MS220KA and MSR220KA
10580-0701-04-GB
Page
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When installing the device into the switchgear cabinet, please observe the max. admissible
temperature. Care for both, sufficient clearance to other devices or sources of heat or
enough forced draught. If cooling is made more difficult, e.g. close devices with increased
surface temperature or by handicap of airflow cooling, the permissible ambient temperature
has to be reduced.
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Commissioning
Attention!
Before switching on make sure that the operational voltage Us of the
Type plate and the mains voltage are the same!
After the supply voltage is switched on and when the thermistors are correctly connected the green LED
„ON“ must light-up and the relay contacts 11,14 and 21,24 close.
The correct function of the tripping device must be checked by resistance simulation at terminals T1 and T2.
This check is also performed after changes to the installation.
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Operating instructions
MSR220KA devices have an illuminated built-in reset button and can be manually reseted after a fault signal
(Red = alarm). For this purpose, also an external button (remote reset terminal Y1, Y2) can be used.
Terminals Y1 and Y2 may be bridged so the function reclosing-lock is disabled.
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Trouble – shooting and remedies
Relay does not pick up. Please check:
•
The supply voltage Us at terminals A1-A2 (green LED lights-up).
•
The PTC’s at terminals T1-T2. In the case of disturbance the red LED lights-up.
•
The resistance of a PTC circuit must be at
50 Ω < R < 1500 Ω. The terminal voltage T1-T2 is to be
measured < 2.5 Vdc with connected PTC.
•
MSR types please push the key button
“Reset”. The relay can pick up at resistance R < 1.65 kΩ and
the key button light changes from red to green. Alternatively reset can be done with closing an
external contact at terminals Y1-Y2 or with voltage recovery.
Relay does not release. Please check:
•
With no PTC sensor connected the relay must release. The voltage at terminals T1-T2 must be
approx. 8 V.
In case of any other malfunctions, replace device. Please add a description of the occurred malfunction
when sending back for repair.
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Technical data
Power supply (A1, A2)
Rated supply voltage Us
AC 110-120 V AC 220-240
AC 380-415 V
(see type plate)
AC / DC 24 V
(without potentially separation)
Tolerance of voltage
AC 0,9 Us -1,1 Us
DC 21 ... 30 V
Frequency (AC)
50 / 60 Hz
Tolerance of frequency
45 Hz
… 65 Hz
Power consumption
< 2 W
On-period
100 %
Voltage dip buffer time
Max. 20 ms