SELINC SEL-734W Capacitor Bank Control and Wireless Current Sensor
Improve distribution power quality and efficiency with advanced capacitor bank control and wireless current sensing
- Easily install this solution with new capacitor banks, or upgrade traditional installations without the difficulty of installing line post sensors.
- Use your preferred control method: time- and temperature-based switching or current-based control.
- Mount sensors closer to your inductive loads, not just at the control.
- Stock one wireless sensor for all your capacitor bank installations, with support for voltages up to 38 kV.
Overview
Capacitor bank controls help control distribution voltage, reduce losses in distribution systems, and prolong the life of distribution equipment. Advanced controls have improved the switching accuracy by adding three-phase current inputs so that the controls can calculate reactive power. As a result, utilities have been upgrading older capacitor bank controls and installing complicated and expensive current-sensing devices. The SEL-734W Capacitor Bank Control and LINAM Wireless Current Sensor (WCS) solution is a safer, quicker, simpler, and more economical way to provide accurate current- and voltage-based control for these capacitor bank installations.
Key Features
SEL-734W Capacitor Bank Control
- Time- and temperature-based switching or current-based control.
- Preconfigured control templates.
- SELogic® control equations for customized operation.
- Each control pairs with up to three wireless sensors.
- Three control modes: SCADA, automatic, and manual.
- Two enclosure options: full-size or compact. The full-size enclosure provides for three-phase voltage sensing via PT inputs.
- Three field interface options: 4-jaw, 7-pin, and terminal block
LINAM WCS
- The sensors provide high-accuracy current sensing for advanced capacitor bank switching.
- You can install the sensors up to 1,500 feet away from the capacitor bank installation.
- The quick clamp-on, line-powered design makes installation safer and easier.
- Each sensor is rated for any voltage up to 38 kV.
Applications
New or Retrofit Capacitor Bank Installations
Implement the SEL-734W and LINAM WCS solution quickly and easily to add advanced control for existing time- and temperature-based installations or new capacitor banks. Integrate the SEL-734W with temperature-based switching installations now—and easily upgrade to advanced switching control based on power factor or VARs in the future. You can replace your existing socket-based controls with a current-enabled solution without replacing any of the primary equipment using either the 4-jaw socket-based or terminal block interface. For new installations, select a SEL-734W with the 7-pin connector-based interface. The lightweight LINAM WCS installs on an overhead distribution line using a single hot stick. There is no need for an outage or significant hotline work.
Increased Accuracy With Up to Three Sensors
Use up to three LINAM wireless sensors to measure current with ±1 percent accuracy and within a 1-degree phase angle. The SEL-734W uses the sensor data to compute reactive power, make switching decisions, and create load profiles.
Power Quality Monitoring
Improve power quality and address customer concerns with advanced monitoring features, such as harmonic measurements, load profile trending, and voltage sag, swell, and interruption (VSSI) recording.
Location Flexibility
Use the LINAM WCS to measure line current at one point of the distribution system while operating a capacitor bank at a nearby point on the system. This is ideal for situations where the capacitor bank is not near the inductive loads.
Three-Phase Switching
The full-size enclosure option enables the addition of three-phase voltage sensing via PT inputs. This gives the SEL-734W the ability to switch each phase individually by both voltage and current. The enclosure also allows room for accessories.
SEL-734W and LINAM WCS Specifications
| SEL-734W | |
| Power Supply | Continuous Operating Limits 125/250 V supply: 85–264 Vac (50/60 Hz), 85–275 Vdc
VA Rating <40 VA, 15 W maximum <20 VA, 7 W typical Interruption (IEC 60255-11:1979) 100 ms at 250 Vac/Vdc 50 ms at 125 Vac/Vdc |
| 15 Vdc Accessory Power Supply | Continuous Operating Limits Output voltage: 15 Vdc ±5% for accessories, as power supply only
Output current: 2.75 A for accessories, as power supply only |
| Single-Phase AC Voltage Measurement
Inputs (Compact Enclosure) |
Input impedance: 10 MΩ Range: 57–150 V
Accuracy: ±0.15% Maximum rating: 300 V continuous, 600 V for 10 seconds |
| LINAM WCS | |
| Operating Temperature |
–40° to +85°C (–40° to +185°F) |
| Storage Temperature |
–40° to +85°C (–40° to +185°F) |
| Operating Environment | Pollution degree: 2
Relative humidity: 5%–95%, noncondensing Maximum altitude: 2,000 m |
| Ingress Protection | IP67 |
| Overvoltage | Category III |
| Insulation Class | Class III |
| Radio Frequency | 902–928 MHz ISM band
(United States/Canada) 902–907.5 and 915–928 MHz ISM band (Brazil) |
| Clamp Range (LINAM WCS) |
6.35 mm to 31.75 mm (0.25 in to 1.25 in) |
| Dimensions | 141.7 mm diameter × 177.0 mm height (5.58 in diameter × 6.97 in height) |
| Weight | 0.85 kg (1.9 lb) |
| Power System Frequency Range |
45–65 Hz |
| Accuracy | Load magnitude: ±1% typical
Phase measurement: ~1 degrees typical |
| Maximum Voltage | 38 kV (L-L) |
| Minimum Load Current |
2 A |
| Maximum Steady-State Load Current |
1,000 A |
| Maximum Fault Current |
25 kA for 10 cycles |
Making Electric Power Safer, More Reliable, and More Economical
+1.509.332.1890
info@selinc.com
selinc.com
2024 by Schweitzer Engineering Laboratories, Inc. PF00648 · 20240130.
Documents / Resources
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SELINC SEL-734W Capacitor Bank Control and Wireless Current Sensor [pdf] Owner's Manual SEL-734W, LINAM WCS, SEL-734W Capacitor Bank Control and Wireless Current Sensor, SEL-734W, Capacitor Bank Control and Wireless Current Sensor, Bank Control and Wireless Current Sensor, Control and Wireless Current Sensor, and Wireless Current Sensor, Wireless Current Sensor, Current Sensor, Sensor |