1. Introduction
This instruction manual provides essential information for the safe and efficient installation, operation, and maintenance of your OSRAM QTP-OPTIMAL 2x54-58 T5 Fluorescent Ballast. Please read this manual thoroughly before proceeding with installation or use, and retain it for future reference. This electronic ballast is designed to power two T5 fluorescent lamps, operating on a 220/240 volt supply.
2. Safety Information
WARNING: Risk of electric shock. Installation and servicing must be performed by qualified personnel only.
- Always disconnect power at the circuit breaker before installing or servicing the ballast.
- Ensure all wiring connections are secure and comply with local and national electrical codes.
- Do not operate the ballast with damaged wiring or if the casing is compromised.
- This ballast is designed for indoor use only.
- Ensure proper grounding to prevent electrical hazards.
3. Product Overview
The OSRAM QTP-OPTIMAL 2x54-58 T5 Fluorescent Ballast is an electronic control gear engineered for optimal performance of T5 fluorescent lamps. It provides stable power delivery, contributing to extended lamp life and energy efficiency. This model is capable of driving two 54-58 watt T5 lamps.

Image 3.1: Front view of the OSRAM QTP-OPTIMAL 2x54-58 T5 Fluorescent Ballast, showing its compact design and terminal blocks.
4. Technical Specifications
| Feature | Specification |
|---|---|
| Brand | OSRAM |
| Model Number | 880253 (QTP-OPTIMAL 2x54-58 T5) |
| Light Type | Fluorescent |
| Number of Lamps | 2 |
| Lamp Wattage | 54-58 Watts per lamp |
| Input Voltage | 220-240 Volts |
| Frequency | 50 Hertz |
| Special Feature | Dimmable |
| Power Consumption | 58 Watts (total for 2 lamps) |
| Dimensions (L x W x H) | 14.17 x 1.18 x 0.83 inches (36 x 3 x 2.1 cm) |
| Item Weight | 8.5 ounces (239.9 grams) |
| Efficiency | High Efficiency |

Image 4.1: Dimensional drawing of the ballast, indicating length (l, l1), width (b), and height (h) for installation planning.
5. Setup and Installation
IMPORTANT: Installation must be carried out by a qualified electrician in accordance with all applicable electrical codes and regulations.
5.1 Mounting
Mount the ballast securely within the luminaire or enclosure using appropriate fasteners. Ensure adequate ventilation around the ballast to prevent overheating.
5.2 Wiring
Refer to the wiring diagram below for correct connections. Ensure that the input voltage matches the ballast's specified voltage (220-240V). Use appropriate wire gauges for all connections.

Image 5.1: Detailed wiring diagram showing input power connections (220-240V, PE) and output connections to two fluorescent lamps (L).
- Input Power: Connect the 220-240V AC supply to terminals 1 and 3. Connect the Protective Earth (PE) to terminal 2.
- Lamp 1 Connection: Connect the first T5 fluorescent lamp to terminals 23 and 24.
- Lamp 2 Connection: Connect the second T5 fluorescent lamp to terminals 25 and 26.
- Dimmable Feature: If utilizing the dimmable feature, connect the control wires to the designated dimming terminals (not explicitly shown in this basic diagram but typically labeled 'DA' or '1-10V' on the ballast itself). Consult the ballast label for specific dimming connection points.
- Verify all connections are tight and correct before restoring power.
6. Operation
Once properly installed and wired, the OSRAM QTP-OPTIMAL 2x54-58 T5 Fluorescent Ballast will automatically ignite and operate the connected T5 fluorescent lamps when power is supplied. If the dimmable feature is connected, the light output can be adjusted via the compatible control system.
- Ensure compatible T5 fluorescent lamps (54-58W) are used for optimal performance.
- Avoid frequent on/off cycling to maximize lamp and ballast lifespan.
7. Maintenance
The OSRAM QTP-OPTIMAL ballast is designed for long-term, reliable operation with minimal maintenance. However, periodic inspection is recommended.
- Cleaning: Ensure the ballast and surrounding area are free from dust and debris to maintain proper heat dissipation. Disconnect power before cleaning.
- Inspection: Periodically check wiring for any signs of wear, damage, or loose connections.
- Lamp Replacement: Replace fluorescent lamps as they reach their end of life. Ensure power is disconnected before replacing lamps.
8. Troubleshooting
If you encounter issues with your ballast, refer to the following table for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Lamps do not light up | No power supply Incorrect wiring Faulty lamps Faulty ballast | Check circuit breaker and power connections. Verify wiring against diagram. Test with new, known-good lamps. If lamps are good, replace ballast. |
| Lamps flicker or dim erratically | Loose connections Incompatible lamps Dimming control issue Ballast nearing end of life | Check and tighten all wiring connections. Ensure lamps are compatible T5 54-58W. Inspect dimming control wiring and device. Consider ballast replacement. |
| Ballast makes unusual noise | Loose mounting Internal fault | Ensure ballast is securely mounted. Disconnect power and consult a qualified electrician for inspection or replacement. |
If troubleshooting steps do not resolve the issue, contact a qualified electrician or OSRAM customer support.
9. Warranty and Support
For warranty information and technical support, please refer to the official OSRAM website or contact your local OSRAM distributor. Keep your purchase receipt as proof of purchase for warranty claims.
For further assistance, visit the OSRAM website.







