GINRI SVR1000 Single Phase Voltage Relay Adjustable Over Under Voltage Protection Monitor Relay with LCD display

The Features of SVR10000
-- Powered by the measuring circuit
-- Built-in LCD and keypad afford a precise,digital setting
-- Compact modular 43mm housing
-- Adjustable over- and undervoltage threshold
-- Independent adjustable delay time for overvoltage, undervoltage
-- 1 CO & 1NC contacts
-- Fault recording with last 3 faults

♦ Protective Functions
-- Overvoltage
-- Undervoltage

♦ Typical Applications
• Pumps • Fans
• Blowers • Motors
• Compressors

♦ Approvals
• CE • CCC

♦ Technical data

The reason of used the over under voltage relay

Take the electric equipment on the line as an example. If the electric energy can't keep up, the voltage will drop very much. According to the formula: P=U*I, U becomes smaller, I will become larger, and U is smaller than the current I on the line. It will be bigger.
For example, when U starts, it is U1. At this time, I=I1=P/U1. If the power can't keep up at this time, because the power consumption P needs to be used, the U drops to 0.5U1. Current:
I=P/U=P/(0.5U1)=2*(P/U1)=2I1
In other words, if the voltage drops by half, the current will double.
In this case, the problem comes. According to the well-known Joule law: heat quantity Q=I*R*T
The resistance value R of any device on the line is certain. If the previous line heat is Q1=I1*R*T, the voltage U changes to 0.5U1, the current I is 2I1, and the line heats up Q2= I*R* T = (2I1) * R * T = 4 * I1 * R * T = 4Q1, that is, if the voltage drops by half, the heat generated per unit time will become four times the previous one.
It can be seen that the change of the heat per unit time of the device on the line is inversely proportional to the square of the change of the line voltage. Therefore, the more the voltage drops, the greater the heat generated by the device on the line, and the heat accumulation of the device on the line exceeds the thermal diffusion. The speed of the device will become higher and higher, which may cause accidents such as fire.
Therefore, it is necessary to set a threshold voltage for the line. When the line voltage drops to this threshold voltage, the line is cut off by a relay protection device or the like, thereby ensuring that the device on the entire circuit does not burn out. This is called undervoltage protection.

GINRI POWER AUTOMATION CO.,LTD. is a professional production voltage phase sequence protection device (and name: three-phase power monitor), and PLC output zoom Board, and smart type motor integrated protection device, and industrial parts manufacturers, technology development team in elevator industry, and refrigeration industry, and crane industry, environmental equipment, mechanical NC industry and the industrial following insurance industry, field has more than 10 years practice experience, has development out variety price economic and function excellent of products. CQC product quality system by China Quality Centre (3C) certification and CE certification, products in the manufacturing process in strict accordance with the ISO9001 quality assurance system requirements and professional technical and service support.

Voltage phase-sequence protection for many years (equipment, refrigeration equipment, crane (passenger and goods) elevators, control of DC power supply system (Cabinet) screens, precision air conditioners, room air conditioners, electric hoist, boiler equipment, laser equipment, parking equipment, cranes, compressors) and so on using the run.

PLC output amplifiers (environmental protection equipment, numerical control and automation equipment, automobile, plastic machinery, hydraulic machinery, ceramic foam machinery, woodworking machinery, machinery) and so on using the run.

Years of integrated Intelligent motor protector (power plants, paper mills, steel mills, aluminium plants, cement plants, sewage treatment plants, coal preparation plants, refineries, petrochemical plants), and so on using the run.

Product quality is stable and safe, reliable, and earned a solid market position in the market and a high reputation in the industry, received unanimous recognition and praise of our customers.

Ginri company always adhere to "scientific management as the core, the user needs for the Centre to focus on product quality, meticulous service is sincere," the spirit of enterprise, please call us from all walks of life, thank you!