⚙️ Product Description
The QUALITROL 909-300-01 is a Series 909 Seal-In Relay designed to capture and maintain momentary or fast-acting contact closures. It is commonly used with Qualitrol 900 and 910 Rapid Pressure Rise Relays for transformer protection, helping maintain alarm or trip signals after a momentary pressure-related contact operation. The unit contains two independent relays and supports configurable AC or DC supply arrangements. Qualitrol specifies surface mounting inside an enclosure, screw-type terminal connections, LED status indication, and a relay reaction time of less than 20 ms.
QUALITROL 909-300-01
🔧 Key Features
- Series 909 Seal-In Relay
- Model: 909-300-01
- Designed to retain momentary contact signals
- Suitable for transformer protection applications
- Compatible with Qualitrol 900/910 Rapid Pressure Rise Relays
- Two independent relay outputs
- 1 Form A and 1 Form C output configuration
- Surface-mounted enclosure installation
- Stainless-steel protective shield
- LED indication for relay actuation and fault conditions
- Screw-type terminal block connections
- Relay reaction time below 20 ms
📋 Product Datasheet
| Parameter | Value |
|---|---|
| Brand | QUALITROL |
| Model | 909-300-01 |
| Series | 909 |
| Product Name | Seal-In Relay |
| Application | Transformer Protection / Alarm and Trip Signal Retention |
| Country of Origin | United States |
| Condition/Status | New – Open Box |
| Dimensions | Approx. 193.0 × 116.8 × 58.4 mm |
| Number of Relays | 2 |
| Standard Voltage | 24/48/125 VDC, 120 VAC or other configurable ratings |
The published 909 Series documentation gives approximately 193.0 × 116.8 × 58.4 mm for the 909-300-01 enclosure. Standard voltage configurations vary by application and jumper configuration, so the actual voltage configuration should be verified from the unit’s markings before installation.
❓ Common Questions & Answers
Q: What is the QUALITROL 909-300-01 used for?
A: It maintains a momentary contact signal so that an alarm or trip command remains active after the initiating contact returns to its normal state.
Q: Where is it commonly used?
A: It is commonly used with Qualitrol 900/910 Rapid Pressure Rise Relays in transformer protection systems.
Q: How many relays are inside the unit?
A: The Series 909 contains two independent relays for simultaneous control functions.
Q: What are the output contacts?
A: Qualitrol specifies 1 Form A and 1 Form C output styles.
Q: What supply voltages are supported?
A: The Series 909 can be configured for several AC and DC supply arrangements, including 24, 48, and 125 VDC and 120 VAC, with other configurations available depending on the model and setup.
Q: How fast does the relay respond?
A: The published specification gives a relay reaction time of less than 20 ms.
Q: Is the 909-300-01 suitable for transformer protection?
A: Yes. Qualitrol specifically identifies the 909 Series for use with its 900/910 Rapid Pressure Rise Relays in transformer protection applications.
⭐ Recommended QUALITROL Models
- QUALITROL 909-300-02 — Series 909 Seal-In Relay
- QUALITROL 900 — Rapid Pressure Rise Relay
- QUALITROL 910 — Rapid Pressure Rise Relay
- QUALITROL 509 — Transformer Pressure Device
- QUALITROL 206 — Transformer Temperature Monitor
- QUALITROL 208 — Transformer Temperature Monitor
- QUALITROL 509-100 — Pressure Relief Device
- QUALITROL 118 — Transformer Liquid Level Gauge
- QUALITROL 120 — Transformer Temperature Indicator
- QUALITROL 165 — Transformer Temperature Monitor
