User guide

9.1 Current sensing relay
The granulator can be equipped with an optional current sensing relay to control
the feed equipment.
The current sensing relay detects the mill motor current consumption and can
temporarily stop accessories such as conveyors, roller feeders etc to avoid putting
further material into the hopper, when the mill is running under heavy loading.
The relay stops and re-starts accessory equipment automatically, without re-setting.
Relay functions and normal settings:
T1 Ð Start delay, prevents the relay from breaking
on connection (0.1 - 10 sec).
The default start delay is 0.1 seconds.
T2 Ð Reaction time, prevents the relay from breaking
during temporary high loading (0.1 - 3 sec).
Default reaction time is 3.0 seconds.
A Ð Hysteresis, adjustable between 5 - 50%
of the set limit.
Default hysteresis is 20 %.
B Ð Limit value, adjustable between 0 - 100 %.
Default setting depends on the current transformer size.
Check the current transformer size and then check the
default setting for this granulator.
C Ð Relay function, N = normal; I = inverted;
Connection
The current sensing relay is connected in series with
the mill motor via a current transformer.
The transformer is connected between M and E1/E2/E3
depending on the secondary current.
(For transformers with transformation to 1 A, this is
connected to E2.)
Default setting for this granulator:
Granulator motor, rated current:
.............. = .............. A
Current transformer:
................................ /1A
Start delay T1: 0,1 sec. other value:
....................
Reaction time T2: 3,0 sec. other value: ....................
Limit values: % .......................... = ............................ A
Hysteresis: %
.......................... = ............................ A
A T2 B
C T1
UGG003/0398 CF Series Granulators
WIRING 37