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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 rectifier

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.

Relaysinoperating-currentmode

prevent from a trip-signal when

switching on supply voltage.

The device can be adapted to different 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

•

•

•

•

•

•

•

•

•

•

•

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

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

Reset

Test

MSF220VL

ALARM 1 / Fan

ALARM 2

~

+

~

–

24...240 V

_

~

22 21 24 32 31 34

A1 A2

42 41 44

ALARM 3

ALARM 4

1T1 1T2 2T1 2T2 3T1 3T2 4T1 4T2

14

11

12

Us

DC

+

AC

~

-

~

4x 1...6 PTC

MSF220VL

Part number:

T221674

AC/DC24-240 V

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