MS220C
12150-0703-03
Seite
2 / 8
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Table of contents
1
Display and control elements ................................................................................................................ 2
2
Pre-Adjustment ....................................................................................................................................... 2
3
Application and short description ......................................................................................................... 2
4
Summary of functions ............................................................................................................................ 3
5
Connecting diagram: .............................................................................................................................. 3
6
Function diagram ................................................................................................................................... 3
7
Important notes ...................................................................................................................................... 4
8
Installation .............................................................................................................................................. 4
9
Commissioning....................................................................................................................................... 5
10
Trouble shooting .................................................................................................................................... 5
11
Maintenance and repair .......................................................................................................................... 5
12
Technical data ........................................................................................................................................ 6
13
Form C ..................................................................................................................................................... 8
1
Display and control elements
The MS220C is a built-in device and has no display or operating elements. The status can be signalled by
monitoring the normal closed contact and an external signal lamp.
2
Pre-Adjustment
No settings are necessary on the devices. The tripping temperature is determined solely by the response
temperature of the connected PTC thermistors.
Depending on the number of PTC thermistors the following tripping temperatures and reset temperatures
arise related to TNF (detector operating temperature):
Tripping temperature
Reset temperature
1 PTC thermistor
TNF + 15 K
TNF + 5 K
3 PTC thermistors in series
TNF + 5 K
TNF
– 5 K
6 PTC thermistors in series
TNF
TNF
– 20 K
3
Application and short description
ZIEHL PTC-resistor relays protect motors, transformers, machines and equipment against thermal overload.
With ZIEHL PTC Sensors MINIKA ® applied they offer best solutions for nominal response temperatures
60°C…180°C.
TMP tripping device is according EN 60947-8 (VDE 0660 part 0302). PTC- thermistor sensors according
DIN 44081 und 44082 (VDE 0660 part 0303) can be connected. PTC- thermistors are suitable for the
installation into windings of electrical machines, bearings and transformers as well as to monitor the
temperature of liquid media, airflow and gases.
Used in conjunction, they provide a effectively and reliable protection in case of
•
blocking rotors, heavy starts, counter current operation
•
under voltage and phase failure
•
increased ambient temperature and hindered cooling
