Schneider Samwha EOCR 3CT-H2-200-C Three-Phase Integrated Current Transformer

Samwha EOCR from Korea, integrated into the 슈나이더 EOCR product line, made in Korea, exclusively for EOCR motor protection relays.

모델 정의

3CT: Three-phase integrated current transformer with three through-hole cores

H2: 사이즈 코드, corresponding to the cable window for 200A model

200: Primary rated current: 200 에이

기음: Old version suffix; Z is the new replacement model (3CT-H2-200-Z). Electrical parameters are identical, only version revision, 직접 플러그 앤 플레이 교체.

핵심 전기 사양

Transformation ratio: 200/5 에이

정확도 등급: 수업 3.0

Rated burden: 1.25 버지니아 (Version C) / 5 버지니아 (New Version Z)

빈도: 50/60 헤르츠

내전압: 1150 다섯

Short-time thermal stability: 40이 / 1 두번째

절연저항: ≥10 MΩ @ 500 DC에서

적용 회로: 교류 600 V motor circuit

무게: 대략. 580 g

전체 치수

W150 mm × H55 mm × D71 mm

Integral epoxy encapsulation, three circular cable holes; DIN 레일 / 패널 장착

Secondary terminals: 1분기, K2 (three independent windings for each phase); secondary wire: 1.5~4 mm² flexible cable

애플리케이션 & 어울리는

✅ Designed exclusively for: EOCR-3DE, FDE, SSD, 3MZ and other digital motor protection relays. It samples three-phase current to implement overload, 위상 손실, locked rotor and current unbalance protection.

✅ Application scenarios: Three-phase asynchronous motor control cabinets, 팬, 물 펌프, compressors and conveyor power circuits.

❌ Not suitable for energy metering (수업 3 accuracy for protection only, not for measurement).

모델 선택 & 대사

New in-stock replacement: 3CT-H2-200-Z, direct replacement for 3CT-H2-200-C

Other models in the same series:

3CT-H1-100-Z: 100/5 에이

3CT-HH-150-Z: 150/5 에이

3CT-H3-300-Z: 300/5 에이

3CT-H4-400-Z: 400/5 에이

설치 지침
Run the main power cable directly through the three holes; P1 = supply side, P2 = motor side. Polarity reversal will cause phase error and false phase-loss tripping. CT secondary circuit must never be open-circuited.
Use only identical 3CT models with one relay; do not mix CTs with different transformation ratios.
주변 온도: -20 ~ +60 ℃; Max altitude: 2000 중.
Wiring Instruction for 3CT-H2-200-C (새로운 모델: 3CT-H2-200-Z)

Three-phase integrated CT with independent secondary windings for R/S/T phases, secondary output 5 에이. Only compatible with EOCR motor protectors; cannot be connected to ordinary ammeters or metering devices.

터미널 정의

Primary side: Three holes for L1(아르 자형), L2(에스), L3(티) 전원 케이블

Polarity rule: P1 (전원 공급 장치) → P2 (모터 부하); arrow points toward the load. Reversed polarity leads to phase fault and incorrect phase-loss alarm.

Secondary terminals (3 groups from top to bottom):

R phase: 1분기, K2

S phase: 1분기, K2

T phase: 1분기, K2

Secondary cable: 1.5~4 mm² flexible wire; shielded twisted pair is recommended; cable length ≤ 15 중.

표준 배선 (EOCR-3DE / FDE / 3MZ / iFMZ / i3MZ)

R-phase K1 → EOCR I1; R-phase K2 → common COM terminal
S-phase K1 → EOCR I2; S-phase K2 → common COM terminal
T-phase K1 → EOCR I3; T-phase K2 → common COM terminal

✅ All three K2 terminals are tied together to the protector’s current COM; single-point grounding at the COM terminal is recommended.

❌ Never allow secondary open circuit (will cause accuracy drift and insulation breakdown).

Note on mechanical life: 용어 “기계적 수명” only applies to devices with moving contacts and mechanical structures (접촉기, 회로 차단기, 릴레이). 변류기 (CT) and voltage transformers (PT) are static components without moving parts. Their service indicators are insulation life, thermal stability and environmental durability only.

유지 & 교체주기 (On-site O&M Reference)

Normal environment (팬 & 펌프, clean indoor cabinet): Evaluate replacement after 8~12 years

가혹한 환경 (고온, 먼지, VFD circuits, frequent direct-on-line motor starting): Check insulation and transformation ratio every 5~7 years

After short-circuit heavy current impact: Test or replace immediately. The iron core will suffer hidden performance degradation, resulting in current sampling deviation and false tripping of the protector.

보주

New model 3CT-H2-200-Z shares the same mechanical structure, iron core and encapsulation as version C, with identical durability. Only the rated burden is upgraded from 1.25 VA to 5 버지니아, making it more stable for long secondary cables and VFD applications. Mounting holes are fully interchangeable with no cabinet modification required.

Naming Rule for 3CT-H Series Three-Phase Integrated CT

체재: 3CT-XX-XXX-Suffix

3CT: 3상 결합 변류기 (EOCR dedicated)

H1/HH/H2/H3/H4: 사이즈 코드 (cable window dimension)

Numeral: Primary current (secondary output 5 에이)

접미사: C = Old version (단종); Z = New version (active replacement)

정확성: 수업 3.0; Secondary output: 5 에이; Compatible with all EOCR motor protectors.

전체 모델 목록 (Old C-version + New Z-version, one-to-one match)

Full Specifications (ascending current rating)

3CT-HS-75, 비율: 75/5 에이

오래된: 3CT-HS-75-C (단종)

새로운: 3CT-HS-75-Z (in production)

3CT-H1-100, 비율: 100/5 에이

오래된: 3CT-H1-100-C (단종)

새로운: 3CT-H1-100-Z (in production)

3CT-HH-150, 비율: 150/5 에이

오래된: 3CT-HH-150-C (단종)

새로운: 3CT-HH-150-Z (in production)

3CT-H2-200 (귀하의 모델), 비율: 200/5 에이

오래된: 3CT-H2-200-C (단종)

새로운: 3CT-H2-200-Z (direct interchange)

3CT-H3-300, 비율: 300/5 에이

오래된: 3CT-H3-300-C (단종)

새로운: 3CT-H3-300-Z (in production)

3CT-H4-400, 비율: 400/5 에이

오래된: 3CT-H4-400-C (단종)

새로운: 3CT-H4-400-Z (in production)

Key Differences between C-version & Z-version

Old suffix -C: Rated burden 1.25 버지니아, limited short secondary wiring length

New suffix -Z: Rated burden upgraded to 5 버지니아, better stability for long cables and VFD circuits; mounting footprint fully compatible for drop-in replacement without cabinet changes.