슈나이더 NT06H2 공기 회로 차단기

NT: MasterPact NT series 공기 회로 차단기 (ACB, legacy model, 단종; replacement model MTZ1 06H2)

06: 프레임 크기 06, frame rated current 630A

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

핵심 전기 매개변수

주요 내용

1. 단종현황: 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: 상용주파 내전압

Uimp=12kV: 번개 전류 내전압. NOT applicable for 12kV high-voltage switchgear, this is an insulation index for low-voltage ACB

3. 애플리케이션: 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

부속품 & 예비 부품

Trip Units: 마이크로로직 2.0 / 5.0 / 6.0 / 7.0 (초과 적재, 단시간 지연, instantaneous and earth-fault protection)

부속품: Motor operating mechanism, 보조 접점, fault alarm contacts, closing coil, shunt trip coil, door interlock, phase barriers

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

문제 해결 지침

1. 폐쇄 실패: Undervoltage coil de-energized, incomplete spring charging, cradle not in connected position, interlock blocking
2. Unintended tripping: Check trip unit protection curve, 지락, harmonic distortion and temperature rise
3. 절연 테스트: 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 (슈나이더 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)

비고: NT series is legacy discontinued ACB, frame size NT06, 입력=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

목차

1. 제품개요 & 모델 코드 설명
2. Rated Electrical Parameters
3. 기계적 매개변수, 전체 치수 & 무게
4. MicroLogic Trip Unit Selection
5. 액세서리 목록 & Secondary Terminal Definition
6. 설치 & 배선 요구 사항
7. 작업, Handling & Interlock Description
8. 유지, 점검 & 문제 해결
9. 주변 조건
10. Replacement Model Information
11. Original Document Index
12. 제품개요 & 모델 코드 설명

1.1 개요

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.

중요한 알림: Ui=1000V (정격 절연 전압), Uimp=12kV (lightning impulse withstand voltage). NOT 12kV high voltage circuit breaker, only for AC ≤690V low-voltage distribution.

1.2 모델 분석

NT: MasterPact NT series air circuit breaker

06: 프레임 크기 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 제품상태

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

2. Rated Electrical Parameters

3. 기계적 매개변수, 전체 치수 & 무게

3.1 기계적 내구성

기계적 수명: 20,000 운영 (no-load make/break)

전기적 수명 (400다섯, ~ 안에): 10,000 운영

Spring charging: Manual charging / motor charging MCH optional

3.2 전체 치수 (3피, 단위: mm)

고정형: W300 × H415 × D266

인출형 (with cradle): W300 × H415 × D376

4P version width 360mm, height and depth unchanged

3.3 무게

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: 그리고 (오랜 시간) 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. 액세서리 목록 & Secondary Terminal Definition

5.1 옵션 액세서리

1. MCH: Charging motor AC220V / DC24V
2. XF: Closing solenoid AC220V / DC24V
3. MX: 션트 트립 코일 (remote opening)
4. 미네소타: 저전압 릴리스 (MNu time-delayed undervoltage for auto-transfer application)
5. 의: 보조 접점 (CB on/off status feedback)
6. SDE: Fault trip contacts (signal for overload/short-circuit/earth fault trip)
7. PF: Cradle position contacts (connected / test / disconnected position)
8. Phase barriers, 캐비닛 도어 인터록, mechanical interlock cables, padlock device
9. ULP communication module: 모드버스-RTU, remote signalling & 계량

5.2 Secondary Terminal Definition

6. 설치 & 배선 요구 사항
7. 설치: 수직 수직 설치, ±5° tilt allowed; inverted mounting prohibited
8. 주회로 연결: 전면 연결 / 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. 절연 테스트: 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. 작업, Handling & Interlock Description

7.1 Operation Procedure

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

7.2 Interlock (Two-incoming one bus tie scheme)

기계적 인터록: Steel cable mechanical interlock, physically prevents simultaneous closing of three ACBs

전기적 인터록: 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. 유지, 점검 & 문제 해결

8.1 정기 유지 관리

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

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

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

8.2 일반적인 문제 해결

1. 폐쇄 실패

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

2. Unintended tripping

Verify protection curve; 지락; 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, 불에 탄 연락처

9. 주변 조건

작동 주변 온도: -5℃ ~ +70℃; 40℃ 이상에서는 디레이팅 필요

보관온도: -40℃ ~ +85℃

상대습도: 95% 이하 (비응축)

고도: 2000m 이하; derating and insulation correction required above 2000m

보호 정도: Device IP30; IP40 with cabinet door closed

오염도: 3

10. Replacement Model Information

NT06H2 → MTZ1 06H2

프레임 630A, Icu=50kA, compatible MicroLogic trip unit

장착 치수, 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)

명명 규칙: NT + Frame Code + 속보 수업

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

속보 수업: N1 / H1 / H2 / L1; 건설: 결정된 / 인출형; 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 (440다섯, Icu ultimate breaking capacity)

N1: 35그만큼

H1: 42그만큼

H2: 50그만큼 (same class as NT06H2)

L1: 130그만큼 (current-limiting type, 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: 아이솔레이터 (without trip unit, IEC60947-3)

NT06HA / NT08HA / NT10HA / NT12HA / NT16HA

Compatible Trip Unit List (Universal for full NT series)

마이크로로직 2.0: Long-time overload only

MicroLogic 5.0A: 장기간 + 단시간 지연 + 동시에 일어나는 (preferred for incoming / 버스 타이)

MicroLogic 6.0A: 5.0에이 + 지락 보호

MicroLogic 7.0A: 6.0에이 + 잔류 전류 보호 + harmonic measurement

Replacement Cross Reference Table (NT → MTZ1)

Selection Remarks

1. NT series fully discontinued, 새로운 프로젝트에는 권장되지 않습니다; 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, 더 높은 비용; 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, 예를 들어. NT06 frame available with 400A/500A/630A sensors.