コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
| モデルセグメント | 説明 |
| RT | Filled cartridge tubular fuse (national standard code) |
| 28 | Design serial number |
| N | New base, differentiated from old-type RT28 base |
| 32 | Base rated current 32A (fuse link applicable range: 2-32あ) |
| /20あ | Matched fuse link rated current 20A |
- Main Specification Parameters
2.1 ベース (RT28N-32) パラメータ
| パラメータ | 価値 |
| 定格電圧 | AC 500V |
| 定格電流 | 32あ |
| Applicable Fuse Link Size | 10×38mm (cylindrical ceramic fuse link) |
| 取付タイプ | DINレール取付 |
| 極数 | 1P/2P/3P optional |
| Indicator Device | Optional indicator type (コード “×”, neon lamp + resistor assembly) |
| 保護クラス | IP20 |
| Applicable Standard | IEC 60269-2 |
2.2 ヒューズリンク (RT28-32/20A) パラメータ
| パラメータ | 価値 |
| 定格電流 | 20あ |
| Utilization Category | gG (full-range breaking capacity, for power distribution protection) |
| 定格電圧 | AC 500V |
| 遮断容量 | 100の (AC 500V) |
| 寸法 | 10×38mm (ceramic material) |
| Equivalent Industry Model | RO15-20A |
- 応用 & 動作原理
適用範囲: Used in distribution circuits with AC 45Hz~62Hz, rated voltage up to 500V and rated current up to 32A, serving as overload and short-circuit protection device.
動作原理: When circuit overload or short circuit occurs, the melt inside the fuse link heats up and melts, cutting off the circuit to protect electrical equipment from damage.
注意事項: Not recommended for capacitor cabinets; replace with RT36 series if used for capacitor cabinets.
- 付属品一覧
| Accessory Type | 説明 |
| ヒューズリンク | RT28-32/20A (10×38mm ceramic fuse link) |
| Indicator Assembly | Optional neon lamp + resistor kit (indicator model: RT28N-32X) |
| Mounting Fittings | Rail buckle (fits 35mm standard DIN rail) |
| Fixing Screws | For base installation and fastening |
- 競合他社 & ブランド間の同等品
| ブランド | 同等モデル | 主な違い |
| シュナイダー | NH00 gG 20A + matching base | Breaking capacity up to 120kA, higher price |
| ABB | OT 20 gG 10×38 + ベース | Same dimension, 100kA遮断容量, 費用対効果の高い |
| 美味しい | RT28N-32/20A | Same parameters as Chint, slightly lower price, fully interchangeable |
| シーメンス | 3NE1 820-0 + ベース | 100kA遮断容量, with indicator, higher price |
- 選定のポイント & 代替ソリューション
選定のポイント
- 現在のマッチング: Fuse link rated current shall be 1.1~1.5 times the rated current of protected equipment.
- 遮断容量: Ensure fuse breaking capacity ≥ circuit prospective short-circuit current.
- Dimension Matching: RT28N-32 base only fits 10×38mm fuse links; mixed use of other sizes is prohibited.
- 極の選択: Select 1P (単相), 2P (single-phase double-pole) or 3P (三相) according to circuit phase.
- Indicator Requirement: Choose indicator type (RT28N-32X) if blown fuse indication is needed.
代替ソリューション
- Upgraded Same Series: RT28N-63X (applicable for fuse links below 63A, AC690V)
- Fast Fuse: RT36 series (for special occasions such as capacitor cabinets)
- Circuit Breaker Replacement: DZ47 series miniature circuit breaker (再利用可能, with overload and short-circuit protection)
- インストール & Maintenance Guidelines
- Verify matching model of base and fuse link before installation; check fuse link for damage.
- Fasten the rail buckle during DIN rail mounting to avoid poor contact caused by looseness.
- Tighten terminals during wiring; conductor cross-section shall meet current requirement (2.5-4mm² copper wire recommended for 20A).
- Inspect fuse status regularly; lit indicator on indicator-type model means the fuse link is blown and shall be replaced timely.
- Cut off power supply and use insulated tools when replacing fuse link to avoid electric shock risk.
Chint Cylindrical Fuse Base + Fuse Link Complete Model List
- モデルの命名規則
ベースモデル: RT28N-□(×) □P
RT: Filled cartridge tubular fuse
28: Design serial number
N: New type base
□: Base rated current (32/63)
×: With blown fuse indicator (オプション)
□P: 極数 (1P/2P/3P)
Fuse Link Model: RT28-□/△A (industry equivalent: RO15 series)
□: Matched base rated current (32/63)
△: Fuse link rated current (2-32A/2-63A)
gG: Full-range breaking capacity, 汎用
- Complete Base Model List
| ベースモデル | 定格電流 | 極数 | With Indicator | Applicable Fuse Link | 取付タイプ | 保護クラス |
| RT28N-32 1P | 32あ | 1P | いいえ | RT28-32 series (10×38mm) | DINレール | IP20 |
| RT28N-32 2P | 32あ | 2P | いいえ | RT28-32 series (10×38mm) | DINレール | IP20 |
| RT28N-32 3P | 32あ | 3P | いいえ | RT28-32 series (10×38mm) | DINレール | IP20 |
| RT28N-32X 1P | 32あ | 1P | はい (neon lamp+resistor) | RT28-32 series (10×38mm) | DINレール | IP20 |
| RT28N-32X 2P | 32あ | 2P | はい (neon lamp+resistor) | RT28-32 series (10×38mm) | DINレール | IP20 |
| RT28N-32X 3P | 32あ | 3P | はい (neon lamp+resistor) | RT28-32 series (10×38mm) | DINレール | IP20 |
| RT28N-63 1P | 63あ | 1P | いいえ | RT28-63 series (14×51mm) | DINレール | IP20 |
| RT28N-63 2P | 63あ | 2P | いいえ | RT28-63 series (14×51mm) | DINレール | IP20 |
| RT28N-63 3P | 63あ | 3P | いいえ | RT28-63 series (14×51mm) | DINレール | IP20 |
| RT28N-63X 1P | 63あ | 1P | はい (neon lamp+resistor) | RT28-63 series (14×51mm) | DINレール | IP20 |
| RT28N-63X 2P | 63あ | 2P | はい (neon lamp+resistor) | RT28-63 series (14×51mm) | DINレール | IP20 |
| RT28N-63X 3P | 63あ | 3P | はい (neon lamp+resistor) | RT28-63 series (14×51mm) | DINレール | IP20 |
- Complete Fuse Link Model List (for RT28N Base)
3.1 RT28-32 Series Fuse Link (for 32A Base, 10×38mm Ceramic)
| Fuse Link Model | 定格電流 | 同等モデル | 遮断容量 | 定格電圧 |
| RT28-32/2A | 2あ | RO15-2A | 100の(AC 500V) | AC 500V |
| RT28-32/4A | 4あ | RO15-4A | 100の(AC 500V) | AC 500V |
| RT28-32/6A | 6あ | RO15-6A | 100の(AC 500V) | AC 500V |
| RT28-32/10A | 10あ | RO15-10A | 100の(AC 500V) | AC 500V |
| RT28-32/16A | 16あ | RO15-16A | 100の(AC 500V) | AC 500V |
| RT28-32/20A | 20あ | RO15-20A | 100の(AC 500V) | AC 500V |
| RT28-32/25A | 25あ | RO15-25A | 100の(AC 500V) | AC 500V |
| RT28-32/32A | 32あ | RO15-32A | 100の(AC 500V) | AC 500V |
3.2 RT28-63 Series Fuse Link (for 63A Base, 14×51mm Ceramic)
| Fuse Link Model | 定格電流 | 同等モデル | 遮断容量 | 定格電圧 |
| RT28-63/2A | 2あ | RO16-2A | 100の(AC 500V) | AC 500V |
| RT28-63/4A | 4あ | RO16-4A | 100の(AC 500V) | AC 500V |
| RT28-63/6A | 6あ | RO16-6A | 100の(AC 500V) | AC 500V |
| RT28-63/10A | 10あ | RO16-10A | 100の(AC 500V) | AC 500V |
| RT28-63/16A | 16あ | RO16-16A | 100の(AC 500V) | AC 500V |
| RT28-63/20A | 20あ | RO16-20A | 100の(AC 500V) | AC 500V |
| RT28-63/25A | 25あ | RO16-25A | 100の(AC 500V) | AC 500V |
| RT28-63/32A | 32あ | RO16-32A | 100の(AC 500V) | AC 500V |
| RT28-63/40A | 40あ | RO16-40A | 100の(AC 500V) | AC 500V |
| RT28-63/50A | 50あ | RO16-50A | 100の(AC 500V) | AC 500V |
| RT28-63/63A | 63あ | RO16-63A | 100の(AC 500V) | AC 500V |
- Typical Combination Model Examples
| Complete Combination Model | ベースモデル | Fuse Link Model | アプリケーションシナリオ |
| RT28N-32 1P + RT28-32/16A | RT28N-32 1P | RT28-32/16A | Single-phase 220V circuit, 16A load protection |
| RT28N-32X 2P + RT28-32/20A | RT28N-32X 2P | RT28-32/20A | Single-phase 2P circuit, 20A load protection with blown indicator |
| RT28N-32 3P + RT28-32/32A | RT28N-32 3P | RT28-32/32A | Three-phase 380V circuit, 32A load protection |
| RT28N-63X 3P + RT28-63/50A | RT28N-63X 3P | RT28-63/50A | Three-phase 380V circuit, 50A load protection with blown indicator |
- 選択 & アプリケーションノート
- Dimension Matching: RT28-32 series (10×38mm) only fits RT28N-32 base; RT28-63 series (14×51mm) only fits RT28N-63 base.
- 極の選択: Choose 1P/2P for single-phase circuits, 3P for three-phase circuits.
- Indicator Requirement: Select X-type with indicator if fuse blown alert is required.
- 現在の選択内容: Fuse rated current shall be 1.1~1.5 times the rated current of protected equipment.
- Special Application: Not suitable for capacitor cabinets; adopt RT36 series as alternative.
