슈나이더 3CT-H1-100-C 전류 변압기

Full Specification of Schneider 3CT-H1-100-C 변류기 (EOCR 전용)

모델 코드 해석

코드 세그먼트	의미	설명
3CT	제품 시리즈	Three-phase combined current transformer, customized for Schneider EOCR motor protector, manufactured by SAMWHA Korea
H1	사양 코드	Primary current rating 100A, circular aperture, applicable for cable outer diameter ≤25mm
100	정격 1차 전류	100에이 (numerator of transformation ratio)
기음	Mounting/Terminal Type	Terminal block type; Z stands for direct lead wire type

Quick Identification: 3CT-H1-100-C = Three-phase 100/5A circular-aperture current transformer with terminal block, exclusive for EOCR

핵심 기술 매개변수

매개변수 카테고리	사양	주목
Transformation Ratio	100A/5A	Standard secondary current 5A, compatible with full EOCR series
정확도 등급	수업 1	Measuring tolerance ±1%, meets protection and metering requirements
Rated Burden	10버지니아	Max permissible secondary loop impedance 200mΩ
주파수 범위	50/60헤르츠	General industrial frequency
정격 절연 전압	AC 600V	Maximum continuous operating voltage
내전압	2kV (50헤르츠, 1분)	Insulation test standard between windings and earth
절연저항	≥100MΩ (DC 500V)	Measured by megohmmeter
Aperture Size	Circular φ25mm	Standard bore of H1 series
전반적인 차원	W150×H71×D55mm	컴팩트한 구조, space-saving installation
장착 유형	패널 장착	표준 35mm DIN 레일과 호환 가능
재료	Flame-retardant engineering plastic	Compliant with UL94 V0 standard
무게	대략. 0.58kg	Single unit weight
인증	CE, UL	Conforms to international safety standards
주문 번호	3CT-H1-100-C	Exclusive official Schneider order code

전체 모델 목록 (EOCR 3CT Series)

모델	비율	Aperture Shape	Bore Size	정격전류	장착 유형
3CT-HS-75-C/Z	75/5에이	Circular	φ22mm	75에이	C=Terminal block, Z=Lead wire
3CT-H1-100-C/Z	100/5에이	Circular	φ25mm	100에이	C=Terminal block, Z=Lead wire
3CT-HH-150-C/Z	150/5에이	Square	30×30mm	150에이	C=Terminal block, Z=Lead wire
3CT-H2-200-C/Z	200/5에이	Square	35×35mm	200에이	C=Terminal block, Z=Lead wire
3CT-H3-300-C/Z	300/5에이	Square	45×45mm	300에이	C=Terminal block, Z=Lead wire
3CT-H4-400-C/Z	400/5에이	Square	55×55mm	400에이	C=Terminal block, Z=Lead wire

Cross-brand Alternative Comparison

상표	모델	비율	정확성	Burden	Aperture	호환성
슈나이더 (SAMWHA)	3CT-H1-100-C	100/5에이	수업 1	10버지니아	φ25mm	Perfect match for EOCR
지멘스	5SD7410-7	100/5에이	수업 1	10버지니아	φ25mm	유니버셜 타입, adaptation test required
씨줄	CT-AR/100	100/5에이	수업 1	15버지니아	φ25mm	Higher burden capacity, EOCR compatible
친트	BH-0.66/100	100/5에이	수업 1	10버지니아	φ25mm	Cost-effective domestic alternative
맛있는	LMZ1-0.66/100	100/5에이	수업 1	10버지니아	φ25mm	국내 대체, minor dimension difference

교체 노트

Ensure secondary burden capacity ≥10VA for non-Schneider products to guarantee protection precision
Aperture shall match cable outer diameter; H1 series fits cables below 25mm
Calibrate transformation ratio and phase for alternative models
문제 해결 & 유지

결함 현상	가능한 원인	Inspection Steps	솔루션
No secondary output	잘못된 배선, winding open circuit, loose terminals	Check S1/S2 polarity; test secondary resistance; fasten terminals	Correct wiring polarity; replace faulty CT; reinforce terminals
Large measuring deviation	Overloaded circuit, mismatched ratio, core saturation	Calculate loop impedance; verify ratio; check overload current	Reduce circuit burden; replace matched model; upgrade CT specification
EOCR false tripping	Phase shift, harmonic interference, CT saturation	Test three-phase phase difference; check frequency converter interference; monitor surge current	Recalibrate phase; install harmonic filter; adopt high-saturation CT
절연 불량	Dampness, insulation aging, mechanical damage	Measure insulation resistance; inspect shell cracks; test winding insulation	Dry or replace unit; renew CT; repair damaged parts

안전 규칙

Never test open secondary circuit; short-circuit S1/S2 beforehand to avoid high voltage hazard
Check load and wiring preferentially when deviation exceeds ±2%
Replace CT immediately if insulation resistance below 10MΩ
애플리케이션 & Cases

적용 가능한 시나리오

EOCR motor protection system: 과전류, undercurrent and phase loss protection

저전압 배전: Current monitoring and protection for circuits below AC 600V

Motor control center: Compact layout saves cabinet space

Industrial production lines: Heavy-duty equipment protection in steel, cement and automobile industry

UPS feeder in data center: Precise current monitoring

Inadmissible Scenarios

Long-term operating current over 120A causing core saturation

High frequency (>400헤르츠) or DC circuits with poor measuring accuracy

Outdoor installation without waterproof enclosure

Secondary circuit burden exceeding 10VA

일반적인 경우

사례 1: Motor Protection in Automobile Workshop

3 sets of 55kW three-phase asynchronous motors equipped with EOCR-3E protector. Model 3CT-H1-100-C is selected. It realizes overcurrent trip and rapid phase loss protection, cutting down failure rate by 40%.

사례 2: Crane Control Cabinet Renovation

Replace old split CT with combined 3CT-H1-100-C, 절약 50% 설치 공간, simplifying wiring and improving operational reliability.

선택 & Installation Guidelines

Three-step Selection Method

Calculate current: Multiply rated motor current by 1.1 overload factor
Select aperture: Choose circular or square bore according to cable size
Confirm terminal type: Terminal block for cabinet wiring, lead wire for field wiring

설치시 주의사항

Keep correct S1(나+) and S2(나-) connection to prevent false operation

Strictly prohibit open secondary circuit during installation and maintenance

Total secondary loop impedance shall not exceed 200mΩ

Insulation resistance shall be no less than 100MΩ before commissioning

유지보수 일정

목	주기	기준
육안검사	월간 간행물	No crack, looseness or overheating mark
Terminal tightening	계간지	Torque range 2-3N·m
절연 테스트	매년	Resistance ≥100MΩ
Ratio calibration	Biennially	Tolerance ≤±1%

Schneider 3CT-H1-100-C is a dedicated three-phase 100/5A combined current transformer for EOCR motor protectors. Featuring Class 1 정확성, 10VA rated burden and compact design, it is widely applied in low-voltage motor protection and power monitoring. Match current, aperture and terminal type properly, and comply with polarity and open-circuit prohibition rules to ensure stable system operation.