EN
Protecting the Motor STAR-DELTA Time Relay Rail Type Time Relay Star Delta Delay Start
| Place of Origin | China |
| Brand Name | DAQCN |
| Model Number | TBT7-E |
| Certification | CE, ROHS, IEC, TUV,ISO9001 |
| Packaging Details | Standard corrugated carton or customized as you requested |
| Delivery Time | 1-2weeks depend on your quantity |
- Overview
- Recommended Products
Quick Detail:
1. Star-Delta Timer
2. Designated for delay ON of motors star/delta.
| Technical parameters | TBT7-E |
| Function | Star/Delta time relay |
| Supply terminals | A1-A2 |
| Voltage range | 110VAC/220VAC/12-240VACDC |
| Burden | AC 0.3-2VA/DC 0.1-1.2W |
| Voltage range | AC 230V/AC400V(50-60Hz) |
| Power input | AC max.6VA/1.3W |
| Supply voltage tolerance | -15%;+10% |
| Supply indication | green LED |
| Time ranges | Range of time delay t1:0.1s-10 min,Switch time t2:0.1s-1s |
| Time setting | potentionmeter |
| Time deviation | 10%-mechanical setting |
| Repeat accuracy | 0.2%-set value stability |
| Temperature coefficient | 0.05%/℃,at=20℃(0.05%°F，at=68°F) |
| Output | 2XSPDT |
| Current rating | 2x*5A(AC1)/2*16A(AC1) |
| Switching voltage | 250VAC/24VDC |
| Min.breaking capacity DC | 500mW |
| Output indication | red LED |
| Mechanical life | 1*10^7 |
| Electrical life(AC1) | 1*10^5 |
| Reset time | max.200ms |
| Operating temperature | -20℃ to+55℃(-4°Fto 131°F) |
| Storage temperature | -35°C to+75℃(-22°Fto 158°F) |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP40 for front panel/IP20 terminals |
| Operating position | any |
| Overvoltage cathegory | III. |
| Pollution degree | 2 |
| Max. cable(size) mm2 | solid wire max.1*2.5or 2*1.5/with sleeve max.1*2.5(AWG 12) |
| Dimensions | 95.5*18*64mm |
| Weight | W240-82g,A230-80g |
| Standards | EN 61812-1,IEC60947-5-1 |
Description:
TBT7-E Star-Delta Time Relay: Precision and Reliability for Motor Starting Applications
The TBT7-E Star-Delta Time Relay represents a specialized and critical component in industrial motor control systems. Designed specifically to manage the crucial transition in a Star-Delta motor starting circuit, this device ensures that electric motors start smoothly and efficiently, thereby reducing inrush current and minimizing mechanical stress on the motor and connected machinery. Its robust design and precise timing capabilities make it an indispensable solution for control panels across manufacturing, water treatment, and heavy industrial sectors.
Versatile Power Supply and Clear Status Indication
A key feature of the TBT7-E is its exceptional flexibility in power sourcing. The relay operates across a remarkably wide voltage range of 12-240V AC/DC, making it compatible with virtually any standard control circuit voltage without requiring a specific power module. This broad compatibility simplifies inventory management and installation. The device features a green LED supply indicator, providing immediate visual confirmation that the unit is powered and operational, a fundamental aspect for quick troubleshooting and system verification.
Precision Timing for Critical Operations
The core function of the TBT7-E is to deliver accurate and reliable timing control. It governs two distinct time delays: the main Star-to-Delta transition delay (t1), adjustable from 0.1 seconds up to 10 minutes, and a fixed switch time (t2) between contacts of 0.1 to 1 seconds. Time setting is achieved via an intuitive front-panel potentiometer, allowing for easy calibration without the need for complex programming. The relay guarantees exceptional timing accuracy with a repeat accuracy of 0.2% of the set value and outstanding stability, supported by a minimal temperature coefficient of 0.05%/°C. This ensures consistent performance even in environments with fluctuating ambient temperatures.
Robust Output and Enduring Construction
Engineered for durability, the TBT7-E is equipped with two changeover contacts (2xSPDT), each rated for 5A under AC1 conditions. This configuration provides the necessary isolation and switching capability to control the contactors in a standard Star-Delta starter circuit. The relay is built to withstand the rigors of industrial use, boasting a mechanical life of 10 million operations and an electrical life (AC1) of 100,000 cycles. A red LED output indicator clearly signals when the relay is in the activated "Delta" state, offering real-time operational status.
Designed for Seamless Industrial Integration
The TBT7-E is designed for easy and secure installation in standard control panels. It mounts on a DIN rail conforming to EN/IEC 60715, a universal standard for industrial components. With a compact footprint of 95.5x18x64mm, it saves valuable panel space. The device is rated for operation in temperatures from -20°C to +55°C and is protected to IP40 for the front panel, safeguarding it against accidental contact and small foreign objects. Compliance with key international standards, including EN 61812-1 and IEC 60947-5-1, along with an Overvoltage Category III rating, certifies its safety, quality, and suitability for use in demanding industrial electrical environments.
In summary, the TBT7-E Star-Delta Time Relay is a paragon of precision, resilience, and user-friendly design. It provides engineers with a trusted, off-the-shelf solution to ensure the safe and efficient starting of three-phase induction motors, protecting valuable assets and enhancing the reliability of industrial automation systems.
Applications:
Applications
-Designated for delay ON of motors star/delta.
Function Features
-Timet1(star):
time scale 0.1 s-10min devided into 4 time ranges
rough time setting by rotary switch.
-Time t2 (delay):
time scale 0.1 s -1 s
time setting by potentiometer
-Relay status is indicated by LED.
-Module,din rail mounting
Specifications:
| Supply voltage tolerance | -15%;+10% |
| Supply indication | green LED |
| Time ranges | Range of time delay t1:0.1s-10 min,Switch time t2:0.1s-1s |
| Time setting | potentionmeter |
| Time deviation | 10%-mechanical setting |
| Repeat accuracy | 0.2%-set value stability |
| Temperature coefficient | 0.05%/℃,at=20℃(0.05%°F，at=68°F) |
| Output | 2XSPDT |
| Current rating | 2x*5A(AC1)/2*16A(AC1) |
| Switching voltage | 250VAC/24VDC |
| Min.breaking capacity DC | 500mW |
| Output indication | red LED |
| Mechanical life | 1*10^7 |
| Electrical life(AC1) | 1*10^5 |
| Reset time | max.200ms |
| Operating temperature | -20℃ to+55℃(-4°Fto 131°F) |
| Storage temperature | -35°C to+75℃(-22°Fto 158°F) |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP40 for front panel/IP20 terminals |
| Operating position | any |
| Overvoltage cathegory | III. |
| Pollution degree | 2 |
| Max. cable(size) mm2 | solid wire max.1*2.5or 2*1.5/with sleeve max.1*2.5(AWG 12) |
| Dimensions | 95.5*18*64mm |
| Weight | W240-82g,A230-80g |
| Standards | EN 61812-1,IEC60947-5-1 |
Competitive Advantage:
Advantages of Wenzhou DAQUAN Electric Co., Ltd
1. Innovation Leadership
With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.
2. Global Certifications
Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.
3. Scale Supply Stability
Backed by a 7,800㎡ factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.
