Thermcraft XST-2-0-12-1V1-E28, Instruction Manual

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3200 Series User Manual
Part No HA028651 Issue 11.0 July-12 51
9.2 Current Transformer Input Parameters
This is optional on 3200 controllers and can measure, via an external current transformer, the current flowing through the
electrical load when the heat output is ‘on’ (load current) and also when it is ‘off’ (leakage current).
☺
3216 controllers can be fitted with optional EIA232 digital communications. In this case the current transformer
input is not available.
Alarm If the load current is lower than a threshold limit or the leakage current is higher than a
threshold limit, then an alarm triggers. The hysteresis to exit from either of these alarm
conditions is fixed at 2% of the current transformer span.
Full scale value Selectable from 10 to 1000A
CURRENT TRANSFORMER LIST ‘
C T -iN P
’
Name Scrolling
Display
Parameter Description Value Default Access Level
C t. Id MODULE TYPE CT module identity
Ct.In
CT input circuit fitted As order
code Conf read only
CT.SRC CT SOURCE Selects the output controlling the
current measured by the CT
input.
The source can only be selected
if the output has been configured
for Heat or Cool
none
None
IO-1
Input/output 1
OP-2
Output 2
aa
AA Relay
CT.RNG CT RANGE Sets the CT inputs range 0 to CT full scale value (1000) As order
code Conf
C T. LA T
CT ALARM
LATCH TYPE To configure the latch mode of
the CT input alarm.
A description of alarm latching is
given in the alarm section
nonE
No latching
no
Conf if CT alarm
enabled
Auto Latched with automatic
reset
man Latched with manual reset
Ld. a lm LOAD CURRENT
THRESHOLD Load open circuit alarm threshold
– low alarm
Off
to CT full scale value (settable to
3000)
Read only
LK. A LM LEAK CURRENT
THRESHOLD Leakage current in the off state
alarm threshold – high alarm
Off
to CT full scale value (settable to
3000)
Read only
H c. a lm OVER
CURRENT
THRESHOLD
Overcurrent threshold – high
alarm Off to CT full scale value (settable
to 3000)
LD.AM P
LOAD CURRENT Measured load current L3 if CT input
enabled
LK.AM P LEAK CURRENT CT input leakage current L3 if CT input
enabled
CT.M TR CT METER
RANGE To set the range of the meter.
3208 and 3204 only. 0 to 1000 L3
9.2.1 Analogue Representation of Current
Alarms
The meter is available in 3208 and 3204 controllers only.
Leakage
current
Load
current
High
current