Relay Output E & F-Frame - Danfoss VLT HVAC Drive FC 102 Design Manual

How to Install
5.4.7 Relay Output E & F-Frame
Relay 1
•
Terminal 01: common
•
Terminal 02: normally open 240 V AC
•
Terminal 03: normally closed 240 V AC
Relay 2
•
Terminal 04: common
•
5 5
Terminal 05: normally open 400 V AC
•
Terminal 06: normally closed 240 V AC
Relay 1 and relay 2 are programmed in 5-40 Function Relay,
5-41 On Delay, Relay, and 5-42 Off Delay, Relay.
Use option module MCB 105 for additional relay outputs.
Figure 5.98 E- and F-Frame Additional Relay Outputs
5.4.8 Parallel Connection of Motors
The adjustable frequency drive can control several motors
connected in parallel. The total current consumption of the
motors must not exceed the rated output current I
the adjustable frequency drive.
When motors are connected in parallel, 1-29 Automatic
Motor Adaptation (AMA) cannot be used.
Small motors have relatively high ohmic resistance in the
stator, which can cause problems at start and low RPM.
164
Design Guide
The electronic thermal relay (ETR) of the adjustable
frequency drive cannot be used as motor protection for
the individual motor of systems with parallel-connected
motors. Provide further motor protection with, for
example, thermistors in each motor or individual thermal
relays (circuit breakers are not a suitable means of
protection).
for
INV
Figure 5.99 Correct Parallel Motor Connection
Danfoss A/S © Rev. 2014-01-13 All rights reserved.
LC lter
MG16C122