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February 2014
Figure 22. AC power supply requirements
0.320
0.300
0.280
0.260
0.240
0.220
0.200
0.180
0.160
0.140
0.120
0.100
80
Figure 23. Apparent power
38
36
34
32
30
28
26
24
22
20
80
100
Supply wire requirements
Use 10 - 18 AWG wire rated for the proper temperature of the application. For
wire 10 - 14 AWG use lugs or other appropriate connectors. For connections in
ambient temperatures above 140 °F (60 °C), use a wire rated for 176 °F (80 °C). For
ambient temperatures greater than 176 °F (80 °C), use a wire rated for 230 °F (110
°C). For DC powered transmitters with extended cable lengths, verify that there is
a minimum of 12 VDC at the terminals of the transmitter. Disconnects
Connect the device through an external disconnect or circuit breaker.
Installation category
The installation category for the 8750W is (Overvoltage) Category II.
Overcurrent protection
The Rosemount 8750W flowmeter transmitter requires overcurrent protection of
the supply lines. Maximum ratings of overcurrent devices are shown in
100
120
Power Supply Voltage (AC RMS)
120
140
Power Supply Voltage (AC RMS)
140
160
160
180
Quick Start Guide
180
200
200
220
220
240
240
250
Table 8
.
25
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