Electrical DC Voltage Monitoring Relay over and under voltage relays

When the motor is in normal operation, excessive reduction of the power supply voltage will cause the motor speed to drop or even stall. When the load torque is constant, the motor current will increase sharply and cause over-current. In addition, the voltage is too low will cause some electrical appliances to release, cause the control circuit to work normally, may have the accident. Therefore, it is necessary to cut off the power supply when the voltage drops to the minimum allowable value. This is undervoltage protection. Its task is mainly to prevent equipment from burning due to overload.

When the voltage drops, the motor runs under voltage. Since the load of the motor is not changed, the motor speed falls under the voltage and the current in the stator winding increases. Because the magnitude of current increase is not enough to make fuses and thermal relays act, both appliances will not protect. Failure to take protective measures will overheat and damage the motor over time. In addition, the under voltage will cause some electrical appliances to release, making the circuit unable to work normally. Therefore, avoid long-term operation of the motor under voltage

The DVM-A is the device can protective over and under voltage for dc circuit which can monitoring long time arrivaled several years the two LED light could Prompt the situation of cabinet or electrical cotrol system

The adjustable setting with potentiometer and the delay time is from 1~10 second adjustbale

♦ Features

-- DC circuit monitoring of over and undervoltage

-- Adjustable over- and undervoltage threshold
-- Adjustable trip delay time

-- Powered by the measuring circuit

-- 1 C/O contact

-- 2 LEDs for status indication

♦ Protective Functions

-- Overvoltage

-- Undervoltage

♦ Typical Applications

• DC cabinet • Batteries

• Electric control system

♦ Approvals

• CE • CCC

♦ Technical data

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!