ZIEHL industrie – elektronik GmbH + Co KG
Daimlerstraße 13, D – 74523 Schwäbisch Hall
+ 49 791 504-0, info@ziehl.de, www.ziehl.de
Temperature Relays and MINIKA® Mains Monitoring Digital Panelmeters MINIPAN® Switching Relays and Controls Measuring Transducers Grid- and Plant Protection
Operating Manual MS220K and MSR220K
updated: 2015-11-25/Fz
MS220K and MSR220K 10750-0702-00 Page 1 / 8 www.ziehl.de
- PTC-Resistor-Relay
MS220K and MSR220K 10750-0702-00 Page 2 / 8 www.ziehl.de
Table of contents
1 Application and Short description ........................................................................................................ 3
2 Wiring scheme ........................................................................................................................................ 3
3 Display and Operating Elements ........................................................................................................... 4
4 Functional overview ............................................................................................................................... 4
5 Detailed description ............................................................................................................................... 4
6 Action Chart ............................................................................................................................................ 5
7 Important Notes/ Putting into operation ............................................................................................... 5
8 Assembly ................................................................................................................................................ 6
9 Trouble – shooting and remedies .......................................................................................................... 6
10 Technical data ........................................................................................................................................ 7
11 Design K .................................................................................................................................................. 8
MS220K and MSR220K 10750-0702-00 Page 3 / 8 www.ziehl.de
1 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.
ZIEHL PTC-resistor relays are designed for PTC-sensors according to DIN 44081 and DIN 44082. Therefor
sensor and relays are exchangeable. PTC-resistor sensors 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, countercurrent operation
undervoltage and phase failure
increased ambient temperature and hindered cooling
Approvals:
UL Recognized Component
without electronic reclosing lock MS220K
with electronic reclosing lock MSR220K
2 Wiring scheme
Us = supply voltage
S1 = pushbutton OFF
S2 = pushbutton ON
S3 = external reset
H1 = trip alarm
K1 = contactor
F1 - F4 = fuses
1) only versions with 2x CO
2) only MSR
MS220K and MSR220K 10750-0702-00 Page 4 / 8 www.ziehl.de
3 Display and Operating Elements
MS220K MSR220K
Reset-Button
Alarm red ON = green
ON green Alarm = red
4 Functional overview
1 PTC-resistor set with up to 6 PTC-sensors (250Ω) in series
output relay with 1 or 2 change-over contact (co)
operating status display with LED
K-Housing, vertical terminal order
width 22.7 mm
snap mounting on 35 mm standard DIN rail or screw mounting
5 Detailed description
A current monitors continuously the resistance of the sensors. In cold state, the resistance is <250 Ω per
sensor (sensor circuit < 1,5 kΩ). The relay has picked up and contacts 11/14 (21/24) are
closed(LED/Button=GN). The resistance of the sensor rises rapidly at nominal response temperature NRT.
The relay releases at a resistance of 3…4 kΩ and contacts 11/12 (21/22) close(LED/Button=RED). MS types
switch on automatically when the temperature has decreased approx. 5 °C. MSR types with electronic
reclosing lock switch on again when the temperature has decreased approx. 5 °C and RESET is made (push
built-in button or external RESET with terminals Y1/Y2 closed) or by return of supply voltage.
Motorschutz-Relais MSR 220 K
Reset
.com
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Motorschutz-Relais MS 220 K
MS220K and MSR220K 10750-0702-00 Page 5 / 8 www.ziehl.de
6 Action Chart
MS220K MSR220K
7 Important Notes/ Putting into operation
Attention!
Before switching on make sure that the operational voltage Us of the
type- plate and the mains voltage are the same.
Attention!
Trip relays with supply voltage DC/AC 24 V are intended to use at
power supplies according EN 61558. Wiring connection must be
protected.
Attention!
Trip relays type MSR220K 2 with electronic reclosing lock switch on
automatically by return of the supply voltage. To prevent
automatically start-up the applicant must install additional
components or monitor the power supply lines.
Attention!
To safeguard the safety function of the device connect the outputs
directly in the control circuit of the equipment according terminal
plan The relay contacts must be fused externally to prevent welding
of the contacts.
!
!
!
1500 ¦
LED ON
3650 ¦
A1/A2
11
12
14
21
22
24
LED ALARM
T1/T2
!
1500 ¦
(Reset)
ON/Alarm
3650 ¦
A1/A2
11
12
14
21
22
24
T1/T2
!
Y1 Y2
RD RDGN GN GN GN
!
MS220K and MSR220K 10750-0702-00 Page 6 / 8 www.ziehl.de
8 Assembly
The applicant must observe safety rules and standards.
The trip relays must be installed within rooms of international protection class IP 54 or better.
The device can be mounted:
on 35 mm standard rail EN 60715
with screws of type M4 for wall fastening
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.
9 Trouble – shooting and remedies
Relay does not pick up. Please check
The supply voltage Us at terminals A1-A2. With ready for use equipment type MS the green LED shines;
with type MSR the inserted RESET button shines green.
The PTC’s at terminals T1-T2. In the case of disturbance the red LED shines, with type MSR the inserted
RESET button shines red.
The resistance of a PTC circuit must be at 0 Ω < R < 1500 Ω. The terminal voltage T1-T2 is to be
measured < 2,5 V with connected PTC <1500 Ω.
Attention! Check PTC’s only with measuring voltages of < 2.5 V.
With relay type MSR please push the Reset button. The relay can pick up at resistance R <1,65 kΩ. LED
(or RESET button) changes from red to green. Alternatively reset can be done with closing an external
contact at terminals Y1-Y2 or with power recovery.
Relay does not release. Please check
With no PTC sensor connected the PTC Trip 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.
MS220K and MSR220K 10750-0702-00 Page 7 / 8 www.ziehl.de
10 Technical data
Power supply
Rated supply voltage Us AC 110-120 V, AC 220-240 V
(see lateral type plate)
AC/DC 24 V (no potential separation)
Tolerance voltage Us AC 0,9 Us … 1,1 Us DC 21 ... 30 V
Frequency (AC) 50 / 60 Hz
Tolerance frequency 45 - 62 Hz
Power consumption <2 VA
PTC-resistor connection PTC-sensor according to DIN 44081/82
Number set with 1 ... 6 PTC´s in series
Cut-out-point 3,3 kΩ…3,65 kΩ…3,85 kΩ
Reclosing point 1,7 kΩ…1,8 kΩ …1,95 kΩ
response tolerance of system ±6 °C
Collective resistance cold sensors ≤1,65 kΩ
Terminal voltage (sensors) ≤ 2,5 V at R ≤3,65 kΩ, ≤ 9 V at R =
Terminal current (sensors) <1 mA
Power consumption <2 mW
Relay output EN 60947-5/IEC 947-5
Contacts 1 or 2 change-over contact (co)
Switching voltage max. AC 415 V
Switching current max. 6 A
Switching power AC cos = 1 max. 2000 VA
max. 120 W at DC 24 V
Rated operational current Ie 3 A AC15 250 V ; 2 A DC13 24 V
Recommended fuse 3,15 A gl (slow)
Mechanical contact life 3 x 107 operations
Electrical contact life 1 x 105 operations at 240 V / 6 A
1 x 106 operations at 240 V / 2 A
Factor of reduction at cos=0,3 0,5
UL electrical ratings 250 V ac, 3 A, general use
240 V ac, 1/4 hp, 2.9 FLA
120 V ac, 1/10 hp, 3.0 FLA
C 300
Testing conditions EN 60 947
Rated impulse voltage 4000 V
Overvoltage category III
Contamination level 3 2
Rated insulation voltage Ui 250 V 415 V
Transformer EN 61558-2-6 (VDE 0551)
On-period 100 %
Rated ambient temperature range -20 ... +55 °C
EN 60068-2-2 Dry Heat
EMC - Immunity EN 61000-6-2
EMC - Emission EN 61000-6-3
Vibration resistance EN 60068-2-6 2…25 Hz ±1,6 mm
25 ... 150 Hz 5g
MS220K and MSR220K 10750-0702-00 Page 8 / 8 www.ziehl.de
Housing: design "K"
Dimensions (H x W x D) 75 x 22,5 x 110 mm
Line connection 1 x 0,5…2.5 mm2 each
Protection housing EN 60529 IP 40
Protection terminals EN 60529 IP 20
Panel inclination any
Attachment on 35 mm standard rail according to EN 60715
Optional: screws M4, only with extra bar
(not enclosed)
Weight approx. 150 g
Subject to technical modifications
11 Design K
dimensions in mm
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