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Meter t (thermal and rtd metering) – Rockwell Automation 825-P Modular Protection System for Motors User Manual User Manual

Page 169

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Rockwell Automation Publication 825-UM004D-EN-P - November 2012

169

ASCII Serial Communications Chapter 12

Figure 55 - View Instantanious Meter Values Once - Example

METER T (Thermal and RTD Metering)

The METER T command displays the temperatures of any connected RTDs.
This command also shows the average motor current (x

I

e

), the present

% Thermal Capacity used, and the RTD % Thermal Capacity (if ambient and
winding temperatures are monitored and a winding RTD trip temperature is set).

If the motor is in overload, this command response shows the calculated time to a
thermal trip. If the motor is not in overload (e.g., see Figure 56), the time shown is
9999 seconds. The Starts Available and Time To Reset values are also displayed.

Figure 56 - Calculated Time to a Thermal Trip - Example

=>>MET

825-P Modular Date: 03/05/2003 Time: 16:44:08.404

Prot. System

L1 L2 L3

Current Magnitude (A) 21.2 21.3 21.5

Current Angle (deg) -42.0 -162.5 78.2

Average Current Magnitude (A) 21.3

Motor Load (x Ie) 0.9

GF Current-Core Balance (A) 0.00

GF Current-Core Balance Angle (deg) -76.6

GF Current-Residual (A) 0.0

GF Current-Residual Angle (deg) 72.3

Current Imbalance (%) 1.0

VAN VBN VCN VG

Voltage Magnitude L-N (V) 334 334 334 4

Voltage Angle (deg) 0.0 -119.6 120.8 -116.1

Average Phase (V) 334

Voltage Imbalance (%) 0.0

Real Power (kW) 16

Reactive Power (kVAR) 14

Apparent Power (kVA) 21

Power Factor 0.74 LAG

Frequency (Hz) 60.0

=>>

=>>MET T

825-P Modular Date: 03/05/2003 Time: 16:13:50.321

Prot. System

Max Winding RTD = 61 C

Max Bearing RTD = 48 C

Ambient RTD = 28 C

Max Other RTD = 50 C

RTD 1 WDG = 61 C

RTD 2 NONE

RTD 3 WDG = 59 C

RTD 4 WDG = 58 C

RTD 5 WDG = Open

RTD 6 WDG = 57 C

RTD 7 BRG = 48 C

RTD 8 BRG = 46 C

RTD 9 BRG = 45 C

RTD 10 BRG = 44 C

RTD 11 AMB = 28 C

RTD 12 OTH = 50 C

Motor Load (x Ie) 0.9

Thermal Capacity Used (%) 32

RTD % Thermal Capacity (%) 27

Calculated Time to Thermal Trip (sec) 9999

Time to Reset (min) 0

=>>