シュナイダー 3CT-H1-100-C 変流器

Full Specification of Schneider 3CT-H1-100-C 変流器 (EOCR専用)

モデルコードの解釈

コードセグメント	意味	説明
3CT	製品シリーズ	Three-phase combined current transformer, customized for Schneider EOCR motor protector, manufactured by SAMWHA Korea
H1	仕様コード	Primary current rating 100A, circular aperture, applicable for cable outer diameter ≤25mm
100	定格一次電流	100あ (numerator of transformation ratio)
C	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

コア技術パラメータ

パラメータのカテゴリ	仕様	述べる
Transformation Ratio	100A/5A	Standard secondary current 5A, compatible with full EOCR series
精度クラス	クラス 1	Measuring tolerance ±1%, meets protection and metering requirements
Rated Burden	10バージニア州	Max permissible secondary loop impedance 200mΩ
周波数範囲	50/60Hz	General industrial frequency
定格絶縁電圧	AC 600V	最大連続動作電圧
耐電圧	2kV (50Hz, 1分)	Insulation test standard between windings and earth
Insulation Resistance	≧100MΩ (DC 500V)	Measured by megohmmeter
Aperture Size	Circular φ25mm	Standard bore of H1 series
全体の寸法	W150×H71×D55mm	コンパクトな構造, space-saving installation
取付タイプ	Panel mounting	Compatible with standard 35mm DIN rail
材料	Flame-retardant engineering plastic	Compliant with UL94 V0 standard
重さ	約. 0.58kg	Single unit weight
認証	CE, UL	Conforms to international safety standards
注文番号	3CT-H1-100-C	Exclusive official Schneider order code

全モデルリスト (EOCR 3CT Series)

モデル	Ratio	Aperture Shape	Bore Size	定格電流	取付タイプ
3CT-HS-75-C/Z	75/5あ	Circular	φ22mm	75あ	C=Terminal block, Z=Lead wire
3CT-H1-100-C/Z	100/5あ	Circular	φ25mm	100あ	C=Terminal block, Z=Lead wire
3CT-HH-150-C/Z	150/5あ	四角	30×30mm	150あ	C=Terminal block, Z=Lead wire
3CT-H2-200-C/Z	200/5あ	四角	35×35mm	200あ	C=Terminal block, Z=Lead wire
3CT-H3-300-C/Z	300/5あ	四角	45×45mm	300あ	C=Terminal block, Z=Lead wire
3CT-H4-400-C/Z	400/5あ	四角	55×55mm	400あ	C=Terminal block, Z=Lead wire

Cross-brand Alternative Comparison

ブランド	モデル	Ratio	正確さ	Burden	Aperture	互換性
シュナイダー (SAMWHA)	3CT-H1-100-C	100/5あ	クラス 1	10バージニア州	φ25mm	Perfect match for EOCR
シーメンス	5SD7410-7	100/5あ	クラス 1	10バージニア州	φ25mm	Universal type, adaptation test required
ABB	CT-AR/100	100/5あ	クラス 1	15バージニア州	φ25mm	Higher burden capacity, EOCR compatible
チント	BH-0.66/100	100/5あ	クラス 1	10バージニア州	φ25mm	Cost-effective domestic alternative
美味しい	LMZ1-0.66/100	100/5あ	クラス 1	10バージニア州	φ25mm	国内での交換, minor dimension difference

交換ノート

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
トラブルシューティング & メンテナンス

故障現象	考えられる原因	Inspection Steps	ソリューション
No secondary output	間違った配線, 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
Insulation failure	Dampness, insulation aging, mechanical damage	Measure insulation resistance; inspect shell cracks; test winding insulation	Dry or replace unit; renew CT; repair damaged parts

Safety Rules

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
応用 & Cases

該当するシナリオ

EOCR motor protection system: 過電流, undercurrent and phase loss protection

Low-voltage power distribution: 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 (>400Hz) or DC circuits with poor measuring accuracy

Outdoor installation without waterproof enclosure

Secondary circuit burden exceeding 10VA

典型的なケース

場合 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%.

場合 2: Crane Control Cabinet Renovation

Replace old split CT with combined 3CT-H1-100-C, 節約 50% 設置スペース, simplifying wiring and improving operational reliability.

選択 & 設置ガイドライン

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

設置上の注意事項

Keep correct S1(I+) and S2(I-) 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

メンテナンススケジュール

アイテム	サイクル	標準
Visual inspection	毎月	No crack, looseness or overheating mark
Terminal tightening	四半期ごと	Torque range 2-3N·m
絶縁試験	Yearly	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 正確さ, 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.