HONEYWELL霍尼韦尔执行器M7294执行器M7294Q1007

HONEYWELL霍尼韦尔执行器M7294执行器M7294Q1007
产品资料：
one phase is open. The three-phase voltage will be induced 
at the motor terminals. The diagram shows voltage induction 
at the motor terminals when phase R has been lost with a 
load applied to a three-phase motor. The horizontal axis 
shows the motor load as a percentage of the rated load, and 
the vertical axis shows voltage as a percentage of the rated 
voltage. The lines in the graph show the voltage induced at 
the motor terminals for each load phase loss occurs during 
operation. As the graph shows, phase loss cannot be 
detected because the motor terminal voltage does not drop 
very much even if a phase is lost when the load on the motor 
is light. To detect motor load phase loss during operation, 
use the undervoltage detection function to detect the motor 
terminal voltages at phase loss.
Set the operating time carefully because it will affect the time 
from when the phase loss occurs until tripping when this 
function is used.
Characteristic Curve Diagram
Note: For phase loss of phase R. VST, VTR, and VRS indicate the motor 
terminal voltage at phase loss.
Overvoltage Detection When Only One Phase Exceeds 
the Overvoltage Threshold
The K8AB-PM@ monitors each of the three-phase voltages. 
This means an overvoltage is detected if even only one 
phase exceeds the threshold value. The same applies to 
Undervoltages.
Ideal for monitoring 3-phase power supplies 
for industrial facilities and equipment.
? Monitor overvoltages and undervoltages for three-phase 3-wire 
or 4-wire power supplies. 
DIP switch setting for 3-phase 3-wire or 3-phase 4-wire power 
supply.
? Two SPDT output relays, 6 A at 250 VAC (resistive load).
Separate outputs possible for overvoltages and undervoltages.
? World-wide power specifications supported by one Unit 
(switchable using DIP switch).
? Relay status can be monitored using LED indicator.
Model Number Structure
■Model Number Legend
1. Basic Model
K8AB: Measuring and Monitoring Relays
2. Functions
PW: Three-phase Voltage Relay (Simultaneous upper and lower monitoring)
3. Rated Input Voltage