Specifications

2. DETAILS OF PARAMETER SETTING
IMR01H03-E4
20
2.4 F22 Current Transformer (CT) Input Specification
If the heater break alarm is selected as the alarm 2, the number of turns * of the current transformer
(CT) used is set for each channel. In addition, it can be set simultaneously for all channels.
* The number of turns = CT ratio
The heater break alarm for three-phase heater can not be specified with MA901.
When the MA901 instrument specification corresponds to contact input or communication
function, the heater break alarm can't be added. Therefore, do not use this parameter.
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CT ratio 1 selection (CTr1) [Heater break alarm for single-phase heater or
heater break alarm for three-phase heater (Z-168) ]
CT ratio 2 selection (CTr2) [Heater break alarm for three-phase heater
(Z-168) ]
The setting the CT ratio from CT1 to CT4 can be made when the CT ratio 1 (CTr1) of MA900 is
selected.
The setting the CT ratio from CT1 to CT8 can be made when the CT ratio 1 (CTr1) of MA901 is
selected.
The setting the CT ratio from CT5 to CT8 can be made when the CT ratio 2 (CTr2) is selected.
CT ratio 2 selection (CTr2) CT ratio 1 selection (CTr1)
CH
R/S
SET
MA900
PV CH
SV AREA
Set the CT ratio.
CH
R/S
SET
MA900
PV CH
SV AREA
Setting method
When the CTL-6-P-N current transformer is used, set the CT ratio to 800.
When the CTL-12-S56-10L-N current transformer is used, set the CT ratio to 1000.
Details of setting Factory set value
0 to 9999 CTL-6-P-N: 800
CTL-12-S56-10L-N: 1000
MA900 (Heater break alarm for single-phase heater)
CH display PV display Details of setting
1 CTr1 Set the CT ratio of CT1.
2 Set the CT ratio of CT2.
3 Set the CT ratio of CT3.
4 Set the CT ratio of CT4.
Continued on the next page.