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GE Multilin SR469-P5-HI-A20-E Motor management relay

GE Multilin SR469-P5-HI-A20-E Motor management relay

GE Multilin SR469-P5-HI-A20-E Motor management relay

Product description

The SR469-P5-HI-A20-E is from GE Multilin and is part of the SR469 motor management relay line.

The device is designed with a 5 amp phase CT secondary winding. The SR 469 relay is designed for use in medium voltage motors and provides integrated management and protection.

AX Control maintains an existing inventory of several different Multilin SR 469 relays.

The SR469-P5-HI-A20-E offers 70-265 VAC, 90-300 VDC control power. The device has an enhanced front panel.

The SR469-P5-HI-A20-E's front panel is well designed and easy to use. The panel includes an RS-232 program port interface with 9600 baud rate, programmable up to 19200 baud rate.

The panel has a sealable withdrawal handle to prevent any unauthorized removal. The front panel has a large LCD display with 40 characters.

This display allows users to view diagnostic messages such as tripping or alarms locally.

In addition, the panel has motor and output status indicators, device indicators, numeric keypad, control and programming keys, including reset, exit and menu buttons, and value keys that allow the user to change set values.

Frequently Asked Questions about SR469-P5-HI-A20-E

What should be done about the unbalanced bias of the heat capacity and bias K factor of the GE SR469-P5-HI-A20-E motor management relay?

GE SR469-P5-HI-A20-E Motor management relays have unplanned bias of heat capacity, heat capacity use should be enabled,

In order to add the heating effect of the unbalanced bias current to the heat capacity.

For unbalanced biased K-factors, the value is calculated by the contribution of the negative current flowing in the rotor due to the imbalance of the K-factor.

There is a formula based on the empirical data statistics of the letter "K", which is equal to 230 divided by the square of the current of the unit locked rotor. Gridlock current =631%FLA or 6.31 times FLA.

What is the cold/heat curve ratio of this relay SR469-P5-HI-A20-E?

By using the data sheet of the SR469-P5-HI-A20-E relay, the safe stall hot time and cold time curve ratio is set to 16/18. That equals 0.89.

By dividing the thermal safe stall time by the cold safe stall speed, the ratio of the hot curve to the cold curve can be simply calculated, and the thermal limit curve of the motor can also be used.

What is the maximum resistance temperature detector bias rating for the SR469-P5-HI-A20-E relay?

The maximum bias rating of the resistance temperature detector is set at the insulation rating or a slightly lower setting.

In order to set the maximum bias of the resistance temperature detector to Class F insulation, the motor should be rated at 155 degrees Celsius.

GE Multilin SR469-P5-HI-A20-E Motor management relay