Wenzhou Ginri Power Automation Co., Ltd. |
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GINRI Voltage Monitoring Relay DC Over/Under Voltage Relay DVRD
Features:
Protective Functions
Applications
Model | DVRD | |||||||||||||||
Input circiut =measuring circuit | DC supply | |||||||||||||||
Rated voltage | DC12V.DC24V.DC36V,DC48V | |||||||||||||||
Monitoring functions | Overvoltage,undervoltage | |||||||||||||||
Voltage setting range |
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Tripping delay time | 0.1~15s adjustable | |||||||||||||||
Voltage hysteresis | 3-5% fixed | |||||||||||||||
Reset delay time | 100ms | |||||||||||||||
indicators | normal,trip | |||||||||||||||
Output contacts | 2C/O | |||||||||||||||
Contact capacity | 6A,250VAC/30VDC(resistive load) | |||||||||||||||
Degree of protection | IP20 | |||||||||||||||
Working conditions | -25℃~65℃,≤85%RH,non-condensing | |||||||||||||||
Mechanical durability | 1000000 cycles | |||||||||||||||
Dielectric strength | >2KVAC 1min | |||||||||||||||
Weight | 130g | |||||||||||||||
Dimension(HXWXD) | 79X23X79mm | |||||||||||||||
Mounting | Din rail |
Low voltage protection
Also known as loss of voltage protection and undervoltage
protection. A protection measure that automatically disconnects the
circuit when the supply voltage disappears or falls below a certain
value. Its function is to avoid accidents caused by the sudden
start of the device when the voltage is restored; and to avoid
damage due to the bare operation at low voltage. At low voltage,
the equipment can only maintain its operation when the current is
increased. The current increases, and the heating temperature is
naturally intensified. If it is light, it will damage the equipment
and cause fire. For important protection objects, the device
consists of voltage relays, time relays and circuit breakers, and
the protection performance is relatively accurate. For general
low-voltage equipment, common fuses, contactors and loss-of-voltage
(undervoltage) trip units are used as protection devices. [1]
Low voltage protection means that the low voltage protection relay
is connected in parallel at both ends of the power supply. When the
voltage is low, it will automatically trip to separate the circuit
breaker switch. Low-voltage internship installation: low-voltage
equipment such as thermal relays, fuses, and intermediate relays.
When the voltage of the power supply bus of the motor is reduced or
interrupted and restored, the low voltage protection is usually
installed on the secondary motor to prevent the motor from being
automatically started at the same time. When the power supply bus
voltage is low to a certain value, the low voltage protection
action removes the secondary motor and restores the power supply
bus voltage to a sufficient voltage to ensure the self-starting of
the important motor.