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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
PTC-resistor relays type MS
PTC-Resistor-Relay Type MSF220VL
for Dry-Transformers, Fan, Warning, Trip Winding and Trip Core
Technical Data
The MSF220VL is particularly
suitable for monitoring of tem-
peratures at dry transformers,
when also the temperature of
the core shall be measured.
Monitoring of core temperature
is especially required in rectier
transformers because of harmo-
nics causing heat in the core.
An intelligent control prolongs
automatically the runtime of
a cooling-fan, depending on
the load of the transformer.
Each PTC-circuit is monitored for
break and short circuit. This re-
duces probability of false alarms.
Relays in operating-current mode
prevent from a trip-signal when
switching on supply voltage.
The device can be adapted to dierent applications
with 4 programs:
1.) Fan-control - alarm - trip (winding) - trip (core)
2.) Alarm - trip (winding) - trip (core) - alarm (fault)
3.) Fan-control - alarm - trip (winding) - alarm (fault)
4.) Fan-control with hysteresis T1/T2 - alarm - trip
(winding) - time relay
•
•
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•
•
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4 inputs for PTC
Intelligent control of fan
Automatic fan-test 1x / week
electronic reclosing lock for alarms (trip) connec-
table
Monitoring of sensors
Test-button
Simple testing with disconnectable monitoring of
break and short circuit (for 10 minutes)
LEDs for alarms, states of relays and sensors
Housing for mounting on DIN-Rail or wall-mount
(option)
Mounting height 55 mm
Universal supply voltage AC/DC 24-240 V
AC/DC 24 - 240 V ± 15 %, < 3 VA
4 x 1... 6 PTC according to DIN 44 081 or 44 082
< 4000 Ω
4 x 1 change-over contacts
type 2 see "general technical information"
see "general technical information"
-20... +60 °C
design V 4: 90 x 70 x 58 [ mm ]
on 35 mm DIN rail according to DIN EN 50 022
or with screws M4
IP 30 / IP 20
approx. 185 g
Rated supply voltage U
S
connectable PTC resistors
switching point
output relays
type of contact
test conditions
rated ambient temperature
range
dimensions (h x w x d) attach-
ment
protection housing / terminals
weight
2016-10-14
Kaltleiter-Relais
.com
Reset
Test
MSF220VL
ALARM 1 / Fan
ALARM 2
~
+
~
–
Us
24...240 V
_
~
22 21 24 32 31 34A1 A2 42 41 44
ALARM 3 ALARM 4
1T1
1T2 2T1
2T2
3T1 3T2
4T1
4T2
141112
Us
DC +
AC ~
-
~
4x 1...6 PTC
MSF220VL
Part number:
T221674 AC/DC24-240 V
1
