In energy production, shipbuilding and heavy industry, fitting diesel engines requires reliable protection against overload and short circuits. CT for motor protection relay (current conveyor for monitoring motor protection) is an essential component for detecting fault currents and performing protection procedures. The HPR series low voltage protection converter has been used in many industrial scenarios.
1. Application scenarios in the power generation industry
1.1 Diesel generator set protection of the outer line
The outside of the generator set must be equipped with a CT for motor protection relay to monitor the output current. In case of overload or short circuit, the converter quickly sends a signal to the safety transmitter to turn off the error. The HPR series has a maximum current of 8000A and is suitable for diesel generators with an output of 100 kW up to several megawatts.
1.2 Engine protection Assistance in factory power supply
CT for motor protection relay can be installed in auxiliary motors such as power pumps and a fan's Stimulated Disc for real-time current monitoring. If the motor is stopped or overloaded, the protection transmitter is activated immediately to prevent the error from spreading. The HPR series has an accurate limit value of 5P10 / 5P20 and meets the speed requirements of power plant protection.
2. Application scenarios in shipbuilding
2.1 Host auxiliary system engine protection
The auxiliary motors such as the oil pump and cooling water pump of the ship's main engine need to be continuously monitored for current using CT for motor protection relay. After an excessive load or short circuits, the transmitter switches off the alarm and switches to the backup pump. The HPR series operates in the temperature range of -25°C to +75°C, with a burn-free skin suitable for high temperature and high humidity environments in the cabin.
2.2 Ship power plant generator protection
Many diesel generator units work in parallel in the ship's power station, and the production station of each generator must be equipped with a CT for motor protection relay, to ensure protection against overcurrent and short circuits at the same time as the protective devices. The HPR series is IEC 61869-2 compliant and is the ideal choice for ship electrical compliance.
2.3 Protection of surface machinery of the ship and auxiliary machinery of the cabin
Mounting machine, dead pump and other equipment work frequently, and installing CT for motor protection relay in the control cabinet can prevent the motor from burning out. The HPR series is small and supports the installation of DIN rails, which facilitates their arrangement in confined spaces.
3.Application scenarios in heavy industry
3.1 Mining crusher and transport engine protection
Drive motors for large crushers and conveyor belts must be equipped with CT for motor protection relays to detect start and stop currents. When the support belt is closed or the space is overloaded, the converter motor will shut down. HPR series offers a variety of opening sizes, to facilitate the passage through thick cables or copper rods.
3.2 Protection of auxiliary motors for steel processing plants
The ambient temperature of roller bearing motor and lubrication pump motor is high and there is a lot of dust. CT for motor protection relay is widely used in MCC cabinets. The CT for MCC panel special model of the HPR series can be mounted directly into the MCC stair unit and can be used in conjunction with the motor protection, to achieve overload and protect against phase loss. Meanwhile, as a current transformer for distribution board, it is also suitable for current monitoring of workshop distribution boards.
3.3 Protection of pump units and petrochemical compressors
For important loads, such as diesel-powered emergency pumps and fire pumps, CT for motor protection relay is used in the switchgear, to capture current signals and send them to the central control. The HPR series can be installed as a current transformer for switchgear panel in low voltage circuit boards with a by-output of 5A or 1A, compatible with the prevailing protective equipment.
4. Conclusion
For dealers with spare parts for diesel engines in power generation, For shipbuilding and heavy industry, the HPR series power converters are the reliable choice for the combination of many application scenarios. It plays an irreplaceable role as a tool for evaluating the measure of continued motor protection in the protection of the motor, the motor control, the distribution board and the switch. Integration of the HPR series into the product catalogue to provide customers with a more complete solution for the electrical protection of diesel engines.
Compay: WENZHOU HEYI ELECTRICAL CO.,LTD
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com
Tel: 86-13968747975
