PTC-Resistor-Relay Type MS40ZT
The PTC-resistor relay MS 40 ZT monitors particularly engines at elevator cars and lifts. A pulse input monitors the movement of the elevator car as long as the motor is switched on.
- watchdog timing adjustable 5 - 50 s.
- temperature monitoring with PTC-resistor
- integrated RESET-button
- LED for temperatur alarm
- LED for watchdog alarm
At elevator systems the temperature of the motor and the travelling motion have to be monitored. With the car at rest and contact between terminals 2 and 5 closed, the integrated relay picks up (terminals 8, 9 connected). The time monitoringstarts with the opening of the contact between terminals 2 and 5. Then the pulse input between terminals 3 and 6 must continously open and closeduring travelling motion. When the pulse stops or the nominal response temperature of the PTC-resistor is exceeded, the relay releases. Each disconnection is locked. A restart by pressing the RESET-button is only possiblewith closed contact between terminals 2 and 5 and low-resistive sensor.
| Product group: | Temperature Measurement |
|---|---|
| Input/ Measured parameter: | PTC, Digital input |
| Outputs: | Outputs/Relays |
| Supply voltage: | AC 220-240 V |
| Design: | Mount in switchgear cabinet |
| Approval: | EU / UKCA-Declaration of Conformity |
| Extras: | 1 sensor input |
| Applications: | Combined heat and power plant (CHP), Protection of motors, Protection of pumps |