Input For Pt100/Pt1000; Input For Ptc/Thermal Switch; Backup Fuses - Grundfos MP 204 Instrucciones De Instalación Y Funcionamiento

8.2 Input for Pt100/Pt1000

See fig. 6, pos. 5.
Terminal
Description
designation
+ Resistance input.
Correction for conductor
resistance.
To be connected by means of a
C
three-core Pt100/Pt1000
connection, otherwise the two "C"
terminals are to be short-circuited.
Correction for conductor
resistance.
To be connected by means of a
C
three-core Pt100/Pt1000
connection, otherwise the two "C"
terminals are to be short-circuited.
SH 0 V (screen).
For examples of Pt100/Pt1000 connection, see figs
and 8.
E1
Pt100
Pt100/Pt1000
Fig. 7 Two-core Pt100/Pt1000 connection

8.3 Input for PTC/thermal switch

See fig. 6, pos. 3.
Terminal
Description
designation
T1
Connection of PTC/thermal switch
T2
If not used, short-circuit the PTC input using a wire,
or deactivate it with Grundfos GO Remote.
7
MP 204

8.4 Backup fuses

Maximum backup fuse sizes which may be used for
MP 204 appear from the table below:
MP 204
Without external current
transformer
With 200/5 external
current transformer
With 300/5 external
current transformer
With 500/5 external
current transformer
With 750/5 external
current transformer
With 1000/5 external
current transformer
At motor currents up to and including 120 A, the
cables to the motor can be taken directly through the
L1-L2-L3 of MP 204.
At motor currents above 120 A, current transformers
must be used. See fig. 5, pos. 1.
If backup fuses above 50 A are used, the L1-L2-L3
and "5" to MP 204 must be protected separately with
maximum 10 A fuses. See fig. 8.
If current transformers are used, the L1-L2-L3 and
"5" to MP 204 must be protected with maximum 10 A
fuses.
For installation examples, see figs
Maximum size
Type
[A]
120 RK5
200 RK5
300 RK5
500 RK5
750 RK5
1000 RK5
8 to 12.
11