Schweitzer Engineering Laboratories SEL-734W, Справочник по полевым условиям эксплуатации

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1.3
Date Code 20191029 Field Reference Guide SEL-734W and SEL Wireless Current Sensor
Introduction and Specifications
Product Overview
Product Overview
SEL-WCS Product Overview
Figure 1.3 depicts the key components of the SEL-WCS. Each SEL-WCS
mounts onto and monitors the line current on one phase. The SEL-WCS periodi-
cally sends the load data information, including the harmonics, to an SEL-734W.
Shotgun Stick Loop and Spring
The shotgun stick loop and the spring simplify installation on overhead lines and
hold the SEL-WCS in position. See
SEL-WCS for more information.
Current Transformer (CT)
The SEL-WCS split-core CT harvests energy to power the device and accurately
measures line current and harmonics of the current.
Integrated Radio
The 900 MHz radio module is mounted inside the SEL-WCS cone for environ-
mental protection. The radio communicates to an SEL-734W to transmit line
data.
Control (DIP) Switches
The control (DIP) switches inside the housing allow easy selection of the identifi-
cation of each sensor. An SEL-WCS has a set of four control (DIP) switches for a
network ID, two control (DIP) switches for a phase ID, and a single control (DIP)
switch that determines whether an SEL-WCS sends the harmonic content infor-
mation to the SEL-734W. Sending harmonics requires more energy, so the time
between updates is greater if you configure the sensor to send harmonics.
Figure 1.3 SEL-WCS Key Components
Shotgun Stick Loop
Current Transformer
Twistlock Housing
for Setting Access
Omnidirectional Antenna for
the Radio Transmitter
Control (DIP)
Switch Bank
Spring for Secure Installation