Description
⚓ Product Introduction
The SELCO T4500-10 is an automatic synchronizer designed to synchronize an incoming generator with a live busbar. It measures voltage, frequency, and phase difference across the generator and busbar sides of the circuit breaker, then adjusts generator speed until synchronization conditions are reached.
The T4500 is designed for generator control applications using conventional governors. Its built-in relay outputs provide increase and decrease speed-control pulses, while the unit can also perform automatic voltage matching. A breaker-closing signal is issued in anticipation of the circuit breaker’s closing time so that connection occurs close to phase coincidence.
🔧 Technical Specifications
| Parameter | Value |
|---|---|
| Brand | SELCO |
| Model | T4500 |
| MPN | T4500-10 |
| Series | T-Series |
| Product Name | Auto Synchronizer |
| Product Type | Automatic Synchronizer Relay Module |
| Main Function | Generator-to-Busbar Synchronization |
| Control Method | Relay-Based Speed Control |
| Frequency Difference Setting | 0.1–1.0 Hz |
| Condition / Status | New – Open Box |
⚙️ Key Functions
• Automatic generator synchronization
• Automatic voltage matching
• Relay-based governor speed control
• Adjustable frequency-difference window
• Adjustable circuit-breaker make time
• Generator and busbar voltage monitoring
• Increase/decrease control pulses
• Automatic breaker-closing signal
SELCO specifies a frequency-difference adjustment range of 0.1 to 1.0 Hz and an adjustable voltage-difference window. The T4500 is also designed for marine applications and has been certified by major marine classification societies.
🚢 Marine & Generator Applications
The T4500 is particularly suited to marine generator systems, generator paralleling equipment, switchboards, and land-based generator installations using conventional speed governors. SELCO lists the T4500 within its generator protection and control product range alongside load-sharing, voltage, frequency, and paralleling relays.
For systems using an electronic speed controller, SELCO specifies that an E7800 Motorised Potentiometer can be used to adapt the T4500’s contact pulses to an appropriate speed-trim signal.
🛠️ Installation & Maintenance
• Verify the complete T4500-10 identification before replacement.
• Confirm the generator and busbar voltage configuration.
• Check the required frequency and voltage-difference settings.
• Verify breaker make time before commissioning.
• Inspect terminal connections and relay contacts.
• Confirm increase/decrease governor signals are correctly wired.
• Test voltage matching and synchronization under controlled conditions.
• Verify the breaker-close output before returning the generator to normal service.
❓ FAQ
Q1: What is the SELCO T4500?
It is an automatic synchronizer for connecting an incoming generator to a live busbar under controlled voltage, frequency, and phase conditions.
Q2: What is the exact part number of this unit?
The referenced item is T4500-10.
Q3: What type of governor does the T4500 support?
The T4500 is specifically designed for applications using conventional governors, with relay outputs providing speed increase and decrease pulses.
Q4: Does the T4500 provide automatic voltage matching?
Yes. Automatic voltage matching is one of the documented functions of the T4500.
Q5: What is the frequency-difference adjustment range?
The documented adjustment range is 0.1 to 1.0 Hz.
Q6: Is the listed unit new?
The referenced eBay listing specifies New – Open Box and describes the unit as unused and in like-new condition.
Q7: Can any T4500 variant be used as a direct replacement?
Not necessarily. T4500 variants can have different voltage configurations, so the exact part number and terminal/input configuration should be matched before installation.
⭐ Recommended Related SELCO Models
- SELCO T4000 Auto Synchronizer
- SELCO T4400 Load Sharer
- SELCO T4800 Load Sharer
- SELCO T4900 VAr Load Sharer
- SELCO T5000 Paralleling Relay
- SELCO T3100 Voltage Relay
- SELCO T3300 3-Phase Voltage Relay
- SELCO T3500 Frequency Deviation Relay
- SELCO T2000 Reverse Power Relay
- SELCO M8100 Synchroscope
These models are part of SELCO’s generator protection, synchronization, load-sharing, and control range and are related products rather than direct substitutes for the T4500-10.
