Parameters: Ui=1000V, Uimp=12kV, Ue max AC690V, Class B selective protection

Breaking Class Definition (440V, Icu ultimate breaking capacity)

ن1: 35ال

H1: 42ال

H2: 50ال (same class as NT06H2)

L1: 130ال (نوع الحد الحالي, application for high short-circuit capacity)

NT Full Model List

Draw-out part number: add 10 to the last digit. Example NT06H2 3P Draw-out:47203; 4P fixed part number +6 (NT06H2 4P Fixed 47119)

Derivative Isolator Models (HA version)

NTxxHA: Isolator (without trip unit, IEC60947-3)

NT06HA / NT08HA / NT10HA / NT12HA / NT16HA

Compatible Trip Unit List (Universal for full NT series)

ميكرولوجيك 2.0: Long-time overload only

MicroLogic 5.0A: Long-time + تأخير لفترة قصيرة + لحظية (preferred for incoming / bus tie)

MicroLogic 6.0A: 5.0أ + حماية خطأ الأرض

MicroLogic 7.0A: 6.0أ + الحماية الحالية المتبقية + harmonic measurement

Replacement Cross Reference Table (NT → MTZ1)

Selection Remarks

1. NT series fully discontinued, لا ينصح به للمشاريع الجديدة; MTZ1 can be used for spare parts replacement for existing projects with compatible primary and secondary interfaces.
2. L1 current-limiting type for systems with extremely high short-circuit current, تكلفة أعلى; H2 is preferred for normal incoming feeder and bus tie.
3. Rated current can be derated within the same frame by changing current sensor inserts, على سبيل المثال. NT06 frame available with 400A/500A/630A sensors.