This system is designed for two fire pumps, with one in operation and the other on standby. Once the operating fire pump malfunctions and stops, the standby pump will automatically start, ensuring a reliable supply of fire - fighting water. Additionally, it provides protection for the motors against phase loss, overload, short - circuit, etc

The one-drive-multiple constant-pressure water supply control cabinet receives signals from the remote-transmitting pressure gauge installed on the pipeline. It regulates the operation of water pumps to maintain a constant pressure as set by the gauge.

During periods of low water consumption, the pumps operate at a low frequency. Conversely, when demand is high, the pump speed is adjusted to ensure the pipeline pressure stays within the predefined range. If a single pump is insufficient to uphold the set constant pressure, it is automatically shifted to bypass operation. Subsequently, the frequency converter will initiate a second pump, guaranteeing that the pipeline pressure is consistently maintained at the value set by the remote-transmitting pressure gauge.

The electronic soft starter cabinet triggers thyristors and adjusts their phase angles to make the voltage climb from 160V to 400V. This creates a soft - start process for three - phase squirrel - cage motors, enabling them to ramp up from low to high speed. Consequently, the motor current gradually increases, realizing the soft - start function.

The liquid resistance step-up starter cabinet combines mechanical and electrical means to start squirrel-cage motors. It uses an electro - hydraulic water tank to generate resistance, allowing the voltage to gradually increase from a low level. This process achieves the motor's soft-start function and reduces the starting current.

The XJ-type reactive power compensation cabinet uses non-contact switches and contactors, along with power electronic capacitor switching and random reactive power direct sampling technologies. It can resist inrush current and interference, operates reliably, and withstands switching overvoltage.

Ideal for reactive power compensation in urban/rural grids, oil fields, and internal grids of industrial and mining enterprises, it can be installed on outdoor pole-mounted transformers with voltages of 10/0.4kV or 0.6/0.4kV, having extensive applications. 

GGD series switchgear is suitable for distribution system of AC 50Hz, rated working voltage 380V, rated working current up to 4000A in power plant, transformer substation, industrial and mining enterprise, tall building, to transfer, distribute and control the electric energy of power, lighting and distribution equipment. The product conforms to IEC439Low-voltageswitchgear and controlgear assembly, Gb7251Low-voltage Complete Switchgear.

The GCK series switchgear comprises a Power Distribution Center (PC) cabinet and a Motor Control Center (MCC) cabinet. Suitable for power distribution systems in power plants, substations, industrial and mining enterprises, etc., it's used in a 50Hz AC system with a max. operating voltage of 660V and current of 3150A for power distribution, motor control, and lighting power conversion and control.

Advantages include high breaking capacity, good dynamic and thermal stability, an advanced and rational structure, practical electrical schemes, strong seriality and universality, arbitrary unit combination, more circuits per cabinet (saving space), an appealing look, high protection level, safety, reliability, and easy maintenance.

The GCS series switchgear is suitable for the power distribution systems in industries such as power plants, petroleum, chemical engineering, metallurgy, textile, and high-rise buildings. In places with a high degree of automation like large power plants and petrochemical systems, which require interfaces with computers, it serves as a low-voltage complete power distribution device in the power generation and supply systems.

It is applicable for power distribution, centralized motor control, and reactive power compensation in a three-phase AC system with a frequency of 50(60)Hz, a rated operating voltage of 380V(400V),(600V), and a rated current of 4000A and below.

The MNS series switchgear is a modular combined switchgear assembled with standard modules. It is suitable for AC power supply systems with a frequency of 50Hz or 60Hz and a rated operating voltage of 660V and below. It is applied to control power generation, power transmission, power distribution, power conversion, and power-consuming equipment.

Complying with the standards of IEC529 and DIN40050, it has different protection levels. IP30 protects against solids larger than φ2.5mm, IP40 guards against solids larger than φ1.0mm, and IP54 offers protection against dust and splashes from any direction.