RT28N-32/20A Chint Fuse Base + Fuse Link

2. Main Specification Parameters

2.1 Base (RT28N-32) Parameters

2.2 Fuse Link (RT28-32/20A) Parameters

3. Application & Working Principle

Application Scope: 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.

Working Principle: 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.

Notes: Not recommended for capacitor cabinets; replace with RT36 series if used for capacitor cabinets.

4. Accessory List

5. Competitor & Cross-Brand Equivalent

6. Selection Key Points & Alternative Solutions

Selection Key Points

1. Current Matching: Fuse link rated current shall be 1.1~1.5 times the rated current of protected equipment.
2. Breaking Capacity: Ensure fuse breaking capacity ≥ circuit prospective short-circuit current.
3. Dimension Matching: RT28N-32 base only fits 10×38mm fuse links; mixed use of other sizes is prohibited.
4. Pole Selection: Select 1P (single-phase), 2P (single-phase double-pole) or 3P (three-phase) according to circuit phase.
5. Indicator Requirement: Choose indicator type (RT28N-32X) if blown fuse indication is needed.

Alternative Solutions

1. Upgraded Same Series: RT28N-63X (applicable for fuse links below 63A, AC 690V)
2. Fast Fuse: RT36 series (for special occasions such as capacitor cabinets)
3. Circuit Breaker Replacement: DZ47 series miniature circuit breaker (reusable, with overload and short-circuit protection)
4. Installation & Maintenance Guidelines
5. Verify matching model of base and fuse link before installation; check fuse link for damage.
6. Fasten the rail buckle during DIN rail mounting to avoid poor contact caused by looseness.
7. Tighten terminals during wiring; conductor cross-section shall meet current requirement (2.5-4mm² copper wire recommended for 20A).
8. Inspect fuse status regularly; lit indicator on indicator-type model means the fuse link is blown and shall be replaced timely.
9. 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

1. Model Naming Rule

Base Model: RT28N-□(X) □P

RT: Filled cartridge tubular fuse

28: Design serial number

N: New type base

□: Base rated current (32/63)

X: With blown fuse indicator (optional)

□P: Pole number (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, general purpose

2. Complete Base Model List

3. Complete Fuse Link Model List (for RT28N Base)

3.1 RT28-32 Series Fuse Link (for 32A Base, 10×38mm Ceramic)

3.2 RT28-63 Series Fuse Link (for 63A Base, 14×51mm Ceramic)

4. Typical Combination Model Examples

5. Selection & Application Notes
6. Dimension Matching: RT28-32 series (10×38mm) only fits RT28N-32 base; RT28-63 series (14×51mm) only fits RT28N-63 base.
7. Pole Selection: Choose 1P/2P for single-phase circuits, 3P for three-phase circuits.
8. Indicator Requirement: Select X-type with indicator if fuse blown alert is required.
9. Current Selection: Fuse rated current shall be 1.1~1.5 times the rated current of protected equipment.
10. Special Application: Not suitable for capacitor cabinets; adopt RT36 series as alternative.