MS220VA and MSR220VA
11660-0701-03-GB
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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 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
MSR220VA devices have an 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 resistan
ce 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 type:
please push the key button “Reset”. The relay can pick up at resistance R < 1.65 kΩ and
the 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:
(see type plate on the device)
AC 48 V
AC 110-120 V, AC 220-240 V, AC 380-415 V
AC / DC 24 V (ohne Potenzialtrennung)
Tolerance of voltage Us
AC 0.
9 Us …1.1 Us
DC 21 ... 30 V
Frequency (AC)
Tolerance of frequency
50 / 60 Hz
45 Hz … 65 Hz
Power consumption
< 2 VA
< 2 W
On-period
100 %
Voltage dip buffer time
Max. 20 ms
