PTC-Resistor-Relay Type MSR220K
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
Replaces the following items:
MS220K: T221741, T221743, T221761, T221765 and T221749
MSR220K: T221771 and T221775
Functional overview
- 1 PTC-resistor set with up to 6 PTC-sensors (250O), or bimetal contacts 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
- electronic reclosing lock (disconnectable)
- integrated RESET-button
- link for external RESET
- automatic RESET at voltage recovery
- LEDs for power ON (green) and ALARM (red) in reset-button
- UL recognized component
- Option: other supply voltages
Version with spring terminals RoHS/REACH compliant
Further information can be found in our customer information: “New terminals for K-type devices”
| Applications: | Protection of transformers, Combined heat and power plant (CHP), Protection of motors, Protection of pumps |
|---|---|
| Approval: | UL/CSA, EU / UKCA-Declaration of Conformity |
| Design: | Mount in switchgear cabinet |
| Extras: | Thermistor-Relay, 1 sensor input, Reclosing lock |
| Input/ Measured parameter: | PTC |
| Outputs: | Outputs/Relays |
| Product group: | Temperature Measurement |
| Supply voltage: | AC/DC 24 - 270 V |
