|Digital Energy Protection & Control Motor Protection|
Multilin 869 Overview
Protection & Control
Integrated Arc Flash Protection
The Multilin 8 Series supports an integrated arc flash module providing constant monitoring of an arc flash condition within the switchgear, motor control control centers, or panelboards. With a 2ms protection pass, the 8 Series is able to detect light and overcurrent using 4 arc sensors connected to the 8 Series relay. In situations where an arc flash/fault does occur, the relay is able to quickly identify the fault and issue a trip command to the associated breaker thereby reducing the total incident energy and minimizing resulting equipment damage.
Self-monitoring and diagnostics of the sensors ensures the health of the sensors as well as the full length fiber cables. LEDs on the front panel display of the 845 can be configured to indicate the health of the sensors and its connections to the relay.
Monitoring & Diagnostics
The Multilin 869 includes high accuracy metering and recording for all AC signals. Voltage, current, and power metering are built into the relay as a standard feature. Current and voltage parameters are available as total RMS magnitude, and as fundamental frequency magnitude and angle.
The Multilin 869 motor delivers comprehensive data logging providing the recording of 16 analog values selected from any analog values calculated by the relay. This data capture flexibility allows the operator to measure power factor or reactive power flow (for example), for several hours or even days, enabling detailed analysis and corrective action to be taken.
Advanced Motor Diagnostics
The Multilin 869 provides advanced motor diagnostics including Stator turn to turn fault and broken rotor bar detection. The broken rotor bar detection is a condition monitoring function that continuously monitors the motor's health while in operation. Using an advanced Motor Current Signature Analysis (MCSA), the 869 continuously analyzes the motor current signature and based on preset algorithms will determine when a broken rotor bar is present.
The insulation of stator windings can deteriorates due to aging or by repeated stress on the windings due to prolonged faults or some other factor. This break down in insulation creates inter-turn faults that can very quickly evolve into a major fault in other areas of the stator windings as well. If undetected, this can damage the motor & bring an entire process to a halt. The 869 uses a patented algorithm that uses the sequence components to detect stator turn failure of induction machines. Since unbalance conditions can exist in motors, the 869 uses the unbalance impedance of the machine as a reference & then monitors the phase for changes to this reference.
By providing early indication of potential rotor and stator problems, serious system issues can be avoided, such as reduced starting torque, overloads, torque and speed oscillation and bearing wear.
With fully programmable alarms, the broken rotor bar and the Stator Turn to Turn fault functions provide advanced warning and early detection of impending problems of rotor bar problems and Stator turn to turn faults, enabling maintenance personnel to schedule for predictive maintenance of the motor thereby preventing catastrophic motor failures to maximize motor life and system uptime.”
Advanced Motor Health Report
The 869 motor health report provides a quick snapshot of the motor operating and diagnostic information in an easy way to allow users to make decisions about health of the motor. Based on the graphical representation and trend values of the motor historical data gathered by the 869, users can quickly identify process issues and maintenance requirements before damage occurs and costly repairs are required.
Multilin 869 Motor Health Report
The 869 implements a patented environmental monitoring system that measures and provides operating condition information. Reliable and secure operation of the 869 relay and other electronic devices in the vicinity may be affected by environmental factors. The 869 relay has been designed to meet or exceed all required industry standards. Some operating conditions may be beyond those standards and reduce total lifespan of the device.
Software & Cyber Sercurity