Harvard 28W 2D Combined HF and Emergency Ballast

This is a High Frequency (Standard) ballast designed to run 28W lamps which is part of our control gear range

Harvard 28W 2D Combined HF and Emergency Ballast


QuickFind: 6929
Part No: DE128-3

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Harvard 28W 2D Combined HF and Emergency Ballast
This is a High Frequency (Standard) ballast designed to run 28W lamps which is part of our control gear range
Price
£47.00
Inc. VAT
£56.40
QuickFind: 6929
Part No: DE128-3

Product Summary

Harvard 28W 2D Combined HF and Emergency Ballast

from Harvard (Model: DE128-3)
A Harvard Combined HF and Emergency Ballast

Technical Specifications

for Harvard 28W 2D Combined HF and Emergency Ballast
Ballast Type High Frequency (Standard)
Cells 3 (3.6v)
Dimming? Non-Dimmable
Height 29 mm
Lamp 28 Watt 2D
Lamp Wattage 28 W
Length 160 mm
No. Of Lamps Single (1x)
Type Control Gear
Width 72 mm

Part Codes

of alternative stock identifiers
Check if Tridonic is ok
D123+/M3 (MACKWELL)
DE28

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Glossary

Ballast

An Electrical Ballast is a device that is used to maintain the current in a circuit. Inductive ballasts are used with Fluorescent Tubes, Compact Fluorescents, Metal Halide, Sodium and Mercury light bulbs.


Electronic Transformer

An electronic transformer is used to reduce mains voltage to a suitable voltage for halogen light bulbs (Not to be confused with LED Drivers). When selecting a transformer it is important to ensure the max wattage is not exceeded by the total wattage consumed by the light bulbs.

Please Note: It is not recommended to "max" out transformers.

IE 5no. lamps x 10 watts each = 50 watts therefore a 60 watt (60VA) transformer would be acceptable, however if you had 6 lamps a 60 watt transformer would be "maxed" out. In this case we would then recommend a 105 watt (105VA) model.


Ballast Factor (BF)

In simple terms Ballast Factor is the percentage of the lamps lumens that the ballast is expected to emit. For example if a ballast had a ballast factor of 0.98 it would be emitting 98% of the lamps rated lumens.


Electromagnetic Ballast

The original type of ballast, the electromagnetic ballast was introduced with the first iteration of fluorescent lamps.


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17 Jan 02:31
Happy with service received
Prompt delivery with very little delay
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16 Jan 09:50
Megaman LEB Bulbs
Very pleased with the product and service, excellent value for money. The bulbs give a good bright light.