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

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

Определение модели

3Коннектикут: Three-phase integrated трансформатор тока with three through-hole cores

Н2: Код размера, corresponding to the cable window for 200A model

200: Primary rated current: 200 А

С: Old version suffix; Z is the new replacement model (3CT-H2-200-Z). Electrical parameters are identical, only version revision, прямая замена plug-and-play.

Основные электрические характеристики

Transformation ratio: 200/5 А

Класс точности: Сорт 3.0

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

Частота: 50/60 Гц

Withstand voltage: 1150 В

Short-time thermal stability: 40Это / 1 второй

Сопротивление изоляции: ≥10 MΩ @ 500 В Вашингтоне

Применимая схема: переменного тока 600 V motor circuit

Масса: приблизительно. 580 г

Габаритные размеры

W150 mm × H55 mm × D71 mm

Integral epoxy encapsulation, three circular cable holes; DIN-рейка / монтаж на панели

Secondary terminals: 1 квартал, К2 (three independent windings for each phase); secondary wire: 1.5~4 mm² flexible cable

Приложение & Соответствие

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

✅ Application scenarios: Three-phase asynchronous motor control cabinets, фанаты, водяные насосы, compressors and conveyor power circuits.

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

Выбор модели & Замена

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 А

3CT-HH-150-Z: 150/5 А

3CT-H3-300-Z: 300/5 А

3CT-H4-400-Z: 400/5 А

Рекомендации по установке
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.
Температура окружающей среды: -20 ~ +60 ℃; Max altitude: 2000 м.
Wiring Instruction for 3CT-H2-200-C (Новая модель: 3CT-H2-200-Z)

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

Определение терминала

Primary side: Three holes for L1(Р), Л2(С), Л3(Т) силовые кабели

Polarity rule: P1 (источник питания) → P2 (нагрузка двигателя); 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: 1 квартал, К2

S phase: 1 квартал, К2

T phase: 1 квартал, К2

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

Стандартная проводка (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: The term “механическая жизнь” only applies to devices with moving contacts and mechanical structures (контакторы, автоматические выключатели, реле). Current transformers (Коннектикут) and voltage transformers (ПТ) are static components without moving parts. Their service indicators are insulation life, thermal stability and environmental durability only.

Обслуживание & Цикл замены (On-site O&M Reference)

Нормальная среда (вентилятор & насос, clean indoor cabinet): Evaluate replacement after 8~12 years

Суровая окружающая среда (высокая температура, пыль, 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.

Дополнительное примечание

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 Вирджиния, 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

Формат: 3CT-XX-XXX-Suffix

3Коннектикут: Three-phase combined current transformer (EOCR dedicated)

H1/HH/H2/H3/H4: Код размера (cable window dimension)

Numeral: Primary current (secondary output 5 А)

Суффикс: C = Old version (прекращено); Z = New version (active replacement)

Точность: Сорт 3.0; Secondary output: 5 А; Compatible with all EOCR motor protectors.

Полный список моделей (Old C-version + New Z-version, one-to-one match)

Full Specifications (ascending current rating)

3CT-HS-75, Соотношение: 75/5 А

Старый: 3CT-HS-75-C (прекращено)

Новый: 3CT-HS-75-Z (в производстве)

3CT-H1-100, Соотношение: 100/5 А

Старый: 3CT-H1-100-C (прекращено)

Новый: 3CT-H1-100-Z (в производстве)

3CT-HH-150, Соотношение: 150/5 А

Старый: 3CT-HH-150-C (прекращено)

Новый: 3CT-HH-150-Z (в производстве)

3CT-H2-200 (Ваша модель), Соотношение: 200/5 А

Старый: 3CT-H2-200-C (прекращено)

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

3CT-H3-300, Соотношение: 300/5 А

Старый: 3CT-H3-300-C (прекращено)

Новый: 3CT-H3-300-Z (в производстве)

3CT-H4-400, Соотношение: 400/5 А

Старый: 3CT-H4-400-C (прекращено)

Новый: 3CT-H4-400-Z (в производстве)

Key Differences between C-version & Z-version

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

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