R&M Materials Handling HOIST MONITORS - Manual (Page 93)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
Appendix 3 - Current Transformer’s information
Current transformer connections
Current transformers are connected between the incoming terminal block and hoisting contactor. Phase
lines are coming from terminal block and going through the current transformer(s) and then going to the
contactor.
Current transformer A-T20’s black wire is connected to the
terminal 26 and current transformer A-T30’s black wire is
connected to the terminal 27. The grey wires of both
current transformers are connected to the terminal 29, +5
VDC. If there is only one current transformer it is
connected between terminals 27 and 29.
There are two current transformers in motor torque
calculation and one current transformer in load sensor
based system.
An arrow and text IN is printed on one side of MI20. Put
the coming phase line through the current transforms from
that side. In both pictures the phase line goes one time
through the current transformers. (1 ROUND)
Current transformer MI100 has a sticker on the side that
phase line is put trough the current transformers. On the
sticker is a arrow and text IN.