PTC-Relay type MSF220K
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PTC-relay for the monitoring of dry transformers. Alarm 1 with relay in closedcircuit current mode for preliminary warning, releases at over-temperature at PTC-set 1 and serves at the same time as functional monitoring. Alarm 2 in operating current mode. Thus no wiping signal occurs when switching on the supply voltage on. Additional terminals enable comfortable wiring from supply voltage to relays K1 and/or K2.
Changes from T221717 / T221718 to T228143 / T228144: Version with spring terminals RoHS/REACH compliant
Further information can be found in our customer information: "New terminals for K-type devices"
Changes from T221715 / T221716 to T221717 / T221718: cURus, monitoring of sensors for short circuit an interrupt activatable, improved test function
Functions
- 2 PTC resistor sets
- 2 output relays 1 change-over contact (co)/ 1 normally open contact (no)
- monitoring of sensors for short-circuit and break activatable
- TEST-button (delayed)
- LEDs for ON, alarm 1 and 2
- red LEDs for alarm 1 and alarm 2
- K-type housing
- Housing for mounting on DIN-rail 35 mm or wall-mount with screws M4
- Replacement for foreign device Elbag/Joppich TS-01
Technical specifications
CAD Data
Certificates
FAQ / Product videos
Accessories
Normal PTC-resistor relays can be tested by simply disconnecting the sensor. PTC-resistor relays with monitoring of sensor short-circuit and break need more sophisticated test-equipment.With help of the ZIEHL MS-Tester also these relays can be easily tested for correct function. The included cable is designed for the connection of relays type MSF 220 V(U). Also any other PTC-resistor relay can be connected to the MS-Tester.Testdisconnect the PTC-resistor relayconnect the MS-Tester (T/0, T/1 and/or T/3) to the sensor inputsswitch on the relayincrease the resistance with the potentiometer (turn slowly) until the appropriate Alarm switchesreduce the resistance until the relay switches back (or a LED signals, that it is ready to switch back)if necessary, the values of the switching points can be measured at the terminals T/0, T/1, T/2 after disconnecting the relay. Typical values are 3000 O ... 4000 O for tripping and >1500 O for switching back.test break with push-button (only at relays with monitoring of sensor/line-break)test short circuit with push-button (only at relays with monitoring of sensor/lineshort-circuit)ATTENTION: At relay MSF 220 V(U), break or short-circuit in any sensor will result in an error message = ALARM 1. The LED "sensor" lights and the LED of the appropriate alarm blinks.HINT: cold PTCs have a resistance of 20...250 O, typical 50...120 O per sensor.
