369 Motor protection system

Main benefits:

Enhanced thermal model with RTD and current imbalance bias

•Complete asset monitoring of stators, bearings and ambient temperature protection with programmable RTD inputs

•Enhanced Reports - Engine health reports provide critical information for preventive maintenance

•Reduce troubleshooting time and maintenance costs

- Event reporting, waveform capture, motor start data logger

•Multiple communication protocols -Modbus RTU, Profibus, DeviceNet, Modbus TCP/IP

•EnerVistaTM 369 Simplified programming of motor setup autoconfigurator

•Optional conformal coating for exposure to chemical or humid environments (optional)

User interface

•40 character LCD display

•10 System and motor status LED

•Keypad for configuring and viewing metering values

•4 programmable analog outputs

• 369 Motor set autoconfigurator

Features:

1.Protection and control

• Enhanced thermal model

• Stall/jam protection

• Undervoltage, overvoltage

• Underfrequency

• Thermal overload

• Undercurrent/current imbalance

• Variable lockout time

• Overtemperature 12 RTDs (R option)

• Start/hour, time between starts

• Voltage phase reversal (M option)

• Current based phase inversion

• Automatic restart under voltage

2. Restart safely and in a timely manner

•User definable parameters and data sizes for DeviceNet polling

•User definable parameters and data size for Profibus DPV1 loop data

•Motor learning data on historical starting characteristics

•Suitable for applications involving variable frequency drives

•Two-speed motor applications

Monitoring measurement

Measure. Current, voltage, power, energy, frequency, temperature, remote RTD

Fault diagnosis, - event recording, oscilloscope, motor start data recorder

Vehicle health report

Statistics and learning motor data

Voltage/Frequency/Power display (M option)

4 analog outputs (M option)

communication

Front panel RS232 port for programming and troubleshooting

Optional embedded Ethernet port

Profibus DP/DPV1 or DeviceNet are available through dedicated ports

Multiple protocols -Modbus RTU, Modbus TCP/IP

EnerVistaTM software

The latest software for GE Multilin product configuration and commissioning

Document and software archive toolsets to ensure that reference materials and device utilities are up to date

The EnerVistaTM integrator enables easy integration of data from 369 into new or existing monitoring systems

Unbalanced (negative sequence current) bias

The thermal limit curves provided by motor manufacturers do not take into account the negative sequence current that causes the rotor to heat up. The 369 relay is programmable to calculate the negative sequence current and bias the thermal model to reflect additional heating.

RTD bias (relay option R)

The thermal overload curve is based only on the measured current, assuming a normal ambient temperature of 40°C and normal motor cooling. If the motor cooling system fails, or the ambient temperature is abnormally high, standard overload protection will not detect an increase in temperature.

When the RTD option is ordered, the 369 can monitor the actual motor temperature and calculate the heat capacity (TCU) used based on the RTD bias curve. This TCU value is then compared with the TCU determined by the overload curve. The higher of the two values is used. For RTD temperatures below the RTD bias minimum setting, no bias will occur. For a maximum stator RTD temperature above the RTD bias maximum setting, the thermal memory is fully biased and forced to 100%.

Cooling time constant

The 369 has a true exponential cooling characteristic that mimics an actual motor

Undercurrent (minimum load) The undercurrent function is used to detect a decrease in motor current caused by a decrease in motor load. This is particularly useful for indicating situations such as suction loss in a pump, airflow loss in a fan, or belt breakage in a conveyor. A separate undercurrent alert level can be set to provide early warning.

Ground overcurrent

For zero sequence ground overcurrent protection, all three motor conductors must pass through a separate ground CT. CTs can be selected to detect high impedance zero sequences

Ground or residual ground current. The ground fault trip can be instantaneous or with a delay of up to 255 seconds. In order to protect as many stator windings as possible, low-level ground fault picking is required. 50:0.025A CT,1 A or 5A CT can be used for ground fault detection.

Fast trip/mechanical blockage

In case of overload, quick motor shutdown reduces damage to gears, bearings and other mechanical components associated with the drive combination. Mechanical plugging protection will operate on currents higher than user-programmable pick levels.

This reporting feature includes every 369 relays that provide critical information about the historical operating characteristics of your motor start and stop operation. The 

report includes:

Motor operation history timeline showing start, emergency restart, stop, trip and alarm operations.

A history of maneuvering trips

Modem connection, or go offline by creating a Settings file to be sent to the device at a later time. Launchpad includes a file archiving and management system that ensures critical files are up to date and available when needed. The documents provided include: