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AKM 345 Gen2 Instruction Manual
13. Gen2 With Transmitter
General AKM contact thermometers Series 34/Gen2 for oil temperature and Series 35/Gen2
for winding temperature can be supplied with a transmitter for remote indication or recording.
This gives several advantages over the conventional method with a separate resistance
thermometer, e.g., lower costs, no errors due to different time constants and connecting
wires to indicator.
13.1. Technical Data
Housing: The transmitter is mounted inside the instrument (well protected).
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Nominal supply voltage: 20 - 40V DC.
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Output: 4 -20mA for dial measurement range.
•
Load: 500Ω max at 24V DC. User adjustable output can be used to calibrate output
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directly to load - consult factory.
Accuracy: (Relative to local indication) ±2°C.
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Ambient temperature: -40°C to +70°C.
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Isolation: SWC per IEEE C37.90.1: 2.5kV oscillatory and 5 kV fast transient in both
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transverse and common modes.
Insulation test: 2000 V, 50Hz, 60s to earth acc. To IEC 60-2.
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Terminals 71, 72, and 73 must be short-circuited during insulation test, and the
test voltage shall be raised gradually.
13.2. Installation Instructions
Qualitrol recommends using a separate shielded cable for the wiring to
transmitters. This will help assure safe and trouble free operation. The cable
should ONLY contain the signals and power supply for the TD Transmitter.
See Figures 15 to 15.7 for suggested wiring TD111, TD119 and TD66.
(Rev No. ECN-27992)
18
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