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| Segmento de modelo | Descrição |
| TR | Filled cartridge tubular fuse (national standard code) |
| 28 | Número de série do projeto |
| N | New base, differentiated from old-type RT28 base |
| 32 | Base rated current 32A (fuse link applicable range: 2-32UM) |
| /20UM | Matched fuse link rated current 20A |
- Main Specification Parameters
2.1 Base (RT28N-32) Parameters
| Parâmetro | Valor |
| Tensão nominal | AC 500V |
| Corrente nominal | 32UM |
| Applicable Fuse Link Size | 10×38mm (cylindrical ceramic fuse link) |
| Tipo de montagem | Montagem em trilho DIN |
| Número do pólo | 1P/2P/3P optional |
| Indicator Device | Optional indicator type (código “X”, neon lamp + resistor assembly) |
| Classe de Proteção | IP20 |
| Padrão Aplicável | CEI 60269-2 |
2.2 Fuse Link (RT28-32/20A) Parameters
| Parâmetro | Valor |
| Corrente nominal | 20UM |
| Categoria de utilização | gG (full-range breaking capacity, para proteção de distribuição de energia) |
| Tensão nominal | AC 500V |
| Quebrando Capacidade | 100o (AC 500V) |
| Dimensão | 10×38mm (ceramic material) |
| Equivalent Industry Model | RO15-20A |
- Aplicativo & Princípio de funcionamento
Escopo de aplicação: 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.
Princípio de funcionamento: 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.
Notas: Not recommended for capacitor cabinets; replace with RT36 series if used for capacitor cabinets.
- Lista de acessórios
| Accessory Type | Descrição |
| Fuse Link | 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 |
- Competitor & Equivalente entre marcas
| Marca | Modelo Equivalente | Principal diferença |
| Schneider | NH00 gG 20A + matching base | Breaking capacity up to 120kA, preço mais alto |
| ABB | OT 20 gG 10×38 + base | Same dimension, 100capacidade de interrupção kA, econômico |
| Delicioso | RT28N-32/20A | Same parameters as Chint, slightly lower price, totalmente intercambiável |
| Siemens | 3NE1 820-0 + base | 100capacidade de interrupção kA, with indicator, preço mais alto |
- Pontos-chave da seleção & Soluções Alternativas
Pontos-chave da seleção
- Correspondência atual: Fuse link rated current shall be 1.1~1.5 times the rated current of protected equipment.
- Quebrando Capacidade: 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.
- Seleção de pólo: Select 1P (monofásico), 2P (single-phase double-pole) or 3P (trifásico) according to circuit phase.
- Indicator Requirement: Choose indicator type (RT28N-32X) if blown fuse indication is needed.
Soluções Alternativas
- Upgraded Same Series: RT28N-63X (applicable for fuse links below 63A, CA 690V)
- Fast Fuse: RT36 series (for special occasions such as capacitor cabinets)
- Circuit Breaker Replacement: DZ47 series miniature circuit breaker (reusable, with overload and short-circuit protection)
- Instalação & Diretrizes de Manutenção
- 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
- Regra de nomenclatura de modelo
Modelo Básico: RT28N-□(X) □P
TR: Filled cartridge tubular fuse
28: Número de série do projeto
N: New type base
□: Base rated current (32/63)
X: With blown fuse indicator (opcional)
□P: Número do pólo (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, propósito geral
- Complete Base Model List
| Modelo Básico | Corrente nominal | Número do pólo | With Indicator | Applicable Fuse Link | Tipo de montagem | Classe de Proteção |
| RT28N-32 1P | 32UM | 1P | Não | RT28-32 series (10×38mm) | Trilho DIN | IP20 |
| RT28N-32 2P | 32UM | 2P | Não | RT28-32 series (10×38mm) | Trilho DIN | IP20 |
| RT28N-32 3P | 32UM | 3P | Não | RT28-32 series (10×38mm) | Trilho DIN | IP20 |
| RT28N-32X 1P | 32UM | 1P | Sim (neon lamp+resistor) | RT28-32 series (10×38mm) | Trilho DIN | IP20 |
| RT28N-32X 2P | 32UM | 2P | Sim (neon lamp+resistor) | RT28-32 series (10×38mm) | Trilho DIN | IP20 |
| RT28N-32X 3P | 32UM | 3P | Sim (neon lamp+resistor) | RT28-32 series (10×38mm) | Trilho DIN | IP20 |
| RT28N-63 1P | 63UM | 1P | Não | RT28-63 series (14×51mm) | Trilho DIN | IP20 |
| RT28N-63 2P | 63UM | 2P | Não | RT28-63 series (14×51mm) | Trilho DIN | IP20 |
| RT28N-63 3P | 63UM | 3P | Não | RT28-63 series (14×51mm) | Trilho DIN | IP20 |
| RT28N-63X 1P | 63UM | 1P | Sim (neon lamp+resistor) | RT28-63 series (14×51mm) | Trilho DIN | IP20 |
| RT28N-63X 2P | 63UM | 2P | Sim (neon lamp+resistor) | RT28-63 series (14×51mm) | Trilho DIN | IP20 |
| RT28N-63X 3P | 63UM | 3P | Sim (neon lamp+resistor) | RT28-63 series (14×51mm) | Trilho DIN | 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 | Corrente nominal | Modelo Equivalente | Quebrando Capacidade | Tensão nominal |
| RT28-32/2A | 2UM | RO15-2A | 100o(AC 500V) | AC 500V |
| RT28-32/4A | 4UM | RO15-4A | 100o(AC 500V) | AC 500V |
| RT28-32/6A | 6UM | RO15-6A | 100o(AC 500V) | AC 500V |
| RT28-32/10A | 10UM | RO15-10A | 100o(AC 500V) | AC 500V |
| RT28-32/16A | 16UM | RO15-16A | 100o(AC 500V) | AC 500V |
| RT28-32/20A | 20UM | RO15-20A | 100o(AC 500V) | AC 500V |
| RT28-32/25A | 25UM | RO15-25A | 100o(AC 500V) | AC 500V |
| RT28-32/32A | 32UM | RO15-32A | 100o(AC 500V) | AC 500V |
3.2 RT28-63 Series Fuse Link (for 63A Base, 14×51mm Ceramic)
| Fuse Link Model | Corrente nominal | Modelo Equivalente | Quebrando Capacidade | Tensão nominal |
| RT28-63/2A | 2UM | RO16-2A | 100o(AC 500V) | AC 500V |
| RT28-63/4A | 4UM | RO16-4A | 100o(AC 500V) | AC 500V |
| RT28-63/6A | 6UM | RO16-6A | 100o(AC 500V) | AC 500V |
| RT28-63/10A | 10UM | RO16-10A | 100o(AC 500V) | AC 500V |
| RT28-63/16A | 16UM | RO16-16A | 100o(AC 500V) | AC 500V |
| RT28-63/20A | 20UM | RO16-20A | 100o(AC 500V) | AC 500V |
| RT28-63/25A | 25UM | RO16-25A | 100o(AC 500V) | AC 500V |
| RT28-63/32A | 32UM | RO16-32A | 100o(AC 500V) | AC 500V |
| RT28-63/40A | 40UM | RO16-40A | 100o(AC 500V) | AC 500V |
| RT28-63/50A | 50UM | RO16-50A | 100o(AC 500V) | AC 500V |
| RT28-63/63A | 63UM | RO16-63A | 100o(AC 500V) | AC 500V |
- Typical Combination Model Examples
| Complete Combination Model | Modelo Básico | Fuse Link Model | Cenário de aplicação |
| 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 |
- Seleção & Notas de aplicação
- Dimension Matching: RT28-32 series (10×38mm) only fits RT28N-32 base; RT28-63 series (14×51mm) only fits RT28N-63 base.
- Seleção de pólo: Choose 1P/2P for single-phase circuits, 3P para circuitos trifásicos.
- Indicator Requirement: Select X-type with indicator if fuse blown alert is required.
- Seleção Atual: 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.
