Resister Bank Cooling Fan — Manufacturer & Supplier, India
Vayuvents manufactures Resister Bank Cooling Fans for resistor assemblies in load banks, dynamic braking systems, and power electronics. IS 3588. Mumbai. Call +91 90961 88703.
A Resister Bank Cooling Fan provides forced-air cooling for resistor assemblies in a range of electrical and power electronics applications — including dynamic braking resistors for cranes, hoists, and elevators; harmonic filter resistors in VFD systems; neutral earthing resistors in MV switchgear; and power electronics converter heat sinks.
Dynamic braking resistors in crane and elevator systems dissipate the kinetic energy of the lowering load as heat — requiring robust forced-air cooling for the repeated duty cycles of industrial crane service. Vayuvents supplies fans matched to the braking resistor enclosure dimensions and duty cycle heat output.
VFD harmonic filter resistors and neutral earthing resistors in MV switchgear are continuous-duty resistors requiring sustained forced-air cooling at much lower power levels than load bank resistors — smaller, compact fans matched to the enclosure are supplied.
All resister bank cooling fans are supplied with the correct flange connection to interface with the resistor enclosure — ensuring all cooling air passes through the resistor matrix without bypass leakage.
Key Features & Benefits
Matched to Resistor Power
Fan airflow matched to load bank resistor kW rating — adequate cooling at 100% rated load without over- or under-ventilating the resistor matrix.
High Thermal Load
Sized to remove full thermal output of resistors — typically 80 to 120 m³/hr cooling air per kW of resistor heat dissipation.
IP55 Motor
IP55 TEFC motor for dusty generator test areas, outdoor containerised load banks, and high-temperature generator rooms.
Controller Interlocked
Fan start/stop interlocked with load bank controller — fan always running when resistors are energised, preventing unattended operation without cooling.
Custom Integration
Fan sized to specific load bank enclosure dimensions — flanged connection to resistor bay with correct airflow path through resistor matrix.
High Static Pressure
Centrifugal or high-pressure axial for compact multi-row resistor stacks with high internal resistance.
Robust Construction
Heavy-gauge MS casing for vibration, diesel fumes, and high ambient temperatures of generator test areas.
IS 3588 / IS 4894 Compliant
Fan performance tested per IS 3588-1987 with test certificate confirming stated airflow and pressure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Airflow Capacity | 5,000 to 1,00,000 m³/hr |
| Static Pressure | 20 to 150 mmWG |
| Motor Power | 0.75 HP to 30 HP |
| Fan Type | Axial / Centrifugal |
| Motor Enclosure | IP55 TEFC |
| Construction | MS / SS304 |
| Power Supply | 415V 3-Phase 50Hz |
| Control | Controller interlocked start/stop |
| Standards | IS 3588-1987 | IS 4894 |
Product Images
Where It Is Used
- Generator set rated load testing at 25%, 50%, 75%, and 100% load
- UPS and inverter load testing and commissioning acceptance tests
- Transformer load testing before energisation
- Dynamic braking resistors for overhead cranes and hoists
- Elevator and escalator dynamic braking resistor cooling
- VFD harmonic filter resistor cooling
- Neutral earthing resistor cooling in MV switchgear
- Power electronics converter and rectifier heat sink cooling
- Battery charger and rectifier bank cooling
- Naval and offshore generator load testing facilities
- Renewable energy inverter test facility load banks
- Containerised mobile load banks for site generator testing
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FAQs — Resister Bank Cooling Fan
A load bank creates artificial electrical load for testing generator sets and UPS systems. The resistor elements dissipate the test load entirely as heat — which must be force-cooled continuously during testing. Without adequate forced-air cooling, resistors overheat and burn out within seconds at rated load.
80 to 120 m³/hr of cooling air per kW of resistor load is the standard rule. For a 500 kW load bank: 40,000 to 60,000 m³/hr required. The fan must also overcome internal resistor matrix resistance — typically 30 to 80 mmWG. Vayuvents calculates the correct size from your load bank kW rating and enclosure layout.
For large-area resistor banks with low matrix resistance: high-volume axial fans. For compact multi-row stacks with high internal resistance: centrifugal blowers or high-pressure axial fans. Vayuvents recommends the correct type based on the resistor enclosure dimensions and matrix configuration.
Resistors begin to overheat immediately. Most load banks have thermal protection that disconnects the resistor load within seconds of cooling fan failure. The generator test halts until the fan is repaired. Vayuvents recommends keeping a spare fan motor on-site for immediate replacement.
Yes. For mobile load bank trailers and containers, compact direct-drive axial fans providing maximum airflow in minimum space are standard. Vayuvents supplies fans matched to the trailer or container enclosure with flanged connections for clean integration.
Yes. In most load bank configurations, the cooling fan forces air through the resistor matrix and the heated air exhausts through the opposite end of the enclosure — the fan simultaneously cools the resistors and exhausts the heated air. No separate exhaust fan is required.
Contact Vayuvents at enquiry@vayuvents.com or call +91 90961 88703. Share the load bank resistor power rating in kW, enclosure internal dimensions, and existing fan opening size. We will calculate the required airflow and provide a commercial proposal within 24 hours.