Brand : SIEMENS
Numeric and alphanumeric displays are used in systems where information is so diverse that it can no longer be displayed using individual indicator lights.
3RN1 thermistor motor protective relays offer substantial advantages wherever current-dependent protection over circuit-breakers or overload relays is simply not enough
Thermistor Motor Protection
3RN1 thermistor motor protective relays offer substantial advantages wherever current-dependent protection over circuit-breakers or overload relays is simply not enough: in certain situations overheating may occur, which the thermal mapping in the circuit-breakers/ overload relays is unable to detect.
Application
- Heavy starting (e.g. centrifuges)
- Frequency converters
- Frequent switching
- Impeded cooling, e.g. due to soiled environment (paper and textile industry, cement works)
- Braking operations
- "Warn and Break" function through implementation of two thermistors with different response temperatures
- Multimotor protection with a single device, e.g. for conveyor lines where several motors need to be - - -switched off simultaneously