Year1
- 尺寸：
- 48mm*80mm*120mm
1. Performance characteristics
The motor thermal protector (hereinafter referred to as the protector) is suitable for submersible mixers r and submersible propellers r , Winding overheating protection and control of submersible sewage pump r. It can be applied to all submersible pumps of Nanjing Beite, Shanghai Chuanyuan, Lanshen Group, Yangzijiang Pump Industry, Nanjing Brooklyn or other similar pumps.
2. Principle
According to the structure and characteristics of the submersible pump working underwater for many years, it is necessary to add oil chamber leakage protection and motor over-temperature protection to the protection device of the submersible pump: B series water leakage protector mainly It is designed to protect the leakage of the submersible pump oil chamber. The motor thermal protector is mainly used to protect the submersible pump motor from overheating.
Oil chamber leakage protection: A moisture detection electrode is placed in the oil chamber of the submersible pump. If there is moisture in the oil chamber that exceeds the limit, the electrode will have a signal jump. The protector can detect the change in this signal and stop The submersible motor runs and indicates a fault.
Motor over-temperature protection: Install a ℃ C thermistor on each phase of the three-phase motor winding of the submersible pump. When the temperature of any phase winding rises to ℃, the resistance value will jump, and the protector can detect this. A change in the signal stops the submersible motor and indicates a fault.
Motor overload protection: Insert a thermal relay corresponding to the applied current into each phase line of the three-phase motor operating circuit of the submersible pump. Once the current is too large, the thermal relay will jump state. This signal is generally in the secondary circuit. be protected.
Low water level protection: In the pool where the submersible pump works, a liquid level detector is used to detect the water level. However, when the water level is lower than the water level where the submersible pump works, the liquid level detector will jump in status and stop the operation of the submersible motor. Indicated by low water level.
3. Main performance
Sensor power supply:
Sensor C power supply.
Power supply transformer isolation.
Signal input:
Winding over-temperature signal: Motor winding over-temperature protection.
Input hysteresis control: .
Signal input: C switch signal input or resistance or current signal input.
Signal response speed:.
Signal output
:
Relay output contact capacity: /C or /C.
Winding fault output: one set of relays is normally open and one set is normally closed.
Power supply and fault indication: power indicator (green) light.
Winding fault indicator (red) light.
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Protector
Input voltage, rated power consumption is less than.
Ambient temperature: ℃～℃.
Ambient humidity: below (no condensation).
Dimensions, weight:.
Installation method: Guide rail installation.
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